{% extends "base.html" %}

{% block title %}Edit Article - {{ article.title }} - {{ super() }}{% endblock %}

{% block content %}
<div class="row mb-4">
    <div class="col-12">
        <nav aria-label="breadcrumb">
            <ol class="breadcrumb">
                <li class="breadcrumb-item"><a href="{{ url_for('main.index') }}">Home</a></li>
                <li class="breadcrumb-item"><a href="{{ url_for('admin.dashboard') }}">Admin</a></li>
                <li class="breadcrumb-item"><a href="{{ url_for('admin.article_list') }}">Articles</a></li>
                <li class="breadcrumb-item active" aria-current="page">Edit</li>
            </ol>
        </nav>
        <h1 class="mb-3">Edit Article</h1>
    </div>
</div>

<div class="row">
    <div class="col-12">
        <div class="card">
            <div class="card-body">
                <form method="POST">
                    <div class="row">
                        <div class="col-md-8">
                            <!-- Article Content -->
                            <div class="mb-4">
                                <h5>Article Content</h5>
                                <div class="mb-3">
                                    <label class="form-label">HTML Content</label>
                                    <textarea class="form-control" id="html_content" name="html_content" rows="15" required>{{ article.html_content }}</textarea>
                                    <div class="form-text">Edit the HTML content directly. Must maintain schema.org Article markup.</div>
                                </div>
                            </div>

                            <!-- SEO Fields -->
                            <div class="mb-4">
                                <h5>SEO Settings</h5>
                                <div class="row">
                                    <div class="col-12 mb-3">
                                        <label for="title" class="form-label">Title *</label>
                                        <input type="text" class="form-control" id="title" name="title" required maxlength="500" value="{{ request.form.title or article.title }}">
                                    </div>

                                    <div class="col-12 mb-3">
                                        <label for="description" class="form-label">Meta Description</label>
                                        <textarea class="form-control" id="description" name="description" rows="2" maxlength="500">{{ request.form.description or article.description or '' }}</textarea>
                                    </div>

                                    <div class="col-12 mb-3">
                                        <label for="keywords" class="form-label">Meta Keywords</label>
                                        <input type="text" class="form-control" id="keywords" name="keywords" value="{{ request.form.keywords or article.keywords or '' }}">
                                    </div>

                                    <div class="col-12 mb-3">
                                        <label for="canonical_url" class="form-label">Canonical URL</label>
                                        <input type="url" class="form-control" id="canonical_url" name="canonical_url" value="{{ request.form.canonical_url or article.canonical_url or '' }}">
                                    </div>

                                    <div class="col-12 mb-3">
                                        <label for="excerpt" class="form-label">Excerpt</label>
                                        <textarea class="form-control" id="excerpt" name="excerpt" rows="3">{{ request.form.excerpt or article.excerpt or '' }}</textarea>
                                    </div>
                                </div>
                            </div>
                        </div>

                        <div class="col-md-4">
                            <!-- Author & Publisher -->
                            <div class="mb-4">
                                <h5>Author & Publisher</h5>
                                <div class="mb-3">
                                    <label for="author_name" class="form-label">Author Name</label>
                                    <input type="text" class="form-control" id="author_name" name="author_name" value="{{ request.form.author_name or article.author_name or '' }}">
                                </div>

                                <div class="mb-3">
                                    <label for="author_url" class="form-label">Author URL</label>
                                    <input type="url" class="form-control" id="author_url" name="author_url" value="{{ request.form.author_url or article.author_url or '' }}">
                                </div>

                                <div class="mb-3">
                                    <label for="publisher_name" class="form-label">Publisher Name</label>
                                    <input type="text" class="form-control" id="publisher_name" name="publisher_name" value="{{ request.form.publisher_name or article.publisher_name or config.SITE_NAME }}">
                                </div>

                                <div class="mb-3">
                                    <label for="publisher_url" class="form-label">Publisher URL</label>
                                    <input type="url" class="form-control" id="publisher_url" name="publisher_url" value="{{ request.form.publisher_url or article.publisher_url or config.SITE_URL }}">
                                </div>
                            </div>

                            <!-- Featured Image -->
                            <div class="mb-4">
                                <h5>Featured Image</h5>
                                <div class="mb-3">
                                    <label for="image_url" class="form-label">Image URL</label>
                                    <input type="url" class="form-control" id="image_url" name="image_url" value="{{ request.form.image_url or article.image_url or '' }}">
                                </div>
                            </div>

                            <!-- Publishing Options -->
                            <div class="mb-4">
                                <h5>Publishing</h5>
                                <div class="form-check form-switch">
                                    <input class="form-check-input" type="checkbox" id="is_published" name="is_published" value="true" {% if article.is_published %}checked{% endif %}>
                                    <label class="form-check-label" for="is_published">Published</label>
                                </div>
                                <small class="text-muted d-block mt-1">Uncheck to save as draft</small>
                            </div>

                            <!-- Submit -->
                            <div class="d-grid gap-2">
                                <button type="submit" class="btn btn-primary btn-lg">
                                    <i class="fas fa-save me-1"></i> Update Article
                                </button>
                                <a href="{{ url_for('admin.article_list') }}" class="btn btn-outline-secondary">Cancel</a>
                            </div>
                        </div>
                    </div>
                </form>
            </div>
        </div>
    </div>
</div>
{% endblock %}

{% block extra_scripts %}
<script>
// Auto-extract SEO fields from HTML content using DOMParser
function extractSEOFromHTML(html) {
    const results = {
        title: null,
        description: null,
        keywords: null,
        canonical_url: null
    };
    
    try {
        // Parse HTML string into a DOM
        const parser = new DOMParser();
        const doc = parser.parseFromString(html, 'text/html');
        
        // Extract title from h1 with itemprop="headline"
        const h1 = doc.querySelector('h1[itemprop="headline"]');
        if (h1) {
            results.title = h1.textContent.trim();
        }
        
        // Extract meta description (prefer itemprop="description", fallback to name="description")
        const descMeta = doc.querySelector('meta[itemprop="description"], meta[name="description"]');
        if (descMeta) {
            results.description = descMeta.getAttribute('content')?.trim() || null;
        }
        
        // Extract meta keywords
        const keywordsMeta = doc.querySelector('meta[name="keywords"]');
        if (keywordsMeta) {
            results.keywords = keywordsMeta.getAttribute('content')?.trim() || null;
        }
        
        // Extract canonical URL
        const canonicalLink = doc.querySelector('link[rel="canonical"]');
        if (canonicalLink) {
            results.canonical_url = canonicalLink.getAttribute('href')?.trim() || null;
        }
    } catch (e) {
        console.error('Error parsing HTML for SEO extraction:', e);
    }
    
    return results;
}

// Auto-populate fields when HTML content changes (only if fields are empty)
document.getElementById('html_content')?.addEventListener('input', function() {
    const html = this.value;
    const seoData = extractSEOFromHTML(html);
    
    // Only auto-populate if field is empty
    if (seoData.title && !document.getElementById('title').value) {
        document.getElementById('title').value = seoData.title;
    }
    if (seoData.description && !document.getElementById('description').value) {
        document.getElementById('description').value = seoData.description;
    }
    if (seoData.keywords && !document.getElementById('keywords').value) {
        document.getElementById('keywords').value = seoData.keywords;
    }
    if (seoData.canonical_url && !document.getElementById('canonical_url').value) {
        document.getElementById('canonical_url').value = seoData.canonical_url;
    }
});
</script>
{% endblock %}