/**
 * Deep Functionality Tests
 *
 * These tests go beyond basic page loads to verify:
 * 1. Settings actually change and persist across page reloads
 * 2. Research can be started and progress is tracked
 * 3. News subscriptions can be created
 * 4. Library collections can be created and managed
 * 5. Ollama/LM Studio URL configuration works
 * 6. API endpoints respond correctly
 */

const puppeteer = require('puppeteer');
const { expect } = require('chai');

// Import shared helpers
const {
    BASE_URL,
    HEADLESS,
    SLOW_MO,
    delay,
    takeScreenshot,
    ensureLoggedIn,
    getLaunchOptions,
    generateTestRunId
} = require('./helpers');

// Generate unique username for this test run - ensures fresh state each time
const TEST_RUN_ID = generateTestRunId();
const TEST_USERNAME = `test_user_${TEST_RUN_ID}`;
const TEST_PASSWORD = 'test_password_123';
console.log(`Test run ID: ${TEST_RUN_ID}`);
console.log(`Test username: ${TEST_USERNAME}`);

describe('Deep Functionality Tests', function() {
    this.timeout(300000);

    let browser;
    let page;

    before(async () => {
        console.log(`\nStarting browser (headless: ${HEADLESS}, slowMo: ${SLOW_MO})`);
        browser = await puppeteer.launch(getLaunchOptions());
        page = await browser.newPage();
        await page.setViewport({ width: 1400, height: 900 });
        page.setDefaultNavigationTimeout(30000);

        page.on('console', msg => {
            if (msg.type() === 'error') {
                console.log('Browser ERROR:', msg.text());
            }
        });

        // Login once at start
        await ensureLoggedIn(page, TEST_USERNAME, TEST_PASSWORD);
    });

    after(async () => {
        if (browser) await browser.close();
    });

    // Re-authenticate before each test if session was lost
    beforeEach(async function() {
        const url = page.url();
        if (url.includes('/login') || url.includes('/auth/login')) {
            console.log('  beforeEach: Session lost, re-authenticating...');
            await ensureLoggedIn(page, TEST_USERNAME, TEST_PASSWORD);
        }
    });

    describe('Settings Persistence', () => {
        it('should change search iterations and verify it persists', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await takeScreenshot(page, 'settings-before-change');

            // Wait for settings to load
            await delay(2000);

            // Find the search iterations setting
            // Click on Search Engines tab first
            const searchTab = await page.$('[data-tab="search"]');
            if (searchTab) {
                await searchTab.click();
                await delay(1000);
            }

            await takeScreenshot(page, 'settings-search-tab');

            // Look for iterations input
            const iterationsInput = await page.$('input[name="search.iterations"], input[data-key="search.iterations"], #search-iterations');

            if (iterationsInput) {
                // Get current value
                const currentValue = await iterationsInput.evaluate(el => el.value);
                console.log(`  Current iterations value: ${currentValue}`);

                // Change it
                const newValue = currentValue === '3' ? '5' : '3';
                await iterationsInput.click({ clickCount: 3 });
                await page.keyboard.press('Backspace');
                await iterationsInput.type(newValue);
                console.log(`  Changed to: ${newValue}`);

                // Wait for auto-save
                await delay(2000);
                await takeScreenshot(page, 'settings-after-change');

                // Reload page
                await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
                await delay(2000);

                if (searchTab) {
                    const newSearchTab = await page.$('[data-tab="search"]');
                    if (newSearchTab) await newSearchTab.click();
                    await delay(1000);
                }

                // Check if value persisted
                const persistedInput = await page.$('input[name="search.iterations"], input[data-key="search.iterations"], #search-iterations');
                if (persistedInput) {
                    const persistedValue = await persistedInput.evaluate(el => el.value);
                    console.log(`  After reload value: ${persistedValue}`);
                    await takeScreenshot(page, 'settings-after-reload');
                }
            } else {
                console.log('  Could not find iterations input, checking via API');
            }
        });

        it('should change LLM provider via dropdown and verify selection', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Click on LLM tab
            const llmTab = await page.$('[data-tab="llm"]');
            if (llmTab) {
                await llmTab.click();
                await delay(1000);
            }

            await takeScreenshot(page, 'settings-llm-tab');

            // Look for provider select or custom dropdown
            const providerSelect = await page.$('select[name="llm.provider"], select[data-key="llm.provider"]');

            if (providerSelect) {
                const options = await page.$$eval('select[name="llm.provider"] option, select[data-key="llm.provider"] option',
                    opts => opts.map(o => ({ value: o.value, text: o.textContent })));
                console.log(`  Available providers: ${JSON.stringify(options.slice(0, 5))}`);

                const currentProvider = await providerSelect.evaluate(el => el.value);
                console.log(`  Current provider: ${currentProvider}`);
            }

            // Check for custom dropdown
            const customDropdown = await page.$('.ldr-custom-dropdown[data-key*="provider"]');
            if (customDropdown) {
                console.log('  Found custom dropdown for provider');
            }

            await takeScreenshot(page, 'settings-provider-options');
        });
    });

    describe('Research Workflow - End to End', () => {
        let researchId;

        it('should start a quick research and track progress', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(2000); // Wait for page to fully load
            await takeScreenshot(page, 'research-start-page');

            // Check if we're on the research page or redirected to login
            const currentUrl = page.url();
            if (currentUrl.includes('/login')) {
                console.log('  Not logged in, skipping research test');
                return;
            }

            // Wait for query input to be available
            try {
                await page.waitForSelector('#query, textarea[name="query"]', { timeout: 10000, visible: true });
            } catch (e) {
                console.log('  Query input not found - may not be on research page');
                await takeScreenshot(page, 'research-no-query-input');
                return;
            }

            // Enter query
            const queryInput = await page.$('#query, textarea[name="query"]');
            await queryInput.click({ clickCount: 3 });
            await page.keyboard.press('Backspace');
            await queryInput.type('What is 2+2?');
            await takeScreenshot(page, 'research-query-entered');

            // Ensure quick mode is selected
            const quickMode = await page.$('#mode-quick');
            if (quickMode) {
                await quickMode.click();
            }

            // Import default settings to ensure search engines are configured
            // This is needed because new users in CI don't have settings seeded
            console.log('  Importing default settings...');
            const importResult = await page.evaluate(async (baseUrl) => {
                try {
                    // Get CSRF token from meta tag or cookie
                    const csrfMeta = document.querySelector('meta[name="csrf-token"]');
                    const csrfToken = csrfMeta ? csrfMeta.getAttribute('content') : '';

                    const res = await fetch(`${baseUrl}/settings/api/import`, {
                        method: 'POST',
                        headers: {
                            'Content-Type': 'application/json',
                            'X-CSRFToken': csrfToken
                        }
                    });
                    const body = await res.text();
                    return { status: res.status, ok: res.ok, body: body.substring(0, 200) };
                } catch (e) {
                    return { error: e.message };
                }
            }, BASE_URL);
            console.log(`  Import settings result: ${JSON.stringify(importResult)}`);

            // Set search engine to serper explicitly (env vars may not propagate to frontend)
            const searchEngineSet = await page.evaluate(() => {
                const hiddenInput = document.getElementById('search_engine_hidden');
                if (hiddenInput) {
                    hiddenInput.value = 'serper';
                    return { success: true, value: hiddenInput.value };
                }
                return { success: false, error: 'Hidden input not found' };
            });
            console.log(`  Search engine hidden input: ${JSON.stringify(searchEngineSet)}`);

            // Intercept the API request to see what's being sent
            let capturedPayload = null;
            await page.setRequestInterception(true);
            page.on('request', request => {
                if (request.url().includes('/research/api/start_research')) {
                    try {
                        capturedPayload = JSON.parse(request.postData());
                        console.log(`  API Request payload search_engine: ${capturedPayload?.search_engine}`);
                    } catch (e) {
                        console.log(`  Could not parse request: ${e.message}`);
                    }
                }
                request.continue();
            });

            // Submit research
            console.log('  Submitting research...');
            const submitBtn = await page.$('#start-research-btn, button[type="submit"]');
            if (submitBtn) {
                await submitBtn.click();
            }

            // Wait for navigation to progress page
            await delay(3000);

            const progressUrl = page.url();
            console.log(`  Progress URL: ${progressUrl}`);
            await takeScreenshot(page, 'research-progress-page');

            // Extract research ID from URL
            const match = progressUrl.match(/progress\/([a-f0-9-]+)/);
            if (match) {
                researchId = match[1];
                console.log(`  Research ID: ${researchId}`);
            }

            // Accept either progress page or staying on home (if research couldn't start)
            const isValid = progressUrl.includes('/progress') || progressUrl === `${BASE_URL}/`;
            expect(isValid).to.be.true;
        });

        it('should show progress updates on the progress page', async () => {
            if (!researchId) {
                console.log('  Skipping - no research ID from previous test');
                return;
            }

            // Check for progress elements
            const progressElements = await page.$$('.progress-bar, .ldr-progress, [class*="progress"]');
            console.log(`  Found ${progressElements.length} progress elements`);

            // Wait a bit and check for status updates
            await delay(5000);
            await takeScreenshot(page, 'research-progress-update');

            // Check for status text
            const bodyText = await page.$eval('body', el => el.textContent);
            const hasStatusInfo = bodyText.includes('research') ||
                                  bodyText.includes('progress') ||
                                  bodyText.includes('searching') ||
                                  bodyText.includes('complete');
            console.log(`  Has status info: ${hasStatusInfo}`);
        });

        it('should be viewable in history after starting', async () => {
            await page.goto(`${BASE_URL}/history`, { waitUntil: 'domcontentloaded' });
            await delay(2000);
            await takeScreenshot(page, 'history-after-research');

            // Look for any research entries
            const historyItems = await page.$$('.history-item, .research-item, [class*="history"], tr');
            console.log(`  Found ${historyItems.length} history items`);
        });

        it('should wait for research to complete and show results', async () => {
            if (!researchId) {
                console.log('  Skipping - no research ID from previous test');
                return;
            }

            // Navigate to progress page - use domcontentloaded since page does continuous polling
            try {
                await page.goto(`${BASE_URL}/progress/${researchId}`, { waitUntil: 'domcontentloaded', timeout: 15000 });
            } catch (e) {
                console.log('  Navigation timeout (expected for polling page)');
            }
            console.log(`  Monitoring research: ${researchId}`);

            // Wait for completion with timeout (max 90 seconds for quick research)
            const maxWait = 90000;
            const checkInterval = 5000;
            const startTime = Date.now();
            let completed = false;
            let lastStatus = '';

            while (Date.now() - startTime < maxWait && !completed) {
                await delay(checkInterval);

                const currentUrl = page.url();
                const bodyText = await page.$eval('body', el => el.textContent.toLowerCase());

                // Check for completion indicators
                completed = bodyText.includes('complete') ||
                            bodyText.includes('finished') ||
                            bodyText.includes('report') ||
                            currentUrl.includes('/results/') ||
                            currentUrl.includes('/report/');

                // Check for actual error state indicators set by progress.js
                const hasError = await page.evaluate(() => {
                    const progressBar = document.querySelector('#progress-bar.bg-danger');
                    const statusEl = document.querySelector('#status-text');
                    const statusText = statusEl ? statusEl.textContent.toLowerCase().trim() : '';
                    return progressBar !== null || statusText === 'error' || statusText === 'failed';
                });

                // Extract status info
                const statusMatch = bodyText.match(/(searching|processing|generating|analyzing|complete)/i);
                const currentStatus = statusMatch ? statusMatch[1] : 'unknown';

                if (currentStatus !== lastStatus) {
                    console.log(`  Status: ${currentStatus} (${Math.round((Date.now() - startTime) / 1000)}s)`);
                    lastStatus = currentStatus;
                }

                if (hasError) {
                    console.log('  ⚠ Error detected in research');
                    await takeScreenshot(page, 'research-error');
                    break;
                }

                // Take periodic screenshots
                if ((Date.now() - startTime) % 30000 < checkInterval) {
                    await takeScreenshot(page, `research-progress-${Math.round((Date.now() - startTime) / 1000)}s`);
                }
            }

            // Poll the API to confirm database status is truly "completed"
            // This bridges the gap between UI rendering and database commit timing
            if (completed) {
                const apiMaxWait = 30000;
                const apiStart = Date.now();
                let apiCompleted = false;

                while (Date.now() - apiStart < apiMaxWait && !apiCompleted) {
                    const statusRes = await page.evaluate(async (baseUrl, id) => {
                        try {
                            const res = await fetch(`${baseUrl}/api/research/${id}`);
                            const data = await res.json();
                            return data.status;
                        } catch (e) {
                            return null;
                        }
                    }, BASE_URL, researchId);

                    if (statusRes === 'completed') {
                        apiCompleted = true;
                        console.log('  API confirmed research completed');
                    } else {
                        console.log(`  Waiting for API status (currently: ${statusRes})`);
                        await delay(2000);
                    }
                }

                if (!apiCompleted) {
                    throw new Error('API did not confirm completion within 30s timeout');
                }
            }

            await takeScreenshot(page, 'research-final-state');

            const totalTime = Math.round((Date.now() - startTime) / 1000);
            console.log(`  Research completed: ${completed} (took ${totalTime}s)`);

            // If completed, verify we can see results
            if (completed) {
                const currentUrl = page.url();
                console.log(`  Final URL: ${currentUrl}`);

                // Check for result content
                const bodyText = await page.$eval('body', el => el.textContent);
                const hasResultContent = bodyText.length > 500;
                console.log(`  Has substantial content: ${hasResultContent}`);
            }
        });

        it('should export and display research output', async () => {
            if (!researchId) {
                console.log('  Skipping - no research ID from previous test');
                return;
            }

            // Navigate to the results page (not progress page)
            await page.goto(`${BASE_URL}/results/${researchId}`, { waitUntil: 'domcontentloaded' });
            await delay(3000); // Wait for content to load

            await takeScreenshot(page, 'research-results-page');

            // Read the research output from the results container
            const resultContent = await page.$eval('#results-content', el => el.textContent).catch(() => null);

            if (resultContent && resultContent.length > 100) {
                console.log('  === RESEARCH OUTPUT ===');
                // Log first 3000 chars to see actual content
                console.log(resultContent.substring(0, 3000));
                if (resultContent.length > 3000) {
                    console.log(`  ... [truncated, total ${resultContent.length} chars]`);
                }
                console.log('  === END OUTPUT ===');

                // Save research output to file for CI to include in PR comment
                const fs = require('fs');
                const outputDir = './research-output';
                if (!fs.existsSync(outputDir)) {
                    fs.mkdirSync(outputDir, { recursive: true });
                }
                fs.writeFileSync(`${outputDir}/research-result.txt`, resultContent);
                console.log('  Saved research output to research-output/research-result.txt');

                // Check for research errors
                const hasResearchError = resultContent.includes('Research Failed') ||
                                         resultContent.includes('Unable to conduct research') ||
                                         resultContent.includes('Error Type:');

                // Check specifically for search engine configuration error (known CI limitation)
                const isSearchEngineError = resultContent.includes('Unable to conduct research without a search engine');

                if (hasResearchError) {
                    console.log('  ❌ Research failed with error');
                    // Log the error for debugging
                    const errorMatch = resultContent.match(/Error.*?(?=\n\n|\n#|$)/s);
                    if (errorMatch) console.log('  Error:', errorMatch[0]);

                    if (isSearchEngineError) {
                        // This is a known CI limitation - search engines may not be fully configured
                        // for new users. We still verified that:
                        // 1. Research can be initiated
                        // 2. Research ID is assigned
                        // 3. Progress page is displayed
                        // 4. Results page is reached
                        console.log('  ⚠️ Search engine configuration issue (known CI limitation)');
                        console.log('  ✓ Verified research workflow mechanics work correctly');
                    } else {
                        // Other errors should fail the test
                        expect(hasResearchError, 'Research should not contain error messages').to.be.false;
                    }
                } else {
                    // Research succeeded - verify we got actual content
                    const hasActualContent = resultContent.includes('##') ||  // Has markdown headers
                                             resultContent.length > 500;       // Substantial content
                    console.log(`  Has actual content: ${hasActualContent}`);
                    expect(hasActualContent, 'Research should contain actual content').to.be.true;
                }
            } else {
                console.log('  No substantial content found in #results-content');
            }

            // Also get the query that was researched
            const query = await page.$eval('#result-query', el => el.textContent).catch(() => 'unknown');
            console.log(`  Research query: ${query}`);

            // Save query and metadata for CI PR comment
            const fs = require('fs');
            const outputDir = './research-output';
            if (!fs.existsSync(outputDir)) {
                fs.mkdirSync(outputDir, { recursive: true });
            }
            const metadata = {
                query: query,
                researchId: researchId,
                timestamp: new Date().toISOString(),
                hasContent: resultContent && resultContent.length > 100,
                contentLength: resultContent ? resultContent.length : 0
            };
            fs.writeFileSync(`${outputDir}/research-metadata.json`, JSON.stringify(metadata, null, 2));
            console.log('  Saved research metadata to research-output/research-metadata.json');

            // Test the Export Markdown button
            const exportBtn = await page.$('#export-markdown-btn');
            if (exportBtn) {
                console.log('  Found Export Markdown button');

                // Set up download handling
                const fs = require('fs');
                const downloadPath = '/tmp/puppeteer-downloads';
                if (!fs.existsSync(downloadPath)) {
                    fs.mkdirSync(downloadPath, { recursive: true });
                }

                // Clear any existing files
                const existingFiles = fs.readdirSync(downloadPath);
                existingFiles.forEach(f => fs.unlinkSync(`${downloadPath}/${f}`));

                // Configure download behavior
                const client = await page.target().createCDPSession();
                await client.send('Page.setDownloadBehavior', {
                    behavior: 'allow',
                    downloadPath: downloadPath
                });

                // Click export button
                await exportBtn.click();
                await delay(3000); // Wait for download

                // Check for downloaded file
                const files = fs.readdirSync(downloadPath);
                if (files.length > 0) {
                    const downloadedFile = `${downloadPath}/${files[0]}`;
                    const markdownContent = fs.readFileSync(downloadedFile, 'utf8');
                    console.log('  === EXPORTED MARKDOWN ===');
                    console.log(markdownContent.substring(0, 3000));
                    if (markdownContent.length > 3000) {
                        console.log(`  ... [truncated, total ${markdownContent.length} chars]`);
                    }
                    console.log('  === END MARKDOWN ===');

                    // Check for expected markdown structure
                    const hasTitle = markdownContent.includes('# ');
                    const hasQuery = markdownContent.includes('Research Results:') ||
                                     markdownContent.includes('Query:') ||
                                     markdownContent.includes('What is');
                    const hasTimestamp = markdownContent.includes('Generated:');

                    console.log(`  Markdown structure: title=${hasTitle}, query=${hasQuery}, timestamp=${hasTimestamp}`);

                    // Verify it's not just an error report (unless it's the known CI search engine issue)
                    const isErrorReport = markdownContent.includes('Research Failed') ||
                                          markdownContent.includes('Error Type:');
                    const isSearchEngineError = markdownContent.includes('Unable to conduct research without a search engine');

                    if (isErrorReport && isSearchEngineError) {
                        // Known CI limitation - export will contain the error report
                        console.log('  ⚠️ Export contains error (known CI limitation - search engine config)');
                    } else if (isErrorReport) {
                        expect(isErrorReport, 'Markdown export should not be an error report').to.be.false;
                    }

                    // Verify minimum content (even error reports have content)
                    expect(markdownContent.length, 'Markdown should have substantial content').to.be.greaterThan(100);
                } else {
                    console.log('  No file was downloaded (export may use clipboard instead)');
                }
            }

            await takeScreenshot(page, 'research-export-complete');

            // Verify we got meaningful output
            expect(resultContent).to.not.be.null;
            expect(resultContent.length).to.be.greaterThan(100);
        });

        it('should verify research contains sources', async () => {
            if (!researchId) {
                console.log('  Skipping - no research ID');
                return;
            }

            // Check the research API for sources
            const sourcesResponse = await page.evaluate(async (baseUrl, id) => {
                try {
                    const res = await fetch(`${baseUrl}/api/research/${id}`);
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            }, BASE_URL, researchId);

            console.log('  Research details:', JSON.stringify(sourcesResponse, null, 2).substring(0, 1000));

            // Verify research completed successfully
            if (sourcesResponse.status) {
                expect(sourcesResponse.status, 'Research status should be completed').to.equal('completed');
            }

            // Check for sources in the response or page
            const pageContent = await page.$eval('body', el => el.textContent);
            const hasSources = pageContent.includes('Source') ||
                               pageContent.includes('Reference') ||
                               pageContent.includes('http') ||
                               pageContent.includes('www.');
            console.log(`  Has sources/references: ${hasSources}`);
        });

        it('should verify search was actually performed', async () => {
            if (!researchId) {
                console.log('  Skipping - no research ID');
                return;
            }

            // Get research logs to verify search happened
            const logsResponse = await page.evaluate(async (baseUrl, id) => {
                try {
                    const res = await fetch(`${baseUrl}/api/research/${id}/logs`);
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            }, BASE_URL, researchId);

            if (logsResponse.logs || logsResponse.entries) {
                const logsText = JSON.stringify(logsResponse);
                console.log('  Logs preview:', logsText.substring(0, 500));

                // Check for search-related log entries
                const searchPerformed = logsText.toLowerCase().includes('search') ||
                                        logsText.toLowerCase().includes('wikipedia') ||
                                        logsText.includes('results') ||
                                        logsText.includes('query');
                console.log(`  Search performed: ${searchPerformed}`);

                // Check for LLM activity
                const llmUsed = logsText.toLowerCase().includes('generating') ||
                                logsText.toLowerCase().includes('openrouter') ||
                                logsText.toLowerCase().includes('gemini') ||
                                logsText.toLowerCase().includes('model');
                console.log(`  LLM used: ${llmUsed}`);
            } else {
                console.log('  No logs available:', JSON.stringify(logsResponse).substring(0, 200));
            }
        });
    });


    describe('Research API Workflow', () => {
        it('should start a research task and verify it in history', async () => {
            console.log('\n--- Test: Start research via API and verify in history ---');

            // Navigate to home page to have a valid page context
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });

            // Start research via API (CSRF-exempt under /research/api/, session cookie auto-sent)
            const startResult = await page.evaluate(async (baseUrl) => {
                try {
                    const res = await fetch(`${baseUrl}/research/api/start`, {
                        method: 'POST',
                        headers: { 'Content-Type': 'application/json' },
                        body: JSON.stringify({
                            query: 'What is 2+2?',
                            mode: 'quick',
                            model_provider: 'openrouter',
                            model: 'google/gemini-2.0-flash-001',
                            search_engine: 'serper'
                        })
                    });
                    const text = await res.text();
                    return { status: res.status, body: text.substring(0, 500) };
                } catch (e) {
                    return { error: e.message };
                }
            }, BASE_URL);

            console.log('Start research result:', JSON.stringify(startResult, null, 2));
            expect(startResult.error).to.be.undefined;
            expect(startResult.status).to.equal(200);

            // Extract research ID
            const startData = JSON.parse(startResult.body);
            const researchId = startData.research_id;
            expect(researchId).to.be.a('string');
            console.log(`  Research ID: ${researchId}`);

            // Verify it appears in history
            await delay(2000);
            const historyResult = await page.evaluate(async (baseUrl) => {
                try {
                    const res = await fetch(`${baseUrl}/api/history`);
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            }, BASE_URL);

            expect(historyResult.status).to.equal(200);
            const historyData = JSON.parse(historyResult.body);
            const found = historyData.items && historyData.items.some(item => item.id === researchId);
            console.log(`  Research found in history: ${found}`);
            expect(found).to.be.true;

            // Brief check for status progression
            await delay(5000);
            const statusResult = await page.evaluate(async (baseUrl, id) => {
                try {
                    const res = await fetch(`${baseUrl}/api/research/${id}/status`);
                    const data = await res.json();
                    return { status: res.status, research_status: data.status };
                } catch (e) {
                    return { error: e.message };
                }
            }, BASE_URL, researchId);

            console.log(`  Research status: ${statusResult.research_status}`);
            // Accept any valid ResearchStatus — mirrors the 8-member enum in constants.py
            const validStatuses = ['queued', 'in_progress', 'completed', 'error', 'pending', 'suspended', 'failed', 'cancelled'];
            expect(validStatuses).to.include(statusResult.research_status);

            // Terminate research to avoid side effects on subsequent tests
            // /api/terminate/{id} is NOT CSRF-exempt, so we need the CSRF token from meta tag
            const csrfForTerminate = await page.$eval('meta[name="csrf-token"]', el => el.content).catch(() => null);
            if (csrfForTerminate) {
                await page.evaluate(async (baseUrl, id, csrf) => {
                    try {
                        await fetch(`${baseUrl}/api/terminate/${id}`, {
                            method: 'POST',
                            headers: { 'X-CSRFToken': csrf }
                        });
                    } catch (e) {
                        // Ignore cleanup errors
                    }
                }, BASE_URL, researchId, csrfForTerminate);
                console.log('  Research terminated for cleanup');
            } else {
                console.log('  Could not get CSRF token for cleanup - research will be cleaned up on browser close');
            }
        });
    });

    describe('News Subscription Creation', () => {
        it('should navigate to new subscription form', async () => {
            await page.goto(`${BASE_URL}/news/subscriptions/new`, { waitUntil: 'domcontentloaded' });
            await takeScreenshot(page, 'subscription-form');

            const url = page.url();
            expect(url).to.include('/subscriptions/new');

            // Check for form elements
            const form = await page.$('form');
            expect(form).to.not.be.null;
            console.log('  ✓ Subscription form found');
        });

        it('should fill out subscription form fields', async () => {
            // Look for name/title input
            const nameInput = await page.$('input[name="name"], input[name="title"], input#name, input#title');
            if (nameInput) {
                await nameInput.click({ clickCount: 3 });
                await nameInput.type('Test Subscription ' + Date.now());
                console.log('  ✓ Filled name field');
            }

            // Look for topic/query input
            const topicInput = await page.$('input[name="topic"], input[name="query"], textarea[name="query"], input#topic');
            if (topicInput) {
                await topicInput.click({ clickCount: 3 });
                await topicInput.type('artificial intelligence');
                console.log('  ✓ Filled topic field');
            }

            await takeScreenshot(page, 'subscription-form-filled');

            // Look for schedule options
            const scheduleOptions = await page.$$('select[name="schedule"], input[name="schedule"], [name*="frequency"]');
            console.log(`  Found ${scheduleOptions.length} schedule options`);
        });

        it('should show subscription list page', async () => {
            await page.goto(`${BASE_URL}/news/subscriptions`, { waitUntil: 'domcontentloaded' });
            await takeScreenshot(page, 'subscriptions-list');

            const url = page.url();
            expect(url).to.include('/subscriptions');

            // Check for any subscription items or empty state
            const bodyText = await page.$eval('body', el => el.textContent);
            const hasContent = bodyText.includes('subscription') || bodyText.includes('Subscription') || bodyText.includes('No');
            console.log(`  Has subscription content: ${hasContent}`);
        });

        it('should create a new subscription and verify it appears in list', async () => {
            // Navigate to subscription create page
            await page.goto(`${BASE_URL}/news/subscriptions/new`, { waitUntil: 'domcontentloaded' });
            await delay(2000); // Wait for form JS to initialize
            await takeScreenshot(page, 'subscription-create-form');

            const subName = `Test Subscription ${TEST_RUN_ID}`;
            console.log(`  Creating subscription: ${subName}`);

            // Wait for form to be ready
            try {
                await page.waitForSelector('#subscription-query', { timeout: 5000, visible: true });
            } catch (e) {
                console.log('  Subscription query input not found');
                await takeScreenshot(page, 'subscription-form-not-found');
                return;
            }

            // Fill required query field
            await page.type('#subscription-query', 'artificial intelligence breakthroughs machine learning');
            console.log('  ✓ Filled query field');

            // Fill name field
            const nameInput = await page.$('#subscription-name');
            if (nameInput) {
                await page.type('#subscription-name', subName);
                console.log('  ✓ Filled name field');
            }

            // Set interval to daily (1440 minutes)
            const intervalInput = await page.$('#subscription-interval');
            if (intervalInput) {
                await intervalInput.click({ clickCount: 3 });
                await page.keyboard.press('Backspace');
                await intervalInput.type('1440');
                console.log('  ✓ Set interval to 1440 (daily)');
            }

            await takeScreenshot(page, 'subscription-form-filled');

            // Submit the form - look for submit button
            const submitBtn = await page.$('button[type="submit"], .btn-primary[type="submit"]');
            if (submitBtn) {
                console.log('  Clicking submit button...');
                await submitBtn.click();

                // Wait for response
                await delay(3000);
                await takeScreenshot(page, 'subscription-after-submit');

                const currentUrl = page.url();
                console.log(`  After submit URL: ${currentUrl}`);

                // Check for success indicators
                const bodyText = await page.$eval('body', el => el.textContent.toLowerCase());
                const hasSuccess = bodyText.includes('success') ||
                                   bodyText.includes('created') ||
                                   currentUrl.includes('/subscriptions') && !currentUrl.includes('/new');
                console.log(`  Creation success indicators: ${hasSuccess}`);
            } else {
                console.log('  Submit button not found');
            }

            // Verify subscription appears in list
            await page.goto(`${BASE_URL}/news/subscriptions`, { waitUntil: 'domcontentloaded' });
            await delay(2000);
            await takeScreenshot(page, 'subscriptions-list-after-create');

            const bodyText = await page.$eval('body', el => el.textContent);
            const foundName = bodyText.includes(subName) || bodyText.includes('Test Subscription');
            const foundQuery = bodyText.includes('artificial intelligence') || bodyText.includes('machine learning');
            console.log(`  Subscription name found: ${foundName}`);
            console.log(`  Subscription query found: ${foundQuery}`);
        });
    });

    describe('Library Collection Management', () => {
        it('should navigate to collections page', async () => {
            await page.goto(`${BASE_URL}/library/collections`, { waitUntil: 'domcontentloaded' });
            await takeScreenshot(page, 'collections-page');

            const url = page.url();
            expect(url).to.include('/collections');
        });

        it('should show create collection button or form', async () => {
            // Look for create button
            const createBtn = await page.$('button[onclick*="create"], a[href*="create"], .create-collection, #create-collection');
            if (createBtn) {
                console.log('  ✓ Found create collection button');
                await takeScreenshot(page, 'collections-create-btn');
            }

            // Or look for inline form
            const nameInput = await page.$('input[name="collection_name"], input#collection-name, input[placeholder*="collection"]');
            if (nameInput) {
                console.log('  ✓ Found collection name input');
            }
        });

        it('should list existing collections with document counts', async () => {
            await page.goto(`${BASE_URL}/library/`, { waitUntil: 'domcontentloaded' });
            await takeScreenshot(page, 'library-with-collections');

            // Check collection dropdown
            const collectionSelect = await page.$('#filter-collection');
            if (collectionSelect) {
                const options = await page.$$eval('#filter-collection option',
                    opts => opts.map(o => ({ value: o.value, text: o.textContent.trim() })));
                console.log(`  Collections: ${JSON.stringify(options)}`);
                expect(options.length).to.be.greaterThan(0);
            }
        });

        it('should create a new collection and verify it appears', async () => {
            // Navigate to create page
            await page.goto(`${BASE_URL}/library/collections/create`, { waitUntil: 'domcontentloaded' });
            await takeScreenshot(page, 'collection-create-form');

            const collectionName = `Test Collection ${TEST_RUN_ID}`;
            console.log(`  Creating collection: ${collectionName}`);

            // Wait for form to be ready
            try {
                await page.waitForSelector('#collection-name', { timeout: 5000, visible: true });
            } catch (e) {
                console.log('  Collection name input not found');
                await takeScreenshot(page, 'collection-form-not-found');
                return;
            }

            // Fill the form
            await page.type('#collection-name', collectionName);
            console.log('  ✓ Filled collection name');

            const descInput = await page.$('#collection-description');
            if (descInput) {
                await page.type('#collection-description', 'Automated test collection created by Puppeteer tests');
                console.log('  ✓ Filled description');
            }

            await takeScreenshot(page, 'collection-form-filled');

            // Submit the form
            const createBtn = await page.$('#create-collection-btn');
            if (createBtn) {
                console.log('  Clicking create button...');
                await createBtn.click();

                // Wait for response
                await delay(3000);
                await takeScreenshot(page, 'collection-after-submit');

                const currentUrl = page.url();
                console.log(`  After create URL: ${currentUrl}`);

                // Check for success - might redirect to collection page or show success message
                const bodyText = await page.$eval('body', el => el.textContent.toLowerCase());
                const hasSuccess = bodyText.includes('success') ||
                                   bodyText.includes('created') ||
                                   currentUrl.includes('/collections/') ||
                                   !currentUrl.includes('/create');
                console.log(`  Creation success indicators: ${hasSuccess}`);
            }

            // Verify collection appears in library dropdown
            await page.goto(`${BASE_URL}/library/`, { waitUntil: 'domcontentloaded' });
            await delay(1000);
            await takeScreenshot(page, 'library-after-collection-create');

            const collectionSelect = await page.$('#filter-collection');
            if (collectionSelect) {
                const options = await page.$$eval('#filter-collection option',
                    opts => opts.map(o => o.textContent.trim()));
                const found = options.some(o => o.includes('Test Collection'));
                console.log(`  Collection found in dropdown: ${found}`);
                console.log(`  Available collections: ${JSON.stringify(options)}`);
            }
        });
    });

    describe('Ollama Configuration', () => {
        it('should show Ollama URL in settings', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Click LLM tab
            const llmTab = await page.$('[data-tab="llm"]');
            if (llmTab) {
                await llmTab.click();
                await delay(1000);
            }

            await takeScreenshot(page, 'settings-ollama-section');

            // Search for ollama in settings
            const searchInput = await page.$('#settings-search');
            if (searchInput) {
                await searchInput.type('ollama');
                await delay(1000);
                await takeScreenshot(page, 'settings-ollama-search');
            }

            // Look for Ollama URL input
            const ollamaInput = await page.$('input[name*="ollama"], input[data-key*="ollama"], input[placeholder*="ollama"], input[placeholder*="11434"]');
            if (ollamaInput) {
                const value = await ollamaInput.evaluate(el => el.value || el.placeholder);
                console.log(`  Ollama URL setting: ${value}`);
            }
        });

        it('should test Ollama connection status endpoint', async () => {
            // Make sure we're on settings page first
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            // This tests the SSRF-protected endpoint
            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/settings/api/ollama/status', {
                        method: 'GET',
                        credentials: 'include'
                    });
                    return {
                        status: res.status,
                        ok: res.ok,
                        body: await res.text()
                    };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Ollama status endpoint: ${JSON.stringify(response)}`);
            // Endpoint should respond (even if Ollama isn't running) - accept 401 if not logged in
            expect(response.status).to.be.oneOf([200, 401, 404, 500]);
        });
    });

    describe('API Endpoints Verification', () => {
        beforeEach(async () => {
            // Make sure we're on a page (for cookies to work)
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(1000);
        });

        it('should get settings via API', async () => {
            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/settings/api/settings', {
                        credentials: 'include'
                    });
                    const data = await res.json();
                    return {
                        status: res.status,
                        hasData: Object.keys(data).length > 0,
                        sampleKeys: Object.keys(data).slice(0, 5)
                    };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Settings API response: ${JSON.stringify(response)}`);
            // Accept 200, 401, or 404 (endpoint may have different structure)
            expect(response.status).to.be.oneOf([200, 401, 404]);
            if (response.status === 200) {
                expect(response.hasData).to.be.true;
            }
        });

        it('should get available search engines via API', async () => {
            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/settings/api/available-search-engines', {
                        credentials: 'include'
                    });
                    const data = await res.json();
                    return {
                        status: res.status,
                        engines: Array.isArray(data) ? data.length : 'not array',
                        sample: Array.isArray(data) ? data.slice(0, 3) : data
                    };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Search engines API: ${JSON.stringify(response)}`);
            expect(response.status).to.be.oneOf([200, 401]);
        });

        it('should get available model providers via API', async () => {
            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/settings/api/available-model-providers', {
                        credentials: 'include'
                    });
                    const data = await res.json();
                    return {
                        status: res.status,
                        providers: Array.isArray(data) ? data.map(p => p.name || p) : 'not array'
                    };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Model providers API: ${JSON.stringify(response)}`);
            expect(response.status).to.be.oneOf([200, 401, 404]);
        });

        it('should handle research history API', async () => {
            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history', {
                        credentials: 'include'
                    });
                    const data = await res.json();
                    return {
                        status: res.status,
                        isArray: Array.isArray(data),
                        count: Array.isArray(data) ? data.length : 0,
                        hasData: typeof data === 'object'
                    };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  History API: ${JSON.stringify(response)}`);
            expect(response.status).to.be.oneOf([200, 401, 404]);
            // Data structure may vary - just check we got some response
            expect(response.hasData).to.be.true;
        });
    });

    describe('Download Manager', () => {
        it('should load download manager page', async () => {
            await page.goto(`${BASE_URL}/library/downloads`, { waitUntil: 'domcontentloaded' });
            await takeScreenshot(page, 'download-manager');

            const url = page.url();
            // May redirect to login if not authenticated, or to downloads
            const isValid = url.includes('/downloads') || url.includes('/login') || url.includes('/library');
            expect(isValid).to.be.true;
            console.log(`  Download manager URL: ${url}`);
        });

        it('should show download queue or status', async () => {
            // Navigate to library first (more reliable)
            await page.goto(`${BASE_URL}/library/`, { waitUntil: 'domcontentloaded' });

            // Look for download-related elements
            const queueElements = await page.$$('.download-queue, .queue-item, [class*="download"], table, .library-container');
            console.log(`  Found ${queueElements.length} download/library elements`);

            await takeScreenshot(page, 'download-queue');
        });
    });

    describe('Error Handling', () => {
        it('should gracefully handle invalid research ID', async () => {
            try {
                await page.goto(`${BASE_URL}/progress/invalid-id-12345`, { waitUntil: 'domcontentloaded', timeout: 15000 });
            } catch (e) {
                // Timeout is acceptable - page may be polling
                console.log('  Navigation timeout (expected for polling page)');
            }
            await takeScreenshot(page, 'invalid-research-id');

            // Should not crash, should show error or redirect
            const bodyText = await page.$eval('body', el => el.textContent);
            const hasContent = bodyText.length > 20;
            expect(hasContent).to.be.true;
            console.log('  ✓ Invalid research ID handled gracefully');
        });

        it('should handle invalid API requests', async () => {
            // Make sure we're on a valid page first
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded', timeout: 15000 });

            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/research/invalid-id-xyz/status', {
                        credentials: 'include'
                    });
                    return {
                        status: res.status,
                        body: await res.text()
                    };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Invalid API request response: ${JSON.stringify(response)}`);
            // Should return error code, not crash - accept 401 if not logged in
            expect(response.status).to.be.oneOf([401, 404, 400, 500]);
        });
    });

    describe('Metrics and Analytics', () => {
        it('should load metrics page', async () => {
            try {
                await page.goto(`${BASE_URL}/metrics`, { waitUntil: 'domcontentloaded', timeout: 15000 });
            } catch (e) {
                console.log('  Metrics page navigation timeout');
            }
            await takeScreenshot(page, 'metrics-page');

            const url = page.url();
            // May redirect or show metrics
            console.log(`  Metrics page URL: ${url}`);
        });

        it('should load benchmark page', async () => {
            try {
                await page.goto(`${BASE_URL}/benchmark`, { waitUntil: 'domcontentloaded', timeout: 15000 });
            } catch (e) {
                console.log('  Benchmark page navigation timeout');
            }
            await takeScreenshot(page, 'benchmark-page');

            const url = page.url();
            console.log(`  Benchmark page URL: ${url}`);

            // Just check page loaded, content may vary
            const bodyText = await page.$eval('body', el => el.textContent.toLowerCase());
            const hasContent = bodyText.length > 20;
            expect(hasContent).to.be.true;
        });
    });

    describe('History Page Tests', () => {
        it('should load history page', async () => {
            await page.goto(`${BASE_URL}/history`, { waitUntil: 'domcontentloaded' });
            await takeScreenshot(page, 'history-page');

            const url = page.url();
            expect(url).to.include('/history');
            console.log(`  History page loaded: ${url}`);
        });

        it('should display research history items or empty state', async () => {
            await page.goto(`${BASE_URL}/history`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const bodyText = await page.$eval('body', el => el.textContent);
            // Should show history items or empty state message
            const hasContent = bodyText.includes('research') ||
                              bodyText.includes('Research') ||
                              bodyText.includes('history') ||
                              bodyText.includes('No') ||
                              bodyText.includes('empty');
            console.log(`  Has history content: ${hasContent}`);
            expect(hasContent).to.be.true;
        });

        it('should have search/filter functionality', async () => {
            await page.goto(`${BASE_URL}/history`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            // Look for search input
            const searchInput = await page.$('input[type="search"], input[placeholder*="search"], input[placeholder*="Search"], .search-input, #search');
            if (searchInput) {
                await searchInput.type('test query');
                console.log('  ✓ Search input found and usable');
                await delay(500);
            } else {
                console.log('  No search input found on history page');
            }

            // Look for filter options
            const filters = await page.$$('select, [class*="filter"], button[class*="filter"]');
            console.log(`  Found ${filters.length} filter elements`);

            await takeScreenshot(page, 'history-with-search');
        });

        it('should handle pagination if present', async () => {
            await page.goto(`${BASE_URL}/history`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            // Look for pagination elements
            const pagination = await page.$$('.pagination, [class*="page"], nav[aria-label*="pagination"], .pager');
            console.log(`  Found ${pagination.length} pagination elements`);

            // Look for next/prev buttons
            const pageButtons = await page.$$('button[class*="page"], a[class*="page"], [aria-label*="page"]');
            console.log(`  Found ${pageButtons.length} page buttons`);

            await takeScreenshot(page, 'history-pagination');
        });
    });

    describe('Settings Deep Interaction Tests', () => {
        it('should navigate between all settings tabs', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Get all tabs
            const tabs = await page.$$('[data-tab], .tab, [role="tab"]');
            console.log(`  Found ${tabs.length} settings tabs`);

            // Click through each tab
            for (let i = 0; i < Math.min(tabs.length, 5); i++) {
                try {
                    await tabs[i].click();
                    await delay(500);
                    const tabName = await tabs[i].evaluate(el => el.textContent || el.getAttribute('data-tab'));
                    console.log(`    ✓ Clicked tab: ${tabName}`);
                } catch (e) {
                    console.log(`    Tab ${i} not clickable`);
                }
            }
            await takeScreenshot(page, 'settings-all-tabs');
        });

        it('should use settings search functionality', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const searchInput = await page.$('#settings-search, input[placeholder*="search"], .search-input');
            if (searchInput) {
                // Search for a common setting
                await searchInput.type('model');
                await delay(1000);
                await takeScreenshot(page, 'settings-search-model');

                // Clear and search again
                await searchInput.click({ clickCount: 3 });
                await page.keyboard.press('Backspace');
                await searchInput.type('api');
                await delay(1000);
                await takeScreenshot(page, 'settings-search-api');

                console.log('  ✓ Settings search working');
            } else {
                console.log('  No settings search input found');
            }
        });

        it('should show tooltips or help text for settings', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Look for help icons or tooltips
            const helpElements = await page.$$('[title], [data-tooltip], .tooltip, [aria-describedby], .help-icon, .info-icon, [class*="help"]');
            console.log(`  Found ${helpElements.length} help/tooltip elements`);

            // Try to hover over a help icon to trigger tooltip
            if (helpElements.length > 0) {
                await helpElements[0].hover();
                await delay(500);
                await takeScreenshot(page, 'settings-tooltip');
            }
        });

        it('should handle form validation on settings', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Find a numeric input
            const numericInput = await page.$('input[type="number"]');
            if (numericInput) {
                const originalValue = await numericInput.evaluate(el => el.value);
                console.log(`  Original value: ${originalValue}`);

                // Try to enter invalid value
                await numericInput.click({ clickCount: 3 });
                await numericInput.type('-999999');
                await delay(1000);

                // Check for validation message
                const validation = await page.$('.error, .invalid, [class*="error"], .validation-message');
                if (validation) {
                    console.log('  ✓ Validation message shown');
                }

                // Restore original
                await numericInput.click({ clickCount: 3 });
                await numericInput.type(originalValue || '5');
                await delay(500);
            }
            await takeScreenshot(page, 'settings-validation');
        });
    });

    describe('Research Advanced Features', () => {
        it('should show research mode options', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Look for mode selection
            const modes = await page.$$('#mode-quick, #mode-detailed, [name="mode"], .mode-selector input');
            console.log(`  Found ${modes.length} research mode options`);
            expect(modes.length).to.be.greaterThan(0);

            // Get mode labels
            const modeLabels = await page.$$eval('label[for*="mode"], .mode-label',
                els => els.map(el => el.textContent.trim()));
            console.log(`  Mode labels: ${JSON.stringify(modeLabels)}`);

            await takeScreenshot(page, 'research-modes');
        });

        it('should show strategy selection options', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Look for strategy options
            const strategySelect = await page.$('#strategy, select[name="strategy"], [class*="strategy"]');
            if (strategySelect) {
                const options = await page.$$eval('#strategy option, select[name="strategy"] option',
                    opts => opts.map(o => ({ value: o.value, text: o.textContent.trim() })));
                console.log(`  Strategy options: ${JSON.stringify(options)}`);
                expect(options.length).to.be.greaterThan(0);
            } else {
                console.log('  No strategy selector found');
            }

            await takeScreenshot(page, 'research-strategy');
        });

        it('should show model provider selection', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const providerSelect = await page.$('#model-provider, select[name="model_provider"], .provider-select');
            if (providerSelect) {
                const options = await page.$$eval('#model-provider option, select[name="model_provider"] option',
                    opts => opts.map(o => ({ value: o.value, text: o.textContent.trim() })));
                console.log(`  Provider options: ${JSON.stringify(options.slice(0, 5))}`);
            }

            await takeScreenshot(page, 'research-providers');
        });

        it('should show iterations and questions per iteration controls', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Look for iterations input
            const iterationsInput = await page.$('#iterations, input[name="iterations"]');
            if (iterationsInput) {
                const value = await iterationsInput.evaluate(el => el.value);
                console.log(`  Iterations value: ${value}`);
            }

            // Look for questions per iteration
            const questionsInput = await page.$('#questions-per-iteration, input[name="questions_per_iteration"]');
            if (questionsInput) {
                const value = await questionsInput.evaluate(el => el.value);
                console.log(`  Questions per iteration: ${value}`);
            }

            await takeScreenshot(page, 'research-iterations');
        });
    });

    describe('Additional API Tests', () => {
        beforeEach(async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(500);
        });

        it('should get categories via API', async () => {
            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/settings/api/categories', { credentials: 'include' });
                    const data = await res.json();
                    return { status: res.status, categories: data };
                } catch (e) {
                    return { error: e.message };
                }
            });
            console.log(`  Categories API: ${JSON.stringify(response).substring(0, 200)}`);
            expect(response.status).to.be.oneOf([200, 401, 404]);
        });

        it('should get rate limiting info via API', async () => {
            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/settings/api/rate-limiting/stats', { credentials: 'include' });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            });
            console.log(`  Rate limiting API: status=${response.status}`);
            expect(response.status).to.be.oneOf([200, 401, 404, 500]);
        });

        it('should get library collections via API', async () => {
            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/library/api/collections', { credentials: 'include' });
                    const data = await res.json();
                    return { status: res.status, count: Array.isArray(data) ? data.length : 'not array', sample: data };
                } catch (e) {
                    return { error: e.message };
                }
            });
            console.log(`  Collections API: ${JSON.stringify(response).substring(0, 300)}`);
            expect(response.status).to.be.oneOf([200, 401, 404]);
        });

        it('should get news subscriptions via API', async () => {
            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/news/api/subscriptions/current', { credentials: 'include' });
                    const data = await res.json();
                    return { status: res.status, data: data };
                } catch (e) {
                    return { error: e.message };
                }
            });
            console.log(`  Subscriptions API: ${JSON.stringify(response).substring(0, 200)}`);
            expect(response.status).to.be.oneOf([200, 401, 404]);
        });

        it('should handle metrics API', async () => {
            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/metrics', { credentials: 'include' });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            });
            console.log(`  Metrics API: status=${response.status}`);
            expect(response.status).to.be.oneOf([200, 401, 404, 500]);
        });
    });

    describe('Edge Cases and Input Validation', () => {
        it('should handle very long query input', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const queryInput = await page.$('#query, textarea[name="query"]');
            if (queryInput) {
                // Generate a very long query
                const longQuery = 'This is a test query. '.repeat(100);
                await queryInput.type(longQuery);
                await delay(500);

                const value = await queryInput.evaluate(el => el.value);
                console.log(`  Long query length: ${value.length}`);

                // Check if there's a character limit warning
                const warning = await page.$('.warning, .error, [class*="limit"], [class*="warning"]');
                if (warning) {
                    console.log('  Character limit warning displayed');
                }

                await takeScreenshot(page, 'long-query-input');
            }
        });

        it('should handle special characters in query', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const queryInput = await page.$('#query, textarea[name="query"]');
            if (queryInput) {
                await queryInput.click({ clickCount: 3 });
                await page.keyboard.press('Backspace');

                // Test special characters
                const specialQuery = '<script>alert("test")</script> & "quotes" \'apostrophe\' 日本語 emoji: 🔬';
                await queryInput.type(specialQuery);

                const value = await queryInput.evaluate(el => el.value);
                console.log(`  Special chars preserved: ${value.includes('🔬')}`);

                await takeScreenshot(page, 'special-chars-query');
            }
        });

        it('should handle empty form submission', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Try to submit without query
            const submitBtn = await page.$('#submit-btn, button[type="submit"], .submit-button');
            if (submitBtn) {
                // Clear any existing query
                const queryInput = await page.$('#query, textarea[name="query"]');
                if (queryInput) {
                    await queryInput.click({ clickCount: 3 });
                    await page.keyboard.press('Backspace');
                }

                await submitBtn.click();
                await delay(1000);

                // Check for validation error
                const error = await page.$('.error, .validation-error, [class*="error"], .invalid-feedback');
                if (error) {
                    const errorText = await error.evaluate(el => el.textContent);
                    console.log(`  Validation error shown: ${errorText}`);
                }

                await takeScreenshot(page, 'empty-submission');
            }
        });

        it('should handle rapid navigation', async () => {
            // Test rapid navigation between pages
            const urls = [
                `${BASE_URL}/`,
                `${BASE_URL}/settings`,
                `${BASE_URL}/history`,
                `${BASE_URL}/library/`,
                `${BASE_URL}/`
            ];

            for (const url of urls) {
                await page.goto(url, { waitUntil: 'domcontentloaded' });
            }

            // Should end up on home page without errors
            const finalUrl = page.url();
            console.log(`  Final URL after rapid nav: ${finalUrl}`);
            expect(finalUrl).to.include(BASE_URL);

            await takeScreenshot(page, 'rapid-navigation');
        });

        it('should handle browser back/forward navigation', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await page.goto(`${BASE_URL}/history`, { waitUntil: 'domcontentloaded' });

            // Go back twice
            await page.goBack();
            await delay(1000);
            const afterBack1 = page.url();
            console.log(`  After first back: ${afterBack1}`);

            await page.goBack();
            await delay(1000);
            const afterBack2 = page.url();
            console.log(`  After second back: ${afterBack2}`);

            // Go forward
            await page.goForward();
            await delay(1000);
            const afterForward = page.url();
            console.log(`  After forward: ${afterForward}`);

            await takeScreenshot(page, 'back-forward-nav');
        });
    });

    describe('Responsive Design Tests', () => {
        it('should render correctly on mobile viewport', async () => {
            await page.setViewport({ width: 375, height: 667 }); // iPhone SE
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            await takeScreenshot(page, 'mobile-home');

            // Check for mobile menu or hamburger
            const mobileMenu = await page.$('.mobile-menu, .hamburger, [class*="mobile"], .navbar-toggler, .menu-toggle');
            console.log(`  Mobile menu found: ${mobileMenu !== null}`);

            // Reset viewport
            await page.setViewport({ width: 1400, height: 900 });
        });

        it('should render settings on tablet viewport', async () => {
            await page.setViewport({ width: 768, height: 1024 }); // iPad
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            await takeScreenshot(page, 'tablet-settings');

            // Reset viewport
            await page.setViewport({ width: 1400, height: 900 });
        });
    });

    describe('Accessibility Basic Tests', () => {
        it('should have page title', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            const title = await page.title();
            console.log(`  Page title: ${title}`);
            expect(title.length).to.be.greaterThan(0);
        });

        it('should have form labels', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            const labels = await page.$$('label');
            console.log(`  Found ${labels.length} form labels`);

            // Check if inputs have associated labels
            const inputsWithLabels = await page.$$eval('input[id], textarea[id]', inputs => {
                return inputs.map(input => {
                    const label = document.querySelector(`label[for="${input.id}"]`);
                    return { id: input.id, hasLabel: label !== null };
                });
            });
            console.log(`  Inputs with labels: ${JSON.stringify(inputsWithLabels.slice(0, 5))}`);
        });

        it('should have alt text on images', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });

            const images = await page.$$eval('img', imgs => {
                return imgs.map(img => ({
                    src: img.src.substring(img.src.lastIndexOf('/') + 1),
                    hasAlt: img.hasAttribute('alt'),
                    alt: img.alt
                }));
            });
            console.log(`  Found ${images.length} images`);
            if (images.length > 0) {
                const withAlt = images.filter(i => i.hasAlt).length;
                console.log(`  Images with alt: ${withAlt}/${images.length}`);
            }
        });

        it('should be keyboard navigable', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            // Tab through elements
            for (let i = 0; i < 10; i++) {
                await page.keyboard.press('Tab');
            }

            // Get currently focused element
            const focused = await page.evaluate(() => {
                const el = document.activeElement;
                return {
                    tag: el.tagName,
                    id: el.id,
                    class: el.className
                };
            });
            console.log(`  After 10 tabs, focused on: ${JSON.stringify(focused)}`);

            await takeScreenshot(page, 'keyboard-navigation');
        });
    });

    describe('Session and State Tests', () => {
        it('should maintain state after page refresh', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            // Enter something in query
            const queryInput = await page.$('#query, textarea[name="query"]');
            if (queryInput) {
                await queryInput.type('Test query for state');
            }

            // Check if logged in
            const beforeRefresh = await page.evaluate(() => {
                return {
                    hasSession: document.cookie.includes('session'),
                    url: window.location.href
                };
            });
            console.log(`  Before refresh: ${JSON.stringify(beforeRefresh)}`);

            // Refresh
            await page.reload({ waitUntil: 'domcontentloaded' });
            await delay(1000);

            const afterRefresh = await page.evaluate(() => {
                return {
                    hasSession: document.cookie.includes('session'),
                    url: window.location.href
                };
            });
            console.log(`  After refresh: ${JSON.stringify(afterRefresh)}`);

            // Should still be on same page
            expect(afterRefresh.url).to.include(BASE_URL);
        });

        it('should handle concurrent API calls', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });

            // Make multiple concurrent API calls
            const results = await page.evaluate(async () => {
                const calls = [
                    fetch('/settings/api/settings', { credentials: 'include' }),
                    fetch('/api/history', { credentials: 'include' }),
                    fetch('/settings/api/categories', { credentials: 'include' })
                ];

                try {
                    const responses = await Promise.all(calls);
                    return responses.map(r => ({ status: r.status, ok: r.ok }));
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Concurrent API results: ${JSON.stringify(results)}`);
            expect(Array.isArray(results)).to.be.true;
        });
    });

    describe('Authentication Tests', () => {
        it('should reject login with invalid credentials', async () => {
            // First logout if logged in
            await page.goto(`${BASE_URL}/logout`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            await page.goto(`${BASE_URL}/login`, { waitUntil: 'domcontentloaded' });
            await takeScreenshot(page, 'login-page-for-invalid');

            const usernameInput = await page.$('input[name="username"], #username');
            const passwordInput = await page.$('input[name="password"], #password');

            if (usernameInput && passwordInput) {
                await usernameInput.type('invalid_user_xyz');
                await passwordInput.type('wrong_password_123');

                const submitBtn = await page.$('button[type="submit"], input[type="submit"]');
                if (submitBtn) {
                    await submitBtn.click();
                    await delay(2000);
                }

                const currentUrl = page.url();
                const bodyText = await page.$eval('body', el => el.textContent.toLowerCase());

                // Should still be on login page or show error
                const hasError = bodyText.includes('invalid') ||
                                 bodyText.includes('incorrect') ||
                                 bodyText.includes('error') ||
                                 bodyText.includes('failed') ||
                                 currentUrl.includes('/login');
                console.log(`  Login rejected: ${hasError}`);
                expect(hasError).to.be.true;
            }
            await takeScreenshot(page, 'login-invalid-creds');

            // Re-login with valid credentials for remaining tests
            await ensureLoggedIn(page, TEST_USERNAME, TEST_PASSWORD);
        });

        it('should show error message for wrong password', async () => {
            await page.goto(`${BASE_URL}/logout`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            await page.goto(`${BASE_URL}/login`, { waitUntil: 'domcontentloaded' });

            const usernameInput = await page.$('input[name="username"], #username');
            const passwordInput = await page.$('input[name="password"], #password');

            if (usernameInput && passwordInput) {
                // Use existing username but wrong password
                await usernameInput.type(TEST_USERNAME);
                await passwordInput.type('definitely_wrong_password');

                const submitBtn = await page.$('button[type="submit"], input[type="submit"]');
                if (submitBtn) {
                    await submitBtn.click();
                    await delay(2000);
                }

                // Look for error message
                const errorMsg = await page.$('.error, .alert-danger, [class*="error"], .flash-message');
                if (errorMsg) {
                    const text = await errorMsg.evaluate(el => el.textContent);
                    console.log(`  Error message: ${text}`);
                }
            }
            await takeScreenshot(page, 'login-wrong-password');

            // Re-login
            await ensureLoggedIn(page, TEST_USERNAME, TEST_PASSWORD);
        });

        it('should handle logout correctly', async () => {
            // Make sure we're logged in first
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });

            // Try to logout
            await page.goto(`${BASE_URL}/logout`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const afterLogoutUrl = page.url();
            console.log(`  After logout URL: ${afterLogoutUrl}`);

            // Should redirect to login or home
            const isLoggedOut = afterLogoutUrl.includes('/login') ||
                                afterLogoutUrl === `${BASE_URL}/` ||
                                afterLogoutUrl.includes('logout');
            expect(isLoggedOut).to.be.true;

            await takeScreenshot(page, 'after-logout');

            // Re-login for remaining tests
            await ensureLoggedIn(page, TEST_USERNAME, TEST_PASSWORD);
        });

        it('should redirect to login when session expires', async () => {
            // Clear cookies to simulate session expiry
            const client = await page.target().createCDPSession();
            await client.send('Network.clearBrowserCookies');

            // Try to access protected page
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const currentUrl = page.url();
            console.log(`  After clearing cookies URL: ${currentUrl}`);

            // Should redirect to login
            const redirectedToLogin = currentUrl.includes('/login');
            console.log(`  Redirected to login: ${redirectedToLogin}`);

            await takeScreenshot(page, 'session-expired-redirect');

            // Re-login
            await ensureLoggedIn(page, TEST_USERNAME, TEST_PASSWORD);
        });

        it('should prevent access to protected pages when logged out', async () => {
            // Logout first
            await page.goto(`${BASE_URL}/logout`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            // Try to access protected pages
            const protectedUrls = [
                `${BASE_URL}/settings`,
                `${BASE_URL}/history`,
                `${BASE_URL}/library/`
            ];

            for (const url of protectedUrls) {
                await page.goto(url, { waitUntil: 'domcontentloaded' });
                await delay(500);

                const currentUrl = page.url();
                const isProtected = currentUrl.includes('/login') || currentUrl !== url;
                console.log(`  ${url} protected: ${isProtected}`);
            }

            await takeScreenshot(page, 'protected-pages-check');

            // Re-login
            await ensureLoggedIn(page, TEST_USERNAME, TEST_PASSWORD);
        });

        it('should handle multiple failed login attempts', async () => {
            await page.goto(`${BASE_URL}/logout`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            // Try multiple failed logins
            for (let i = 0; i < 3; i++) {
                await page.goto(`${BASE_URL}/login`, { waitUntil: 'domcontentloaded' });

                const usernameInput = await page.$('input[name="username"], #username');
                const passwordInput = await page.$('input[name="password"], #password');

                if (usernameInput && passwordInput) {
                    await usernameInput.type(`bad_user_${i}`);
                    await passwordInput.type(`bad_pass_${i}`);

                    const submitBtn = await page.$('button[type="submit"], input[type="submit"]');
                    if (submitBtn) {
                        await submitBtn.click();
                        await delay(1000);
                    }
                }
            }

            // Check for rate limiting or lockout message
            const bodyText = await page.$eval('body', el => el.textContent.toLowerCase());
            const hasRateLimit = bodyText.includes('rate') ||
                                 bodyText.includes('limit') ||
                                 bodyText.includes('too many') ||
                                 bodyText.includes('locked');
            console.log(`  Rate limiting detected: ${hasRateLimit}`);

            await takeScreenshot(page, 'multiple-failed-logins');

            // Re-login
            await ensureLoggedIn(page, TEST_USERNAME, TEST_PASSWORD);
        });
    });

    describe('Research Deletion Tests', () => {
        it('should show delete button on history items', async () => {
            await page.goto(`${BASE_URL}/history`, { waitUntil: 'domcontentloaded' });
            await delay(2000);
            await takeScreenshot(page, 'history-delete-buttons');

            // Look for delete buttons
            const deleteButtons = await page.$$('button[class*="delete"], .delete-btn, [title*="delete"], [title*="Delete"], [aria-label*="delete"], .btn-danger');
            console.log(`  Found ${deleteButtons.length} delete buttons`);

            // Also check for delete icons
            const deleteIcons = await page.$$('[class*="trash"], [class*="delete"], .fa-trash');
            console.log(`  Found ${deleteIcons.length} delete icons`);
        });

        it('should show confirmation before deleting', async () => {
            await page.goto(`${BASE_URL}/history`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Look for a delete button and click it
            const deleteBtn = await page.$('button[class*="delete"], .delete-btn, [title*="delete"], .btn-danger');
            if (deleteBtn) {
                // Set up dialog handler before clicking
                let dialogShown = false;
                page.once('dialog', async dialog => {
                    dialogShown = true;
                    console.log(`  Confirmation dialog: ${dialog.message()}`);
                    await dialog.dismiss(); // Cancel the deletion
                });

                await deleteBtn.click();
                await delay(1000);

                console.log(`  Confirmation dialog shown: ${dialogShown}`);
                await takeScreenshot(page, 'delete-confirmation');
            } else {
                console.log('  No delete button found (may be empty history)');
            }
        });

        it('should remove item from list after deletion', async () => {
            await page.goto(`${BASE_URL}/history`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Count initial items
            const initialItems = await page.$$('.history-item, .research-item, tr[data-id], [class*="history-row"]');
            console.log(`  Initial items: ${initialItems.length}`);

            if (initialItems.length > 0) {
                // Get first item identifier for comparison
                const firstItemId = await initialItems[0].evaluate(el => el.getAttribute('data-id') || el.id || 'unknown');
                console.log(`  First item ID: ${firstItemId}`);

                // Find and click delete button
                const deleteBtn = await page.$('button[class*="delete"], .delete-btn, [title*="delete"]');
                if (deleteBtn) {
                    // Accept confirmation
                    page.once('dialog', async dialog => {
                        await dialog.accept();
                    });

                    await deleteBtn.click();
                    await delay(2000);

                    // Count items after deletion
                    const afterItems = await page.$$('.history-item, .research-item, tr[data-id], [class*="history-row"]');
                    console.log(`  After deletion: ${afterItems.length}`);
                }
            }
            await takeScreenshot(page, 'history-after-delete');
        });

        it('should handle deletion via API', async () => {
            // First get list of research items
            const historyResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (Array.isArray(historyResponse) && historyResponse.length > 0) {
                const researchId = historyResponse[0].id || historyResponse[0].research_id;
                console.log(`  Attempting to delete research: ${researchId}`);

                if (researchId) {
                    const deleteResponse = await page.evaluate(async (id) => {
                        try {
                            const csrfMeta = document.querySelector('meta[name="csrf-token"]');
                            const csrfToken = csrfMeta ? csrfMeta.getAttribute('content') : '';

                            const res = await fetch(`/api/research/${id}`, {
                                method: 'DELETE',
                                credentials: 'include',
                                headers: {
                                    'X-CSRFToken': csrfToken
                                }
                            });
                            return { status: res.status, ok: res.ok };
                        } catch (e) {
                            return { error: e.message };
                        }
                    }, researchId);

                    console.log(`  Delete API response: ${JSON.stringify(deleteResponse)}`);
                    expect(deleteResponse.status).to.be.oneOf([200, 204, 401, 404]);
                }
            } else {
                console.log('  No research items to delete');
            }
        });

        it('should handle clear all history', async () => {
            await page.goto(`${BASE_URL}/history`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Look for "clear all" button
            const clearAllBtn = await page.$('button[class*="clear-all"], .clear-history, [title*="clear all"], #clear-all');
            if (clearAllBtn) {
                console.log('  Found clear all button');

                // Set up dialog handler
                page.once('dialog', async dialog => {
                    console.log(`  Clear all dialog: ${dialog.message()}`);
                    await dialog.dismiss(); // Don't actually clear
                });

                await clearAllBtn.click();
                await delay(1000);
            } else {
                console.log('  No clear all button found');
            }

            await takeScreenshot(page, 'history-clear-all');
        });

        it('should prevent deletion of in-progress research', async () => {
            // Try to delete an in-progress research via API
            const response = await page.evaluate(async () => {
                try {
                    const csrfMeta = document.querySelector('meta[name="csrf-token"]');
                    const csrfToken = csrfMeta ? csrfMeta.getAttribute('content') : '';

                    // Try with a fake in-progress ID
                    const res = await fetch('/api/research/in-progress-fake-id', {
                        method: 'DELETE',
                        credentials: 'include',
                        headers: {
                            'X-CSRFToken': csrfToken
                        }
                    });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Delete in-progress response: ${JSON.stringify(response)}`);
            // Should return error (404, 400, 405 Method Not Allowed, etc.)
            expect(response.status).to.be.oneOf([400, 401, 404, 405, 409]);
        });
    });

    describe('Research Termination Tests', () => {
        it('should show terminate button during research', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Check progress pages in history for terminate button
            await page.goto(`${BASE_URL}/history`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Look for any in-progress items
            const inProgressItems = await page.$$('[class*="in-progress"], [class*="running"], [data-status="running"]');
            console.log(`  Found ${inProgressItems.length} in-progress items`);

            // Look for terminate/stop buttons
            const terminateButtons = await page.$$('button[class*="terminate"], button[class*="stop"], .cancel-btn, [title*="stop"], [title*="terminate"]');
            console.log(`  Found ${terminateButtons.length} terminate buttons`);

            await takeScreenshot(page, 'terminate-button-check');
        });

        it('should terminate research via API', async () => {
            // Get a research ID that might be in progress
            const historyResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (Array.isArray(historyResponse) && historyResponse.length > 0) {
                const researchId = historyResponse[0].id || historyResponse[0].research_id;
                console.log(`  Attempting to terminate research: ${researchId}`);

                if (researchId) {
                    const terminateResponse = await page.evaluate(async (id) => {
                        try {
                            const csrfMeta = document.querySelector('meta[name="csrf-token"]');
                            const csrfToken = csrfMeta ? csrfMeta.getAttribute('content') : '';

                            const res = await fetch(`/api/research/${id}/terminate`, {
                                method: 'POST',
                                credentials: 'include',
                                headers: {
                                    'Content-Type': 'application/json',
                                    'X-CSRFToken': csrfToken
                                }
                            });
                            return { status: res.status, body: await res.text() };
                        } catch (e) {
                            return { error: e.message };
                        }
                    }, researchId);

                    console.log(`  Terminate API response: ${JSON.stringify(terminateResponse)}`);
                    // Accept various responses - may already be completed
                    expect(terminateResponse.status).to.be.oneOf([200, 400, 401, 404, 409]);
                }
            } else {
                console.log('  No research items to terminate');
            }
        });

        it('should update UI when research is terminated', async () => {
            // Navigate to a progress page if we have a research
            const historyResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (Array.isArray(historyResponse) && historyResponse.length > 0) {
                const researchId = historyResponse[0].id || historyResponse[0].research_id;
                if (researchId) {
                    try {
                        await page.goto(`${BASE_URL}/progress/${researchId}`, {
                            waitUntil: 'domcontentloaded',
                            timeout: 10000
                        });
                    } catch (e) {
                        console.log('  Progress page timeout (expected)');
                    }

                    // Check for status indicators
                    const bodyText = await page.$eval('body', el => el.textContent.toLowerCase());
                    const hasStatus = bodyText.includes('complete') ||
                                      bodyText.includes('terminated') ||
                                      bodyText.includes('cancelled') ||
                                      bodyText.includes('progress');
                    console.log(`  Has status indicator: ${hasStatus}`);

                    await takeScreenshot(page, 'research-status-ui');
                }
            } else {
                console.log('  No research items available');
            }
        });

        it('should show partial results after termination', async () => {
            const historyResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (Array.isArray(historyResponse) && historyResponse.length > 0) {
                // Find a terminated or completed research
                const research = historyResponse.find(r =>
                    r.status === 'terminated' || r.status === 'cancelled' || r.status === 'completed');

                if (research) {
                    const researchId = research.id || research.research_id;
                    await page.goto(`${BASE_URL}/results/${researchId}`, { waitUntil: 'domcontentloaded' });
                    await delay(2000);

                    // Check for result content
                    const hasResults = await page.$('#results-content, .results, [class*="result"]');
                    console.log(`  Has results container: ${hasResults !== null}`);

                    await takeScreenshot(page, 'partial-results');
                }
            } else {
                console.log('  No research items to check');
            }
        });

        it('should handle termination of already completed research', async () => {
            const historyResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (Array.isArray(historyResponse) && historyResponse.length > 0) {
                // Find a completed research
                const completed = historyResponse.find(r => r.status === 'completed');
                if (completed) {
                    const researchId = completed.id || completed.research_id;

                    const response = await page.evaluate(async (id) => {
                        try {
                            const csrfMeta = document.querySelector('meta[name="csrf-token"]');
                            const csrfToken = csrfMeta ? csrfMeta.getAttribute('content') : '';

                            const res = await fetch(`/api/research/${id}/terminate`, {
                                method: 'POST',
                                credentials: 'include',
                                headers: {
                                    'X-CSRFToken': csrfToken
                                }
                            });
                            return { status: res.status, body: await res.text() };
                        } catch (e) {
                            return { error: e.message };
                        }
                    }, researchId);

                    console.log(`  Terminate completed research: ${JSON.stringify(response)}`);
                    // Should gracefully handle (400 or 409 for already completed)
                    expect(response.status).to.be.oneOf([200, 400, 401, 404, 409]);
                } else {
                    console.log('  No completed research found');
                }
            } else {
                console.log('  No research items available');
            }
        });
    });

    describe('Research Details Page Tests', () => {
        let testResearchId;

        before(async () => {
            // Get a research ID for testing
            const historyResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (Array.isArray(historyResponse) && historyResponse.length > 0) {
                testResearchId = historyResponse[0].id || historyResponse[0].research_id;
                console.log(`  Using research ID: ${testResearchId}`);
            }
        });

        it('should load details page for completed research', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            await page.goto(`${BASE_URL}/results/${testResearchId}`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const url = page.url();
            console.log(`  Details page URL: ${url}`);

            await takeScreenshot(page, 'research-details-page');
            expect(url).to.include('/results/');
        });

        it('should display query and parameters', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            await page.goto(`${BASE_URL}/results/${testResearchId}`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Look for query display
            const queryElement = await page.$('#result-query, .research-query, [class*="query"]');
            if (queryElement) {
                const queryText = await queryElement.evaluate(el => el.textContent);
                console.log(`  Query: ${queryText}`);
            }

            // Look for parameters
            const params = await page.$$('[class*="param"], [class*="setting"], .research-params');
            console.log(`  Found ${params.length} parameter elements`);

            await takeScreenshot(page, 'research-query-params');
        });

        it('should show research timing information', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            await page.goto(`${BASE_URL}/results/${testResearchId}`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const bodyText = await page.$eval('body', el => el.textContent);

            // Check for timing info
            const hasStartTime = bodyText.includes('started') ||
                                 bodyText.includes('Started') ||
                                 bodyText.includes('created') ||
                                 bodyText.includes('timestamp');
            const hasDuration = bodyText.includes('duration') ||
                                bodyText.includes('Duration') ||
                                bodyText.includes('took') ||
                                bodyText.includes('minutes') ||
                                bodyText.includes('seconds');

            console.log(`  Has start time: ${hasStartTime}`);
            console.log(`  Has duration: ${hasDuration}`);

            await takeScreenshot(page, 'research-timing');
        });

        it('should display model and provider used', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            // Get research details via API
            const details = await page.evaluate(async (id) => {
                try {
                    const res = await fetch(`/api/research/${id}`, { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            }, testResearchId);

            console.log(`  Research details: ${JSON.stringify(details).substring(0, 500)}`);

            if (details.model || details.provider || details.llm_provider) {
                console.log(`  Model: ${details.model || 'N/A'}`);
                console.log(`  Provider: ${details.provider || details.llm_provider || 'N/A'}`);
            }
        });

        it('should show iteration breakdown', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            await page.goto(`${BASE_URL}/results/${testResearchId}`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Look for iteration info
            const iterations = await page.$$('[class*="iteration"], .iteration-item');
            console.log(`  Found ${iterations.length} iteration elements`);

            const bodyText = await page.$eval('body', el => el.textContent);
            const hasIterationInfo = bodyText.includes('iteration') ||
                                     bodyText.includes('Iteration') ||
                                     bodyText.includes('step') ||
                                     bodyText.includes('phase');
            console.log(`  Has iteration info: ${hasIterationInfo}`);

            await takeScreenshot(page, 'research-iterations');
        });

        it('should have link back to results', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            await page.goto(`${BASE_URL}/results/${testResearchId}`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Look for navigation links
            const navLinks = await page.$$('a[href*="history"], a[href*="results"], .back-link, [class*="nav"]');
            console.log(`  Found ${navLinks.length} navigation links`);

            // Check for home/back button
            const homeLink = await page.$('a[href="/"], .home-link, [title*="home"]');
            console.log(`  Home link found: ${homeLink !== null}`);

            await takeScreenshot(page, 'research-navigation');
        });
    });

    describe('Report Format Tests', () => {
        let testResearchId;

        before(async () => {
            const historyResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (Array.isArray(historyResponse) && historyResponse.length > 0) {
                testResearchId = historyResponse[0].id || historyResponse[0].research_id;
            }
        });

        it('should get report via API', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            const report = await page.evaluate(async (id) => {
                try {
                    const res = await fetch(`/api/research/${id}/report`, { credentials: 'include' });
                    const contentType = res.headers.get('content-type');
                    const text = await res.text();
                    return {
                        status: res.status,
                        contentType,
                        length: text.length,
                        preview: text.substring(0, 500)
                    };
                } catch (e) {
                    return { error: e.message };
                }
            }, testResearchId);

            console.log(`  Report API response: status=${report.status}, length=${report.length}`);
            console.log(`  Content type: ${report.contentType}`);
            if (report.preview) {
                console.log(`  Preview: ${report.preview.substring(0, 200)}`);
            }
        });

        it('should support markdown format', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            // Try to get markdown format
            const mdReport = await page.evaluate(async (id) => {
                try {
                    const res = await fetch(`/api/research/${id}/report?format=markdown`, { credentials: 'include' });
                    const text = await res.text();
                    return {
                        status: res.status,
                        hasMarkdown: text.includes('#') || text.includes('*') || text.includes('-'),
                        preview: text.substring(0, 300)
                    };
                } catch (e) {
                    return { error: e.message };
                }
            }, testResearchId);

            console.log(`  Markdown report: ${JSON.stringify(mdReport).substring(0, 300)}`);
        });

        it('should include research metadata in report', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            await page.goto(`${BASE_URL}/results/${testResearchId}`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const bodyText = await page.$eval('body', el => el.textContent);

            // Check for metadata
            const hasQuery = bodyText.includes('query') || bodyText.includes('Query') || bodyText.includes('Research');
            const hasDate = bodyText.includes('date') || bodyText.includes('Date') || /\d{4}[-\/]\d{2}[-\/]\d{2}/.test(bodyText);

            console.log(`  Has query in report: ${hasQuery}`);
            console.log(`  Has date in report: ${hasDate}`);

            await takeScreenshot(page, 'report-metadata');
        });

        it('should handle report for failed research', async () => {
            // Try to get report for a non-existent research
            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/research/non-existent-id/report', { credentials: 'include' });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Failed research report: ${JSON.stringify(response)}`);
            expect(response.status).to.be.oneOf([401, 404]);
        });

        it('should include sources in report', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            await page.goto(`${BASE_URL}/results/${testResearchId}`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const bodyText = await page.$eval('body', el => el.textContent);

            // Check for sources/references
            const hasSources = bodyText.includes('source') ||
                               bodyText.includes('Source') ||
                               bodyText.includes('reference') ||
                               bodyText.includes('Reference') ||
                               bodyText.includes('http') ||
                               bodyText.includes('wikipedia');

            console.log(`  Has sources: ${hasSources}`);

            // Look for links
            const links = await page.$$eval('a[href^="http"]', els => els.length);
            console.log(`  External links found: ${links}`);

            await takeScreenshot(page, 'report-sources');
        });
    });

    describe('News Subscription Lifecycle Tests', () => {
        let testSubscriptionId;

        before(async () => {
            // Get existing subscriptions
            const subs = await page.evaluate(async () => {
                try {
                    const res = await fetch('/news/api/subscriptions/current', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (Array.isArray(subs) && subs.length > 0) {
                testSubscriptionId = subs[0].id;
                console.log(`  Using subscription ID: ${testSubscriptionId}`);
            }
        });

        it('should edit existing subscription', async () => {
            if (!testSubscriptionId) {
                console.log('  Skipping - no subscription available');
                return;
            }

            await page.goto(`${BASE_URL}/news/subscriptions/${testSubscriptionId}/edit`, { waitUntil: 'domcontentloaded' });
            await delay(2000);
            await takeScreenshot(page, 'subscription-edit-form');

            const url = page.url();
            const hasEditForm = url.includes('/edit') || await page.$('form') !== null;
            console.log(`  Edit form found: ${hasEditForm}`);
        });

        it('should delete subscription', async () => {
            // Try delete via API
            const deleteSub = await page.evaluate(async () => {
                try {
                    const csrfMeta = document.querySelector('meta[name="csrf-token"]');
                    const csrfToken = csrfMeta ? csrfMeta.getAttribute('content') : '';

                    // Don't actually delete - just check API exists
                    const res = await fetch('/news/api/subscriptions/test-id', {
                        method: 'DELETE',
                        credentials: 'include',
                        headers: { 'X-CSRFToken': csrfToken }
                    });
                    return { status: res.status };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Delete subscription API: ${JSON.stringify(deleteSub)}`);
            expect(deleteSub.status).to.be.oneOf([200, 204, 401, 404, 405, 500]);
        });

        it('should show confirmation before delete', async () => {
            await page.goto(`${BASE_URL}/news/subscriptions`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Look for delete buttons
            const deleteBtn = await page.$('.delete-subscription, [title*="delete"], button[class*="delete"]');
            if (deleteBtn) {
                let dialogShown = false;
                page.once('dialog', async dialog => {
                    dialogShown = true;
                    console.log(`  Delete confirmation: ${dialog.message()}`);
                    await dialog.dismiss();
                });

                await deleteBtn.click();
                await delay(1000);
                console.log(`  Confirmation shown: ${dialogShown}`);
            } else {
                console.log('  No delete button found');
            }

            await takeScreenshot(page, 'subscription-delete-confirm');
        });

        it('should update subscription list after changes', async () => {
            await page.goto(`${BASE_URL}/news/subscriptions`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Count subscriptions
            const items = await page.$$('.subscription-item, tr[data-id], [class*="subscription-row"]');
            console.log(`  Subscriptions count: ${items.length}`);

            // Refresh page
            await page.reload({ waitUntil: 'domcontentloaded' });
            await delay(2000);

            const itemsAfter = await page.$$('.subscription-item, tr[data-id], [class*="subscription-row"]');
            console.log(`  After refresh: ${itemsAfter.length}`);

            await takeScreenshot(page, 'subscription-list-refresh');
        });

        it('should handle subscription API errors', async () => {
            const response = await page.evaluate(async () => {
                try {
                    const res = await fetch('/news/api/subscriptions/invalid-id-xyz', { credentials: 'include' });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Invalid subscription API: ${JSON.stringify(response)}`);
            expect(response.status).to.be.oneOf([401, 404, 500]);
        });
    });

    describe('Cost Analytics Tests', () => {
        it('should load costs page', async () => {
            await page.goto(`${BASE_URL}/costs`, { waitUntil: 'domcontentloaded' });
            await delay(2000);
            await takeScreenshot(page, 'costs-page');

            const url = page.url();
            console.log(`  Costs page URL: ${url}`);
            // Page may redirect if not available
            expect(url).to.include(BASE_URL);
        });

        it('should display cost data via API', async () => {
            const costData = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/costs', { credentials: 'include' });
                    const data = await res.json();
                    return { status: res.status, data: data };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Costs API: ${JSON.stringify(costData).substring(0, 500)}`);
            expect(costData.status).to.be.oneOf([200, 401, 404]);
        });

        it('should show cost breakdown', async () => {
            await page.goto(`${BASE_URL}/costs`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const bodyText = await page.$eval('body', el => el.textContent.toLowerCase());

            // Look for cost-related terms
            const hasCostInfo = bodyText.includes('cost') ||
                                bodyText.includes('token') ||
                                bodyText.includes('usage') ||
                                bodyText.includes('$') ||
                                bodyText.includes('price');

            console.log(`  Has cost information: ${hasCostInfo}`);

            // Look for breakdown elements
            const breakdownElements = await page.$$('[class*="cost"], [class*="breakdown"], table, .stats');
            console.log(`  Breakdown elements: ${breakdownElements.length}`);

            await takeScreenshot(page, 'cost-breakdown');
        });

        it('should handle empty cost data', async () => {
            await page.goto(`${BASE_URL}/costs`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const bodyText = await page.$eval('body', el => el.textContent);

            // Check for empty state message
            const hasEmptyState = bodyText.includes('no cost') ||
                                  bodyText.includes('No cost') ||
                                  bodyText.includes('no data') ||
                                  bodyText.includes('empty') ||
                                  bodyText.includes('0');

            console.log(`  Has empty state handling: ${hasEmptyState}`);
        });

        it('should display pricing information', async () => {
            await page.goto(`${BASE_URL}/costs`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const bodyText = await page.$eval('body', el => el.textContent);

            // Look for pricing info
            const hasPricing = bodyText.includes('price') ||
                               bodyText.includes('Price') ||
                               bodyText.includes('rate') ||
                               bodyText.includes('per') ||
                               /\$\d/.test(bodyText);

            console.log(`  Has pricing info: ${hasPricing}`);
            await takeScreenshot(page, 'cost-pricing');
        });
    });

    describe('Search Configuration UI Tests', () => {
        it('should display available search engines', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Navigate to search tab
            const searchTab = await page.$('[data-tab="search"]');
            if (searchTab) {
                await searchTab.click();
                await delay(1000);
            }

            await takeScreenshot(page, 'search-engines-settings');

            // Look for search engine options
            const engines = await page.$$('[class*="engine"], select[name*="search"] option, .search-engine-item');
            console.log(`  Search engine elements: ${engines.length}`);

            // Check API
            const enginesApi = await page.evaluate(async () => {
                try {
                    const res = await fetch('/settings/api/available-search-engines', { credentials: 'include' });
                    const data = await res.json();
                    return Array.isArray(data) ? data.map(e => e.name || e) : data;
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Available engines: ${JSON.stringify(enginesApi).substring(0, 300)}`);
        });

        it('should allow selecting different engines', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const searchTab = await page.$('[data-tab="search"]');
            if (searchTab) {
                await searchTab.click();
                await delay(1000);
            }

            // Look for engine selector
            const engineSelect = await page.$('select[name*="search_engine"], select[data-key*="search_engine"], #search-engine');
            if (engineSelect) {
                const options = await page.$$eval('select[name*="search_engine"] option, select[data-key*="search_engine"] option',
                    opts => opts.map(o => o.value));
                console.log(`  Engine options: ${JSON.stringify(options)}`);

                // Try selecting a different engine
                if (options.length > 1) {
                    await page.select('select[name*="search_engine"], select[data-key*="search_engine"]', options[1] || 'wikipedia');
                    await delay(1000);
                    console.log('  ✓ Selected different engine');
                }
            } else {
                console.log('  Engine select not found (may use custom UI)');
            }

            await takeScreenshot(page, 'search-engine-select');
        });

        it('should show engine descriptions', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const searchTab = await page.$('[data-tab="search"]');
            if (searchTab) {
                await searchTab.click();
                await delay(1000);
            }

            // Look for descriptions
            const descriptions = await page.$$('[class*="description"], .help-text, .setting-description');
            console.log(`  Description elements: ${descriptions.length}`);

            const bodyText = await page.$eval('body', el => el.textContent);
            const hasDescriptions = bodyText.includes('Wikipedia') ||
                                    bodyText.includes('search') ||
                                    bodyText.includes('engine');
            console.log(`  Has engine descriptions: ${hasDescriptions}`);

            await takeScreenshot(page, 'engine-descriptions');
        });

        it('should persist engine selection', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const searchTab = await page.$('[data-tab="search"]');
            if (searchTab) {
                await searchTab.click();
                await delay(1000);
            }

            // Get current selection
            const currentEngine = await page.evaluate(() => {
                const select = document.querySelector('select[name*="search_engine"], select[data-key*="search_engine"]');
                return select ? select.value : null;
            });
            console.log(`  Current engine: ${currentEngine}`);

            // Reload and check
            await page.reload({ waitUntil: 'domcontentloaded' });
            await delay(2000);

            if (searchTab) {
                const newSearchTab = await page.$('[data-tab="search"]');
                if (newSearchTab) await newSearchTab.click();
                await delay(1000);
            }

            const afterReload = await page.evaluate(() => {
                const select = document.querySelector('select[name*="search_engine"], select[data-key*="search_engine"]');
                return select ? select.value : null;
            });
            console.log(`  After reload: ${afterReload}`);

            await takeScreenshot(page, 'engine-persistence');
        });
    });

    describe('Follow-up Research Tests', () => {
        let testResearchId;

        before(async () => {
            const historyResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (Array.isArray(historyResponse) && historyResponse.length > 0) {
                testResearchId = historyResponse[0].id || historyResponse[0].research_id;
            }
        });

        it('should load follow-up page', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            await page.goto(`${BASE_URL}/follow-up/${testResearchId}`, { waitUntil: 'domcontentloaded' });
            await delay(2000);
            await takeScreenshot(page, 'follow-up-page');

            const url = page.url();
            console.log(`  Follow-up page URL: ${url}`);
            // May redirect if feature not available
            expect(url).to.include(BASE_URL);
        });

        it('should show original research context', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            await page.goto(`${BASE_URL}/follow-up/${testResearchId}`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const bodyText = await page.$eval('body', el => el.textContent);

            // Look for original query or context
            const hasContext = bodyText.includes('original') ||
                               bodyText.includes('Original') ||
                               bodyText.includes('previous') ||
                               bodyText.includes('based on') ||
                               bodyText.includes('follow');

            console.log(`  Has original context: ${hasContext}`);
            await takeScreenshot(page, 'follow-up-context');
        });

        it('should handle follow-up submission', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            await page.goto(`${BASE_URL}/follow-up/${testResearchId}`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Look for follow-up query input
            const queryInput = await page.$('#follow-up-query, #query, textarea[name="query"]');
            if (queryInput) {
                await queryInput.type('Tell me more about this topic');
                console.log('  ✓ Entered follow-up query');

                // Look for submit button
                const submitBtn = await page.$('button[type="submit"], .submit-btn');
                if (submitBtn) {
                    console.log('  Found submit button');
                }
            } else {
                console.log('  Follow-up input not found (feature may not be available)');
            }

            await takeScreenshot(page, 'follow-up-submission');
        });
    });

    describe('Password Change Tests', () => {
        it('should load change password page', async () => {
            await page.goto(`${BASE_URL}/auth/change-password`, { waitUntil: 'domcontentloaded' });
            await delay(2000);
            await takeScreenshot(page, 'change-password-page');

            const url = page.url();
            console.log(`  Change password page URL: ${url}`);

            // Check for password form elements
            const currentPassword = await page.$('input[name="current_password"], input[type="password"]');
            const newPassword = await page.$('input[name="new_password"], input[name="password"]');

            console.log(`  Current password field: ${currentPassword !== null}`);
            console.log(`  New password field: ${newPassword !== null}`);

            // Page should load (may redirect if not supported)
            expect(url).to.include(BASE_URL);
        });

        it('should validate current password', async () => {
            await page.goto(`${BASE_URL}/auth/change-password`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const currentPasswordInput = await page.$('input[name="current_password"], #current-password');
            if (currentPasswordInput) {
                await currentPasswordInput.type('wrong_password_xyz');

                const newPasswordInput = await page.$('input[name="new_password"], #new-password');
                if (newPasswordInput) {
                    await newPasswordInput.type('new_password_123');
                }

                const confirmInput = await page.$('input[name="confirm_password"], #confirm-password');
                if (confirmInput) {
                    await confirmInput.type('new_password_123');
                }

                const submitBtn = await page.$('button[type="submit"]');
                if (submitBtn) {
                    await submitBtn.click();
                    await delay(2000);

                    // Should show error for wrong current password
                    const bodyText = await page.$eval('body', el => el.textContent.toLowerCase());
                    const hasError = bodyText.includes('incorrect') ||
                                     bodyText.includes('wrong') ||
                                     bodyText.includes('invalid') ||
                                     bodyText.includes('error');
                    console.log(`  Validation error shown: ${hasError}`);
                }
            } else {
                console.log('  Change password form not found (feature may not be available)');
            }

            await takeScreenshot(page, 'password-validation-error');
        });

        it('should enforce password requirements', async () => {
            await page.goto(`${BASE_URL}/auth/change-password`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const newPasswordInput = await page.$('input[name="new_password"], #new-password');
            if (newPasswordInput) {
                // Try a weak password
                await newPasswordInput.type('123');
                await delay(500);

                // Check for validation feedback
                const validation = await page.$('.error, .invalid, [class*="error"], .validation-message, .password-strength');
                if (validation) {
                    const text = await validation.evaluate(el => el.textContent);
                    console.log(`  Password requirement feedback: ${text}`);
                }
            } else {
                console.log('  New password field not found');
            }

            await takeScreenshot(page, 'password-requirements');
        });

        it('should have password confirmation field', async () => {
            await page.goto(`${BASE_URL}/auth/change-password`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            const confirmInput = await page.$('input[name="confirm_password"], input[name="password_confirm"], #confirm-password');
            console.log(`  Confirm password field exists: ${confirmInput !== null}`);

            // Look for password match validation
            const newPasswordInput = await page.$('input[name="new_password"], #new-password');
            if (newPasswordInput && confirmInput) {
                await newPasswordInput.type('password123');
                await confirmInput.type('different456');
                await delay(500);

                const bodyText = await page.$eval('body', el => el.textContent.toLowerCase());
                const hasMismatchWarning = bodyText.includes('match') ||
                                           bodyText.includes('same') ||
                                           bodyText.includes('confirm');
                console.log(`  Password mismatch handled: ${hasMismatchWarning}`);
            }

            await takeScreenshot(page, 'password-confirm-field');
        });
    });

    describe('CSRF Token Tests', () => {
        it('should retrieve CSRF token from endpoint', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            const csrfResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/auth/csrf-token', { credentials: 'include' });
                    const data = await res.json();
                    return { status: res.status, hasToken: !!data.csrf_token || !!data.token, data };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  CSRF token endpoint: ${JSON.stringify(csrfResponse)}`);
            expect(csrfResponse.status).to.be.oneOf([200, 401, 404]);
        });

        it('should have CSRF token in page meta tag', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            const csrfMeta = await page.$('meta[name="csrf-token"]');
            if (csrfMeta) {
                const token = await csrfMeta.evaluate(el => el.getAttribute('content'));
                console.log(`  CSRF token in meta tag: ${token ? 'present' : 'missing'}`);
                console.log(`  Token length: ${token ? token.length : 0}`);
                expect(token).to.not.be.null;
                expect(token.length).to.be.greaterThan(10);
            } else {
                console.log('  CSRF meta tag not found (may use different method)');
            }
        });
    });

    describe('Research Ratings Tests', () => {
        let testResearchId;

        before(async () => {
            const historyResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (Array.isArray(historyResponse) && historyResponse.length > 0) {
                testResearchId = historyResponse[0].id || historyResponse[0].research_id;
            }
        });

        it('should load star reviews page', async () => {
            await page.goto(`${BASE_URL}/star-reviews`, { waitUntil: 'domcontentloaded' });
            await delay(2000);
            await takeScreenshot(page, 'star-reviews-page');

            const url = page.url();
            console.log(`  Star reviews page URL: ${url}`);

            // Check for ratings elements
            const ratingElements = await page.$$('[class*="star"], [class*="rating"], .review-item');
            console.log(`  Rating elements found: ${ratingElements.length}`);
        });

        it('should submit rating for research', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            const ratingResponse = await page.evaluate(async (id) => {
                try {
                    const csrfMeta = document.querySelector('meta[name="csrf-token"]');
                    const csrfToken = csrfMeta ? csrfMeta.getAttribute('content') : '';

                    const res = await fetch(`/api/ratings/${id}`, {
                        method: 'POST',
                        credentials: 'include',
                        headers: {
                            'Content-Type': 'application/json',
                            'X-CSRFToken': csrfToken
                        },
                        body: JSON.stringify({ rating: 4, comment: 'Test rating from E2E' })
                    });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            }, testResearchId);

            console.log(`  Rating submission: ${JSON.stringify(ratingResponse)}`);
            expect(ratingResponse.status).to.be.oneOf([200, 201, 400, 401, 404, 500]);
        });

        it('should retrieve ratings via API', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            const ratingsResponse = await page.evaluate(async (id) => {
                try {
                    const res = await fetch(`/api/ratings/${id}`, { credentials: 'include' });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            }, testResearchId);

            console.log(`  Ratings retrieval: ${JSON.stringify(ratingsResponse).substring(0, 200)}`);
            expect(ratingsResponse.status).to.be.oneOf([200, 401, 404, 500]);
        });

        it('should handle rating analytics', async () => {
            const analyticsResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/rating-analytics', { credentials: 'include' });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Rating analytics: ${JSON.stringify(analyticsResponse).substring(0, 200)}`);
            expect(analyticsResponse.status).to.be.oneOf([200, 401, 404, 500]);
        });
    });

    describe('Settings Backup Tests', () => {
        it('should export settings via API', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            const exportResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/settings/api/settings', { credentials: 'include' });
                    const data = await res.json();
                    return {
                        status: res.status,
                        hasSettings: Object.keys(data).length > 0,
                        settingsCount: Object.keys(data).length
                    };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Settings export: ${JSON.stringify(exportResponse)}`);
            expect(exportResponse.status).to.be.oneOf([200, 401, 404]);
            if (exportResponse.status === 200) {
                expect(exportResponse.hasSettings).to.be.true;
            }
        });

        it('should import settings from defaults', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            const importResponse = await page.evaluate(async () => {
                try {
                    const csrfMeta = document.querySelector('meta[name="csrf-token"]');
                    const csrfToken = csrfMeta ? csrfMeta.getAttribute('content') : '';

                    const res = await fetch('/settings/api/import', {
                        method: 'POST',
                        credentials: 'include',
                        headers: {
                            'Content-Type': 'application/json',
                            'X-CSRFToken': csrfToken
                        }
                    });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Settings import: ${JSON.stringify(importResponse)}`);
            expect(importResponse.status).to.be.oneOf([200, 400, 401, 404, 500]);
        });

        it('should reset settings to defaults', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            const resetResponse = await page.evaluate(async () => {
                try {
                    const csrfMeta = document.querySelector('meta[name="csrf-token"]');
                    const csrfToken = csrfMeta ? csrfMeta.getAttribute('content') : '';

                    const res = await fetch('/settings/reset_to_defaults', {
                        method: 'POST',
                        credentials: 'include',
                        headers: {
                            'Content-Type': 'application/json',
                            'X-CSRFToken': csrfToken
                        }
                    });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Settings reset: ${JSON.stringify(resetResponse)}`);
            expect(resetResponse.status).to.be.oneOf([200, 302, 400, 401, 404, 500]);
        });

        it('should get bulk settings', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            const bulkResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/settings/api/bulk', { credentials: 'include' });
                    const data = await res.json();
                    return {
                        status: res.status,
                        hasData: typeof data === 'object',
                        keys: Object.keys(data).slice(0, 5)
                    };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Bulk settings: ${JSON.stringify(bulkResponse)}`);
            expect(bulkResponse.status).to.be.oneOf([200, 401, 404, 500]);
        });
    });

    describe('Queue Management Tests', () => {
        it('should get queue status via API', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            const queueResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/queue/status', { credentials: 'include' });
                    const data = await res.json();
                    return { status: res.status, data };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Queue status: ${JSON.stringify(queueResponse)}`);
            expect(queueResponse.status).to.be.oneOf([200, 401, 404, 500]);
        });

        it('should show queue position for research', async () => {
            // Get a research ID first
            const historyResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (Array.isArray(historyResponse) && historyResponse.length > 0) {
                const researchId = historyResponse[0].id || historyResponse[0].research_id;

                const positionResponse = await page.evaluate(async (id) => {
                    try {
                        const res = await fetch(`/api/queue/${id}/position`, { credentials: 'include' });
                        return { status: res.status, body: await res.text() };
                    } catch (e) {
                        return { error: e.message };
                    }
                }, researchId);

                console.log(`  Queue position: ${JSON.stringify(positionResponse)}`);
                expect(positionResponse.status).to.be.oneOf([200, 400, 401, 404, 500]);
            } else {
                console.log('  No research items for queue position test');
            }
        });

        it('should handle empty queue gracefully', async () => {
            const emptyQueueResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/queue/non-existent-id/position', { credentials: 'include' });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Empty queue handling: ${JSON.stringify(emptyQueueResponse)}`);
            // Should return 404 or similar for non-existent research
            expect(emptyQueueResponse.status).to.be.oneOf([200, 400, 401, 404, 500]);
        });
    });

    describe('Research Resources Tests', () => {
        let testResearchId;

        before(async () => {
            const historyResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (Array.isArray(historyResponse) && historyResponse.length > 0) {
                testResearchId = historyResponse[0].id || historyResponse[0].research_id;
            }
        });

        it('should list resources for research', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            const resourcesResponse = await page.evaluate(async (id) => {
                try {
                    const res = await fetch(`/api/resources/${id}`, { credentials: 'include' });
                    const data = await res.json();
                    return {
                        status: res.status,
                        isArray: Array.isArray(data),
                        count: Array.isArray(data) ? data.length : 0
                    };
                } catch (e) {
                    return { error: e.message };
                }
            }, testResearchId);

            console.log(`  Resources list: ${JSON.stringify(resourcesResponse)}`);
            expect(resourcesResponse.status).to.be.oneOf([200, 401, 404, 500]);
        });

        it('should handle research with no resources', async () => {
            const noResourcesResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/resources/non-existent-research-id', { credentials: 'include' });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  No resources handling: ${JSON.stringify(noResourcesResponse)}`);
            expect(noResourcesResponse.status).to.be.oneOf([200, 400, 401, 404, 500]);
        });

        it('should get resource details via API', async () => {
            if (!testResearchId) {
                console.log('  Skipping - no research ID available');
                return;
            }

            // First get the list of resources
            const resourcesList = await page.evaluate(async (id) => {
                try {
                    const res = await fetch(`/api/resources/${id}`, { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            }, testResearchId);

            if (Array.isArray(resourcesList) && resourcesList.length > 0) {
                const resourceId = resourcesList[0].id;
                console.log(`  Checking resource: ${resourceId}`);

                const detailResponse = await page.evaluate(async (resId, researchId) => {
                    try {
                        const res = await fetch(`/api/resources/${researchId}/${resId}`, { credentials: 'include' });
                        return { status: res.status, body: await res.text() };
                    } catch (e) {
                        return { error: e.message };
                    }
                }, resourceId, testResearchId);

                console.log(`  Resource detail: ${JSON.stringify(detailResponse).substring(0, 200)}`);
            } else {
                console.log('  No resources available for detail test');
            }
        });
    });

    describe('Search Engine Connectivity Tests', () => {
        it('should verify search engine API availability', async () => {
            // Test via the settings API that checks search engine availability
            const searchEnginesResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/settings/api/search-engines', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log('  Available search engines:', JSON.stringify(searchEnginesResponse).substring(0, 500));

            if (searchEnginesResponse.engines) {
                const hasSerper = searchEnginesResponse.engines.some(e => e.id === 'serper' || e.name?.toLowerCase().includes('serper'));
                console.log(`  Serper available: ${hasSerper}`);
            }
        });

        it('should check search engine configuration in settings', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Click on Search tab
            const searchTab = await page.$('[data-tab="search"]');
            if (searchTab) {
                await searchTab.click();
                await delay(1000);
            }

            // Check for search engine dropdown or selection
            const pageContent = await page.$eval('body', el => el.textContent);
            const hasSearchConfig = pageContent.includes('serper') ||
                                    pageContent.includes('Serper') ||
                                    pageContent.includes('search engine');
            console.log(`  Search config visible: ${hasSearchConfig}`);
            await takeScreenshot(page, 'search-engine-settings');
        });
    });

    describe('LLM Provider Connectivity Tests', () => {
        it('should verify model availability via API', async () => {
            const modelsResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/settings/api/models?provider=openrouter', { credentials: 'include' });
                    return await res.json();
                } catch (e) {
                    return { error: e.message };
                }
            });

            if (modelsResponse.models) {
                console.log(`  Models available: ${modelsResponse.models.length}`);
                // Check for Gemini model
                const hasGemini = modelsResponse.models.some(m =>
                    m.id?.includes('gemini') || m.name?.toLowerCase().includes('gemini'));
                console.log(`  Gemini model available: ${hasGemini}`);
            } else {
                console.log('  Models response:', JSON.stringify(modelsResponse).substring(0, 300));
            }
        });

        it('should check LLM configuration in settings', async () => {
            await page.goto(`${BASE_URL}/settings`, { waitUntil: 'domcontentloaded' });
            await delay(2000);

            // Click on LLM tab
            const llmTab = await page.$('[data-tab="llm"]');
            if (llmTab) {
                await llmTab.click();
                await delay(1000);
            }

            // Check for provider selection
            const pageContent = await page.$eval('body', el => el.textContent);
            const hasLLMConfig = pageContent.includes('OpenRouter') ||
                                 pageContent.includes('provider') ||
                                 pageContent.includes('model');
            console.log(`  LLM config visible: ${hasLLMConfig}`);
            await takeScreenshot(page, 'llm-settings');
        });
    });

    describe('System Health Tests', () => {
        it('should verify server responds to API requests', async () => {
            const healthResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/health', { credentials: 'include' });
                    if (res.ok) {
                        return { status: res.status, body: await res.json() };
                    }
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log('  Health check:', JSON.stringify(healthResponse));
            // Server is healthy if we can reach it
            expect(healthResponse.status).to.be.oneOf([200, 404]); // 404 is ok if no health endpoint
        });

        it('should verify database connectivity via history API', async () => {
            // Check if we can access research history (requires DB)
            const historyResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/history?limit=1', { credentials: 'include' });
                    return { status: res.status, body: await res.text() };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log(`  Database check (history API): status=${historyResponse.status}`);
            expect(historyResponse.status).to.be.oneOf([200, 401, 404]);
        });

        it('should check active research count', async () => {
            const activeResponse = await page.evaluate(async () => {
                try {
                    const res = await fetch('/api/research/active', { credentials: 'include' });
                    if (res.ok) {
                        return await res.json();
                    }
                    return { status: res.status };
                } catch (e) {
                    return { error: e.message };
                }
            });

            console.log('  Active research:', JSON.stringify(activeResponse));
        });
    });

    describe('UI Component Tests', () => {
        it('should render main navigation correctly', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            // Check for main navigation elements
            const navItems = await page.$$eval('nav a, .nav-link, [data-nav]',
                els => els.map(el => ({ text: el.textContent.trim(), href: el.href })));

            console.log(`  Navigation items: ${navItems.length}`);
            navItems.slice(0, 10).forEach(item => {
                console.log(`    - ${item.text}`);
            });

            expect(navItems.length).to.be.greaterThan(0);
        });

        it('should show user info in header', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });
            await delay(1000);

            const headerContent = await page.$eval('header, .header, nav', el => el.textContent).catch(() => '');
            const hasUserInfo = headerContent.includes(TEST_USERNAME) ||
                               headerContent.includes('logout') ||
                               headerContent.includes('Logout');
            console.log(`  User info in header: ${hasUserInfo}`);
        });

        it('should have proper page structure', async () => {
            await page.goto(`${BASE_URL}/`, { waitUntil: 'domcontentloaded' });

            // Check for essential page elements
            const hasMain = await page.$('main, #main, .main-content');
            const hasFooter = await page.$('footer, .footer');

            console.log(`  Has main content area: ${!!hasMain}`);
            console.log(`  Has footer: ${!!hasFooter}`);
        });
    });
});
