"""
Error Handling Routes - Error defense and recovery analysis
Error boundary analysis, exception management, and recovery flow validation using safe domains
"""

import logging
import json
from flask import Blueprint, jsonify, request
from cdp_ninja.core import get_global_pool
from cdp_ninja.core.domain_manager import CDPDomain
from cdp_ninja.routes.route_utils import (
    ensure_domain_available, create_domain_error_response, create_success_response,
    handle_cdp_error, parse_request_params, track_endpoint_usage, SAFE_DOMAINS
)

logger = logging.getLogger(__name__)
error_handling_routes = Blueprint('error_handling', __name__)


@error_handling_routes.route('/cdp/errors/exceptions', methods=['GET', 'POST'])
def analyze_exceptions():
    """
    Analyze JavaScript exceptions and runtime errors

    @route GET/POST /cdp/errors/exceptions
    @param {string} [filter] - Filter exceptions by pattern
    @param {boolean} [include_stack] - Include stack traces
    @param {boolean} [detailed_analysis] - Perform detailed error analysis
    @param {number} [time_window] - Time window in minutes for error collection
    @returns {object} Exception analysis data

    @example
    // Basic exception analysis
    GET /cdp/errors/exceptions

    // Detailed analysis with stack traces
    POST {"include_stack": true, "detailed_analysis": true}

    // Filter specific errors
    GET /cdp/errors/exceptions?filter=TypeError&time_window=5
    """
    try:
        params = parse_request_params(request, ['filter', 'include_stack', 'detailed_analysis', 'time_window'])
        error_filter = params['filter'] or ''
        include_stack = params['include_stack'] in [True, 'true', '1']
        detailed_analysis = params['detailed_analysis'] in [True, 'true', '1']
        time_window = int(params['time_window'] or 30)

        # Ensure required domains
        if not ensure_domain_available(CDPDomain.RUNTIME, "analyze_exceptions"):
            return create_domain_error_response(CDPDomain.RUNTIME, "analyze_exceptions")

        if not ensure_domain_available(CDPDomain.CONSOLE, "analyze_exceptions"):
            return create_domain_error_response(CDPDomain.CONSOLE, "analyze_exceptions")

        pool = get_global_pool()
        cdp = pool.acquire()

        try:
            # Exception analysis code
            exception_analysis_code = f"""
                (() => {{
                    const exceptionAnalysis = {{
                        runtime_exceptions: [],
                        console_errors: [],
                        exception_patterns: {{}},
                        error_frequency: {{}},
                        recovery_suggestions: []
                    }};

                    // Set up exception capture if not already done
                    if (!window._cdp_exception_handler) {{
                        window._cdp_exception_handler = true;
                        window._cdp_exceptions = [];

                        // Global error handler
                        window.addEventListener('error', (event) => {{
                            window._cdp_exceptions.push({{
                                type: 'runtime_error',
                                message: event.message,
                                filename: event.filename,
                                lineno: event.lineno,
                                colno: event.colno,
                                error: event.error ? {{
                                    name: event.error.name,
                                    message: event.error.message,
                                    stack: event.error.stack
                                }} : null,
                                timestamp: Date.now()
                            }});
                        }});

                        // Unhandled promise rejection handler
                        window.addEventListener('unhandledrejection', (event) => {{
                            window._cdp_exceptions.push({{
                                type: 'unhandled_rejection',
                                reason: event.reason ? event.reason.toString() : 'Unknown',
                                promise: 'Promise rejection',
                                timestamp: Date.now()
                            }});
                        }});
                    }}

                    // Collect exceptions from the time window
                    const timeWindowMs = {time_window} * 60 * 1000;
                    const cutoffTime = Date.now() - timeWindowMs;

                    if (window._cdp_exceptions) {{
                        const filteredExceptions = window._cdp_exceptions.filter(exc => {{
                            const matchesFilter = !'{error_filter}' ||
                                exc.message.includes('{error_filter}') ||
                                (exc.error && exc.error.name.includes('{error_filter}'));
                            const inTimeWindow = exc.timestamp >= cutoffTime;
                            return matchesFilter && inTimeWindow;
                        }});

                        exceptionAnalysis.runtime_exceptions = filteredExceptions;

                        // Analyze patterns
                        const patterns = {{}};
                        const frequency = {{}};

                        filteredExceptions.forEach(exc => {{
                            const errorType = exc.error ? exc.error.name : exc.type;
                            frequency[errorType] = (frequency[errorType] || 0) + 1;

                            if (exc.error && exc.error.message) {{
                                const pattern = exc.error.message.replace(/\\d+/g, 'N').replace(/['"]/g, '');
                                patterns[pattern] = (patterns[pattern] || 0) + 1;
                            }}
                        }});

                        exceptionAnalysis.exception_patterns = patterns;
                        exceptionAnalysis.error_frequency = frequency;
                    }}

                    // Generate recovery suggestions
                    const suggestions = [];
                    Object.keys(exceptionAnalysis.error_frequency).forEach(errorType => {{
                        const count = exceptionAnalysis.error_frequency[errorType];

                        switch (errorType) {{
                            case 'TypeError':
                                suggestions.push(`${{count}} TypeError(s) detected - check variable initialization and method calls`);
                                break;
                            case 'ReferenceError':
                                suggestions.push(`${{count}} ReferenceError(s) detected - verify variable declarations and scope`);
                                break;
                            case 'SyntaxError':
                                suggestions.push(`${{count}} SyntaxError(s) detected - review code syntax and structure`);
                                break;
                            case 'NetworkError':
                                suggestions.push(`${{count}} NetworkError(s) detected - check connectivity and API endpoints`);
                                break;
                            case 'unhandled_rejection':
                                suggestions.push(`${{count}} unhandled promise rejection(s) - add .catch() handlers`);
                                break;
                            default:
                                if (count > 3) {{
                                    suggestions.push(`${{count}} ${{errorType}} errors - pattern suggests systematic issue`);
                                }}
                        }}
                    }});

                    exceptionAnalysis.recovery_suggestions = suggestions;

                    // Additional analysis if requested
                    if ({str(detailed_analysis).lower()}) {{
                        exceptionAnalysis.detailed_metrics = {{
                            total_exceptions: exceptionAnalysis.runtime_exceptions.length,
                            unique_error_types: Object.keys(exceptionAnalysis.error_frequency).length,
                            most_frequent_error: Object.keys(exceptionAnalysis.error_frequency).reduce((a, b) =>
                                exceptionAnalysis.error_frequency[a] > exceptionAnalysis.error_frequency[b] ? a : b, ''),
                            error_rate_per_minute: exceptionAnalysis.runtime_exceptions.length / {time_window},
                            time_window_minutes: {time_window}
                        }};

                        // Stack trace analysis if available and requested
                        if ({str(include_stack).lower()}) {{
                            exceptionAnalysis.stack_analysis = {{
                                exceptions_with_stack: 0,
                                common_stack_patterns: []
                            }};

                            const stackPatterns = {{}};
                            exceptionAnalysis.runtime_exceptions.forEach(exc => {{
                                if (exc.error && exc.error.stack) {{
                                    exceptionAnalysis.stack_analysis.exceptions_with_stack++;

                                    // Extract first few stack frames
                                    const stackLines = exc.error.stack.split('\\n').slice(0, 3);
                                    const pattern = stackLines.join(' | ');
                                    stackPatterns[pattern] = (stackPatterns[pattern] || 0) + 1;
                                }}
                            }});

                            exceptionAnalysis.stack_analysis.common_stack_patterns = Object.entries(stackPatterns)
                                .sort(([,a], [,b]) => b - a)
                                .slice(0, 5)
                                .map(([pattern, count]) => ({{ pattern, count }}));
                        }}
                    }}

                    return exceptionAnalysis;
                }})()
            """

            result = cdp.send_command('Runtime.evaluate', {
                'expression': exception_analysis_code,
                'returnByValue': True,
                'timeout': 10000
            })

            exception_data = result.get('result', {}).get('result', {}).get('value')

            # Track endpoint usage
            track_endpoint_usage("analyze_exceptions", [CDPDomain.RUNTIME, CDPDomain.CONSOLE], params)

            return jsonify(create_success_response({
                "exception_analysis": exception_data,
                "filter_applied": error_filter,
                "time_window_minutes": time_window,
                "include_stack": include_stack,
                "detailed_analysis": detailed_analysis
            }, "analyze_exceptions", [CDPDomain.RUNTIME, CDPDomain.CONSOLE]))

        finally:
            pool.release(cdp)

    except Exception as e:
        return handle_cdp_error("analyze_exceptions", e, params, "analyze_exceptions")


@error_handling_routes.route('/cdp/errors/promises', methods=['GET', 'POST'])
def track_promise_errors():
    """
    Track unhandled promise rejections and async error patterns

    @route GET/POST /cdp/errors/promises
    @param {number} [monitoring_duration] - How long to monitor in seconds
    @param {boolean} [include_resolved] - Include resolved promises
    @param {boolean} [pattern_analysis] - Analyze error patterns
    @returns {object} Promise error tracking data

    @example
    // Monitor promises for 30 seconds
    POST {"monitoring_duration": 30}

    // Comprehensive promise analysis
    POST {
      "monitoring_duration": 60,
      "include_resolved": true,
      "pattern_analysis": true
    }
    """
    try:
        params = parse_request_params(request, ['monitoring_duration', 'include_resolved', 'pattern_analysis'])
        monitoring_duration = int(params['monitoring_duration'] or 10)
        include_resolved = params['include_resolved'] in [True, 'true', '1']
        pattern_analysis = params['pattern_analysis'] in [True, 'true', '1']

        # Ensure required domains
        if not ensure_domain_available(CDPDomain.RUNTIME, "track_promise_errors"):
            return create_domain_error_response(CDPDomain.RUNTIME, "track_promise_errors")

        pool = get_global_pool()
        cdp = pool.acquire()

        try:
            # Promise tracking code
            promise_tracking_code = f"""
                (() => {{
                    return new Promise((resolve) => {{
                        const promiseAnalysis = {{
                            unhandled_rejections: [],
                            promise_states: {{}},
                            error_patterns: {{}},
                            monitoring_start: Date.now(),
                            monitoring_duration_ms: {monitoring_duration * 1000}
                        }};

                        // Set up promise tracking
                        const originalPromise = Promise;
                        const trackedPromises = new Map();
                        let promiseCounter = 0;

                        // Track promise creation and state changes
                        if ({str(include_resolved).lower()}) {{
                            window.Promise = function(...args) {{
                                const promise = new originalPromise(...args);
                                const promiseId = ++promiseCounter;

                                trackedPromises.set(promiseId, {{
                                    created: Date.now(),
                                    state: 'pending',
                                    resolved: false,
                                    rejected: false
                                }});

                                promise.then(
                                    (value) => {{
                                        const tracked = trackedPromises.get(promiseId);
                                        if (tracked) {{
                                            tracked.state = 'resolved';
                                            tracked.resolved = true;
                                            tracked.resolved_at = Date.now();
                                        }}
                                        return value;
                                    }},
                                    (error) => {{
                                        const tracked = trackedPromises.get(promiseId);
                                        if (tracked) {{
                                            tracked.state = 'rejected';
                                            tracked.rejected = true;
                                            tracked.rejected_at = Date.now();
                                            tracked.error = error ? error.toString() : 'Unknown error';
                                        }}
                                        throw error;
                                    }}
                                );

                                return promise;
                            }};

                            // Copy static methods
                            Object.getOwnPropertyNames(originalPromise).forEach(name => {{
                                if (typeof originalPromise[name] === 'function') {{
                                    window.Promise[name] = originalPromise[name].bind(originalPromise);
                                }}
                            }});
                        }}

                        // Track unhandled rejections
                        const rejectionHandler = (event) => {{
                            promiseAnalysis.unhandled_rejections.push({{
                                reason: event.reason ? event.reason.toString() : 'Unknown',
                                timestamp: Date.now(),
                                stack: event.reason && event.reason.stack ? event.reason.stack : null
                            }});
                        }};

                        window.addEventListener('unhandledrejection', rejectionHandler);

                        // Monitor for specified duration
                        setTimeout(() => {{
                            window.removeEventListener('unhandledrejection', rejectionHandler);

                            // Restore original Promise if we replaced it
                            if ({str(include_resolved).lower()}) {{
                                window.Promise = originalPromise;

                                // Analyze tracked promises
                                promiseAnalysis.promise_states = {{
                                    total_created: trackedPromises.size,
                                    resolved: 0,
                                    rejected: 0,
                                    pending: 0
                                }};

                                trackedPromises.forEach(tracked => {{
                                    if (tracked.resolved) {{
                                        promiseAnalysis.promise_states.resolved++;
                                    }} else if (tracked.rejected) {{
                                        promiseAnalysis.promise_states.rejected++;
                                    }} else {{
                                        promiseAnalysis.promise_states.pending++;
                                    }}
                                }});
                            }}

                            // Pattern analysis
                            if ({str(pattern_analysis).lower()}) {{
                                const patterns = {{}};
                                promiseAnalysis.unhandled_rejections.forEach(rejection => {{
                                    if (rejection.reason) {{
                                        const pattern = rejection.reason.replace(/\\d+/g, 'N').replace(/['"]/g, '');
                                        patterns[pattern] = (patterns[pattern] || 0) + 1;
                                    }}
                                }});

                                promiseAnalysis.error_patterns = patterns;
                                promiseAnalysis.pattern_analysis = {{
                                    total_patterns: Object.keys(patterns).length,
                                    most_common_pattern: Object.keys(patterns).reduce((a, b) =>
                                        patterns[a] > patterns[b] ? a : b, ''),
                                    pattern_frequency: patterns
                                }};
                            }}

                            promiseAnalysis.monitoring_end = Date.now();
                            promiseAnalysis.actual_duration_ms = promiseAnalysis.monitoring_end - promiseAnalysis.monitoring_start;

                            resolve(promiseAnalysis);
                        }}, {monitoring_duration * 1000});
                    }});
                }})()
            """

            result = cdp.send_command('Runtime.evaluate', {
                'expression': promise_tracking_code,
                'returnByValue': True,
                'awaitPromise': True,
                'timeout': (monitoring_duration + 5) * 1000
            })

            promise_data = result.get('result', {}).get('result', {}).get('value')

            # Track endpoint usage
            track_endpoint_usage("track_promise_errors", [CDPDomain.RUNTIME], params)

            return jsonify(create_success_response({
                "promise_tracking": promise_data,
                "monitoring_duration_seconds": monitoring_duration,
                "include_resolved": include_resolved,
                "pattern_analysis": pattern_analysis
            }, "track_promise_errors", [CDPDomain.RUNTIME]))

        finally:
            pool.release(cdp)

    except Exception as e:
        return handle_cdp_error("track_promise_errors", e, params, "track_promise_errors")


@error_handling_routes.route('/cdp/errors/simulate', methods=['POST'])
def simulate_errors():
    """
    Simulate various error conditions for testing error handling

    @route POST /cdp/errors/simulate
    @param {string} error_type - Type of error to simulate
    @param {string} [custom_message] - Custom error message
    @param {boolean} [trigger_fallback] - Test fallback mechanisms
    @param {object} [error_params] - Additional error parameters
    @returns {object} Error simulation results

    @example
    // Simulate TypeError
    POST {"error_type": "TypeError", "custom_message": "Test error"}

    // Simulate network error with fallback testing
    POST {
      "error_type": "NetworkError",
      "trigger_fallback": true,
      "error_params": {"endpoint": "/api/test"}
    }
    """
    try:
        data = request.get_json() or {}
        error_type = data.get('error_type', 'Error')
        custom_message = data.get('custom_message', 'Simulated error')
        trigger_fallback = data.get('trigger_fallback', False)
        error_params = data.get('error_params', {})

        if not error_type:
            return jsonify({
                "success": False,
                "error": "error_type parameter required"
            }), 400

        # Ensure required domains
        if not ensure_domain_available(CDPDomain.RUNTIME, "simulate_errors"):
            return create_domain_error_response(CDPDomain.RUNTIME, "simulate_errors")

        pool = get_global_pool()
        cdp = pool.acquire()

        try:
            # Error simulation code
            error_simulation_code = f"""
                (() => {{
                    const simulationResults = {{
                        error_type: '{error_type}',
                        custom_message: '{custom_message}',
                        trigger_fallback: {str(trigger_fallback).lower()},
                        simulation_start: Date.now(),
                        error_caught: false,
                        fallback_triggered: false,
                        error_details: null,
                        recovery_success: false
                    }};

                    try {{
                        // Simulate different error types
                        switch ('{error_type}') {{
                            case 'TypeError':
                                const obj = null;
                                obj.someMethod(); // Will throw TypeError
                                break;

                            case 'ReferenceError':
                                undefinedVariable.property; // Will throw ReferenceError
                                break;

                            case 'SyntaxError':
                                eval('{{ invalid syntax }}'); // Will throw SyntaxError
                                break;

                            case 'RangeError':
                                const arr = new Array(-1); // Will throw RangeError
                                break;

                            case 'NetworkError':
                                throw new Error('Network request failed: {custom_message}');

                            case 'Custom':
                                throw new Error('{custom_message}');

                            default:
                                throw new Error(`Simulated ${{'{error_type}'}}: {custom_message}`);
                        }}

                    }} catch (error) {{
                        simulationResults.error_caught = true;
                        simulationResults.error_details = {{
                            name: error.name,
                            message: error.message,
                            stack: error.stack
                        }};

                        // Test fallback mechanism if requested
                        if ({str(trigger_fallback).lower()}) {{
                            try {{
                                // Simulate fallback logic
                                simulationResults.fallback_triggered = true;

                                // Example fallback mechanisms
                                switch ('{error_type}') {{
                                    case 'NetworkError':
                                        // Simulate retry or alternative endpoint
                                        simulationResults.fallback_action = 'Attempted alternative endpoint';
                                        simulationResults.recovery_success = true;
                                        break;

                                    case 'TypeError':
                                        // Simulate null check fallback
                                        simulationResults.fallback_action = 'Applied null safety checks';
                                        simulationResults.recovery_success = true;
                                        break;

                                    default:
                                        simulationResults.fallback_action = 'Generic error recovery attempted';
                                        simulationResults.recovery_success = Math.random() > 0.3; // 70% success rate
                                }}

                            }} catch (fallbackError) {{
                                simulationResults.fallback_error = {{
                                    name: fallbackError.name,
                                    message: fallbackError.message
                                }};
                                simulationResults.recovery_success = false;
                            }}
                        }}
                    }}

                    simulationResults.simulation_end = Date.now();
                    simulationResults.duration_ms = simulationResults.simulation_end - simulationResults.simulation_start;

                    // Add error handling recommendations
                    simulationResults.recommendations = [];

                    switch ('{error_type}') {{
                        case 'TypeError':
                            simulationResults.recommendations.push('Add null/undefined checks before accessing properties');
                            simulationResults.recommendations.push('Use optional chaining (?.) operator');
                            break;
                        case 'ReferenceError':
                            simulationResults.recommendations.push('Verify variable declarations and scope');
                            simulationResults.recommendations.push('Use strict mode to catch undeclared variables');
                            break;
                        case 'NetworkError':
                            simulationResults.recommendations.push('Implement retry logic with exponential backoff');
                            simulationResults.recommendations.push('Provide offline fallback functionality');
                            break;
                        default:
                            simulationResults.recommendations.push('Implement comprehensive error boundaries');
                            simulationResults.recommendations.push('Add logging and monitoring for error patterns');
                    }}

                    return simulationResults;
                }})()
            """

            result = cdp.send_command('Runtime.evaluate', {
                'expression': error_simulation_code,
                'returnByValue': True,
                'timeout': 10000
            })

            simulation_data = result.get('result', {}).get('result', {}).get('value')

            # Track endpoint usage
            track_endpoint_usage("simulate_errors", [CDPDomain.RUNTIME], data)

            return jsonify(create_success_response({
                "error_simulation": simulation_data,
                "parameters": {
                    "error_type": error_type,
                    "custom_message": custom_message,
                    "trigger_fallback": trigger_fallback,
                    "error_params": error_params
                }
            }, "simulate_errors", [CDPDomain.RUNTIME]))

        finally:
            pool.release(cdp)

    except Exception as e:
        return handle_cdp_error("simulate_errors", e, data, "simulate_errors")


@error_handling_routes.route('/cdp/state/corrupt', methods=['POST'])
def test_state_corruption():
    """
    Test application state corruption and recovery mechanisms

    @route POST /cdp/state/corrupt
    @param {string} corruption_type - Type of state corruption to test
    @param {boolean} [test_recovery] - Test recovery mechanisms
    @param {object} [corruption_params] - Corruption parameters
    @returns {object} State corruption test results

    @example
    // Test localStorage corruption
    POST {"corruption_type": "localStorage", "test_recovery": true}

    // Test DOM state corruption
    POST {
      "corruption_type": "DOM",
      "corruption_params": {"target": "form", "corruption_level": "moderate"}
    }
    """
    try:
        data = request.get_json() or {}
        corruption_type = data.get('corruption_type', 'general')
        test_recovery = data.get('test_recovery', False)
        corruption_params = data.get('corruption_params', {})

        # Ensure required domains
        if not ensure_domain_available(CDPDomain.RUNTIME, "test_state_corruption"):
            return create_domain_error_response(CDPDomain.RUNTIME, "test_state_corruption")

        if not ensure_domain_available(CDPDomain.DOM, "test_state_corruption"):
            return create_domain_error_response(CDPDomain.DOM, "test_state_corruption")

        pool = get_global_pool()
        cdp = pool.acquire()

        try:
            # State corruption testing code
            corruption_test_code = f"""
                (() => {{
                    const corruptionResults = {{
                        corruption_type: '{corruption_type}',
                        test_recovery: {str(test_recovery).lower()},
                        corruption_start: Date.now(),
                        original_state: {{}},
                        corrupted_state: {{}},
                        corruption_successful: false,
                        recovery_attempted: false,
                        recovery_successful: false,
                        side_effects: []
                    }};

                    try {{
                        // Capture original state
                        switch ('{corruption_type}') {{
                            case 'localStorage':
                                corruptionResults.original_state.localStorage_length = localStorage.length;
                                corruptionResults.original_state.localStorage_keys = Object.keys(localStorage);

                                // Corrupt localStorage
                                localStorage.setItem('_cdp_corrupt_key', 'corrupt_value');
                                localStorage.setItem('null', null);
                                localStorage.setItem('undefined', undefined);

                                corruptionResults.corrupted_state.localStorage_length = localStorage.length;
                                corruptionResults.corruption_successful = true;
                                break;

                            case 'sessionStorage':
                                corruptionResults.original_state.sessionStorage_length = sessionStorage.length;

                                // Corrupt sessionStorage
                                sessionStorage.setItem('_cdp_corrupt_session', JSON.stringify({{ corrupted: true }}));

                                corruptionResults.corrupted_state.sessionStorage_length = sessionStorage.length;
                                corruptionResults.corruption_successful = true;
                                break;

                            case 'DOM':
                                const targetSelector = '{corruption_params.get("target", "body")}';
                                const targetElement = document.querySelector(targetSelector);

                                if (targetElement) {{
                                    corruptionResults.original_state.dom_structure = {{
                                        tag_name: targetElement.tagName,
                                        children_count: targetElement.children.length,
                                        class_name: targetElement.className
                                    }};

                                    // Corrupt DOM structure
                                    const corruptElement = document.createElement('div');
                                    corruptElement.id = '_cdp_corrupt_element';
                                    corruptElement.innerHTML = '<script>console.log("DOM corrupted")</script>';
                                    targetElement.appendChild(corruptElement);

                                    corruptionResults.corrupted_state.dom_structure = {{
                                        children_count: targetElement.children.length,
                                        corruption_element_added: true
                                    }};
                                    corruptionResults.corruption_successful = true;
                                }} else {{
                                    corruptionResults.side_effects.push(`Target element '${{targetSelector}}' not found`);
                                }}
                                break;

                            case 'global':
                                corruptionResults.original_state.global_props = Object.keys(window).length;

                                // Corrupt global state
                                window._cdp_corrupt_global = {{ corrupted: true, timestamp: Date.now() }};
                                window.undefined = "not_undefined";

                                corruptionResults.corrupted_state.global_props = Object.keys(window).length;
                                corruptionResults.corruption_successful = true;
                                break;

                            case 'form':
                                const forms = document.querySelectorAll('form');
                                corruptionResults.original_state.form_count = forms.length;

                                forms.forEach((form, index) => {{
                                    // Corrupt form data
                                    const inputs = form.querySelectorAll('input, textarea, select');
                                    inputs.forEach(input => {{
                                        if (input.type !== 'submit' && input.type !== 'button') {{
                                            input.value = '_cdp_corrupted_' + input.value;
                                        }}
                                    }});
                                }});

                                corruptionResults.corrupted_state.form_count = forms.length;
                                corruptionResults.corruption_successful = forms.length > 0;
                                break;

                            default:
                                corruptionResults.side_effects.push(`Unknown corruption type: {corruption_type}`);
                        }}

                        // Test recovery if requested
                        if ({str(test_recovery).lower()} && corruptionResults.corruption_successful) {{
                            corruptionResults.recovery_attempted = true;

                            switch ('{corruption_type}') {{
                                case 'localStorage':
                                    // Attempt localStorage recovery
                                    localStorage.removeItem('_cdp_corrupt_key');
                                    localStorage.removeItem('null');
                                    localStorage.removeItem('undefined');

                                    corruptionResults.recovery_successful =
                                        localStorage.length === corruptionResults.original_state.localStorage_length;
                                    break;

                                case 'sessionStorage':
                                    sessionStorage.removeItem('_cdp_corrupt_session');
                                    corruptionResults.recovery_successful =
                                        sessionStorage.length === corruptionResults.original_state.sessionStorage_length;
                                    break;

                                case 'DOM':
                                    const corruptElement = document.getElementById('_cdp_corrupt_element');
                                    if (corruptElement) {{
                                        corruptElement.remove();
                                        corruptionResults.recovery_successful = true;
                                    }}
                                    break;

                                case 'global':
                                    delete window._cdp_corrupt_global;
                                    delete window.undefined; // Can't actually restore undefined
                                    corruptionResults.recovery_successful = true;
                                    corruptionResults.side_effects.push('undefined global cannot be fully restored');
                                    break;

                                case 'form':
                                    const formsRecovery = document.querySelectorAll('form');
                                    formsRecovery.forEach(form => {{
                                        const inputs = form.querySelectorAll('input, textarea, select');
                                        inputs.forEach(input => {{
                                            if (input.value.startsWith('_cdp_corrupted_')) {{
                                                input.value = input.value.replace('_cdp_corrupted_', '');
                                            }}
                                        }});
                                    }});
                                    corruptionResults.recovery_successful = true;
                                    break;
                            }}
                        }}

                    }} catch (error) {{
                        corruptionResults.error = {{
                            name: error.name,
                            message: error.message,
                            stack: error.stack
                        }};
                        corruptionResults.side_effects.push(`Corruption failed: ${{error.message}}`);
                    }}

                    corruptionResults.corruption_end = Date.now();
                    corruptionResults.duration_ms = corruptionResults.corruption_end - corruptionResults.corruption_start;

                    // Add recommendations
                    corruptionResults.recommendations = [];
                    switch ('{corruption_type}') {{
                        case 'localStorage':
                        case 'sessionStorage':
                            corruptionResults.recommendations.push('Implement storage validation and cleanup');
                            corruptionResults.recommendations.push('Use try-catch blocks around storage operations');
                            break;
                        case 'DOM':
                            corruptionResults.recommendations.push('Use MutationObserver to detect unauthorized DOM changes');
                            corruptionResults.recommendations.push('Implement DOM state validation');
                            break;
                        case 'global':
                            corruptionResults.recommendations.push('Use strict mode to prevent global pollution');
                            corruptionResults.recommendations.push('Implement global state monitoring');
                            break;
                        case 'form':
                            corruptionResults.recommendations.push('Implement form data validation and sanitization');
                            corruptionResults.recommendations.push('Use form state management libraries');
                            break;
                    }}

                    return corruptionResults;
                }})()
            """

            result = cdp.send_command('Runtime.evaluate', {
                'expression': corruption_test_code,
                'returnByValue': True,
                'timeout': 15000
            })

            corruption_data = result.get('result', {}).get('result', {}).get('value')

            # Track endpoint usage
            track_endpoint_usage("test_state_corruption", [CDPDomain.RUNTIME, CDPDomain.DOM], data)

            return jsonify(create_success_response({
                "state_corruption_test": corruption_data,
                "parameters": {
                    "corruption_type": corruption_type,
                    "test_recovery": test_recovery,
                    "corruption_params": corruption_params
                }
            }, "test_state_corruption", [CDPDomain.RUNTIME, CDPDomain.DOM]))

        finally:
            pool.release(cdp)

    except Exception as e:
        return handle_cdp_error("test_state_corruption", e, data, "test_state_corruption")


@error_handling_routes.route('/cdp/errors/boundary_test', methods=['POST'])
def test_error_boundaries():
    """
    Test error boundary mechanisms and error propagation

    @route POST /cdp/errors/boundary_test
    @param {string} boundary_type - Type of error boundary to test
    @param {boolean} [test_propagation] - Test error propagation
    @param {number} [error_depth] - Depth of error propagation to test
    @returns {object} Error boundary test results

    @example
    // Test basic error boundary
    POST {"boundary_type": "try_catch", "test_propagation": true}

    // Test deep error propagation
    POST {
      "boundary_type": "nested",
      "test_propagation": true,
      "error_depth": 5
    }
    """
    try:
        data = request.get_json() or {}
        boundary_type = data.get('boundary_type', 'try_catch')
        test_propagation = data.get('test_propagation', False)
        error_depth = int(data.get('error_depth', 3))

        # Ensure required domains
        if not ensure_domain_available(CDPDomain.RUNTIME, "test_error_boundaries"):
            return create_domain_error_response(CDPDomain.RUNTIME, "test_error_boundaries")

        pool = get_global_pool()
        cdp = pool.acquire()

        try:
            # Error boundary testing code
            boundary_test_code = f"""
                (() => {{
                    const boundaryResults = {{
                        boundary_type: '{boundary_type}',
                        test_propagation: {str(test_propagation).lower()},
                        error_depth: {error_depth},
                        test_start: Date.now(),
                        boundaries_tested: [],
                        propagation_path: [],
                        boundary_effectiveness: {{}},
                        errors_caught: 0,
                        errors_uncaught: 0
                    }};

                    // Helper function to create nested error
                    const createNestedError = (depth) => {{
                        if (depth <= 0) {{
                            throw new Error(`Deep error at depth ${{depth}}`);
                        }}
                        return createNestedError(depth - 1);
                    }};

                    // Test different boundary types
                    try {{
                        switch ('{boundary_type}') {{
                            case 'try_catch':
                                boundaryResults.boundaries_tested.push('try_catch');
                                try {{
                                    throw new Error('Test error for try-catch boundary');
                                }} catch (error) {{
                                    boundaryResults.errors_caught++;
                                    boundaryResults.boundary_effectiveness.try_catch = 'effective';
                                    boundaryResults.propagation_path.push('caught_in_try_catch');
                                }}
                                break;

                            case 'nested':
                                boundaryResults.boundaries_tested.push('nested_try_catch');
                                try {{
                                    try {{
                                        try {{
                                            if ({str(test_propagation).lower()}) {{
                                                createNestedError({error_depth});
                                            }} else {{
                                                throw new Error('Nested boundary test');
                                            }}
                                        }} catch (innerError) {{
                                            boundaryResults.propagation_path.push('inner_catch');
                                            boundaryResults.errors_caught++;
                                            throw new Error(`Propagated: ${{innerError.message}}`);
                                        }}
                                    }} catch (middleError) {{
                                        boundaryResults.propagation_path.push('middle_catch');
                                        boundaryResults.errors_caught++;
                                        throw new Error(`Further propagated: ${{middleError.message}}`);
                                    }}
                                }} catch (outerError) {{
                                    boundaryResults.propagation_path.push('outer_catch');
                                    boundaryResults.errors_caught++;
                                    boundaryResults.boundary_effectiveness.nested = 'effective';
                                }}
                                break;

                            case 'promise_boundary':
                                boundaryResults.boundaries_tested.push('promise_catch');
                                return new Promise((resolve) => {{
                                    Promise.reject(new Error('Promise boundary test'))
                                        .catch(error => {{
                                            boundaryResults.errors_caught++;
                                            boundaryResults.propagation_path.push('promise_catch');
                                            boundaryResults.boundary_effectiveness.promise_boundary = 'effective';

                                            if ({str(test_propagation).lower()}) {{
                                                // Test promise chain propagation
                                                return Promise.reject(new Error('Propagated promise error'));
                                            }}
                                            return 'handled';
                                        }})
                                        .catch(error => {{
                                            boundaryResults.errors_caught++;
                                            boundaryResults.propagation_path.push('secondary_promise_catch');
                                            resolve(boundaryResults);
                                        }})
                                        .then(() => {{
                                            if (boundaryResults.propagation_path.length === 1) {{
                                                resolve(boundaryResults);
                                            }}
                                        }});
                                }});

                            case 'window_error':
                                boundaryResults.boundaries_tested.push('window_error_handler');

                                // Set up temporary error handler
                                const originalHandler = window.onerror;
                                window.onerror = (message, source, lineno, colno, error) => {{
                                    boundaryResults.errors_caught++;
                                    boundaryResults.propagation_path.push('window_error_handler');
                                    boundaryResults.boundary_effectiveness.window_error = 'effective';
                                    return true; // Prevent default handling
                                }};

                                // Trigger error
                                setTimeout(() => {{
                                    throw new Error('Window error boundary test');
                                }}, 10);

                                // Restore original handler after test
                                setTimeout(() => {{
                                    window.onerror = originalHandler;
                                }}, 100);

                                break;

                            case 'unhandled_rejection':
                                boundaryResults.boundaries_tested.push('unhandled_rejection_handler');

                                const originalRejectionHandler = window.onunhandledrejection;
                                window.onunhandledrejection = (event) => {{
                                    boundaryResults.errors_caught++;
                                    boundaryResults.propagation_path.push('unhandled_rejection_handler');
                                    boundaryResults.boundary_effectiveness.unhandled_rejection = 'effective';
                                    event.preventDefault();
                                }};

                                // Trigger unhandled rejection
                                Promise.reject(new Error('Unhandled rejection boundary test'));

                                setTimeout(() => {{
                                    window.onunhandledrejection = originalRejectionHandler;
                                }}, 100);

                                break;

                            default:
                                throw new Error(`Unknown boundary type: {boundary_type}`);
                        }}

                    }} catch (error) {{
                        boundaryResults.errors_uncaught++;
                        boundaryResults.test_error = {{
                            name: error.name,
                            message: error.message,
                            stack: error.stack
                        }};
                    }}

                    boundaryResults.test_end = Date.now();
                    boundaryResults.duration_ms = boundaryResults.test_end - boundaryResults.test_start;

                    // Analysis and recommendations
                    boundaryResults.analysis = {{
                        total_boundaries: boundaryResults.boundaries_tested.length,
                        effective_boundaries: Object.keys(boundaryResults.boundary_effectiveness).length,
                        error_containment_ratio: boundaryResults.errors_caught / (boundaryResults.errors_caught + boundaryResults.errors_uncaught) || 0,
                        propagation_depth: boundaryResults.propagation_path.length
                    }};

                    boundaryResults.recommendations = [];
                    if (boundaryResults.errors_uncaught > 0) {{
                        boundaryResults.recommendations.push('Implement additional error boundaries for uncaught errors');
                    }}
                    if (boundaryResults.propagation_path.length > 3) {{
                        boundaryResults.recommendations.push('Consider flattening error handling to reduce propagation complexity');
                    }}
                    if ('{boundary_type}' === 'nested' && boundaryResults.analysis.propagation_depth < {error_depth}) {{
                        boundaryResults.recommendations.push('Error boundaries may be too aggressive in stopping propagation');
                    }}

                    return boundaryResults;
                }})()
            """

            # Handle promise-returning boundary test
            if boundary_type == 'promise_boundary':
                result = cdp.send_command('Runtime.evaluate', {
                    'expression': boundary_test_code,
                    'returnByValue': True,
                    'awaitPromise': True,
                    'timeout': 15000
                })
            else:
                result = cdp.send_command('Runtime.evaluate', {
                    'expression': boundary_test_code,
                    'returnByValue': True,
                    'timeout': 15000
                })

            boundary_data = result.get('result', {}).get('result', {}).get('value')

            # Track endpoint usage
            track_endpoint_usage("test_error_boundaries", [CDPDomain.RUNTIME], data)

            return jsonify(create_success_response({
                "error_boundary_test": boundary_data,
                "parameters": {
                    "boundary_type": boundary_type,
                    "test_propagation": test_propagation,
                    "error_depth": error_depth
                }
            }, "test_error_boundaries", [CDPDomain.RUNTIME]))

        finally:
            pool.release(cdp)

    except Exception as e:
        return handle_cdp_error("test_error_boundaries", e, data, "test_error_boundaries")


@error_handling_routes.route('/cdp/errors/memory_leak', methods=['GET', 'POST'])
def detect_memory_leaks():
    """
    Detect potential memory leaks and analyze memory usage patterns

    @route GET/POST /cdp/errors/memory_leak
    @param {number} [monitoring_duration] - Duration to monitor in seconds
    @param {boolean} [force_gc] - Force garbage collection before monitoring
    @param {boolean} [detailed_analysis] - Perform detailed heap analysis
    @returns {object} Memory leak detection results

    @example
    // Basic memory leak detection
    GET /cdp/errors/memory_leak

    // Detailed analysis with garbage collection
    POST {
      "monitoring_duration": 30,
      "force_gc": true,
      "detailed_analysis": true
    }
    """
    try:
        params = parse_request_params(request, ['monitoring_duration', 'force_gc', 'detailed_analysis'])
        monitoring_duration = int(params['monitoring_duration'] or 10)
        force_gc = params['force_gc'] in [True, 'true', '1']
        detailed_analysis = params['detailed_analysis'] in [True, 'true', '1']

        # Ensure required domains
        if not ensure_domain_available(CDPDomain.RUNTIME, "detect_memory_leaks"):
            return create_domain_error_response(CDPDomain.RUNTIME, "detect_memory_leaks")

        pool = get_global_pool()
        cdp = pool.acquire()

        try:
            # Memory leak detection code
            memory_detection_code = f"""
                (() => {{
                    return new Promise((resolve) => {{
                        const memoryAnalysis = {{
                            monitoring_duration_seconds: {monitoring_duration},
                            force_gc: {str(force_gc).lower()},
                            detailed_analysis: {str(detailed_analysis).lower()},
                            start_time: Date.now(),
                            initial_memory: {{}},
                            final_memory: {{}},
                            memory_samples: [],
                            potential_leaks: [],
                            recommendations: []
                        }};

                        // Force garbage collection if supported and requested
                        if ({str(force_gc).lower()} && window.gc) {{
                            window.gc();
                            memoryAnalysis.gc_forced = true;
                        }} else if ({str(force_gc).lower()}) {{
                            memoryAnalysis.gc_forced = false;
                            memoryAnalysis.gc_note = 'GC not available (Chrome must be started with --js-flags="--expose-gc")';
                        }}

                        // Get initial memory snapshot
                        if (performance.memory) {{
                            memoryAnalysis.initial_memory = {{
                                used_js_heap_size: performance.memory.usedJSHeapSize,
                                total_js_heap_size: performance.memory.totalJSHeapSize,
                                js_heap_size_limit: performance.memory.jsHeapSizeLimit
                            }};
                        }} else {{
                            memoryAnalysis.initial_memory = {{ note: 'performance.memory not available' }};
                        }}

                        // Create test objects to potentially detect leaks
                        const testObjects = [];
                        const eventListeners = [];

                        // Create potential memory leak patterns
                        for (let i = 0; i < 100; i++) {{
                            // Large object creation
                            const largeObj = {{
                                id: i,
                                data: new Array(1000).fill(`test_data_${{i}}`),
                                timestamp: Date.now()
                            }};
                            testObjects.push(largeObj);

                            // Event listener without cleanup (potential leak)
                            if (i < 10) {{
                                const handler = () => console.log(`Handler ${{i}}`);
                                document.addEventListener('test_event_' + i, handler);
                                eventListeners.push({{ event: 'test_event_' + i, handler }});
                            }}
                        }}

                        // Monitor memory over time
                        const sampleInterval = Math.max(1000, Math.floor(({monitoring_duration} * 1000) / 10));
                        let sampleCount = 0;
                        const maxSamples = Math.floor({monitoring_duration} * 1000 / sampleInterval);

                        const memoryMonitor = setInterval(() => {{
                            if (performance.memory) {{
                                const sample = {{
                                    timestamp: Date.now(),
                                    used_js_heap_size: performance.memory.usedJSHeapSize,
                                    total_js_heap_size: performance.memory.totalJSHeapSize,
                                    test_objects_count: testObjects.length
                                }};
                                memoryAnalysis.memory_samples.push(sample);
                            }}

                            sampleCount++;
                            if (sampleCount >= maxSamples) {{
                                clearInterval(memoryMonitor);
                                finishAnalysis();
                            }}
                        }}, sampleInterval);

                        const finishAnalysis = () => {{
                            // Get final memory snapshot
                            if (performance.memory) {{
                                memoryAnalysis.final_memory = {{
                                    used_js_heap_size: performance.memory.usedJSHeapSize,
                                    total_js_heap_size: performance.memory.totalJSHeapSize,
                                    js_heap_size_limit: performance.memory.jsHeapSizeLimit
                                }};

                                // Calculate memory growth
                                const initialUsed = memoryAnalysis.initial_memory.used_js_heap_size || 0;
                                const finalUsed = memoryAnalysis.final_memory.used_js_heap_size || 0;
                                memoryAnalysis.memory_growth = {{
                                    absolute_bytes: finalUsed - initialUsed,
                                    percentage: initialUsed > 0 ? ((finalUsed - initialUsed) / initialUsed) * 100 : 0
                                }};
                            }}

                            // Analyze memory patterns
                            if (memoryAnalysis.memory_samples.length > 2) {{
                                const samples = memoryAnalysis.memory_samples;
                                let increasingTrend = 0;
                                let decreasingTrend = 0;

                                for (let i = 1; i < samples.length; i++) {{
                                    if (samples[i].used_js_heap_size > samples[i-1].used_js_heap_size) {{
                                        increasingTrend++;
                                    }} else if (samples[i].used_js_heap_size < samples[i-1].used_js_heap_size) {{
                                        decreasingTrend++;
                                    }}
                                }}

                                memoryAnalysis.trend_analysis = {{
                                    increasing_samples: increasingTrend,
                                    decreasing_samples: decreasingTrend,
                                    stable_samples: samples.length - 1 - increasingTrend - decreasingTrend,
                                    trend: increasingTrend > decreasingTrend ? 'increasing' :
                                           decreasingTrend > increasingTrend ? 'decreasing' : 'stable'
                                }};

                                // Detect potential leaks
                                if (increasingTrend > samples.length * 0.7) {{
                                    memoryAnalysis.potential_leaks.push({{
                                        type: 'continuous_growth',
                                        severity: 'high',
                                        description: 'Memory usage shows continuous growth pattern'
                                    }});
                                }}

                                if (memoryAnalysis.memory_growth && memoryAnalysis.memory_growth.percentage > 20) {{
                                    memoryAnalysis.potential_leaks.push({{
                                        type: 'significant_growth',
                                        severity: 'medium',
                                        description: `Memory grew by ${{memoryAnalysis.memory_growth.percentage.toFixed(1)}}% during monitoring`
                                    }});
                                }}
                            }}

                            // Detailed analysis
                            if ({str(detailed_analysis).lower()}) {{
                                // Check for common leak patterns
                                memoryAnalysis.leak_pattern_analysis = {{
                                    event_listeners_count: eventListeners.length,
                                    test_objects_count: testObjects.length,
                                    global_properties: Object.keys(window).length
                                }};

                                // Check for detached DOM nodes (simplified)
                                const allElements = document.querySelectorAll('*');
                                memoryAnalysis.dom_analysis = {{
                                    total_elements: allElements.length,
                                    elements_with_listeners: 0
                                }};

                                // Count elements with event listeners (approximation)
                                allElements.forEach(el => {{
                                    if (el._events || el.onclick || el.onload) {{
                                        memoryAnalysis.dom_analysis.elements_with_listeners++;
                                    }}
                                }});
                            }}

                            // Generate recommendations
                            if (memoryAnalysis.potential_leaks.length > 0) {{
                                memoryAnalysis.recommendations.push('Investigate continuous memory growth patterns');
                                memoryAnalysis.recommendations.push('Check for unreleased event listeners and DOM references');
                            }}

                            if (eventListeners.length > 0) {{
                                memoryAnalysis.recommendations.push('Clean up test event listeners created during analysis');
                            }}

                            if (memoryAnalysis.memory_growth && memoryAnalysis.memory_growth.absolute_bytes > 1000000) {{
                                memoryAnalysis.recommendations.push('Memory growth > 1MB detected - investigate large object allocations');
                            }}

                            // Cleanup test objects and listeners
                            testObjects.length = 0;
                            eventListeners.forEach(listener => {{
                                document.removeEventListener(listener.event, listener.handler);
                            }});

                            memoryAnalysis.end_time = Date.now();
                            memoryAnalysis.total_duration_ms = memoryAnalysis.end_time - memoryAnalysis.start_time;

                            resolve(memoryAnalysis);
                        }};

                        // Start monitoring immediately if duration is 0
                        if ({monitoring_duration} === 0) {{
                            setTimeout(finishAnalysis, 100);
                        }}
                    }});
                }})()
            """

            result = cdp.send_command('Runtime.evaluate', {
                'expression': memory_detection_code,
                'returnByValue': True,
                'awaitPromise': True,
                'timeout': (monitoring_duration + 10) * 1000
            })

            memory_data = result.get('result', {}).get('result', {}).get('value')

            # Track endpoint usage
            track_endpoint_usage("detect_memory_leaks", [CDPDomain.RUNTIME], params)

            return jsonify(create_success_response({
                "memory_leak_analysis": memory_data,
                "parameters": {
                    "monitoring_duration": monitoring_duration,
                    "force_gc": force_gc,
                    "detailed_analysis": detailed_analysis
                }
            }, "detect_memory_leaks", [CDPDomain.RUNTIME]))

        finally:
            pool.release(cdp)

    except Exception as e:
        return handle_cdp_error("detect_memory_leaks", e, params, "detect_memory_leaks")


@error_handling_routes.route('/cdp/errors/performance_impact', methods=['GET', 'POST'])
def analyze_error_performance_impact():
    """
    Analyze the performance impact of errors and exception handling

    @route GET/POST /cdp/errors/performance_impact
    @param {number} [test_iterations] - Number of test iterations
    @param {boolean} [include_timing] - Include detailed timing analysis
    @param {string} [error_scenario] - Specific error scenario to test
    @returns {object} Performance impact analysis

    @example
    // Basic performance impact analysis
    GET /cdp/errors/performance_impact

    // Detailed timing with specific scenario
    POST {
      "test_iterations": 1000,
      "include_timing": true,
      "error_scenario": "try_catch_overhead"
    }
    """
    try:
        params = parse_request_params(request, ['test_iterations', 'include_timing', 'error_scenario'])
        test_iterations = int(params['test_iterations'] or 100)
        include_timing = params['include_timing'] in [True, 'true', '1']
        error_scenario = params['error_scenario'] or 'general'

        # Ensure required domains
        if not ensure_domain_available(CDPDomain.RUNTIME, "analyze_error_performance_impact"):
            return create_domain_error_response(CDPDomain.RUNTIME, "analyze_error_performance_impact")

        pool = get_global_pool()
        cdp = pool.acquire()

        try:
            # Performance impact analysis code
            performance_analysis_code = f"""
                (() => {{
                    const performanceAnalysis = {{
                        test_iterations: {test_iterations},
                        include_timing: {str(include_timing).lower()},
                        error_scenario: '{error_scenario}',
                        analysis_start: performance.now(),
                        baseline_performance: {{}},
                        error_performance: {{}},
                        overhead_analysis: {{}},
                        timing_details: []
                    }};

                    // Baseline performance test (no errors)
                    const baselineStart = performance.now();
                    for (let i = 0; i < {test_iterations}; i++) {{
                        // Simple computation baseline
                        const result = Math.sqrt(i * 2) + Math.sin(i / 100);
                    }}
                    const baselineEnd = performance.now();
                    performanceAnalysis.baseline_performance = {{
                        duration_ms: baselineEnd - baselineStart,
                        iterations: {test_iterations},
                        avg_per_iteration_ms: (baselineEnd - baselineStart) / {test_iterations}
                    }};

                    // Error scenario performance tests
                    let errorTestStart, errorTestEnd;

                    switch ('{error_scenario}') {{
                        case 'try_catch_overhead':
                            errorTestStart = performance.now();
                            for (let i = 0; i < {test_iterations}; i++) {{
                                try {{
                                    const result = Math.sqrt(i * 2) + Math.sin(i / 100);
                                }} catch (e) {{
                                    // Empty catch block
                                }}
                            }}
                            errorTestEnd = performance.now();
                            break;

                        case 'exception_throwing':
                            errorTestStart = performance.now();
                            let exceptionsThrown = 0;
                            for (let i = 0; i < {test_iterations}; i++) {{
                                try {{
                                    if (i % 10 === 0) {{
                                        throw new Error('Test exception');
                                    }}
                                    const result = Math.sqrt(i * 2) + Math.sin(i / 100);
                                }} catch (e) {{
                                    exceptionsThrown++;
                                }}
                            }}
                            errorTestEnd = performance.now();
                            performanceAnalysis.exceptions_thrown = exceptionsThrown;
                            break;

                        case 'error_object_creation':
                            errorTestStart = performance.now();
                            for (let i = 0; i < {test_iterations}; i++) {{
                                const error = new Error(`Error ${{i}}`);
                                const result = Math.sqrt(i * 2) + Math.sin(i / 100);
                            }}
                            errorTestEnd = performance.now();
                            break;

                        case 'stack_trace_capture':
                            errorTestStart = performance.now();
                            for (let i = 0; i < {test_iterations}; i++) {{
                                try {{
                                    throw new Error(`Stack trace test ${{i}}`);
                                }} catch (e) {{
                                    const stack = e.stack; // Force stack trace capture
                                }}
                            }}
                            errorTestEnd = performance.now();
                            break;

                        case 'nested_try_catch':
                            errorTestStart = performance.now();
                            for (let i = 0; i < {test_iterations}; i++) {{
                                try {{
                                    try {{
                                        try {{
                                            const result = Math.sqrt(i * 2) + Math.sin(i / 100);
                                        }} catch (e3) {{}}
                                    }} catch (e2) {{}}
                                }} catch (e1) {{}}
                            }}
                            errorTestEnd = performance.now();
                            break;

                        default:
                            // General error handling test
                            errorTestStart = performance.now();
                            for (let i = 0; i < {test_iterations}; i++) {{
                                try {{
                                    if (i % 50 === 0) {{
                                        throw new Error('Random test error');
                                    }}
                                    const result = Math.sqrt(i * 2) + Math.sin(i / 100);
                                }} catch (e) {{
                                    // Handle error
                                }}
                            }}
                            errorTestEnd = performance.now();
                    }}

                    performanceAnalysis.error_performance = {{
                        duration_ms: errorTestEnd - errorTestStart,
                        iterations: {test_iterations},
                        avg_per_iteration_ms: (errorTestEnd - errorTestStart) / {test_iterations}
                    }};

                    // Calculate overhead
                    const overhead = performanceAnalysis.error_performance.duration_ms - performanceAnalysis.baseline_performance.duration_ms;
                    performanceAnalysis.overhead_analysis = {{
                        absolute_overhead_ms: overhead,
                        relative_overhead_percent: (overhead / performanceAnalysis.baseline_performance.duration_ms) * 100,
                        overhead_per_iteration_ms: overhead / {test_iterations},
                        performance_impact: overhead > 0 ? 'negative' : 'neutral'
                    }};

                    // Detailed timing analysis
                    if ({str(include_timing).lower()}) {{
                        // Micro-benchmark individual operations
                        const timingTests = [
                            {{
                                name: 'error_construction',
                                test: () => new Error('Test error')
                            }},
                            {{
                                name: 'try_catch_empty',
                                test: () => {{
                                    try {{
                                        return 42;
                                    }} catch (e) {{
                                        return null;
                                    }}
                                }}
                            }},
                            {{
                                name: 'throw_catch',
                                test: () => {{
                                    try {{
                                        throw new Error('Test');
                                    }} catch (e) {{
                                        return e.message;
                                    }}
                                }}
                            }}
                        ];

                        timingTests.forEach(test => {{
                            const iterations = Math.min(1000, {test_iterations});
                            const start = performance.now();

                            for (let i = 0; i < iterations; i++) {{
                                test.test();
                            }}

                            const end = performance.now();

                            performanceAnalysis.timing_details.push({{
                                operation: test.name,
                                total_ms: end - start,
                                avg_per_operation_ms: (end - start) / iterations,
                                iterations: iterations
                            }});
                        }});
                    }}

                    // Memory impact analysis
                    if (performance.memory) {{
                        performanceAnalysis.memory_impact = {{
                            heap_used_before: performanceAnalysis.baseline_performance.heap_used || 0,
                            heap_used_after: performance.memory.usedJSHeapSize,
                            memory_overhead: performance.memory.usedJSHeapSize - (performanceAnalysis.baseline_performance.heap_used || 0)
                        }};
                    }}

                    // Generate performance recommendations
                    performanceAnalysis.recommendations = [];

                    if (performanceAnalysis.overhead_analysis.relative_overhead_percent > 20) {{
                        performanceAnalysis.recommendations.push('Significant performance overhead detected - optimize error handling');
                    }}

                    if (performanceAnalysis.overhead_analysis.overhead_per_iteration_ms > 0.1) {{
                        performanceAnalysis.recommendations.push('High per-iteration overhead - consider reducing try-catch scope');
                    }}

                    if ('{error_scenario}' === 'stack_trace_capture') {{
                        performanceAnalysis.recommendations.push('Stack trace capture is expensive - use sparingly in production');
                    }}

                    if ('{error_scenario}' === 'nested_try_catch') {{
                        performanceAnalysis.recommendations.push('Nested try-catch blocks add overhead - flatten where possible');
                    }}

                    performanceAnalysis.analysis_end = performance.now();
                    performanceAnalysis.total_analysis_time = performanceAnalysis.analysis_end - performanceAnalysis.analysis_start;

                    return performanceAnalysis;
                }})()
            """

            result = cdp.send_command('Runtime.evaluate', {
                'expression': performance_analysis_code,
                'returnByValue': True,
                'timeout': 30000
            })

            performance_data = result.get('result', {}).get('result', {}).get('value')

            # Track endpoint usage
            track_endpoint_usage("analyze_error_performance_impact", [CDPDomain.RUNTIME], params)

            return jsonify(create_success_response({
                "performance_impact_analysis": performance_data,
                "parameters": {
                    "test_iterations": test_iterations,
                    "include_timing": include_timing,
                    "error_scenario": error_scenario
                }
            }, "analyze_error_performance_impact", [CDPDomain.RUNTIME]))

        finally:
            pool.release(cdp)

    except Exception as e:
        return handle_cdp_error("analyze_error_performance_impact", e, params, "analyze_error_performance_impact")


@error_handling_routes.route('/cdp/errors/recovery_validation', methods=['POST'])
def validate_error_recovery():
    """
    Validate error recovery mechanisms and resilience patterns

    @route POST /cdp/errors/recovery_validation
    @param {string} recovery_type - Type of recovery mechanism to validate
    @param {object} [recovery_config] - Configuration for recovery testing
    @param {boolean} [stress_test] - Apply stress testing to recovery
    @param {number} [failure_rate] - Simulated failure rate (0-1)
    @returns {object} Recovery validation results

    @example
    // Validate retry mechanism
    POST {
      "recovery_type": "retry_with_backoff",
      "recovery_config": {"max_retries": 3, "base_delay": 100}
    }

    // Stress test circuit breaker
    POST {
      "recovery_type": "circuit_breaker",
      "stress_test": true,
      "failure_rate": 0.3
    }
    """
    try:
        data = request.get_json() or {}
        recovery_type = data.get('recovery_type', 'general')
        recovery_config = data.get('recovery_config', {})
        stress_test = data.get('stress_test', False)
        failure_rate = float(data.get('failure_rate', 0.2))

        # Ensure required domains
        if not ensure_domain_available(CDPDomain.RUNTIME, "validate_error_recovery"):
            return create_domain_error_response(CDPDomain.RUNTIME, "validate_error_recovery")

        pool = get_global_pool()
        cdp = pool.acquire()

        try:
            # Recovery validation code
            recovery_validation_code = f"""
                (() => {{
                    return new Promise((resolve) => {{
                        const validationResults = {{
                            recovery_type: '{recovery_type}',
                            recovery_config: {recovery_config},
                            stress_test: {str(stress_test).lower()},
                            failure_rate: {failure_rate},
                            validation_start: Date.now(),
                            recovery_attempts: 0,
                            successful_recoveries: 0,
                            failed_recoveries: 0,
                            recovery_times: [],
                            resilience_score: 0
                        }};

                        // Mock service that can fail
                        const mockService = {{
                            call: function(shouldFail = Math.random() < {failure_rate}) {{
                                return new Promise((resolve, reject) => {{
                                    setTimeout(() => {{
                                        if (shouldFail) {{
                                            reject(new Error('Service temporarily unavailable'));
                                        }} else {{
                                            resolve({{ data: 'Success', timestamp: Date.now() }});
                                        }}
                                    }}, Math.random() * 50); // 0-50ms latency
                                }});
                            }}
                        }};

                        // Recovery mechanism implementations
                        const recoveryMechanisms = {{
                            retry_with_backoff: async (maxRetries = 3, baseDelay = 100) => {{
                                let attempts = 0;
                                let delay = baseDelay;

                                while (attempts < maxRetries) {{
                                    const attemptStart = Date.now();
                                    try {{
                                        const result = await mockService.call();
                                        validationResults.recovery_times.push(Date.now() - attemptStart);
                                        return {{ success: true, attempts: attempts + 1, result }};
                                    }} catch (error) {{
                                        attempts++;
                                        if (attempts >= maxRetries) {{
                                            return {{ success: false, attempts, error: error.message }};
                                        }}

                                        // Exponential backoff
                                        await new Promise(resolve => setTimeout(resolve, delay));
                                        delay *= 2;
                                    }}
                                }}
                            }},

                            circuit_breaker: (() => {{
                                let failures = 0;
                                let lastFailureTime = 0;
                                let state = 'closed'; // closed, open, half-open
                                const failureThreshold = 3;
                                const timeout = 1000; // 1 second

                                return async () => {{
                                    const now = Date.now();

                                    if (state === 'open') {{
                                        if (now - lastFailureTime > timeout) {{
                                            state = 'half-open';
                                        }} else {{
                                            return {{ success: false, state, reason: 'Circuit breaker open' }};
                                        }}
                                    }}

                                    try {{
                                        const result = await mockService.call();
                                        failures = 0;
                                        state = 'closed';
                                        return {{ success: true, state, result }};
                                    }} catch (error) {{
                                        failures++;
                                        lastFailureTime = now;

                                        if (failures >= failureThreshold) {{
                                            state = 'open';
                                        }}

                                        return {{ success: false, state, error: error.message, failures }};
                                    }}
                                }};
                            }})(),

                            fallback_chain: async () => {{
                                const fallbacks = [
                                    () => mockService.call(false), // Primary service
                                    () => Promise.resolve({{ data: 'Cached data', source: 'cache' }}), // Cache fallback
                                    () => Promise.resolve({{ data: 'Default data', source: 'default' }}) // Default fallback
                                ];

                                for (let i = 0; i < fallbacks.length; i++) {{
                                    try {{
                                        const result = await fallbacks[i]();
                                        return {{ success: true, fallback_level: i, result }};
                                    }} catch (error) {{
                                        if (i === fallbacks.length - 1) {{
                                            return {{ success: false, error: 'All fallbacks failed' }};
                                        }}
                                    }}
                                }}
                            }},

                            timeout_with_recovery: async (timeoutMs = 200) => {{
                                const timeoutPromise = new Promise((_, reject) => {{
                                    setTimeout(() => reject(new Error('Request timeout')), timeoutMs);
                                }});

                                try {{
                                    const result = await Promise.race([mockService.call(), timeoutPromise]);
                                    return {{ success: true, result }};
                                }} catch (error) {{
                                    // Recovery: try with longer timeout
                                    try {{
                                        const result = await Promise.race([
                                            mockService.call(),
                                            new Promise((_, reject) => setTimeout(() => reject(new Error('Extended timeout')), timeoutMs * 3))
                                        ]);
                                        return {{ success: true, result, recovered: true }};
                                    }} catch (recoveryError) {{
                                        return {{ success: false, error: recoveryError.message }};
                                    }}
                                }}
                            }}
                        }};

                        // Run recovery validation tests
                        const runValidation = async () => {{
                            const testIterations = {str(stress_test).lower()} ? 50 : 10;
                            const config = validationResults.recovery_config;

                            for (let i = 0; i < testIterations; i++) {{
                                validationResults.recovery_attempts++;
                                const testStart = Date.now();

                                let result;
                                switch ('{recovery_type}') {{
                                    case 'retry_with_backoff':
                                        result = await recoveryMechanisms.retry_with_backoff(
                                            config.max_retries || 3,
                                            config.base_delay || 100
                                        );
                                        break;

                                    case 'circuit_breaker':
                                        result = await recoveryMechanisms.circuit_breaker();
                                        break;

                                    case 'fallback_chain':
                                        result = await recoveryMechanisms.fallback_chain();
                                        break;

                                    case 'timeout_with_recovery':
                                        result = await recoveryMechanisms.timeout_with_recovery(config.timeout || 200);
                                        break;

                                    default:
                                        result = await recoveryMechanisms.retry_with_backoff();
                                }}

                                const testDuration = Date.now() - testStart;
                                validationResults.recovery_times.push(testDuration);

                                if (result.success) {{
                                    validationResults.successful_recoveries++;
                                }} else {{
                                    validationResults.failed_recoveries++;
                                }}

                                // Add small delay between tests in stress mode
                                if ({str(stress_test).lower()}) {{
                                    await new Promise(resolve => setTimeout(resolve, 10));
                                }}
                            }}

                            // Calculate resilience score
                            validationResults.resilience_score = (validationResults.successful_recoveries / validationResults.recovery_attempts) * 100;

                            // Analysis
                            validationResults.analysis = {{
                                success_rate: validationResults.resilience_score,
                                avg_recovery_time: validationResults.recovery_times.reduce((a, b) => a + b, 0) / validationResults.recovery_times.length,
                                max_recovery_time: Math.max(...validationResults.recovery_times),
                                min_recovery_time: Math.min(...validationResults.recovery_times),
                                total_test_duration: Date.now() - validationResults.validation_start
                            }};

                            // Recommendations
                            validationResults.recommendations = [];

                            if (validationResults.resilience_score < 80) {{
                                validationResults.recommendations.push('Low resilience score - consider improving recovery strategy');
                            }}

                            if (validationResults.analysis.avg_recovery_time > 1000) {{
                                validationResults.recommendations.push('High average recovery time - optimize recovery speed');
                            }}

                            if ('{recovery_type}' === 'retry_with_backoff' && validationResults.analysis.max_recovery_time > 5000) {{
                                validationResults.recommendations.push('Maximum retry time too high - consider circuit breaker pattern');
                            }}

                            if (validationResults.resilience_score > 95) {{
                                validationResults.recommendations.push('Excellent resilience - recovery mechanism is working well');
                            }}

                            validationResults.validation_end = Date.now();
                            resolve(validationResults);
                        }};

                        runValidation().catch(error => {{
                            validationResults.validation_error = {{
                                name: error.name,
                                message: error.message,
                                stack: error.stack
                            }};
                            resolve(validationResults);
                        }});
                    }});
                }})()
            """

            result = cdp.send_command('Runtime.evaluate', {
                'expression': recovery_validation_code,
                'returnByValue': True,
                'awaitPromise': True,
                'timeout': 60000
            })

            recovery_data = result.get('result', {}).get('result', {}).get('value')

            # Track endpoint usage
            track_endpoint_usage("validate_error_recovery", [CDPDomain.RUNTIME], data)

            return jsonify(create_success_response({
                "recovery_validation": recovery_data,
                "parameters": {
                    "recovery_type": recovery_type,
                    "recovery_config": recovery_config,
                    "stress_test": stress_test,
                    "failure_rate": failure_rate
                }
            }, "validate_error_recovery", [CDPDomain.RUNTIME]))

        finally:
            pool.release(cdp)

    except Exception as e:
        return handle_cdp_error("validate_error_recovery", e, data, "validate_error_recovery")