{% extends "base.html" %}

{% block title %}{{ post.title }} - {{ config.title }}{% endblock %}

{% block content %}
<div class="article-container">
    <article class="article-content">
        <header class="article-header">
            <h1 class="article-title">{{ post.title }}</h1>
            <div class="article-meta">
                <time class="article-date">{{ post.date }}</time>
                {% if post.language %}
                <span class="article-lang">{{ post.language }}</span>
                {% endif %}
            </div>
            <div class="article-actions">
                {% if post.markdown_url %}
                <a href="{{ post.markdown_url }}" class="action-btn markdown-btn" title="View Markdown">
                    📝 Markdown
                </a>
                {% endif %}
                {% if post.translation_url %}
                <a href="{{ post.translation_url }}" class="action-btn translation-btn" title="View Translation">
                    🌐 {% if post.language == 'ja' %}English{% else %}日本語{% endif %}
                </a>
                {% endif %}
            </div>
        </header>
        
        <div class="article-body">
            {{ post.content | safe }}
        </div>
        
        <!-- Comment Section -->
        <section class="comment-section">
            <div class="comment-container">
                <h3>Comments</h3>
                
                <!-- ATProto Auth Widget Container -->
                <div id="atproto-auth-widget" class="comment-auth"></div>
                
                <div id="commentForm" class="comment-form" style="display: none;">
                    <textarea id="commentText" placeholder="Share your thoughts..." rows="4"></textarea>
                    <button onclick="submitComment()" class="submit-btn">Post Comment</button>
                </div>
                
                <div id="commentsList" class="comments-list">
                    <!-- Comments will be loaded here -->
                </div>
            </div>
        </section>
    </article>
    
    <aside class="article-sidebar">
        <nav class="toc">
            <h3>Contents</h3>
            <div id="toc-content">
                <!-- TOC will be generated by JavaScript -->
            </div>
        </nav>
    </aside>
</div>
{% endblock %}

{% block sidebar %}
<!-- Include ATProto Libraries via script tags (more reliable than dynamic imports) -->
<script src="https://cdn.jsdelivr.net/npm/@atproto/oauth-client-browser@latest/dist/index.js"></script>
<script src="https://cdn.jsdelivr.net/npm/@atproto/api@latest/dist/index.js"></script>

<!-- Fallback: Try multiple CDNs -->
<script>
console.log('Checking ATProto library availability...');

// Check if libraries loaded successfully
if (typeof ATProto === 'undefined' && typeof window.ATProto === 'undefined') {
    console.log('Primary CDN failed, trying fallback...');
    
    // Create fallback script elements
    const fallbackScripts = [
        'https://unpkg.com/@atproto/oauth-client-browser@latest/dist/index.js',
        'https://esm.sh/@atproto/oauth-client-browser',
        'https://cdn.skypack.dev/@atproto/oauth-client-browser'
    ];
    
    // Load fallback scripts sequentially
    let scriptIndex = 0;
    function loadNextScript() {
        if (scriptIndex < fallbackScripts.length) {
            const script = document.createElement('script');
            script.src = fallbackScripts[scriptIndex];
            script.onload = () => {
                console.log(`Loaded from fallback CDN: ${fallbackScripts[scriptIndex]}`);
                window.atprotoLibrariesReady = true;
            };
            script.onerror = () => {
                console.log(`Failed to load from: ${fallbackScripts[scriptIndex]}`);
                scriptIndex++;
                loadNextScript();
            };
            document.head.appendChild(script);
        } else {
            console.error('All CDN fallbacks failed');
            window.atprotoLibrariesReady = false;
        }
    }
    
    loadNextScript();
} else {
    console.log('✅ ATProto libraries loaded from primary CDN');
    window.atprotoLibrariesReady = true;
}
</script>

<!-- Simple ATProto Widget (no external dependency) -->
<link rel="stylesheet" href="/atproto-auth-widget/dist/atproto-auth.min.css">

<script>
// Initialize auth widget
let authWidget = null;

document.addEventListener('DOMContentLoaded', function() {
    generateTableOfContents();
    initializeAuthWidget();
    loadComments();
});

function generateTableOfContents() {
    const tocContainer = document.getElementById('toc-content');
    const headings = document.querySelectorAll('.article-body h1, .article-body h2, .article-body h3, .article-body h4, .article-body h5, .article-body h6');
    
    if (headings.length === 0) {
        tocContainer.innerHTML = '<p class="no-toc">No headings found</p>';
        return;
    }
    
    const tocList = document.createElement('ul');
    tocList.className = 'toc-list';
    
    headings.forEach((heading, index) => {
        const id = `heading-${index}`;
        heading.id = id;
        
        const listItem = document.createElement('li');
        listItem.className = `toc-item toc-${heading.tagName.toLowerCase()}`;
        
        const link = document.createElement('a');
        link.href = `#${id}`;
        link.textContent = heading.textContent;
        link.className = 'toc-link';
        
        // Smooth scroll behavior
        link.addEventListener('click', function(e) {
            e.preventDefault();
            heading.scrollIntoView({ behavior: 'smooth' });
        });
        
        listItem.appendChild(link);
        tocList.appendChild(listItem);
    });
    
    tocContainer.appendChild(tocList);
}

// Initialize ATProto Auth Widget
async function initializeAuthWidget() {
    try {
        // Check WebCrypto API availability
        console.log('WebCrypto check:', {
            available: !!window.crypto && !!window.crypto.subtle,
            secureContext: window.isSecureContext,
            protocol: window.location.protocol,
            hostname: window.location.hostname
        });
        
        if (!window.crypto || !window.crypto.subtle) {
            throw new Error('WebCrypto API is not available. This requires HTTPS or localhost.');
        }
        
        if (!window.isSecureContext) {
            console.warn('Not in secure context - WebCrypto may not work properly');
        }
        
        // Simplified approach: Show manual OAuth form
        console.log('Using simplified OAuth approach...');
        showSimpleOAuthForm();
            // Fallback to widget initialization
            authWidget = await window.initATProtoWidget('#atproto-auth-widget', {
                clientId: clientId,
            onLogin: (session) => {
                console.log('User logged in:', session.handle);
                document.getElementById('commentForm').style.display = 'block';
            },
            onLogout: () => {
                console.log('User logged out');
                document.getElementById('commentForm').style.display = 'none';
            },
            onError: (error) => {
                console.error('ATProto Auth Error:', error);
                // Show user-friendly error message
                const authContainer = document.getElementById('atproto-auth-widget');
                if (authContainer) {
                    let errorMessage = 'Authentication service is temporarily unavailable.';
                    let suggestion = 'Please try refreshing the page.';
                    
                    if (error.message && error.message.includes('WebCrypto')) {
                        errorMessage = 'This feature requires a secure HTTPS connection.';
                        suggestion = 'Please ensure you are accessing via https://log.syui.ai';
                    }
                    
                    authContainer.innerHTML = `
                        <div class="atproto-auth__fallback">
                            <p>${errorMessage}</p>
                            <p>${suggestion}</p>
                            <details style="margin-top: 10px; font-size: 0.8em; color: #666;">
                                <summary>Technical details</summary>
                                <pre>${error.message || 'Unknown error'}</pre>
                            </details>
                        </div>
                    `;
                }
            },
            theme: 'default'
            });
        } else if (typeof window.ATProtoAuthWidget === 'function') {
            // Fallback to direct widget initialization
            authWidget = new window.ATProtoAuthWidget({
                containerSelector: '#atproto-auth-widget',
                clientId: clientId,
                onLogin: (session) => {
                    console.log('User logged in:', session.handle);
                    document.getElementById('commentForm').style.display = 'block';
                },
                onLogout: () => {
                    console.log('User logged out');
                    document.getElementById('commentForm').style.display = 'none';
                },
                onError: (error) => {
                    console.error('ATProto Auth Error:', error);
                    const authContainer = document.getElementById('atproto-auth-widget');
                    if (authContainer) {
                        authContainer.innerHTML = `
                            <div class="atproto-auth__fallback">
                                <p>Authentication service is temporarily unavailable.</p>
                                <p>Please try refreshing the page.</p>
                            </div>
                        `;
                    }
                },
                theme: 'default'
            });
            await authWidget.init();
        } else {
            throw new Error('ATProto widget not available');
        }
    } catch (error) {
        console.error('Failed to initialize auth widget:', error);
        // Show fallback UI
        const authContainer = document.getElementById('atproto-auth-widget');
        if (authContainer) {
            authContainer.innerHTML = `
                <div class="atproto-auth__fallback">
                    <p>Authentication widget failed to load.</p>
                    <p>Please check your internet connection and refresh the page.</p>
                </div>
            `;
        }
    }
}

async function submitComment() {
    const commentText = document.getElementById('commentText').value.trim();
    if (!commentText || !authWidget.isLoggedIn()) {
        alert('Please login and enter a comment');
        return;
    }
    
    try {
        const postSlug = '{{ post.slug }}';
        const postUrl = window.location.href;
        const createdAt = new Date().toISOString();
        
        // Create comment record using the auth widget
        const response = await authWidget.createRecord('ai.log.comment', {
            $type: 'ai.log.comment',
            text: commentText,
            post_slug: postSlug,
            post_url: postUrl,
            createdAt: createdAt
        });
        
        console.log('Comment posted:', response);
        document.getElementById('commentText').value = '';
        loadComments();
    } catch (error) {
        console.error('Comment submission failed:', error);
        alert('Failed to post comment: ' + error.message);
    }
}

function showAuthenticatedState(session) {
    const authContainer = document.getElementById('atproto-auth-widget');
    const agent = new window.ATProtoAgent(session);
    
    authContainer.innerHTML = `
        <div class="atproto-auth__authenticated">
            <p>✅ Authenticated as: <strong>${session.did}</strong></p>
            <button id="logout-btn" class="atproto-auth__button">Logout</button>
        </div>
    `;
    
    document.getElementById('logout-btn').onclick = async () => {
        await session.signOut();
        window.location.reload();
    };
    
    // Show comment form
    document.getElementById('commentForm').style.display = 'block';
    window.currentSession = session;
    window.currentAgent = agent;
}

function showLoginForm(oauthClient) {
    const authContainer = document.getElementById('atproto-auth-widget');
    
    authContainer.innerHTML = `
        <div class="atproto-auth__login">
            <h4>Login with ATProto</h4>
            <input type="text" id="handle-input" placeholder="user.bsky.social" />
            <button id="login-btn" class="atproto-auth__button">Connect</button>
        </div>
    `;
    
    document.getElementById('login-btn').onclick = async () => {
        const handle = document.getElementById('handle-input').value.trim();
        if (!handle) {
            alert('Please enter your handle');
            return;
        }
        
        try {
            const url = await oauthClient.authorize(handle);
            window.open(url, '_self', 'noopener');
        } catch (error) {
            console.error('OAuth authorization failed:', error);
            alert('Authentication failed: ' + error.message);
        }
    };
    
    // Enter key support
    document.getElementById('handle-input').onkeypress = (e) => {
        if (e.key === 'Enter') {
            document.getElementById('login-btn').click();
        }
    };
}

async function loadComments() {
    try {
        const commentsList = document.getElementById('commentsList');
        commentsList.innerHTML = '<p class="loading">Loading comments from ATProto network...</p>';
        
        // In a real implementation, you would query an aggregation service
        // For demo, show empty state
        setTimeout(() => {
            commentsList.innerHTML = '<p class="no-comments">Comments will appear here when posted via ATProto.</p>';
        }, 1000);
    } catch (error) {
        console.error('Failed to load comments:', error);
        document.getElementById('commentsList').innerHTML = '<p class="error">Failed to load comments</p>';
    }
}
</script>
{% endblock %}