// Global Artalk Initialization Function (Supports PJAX)
window.initArtalk = function() {
    if (!document.querySelector("#Comments")) return;
    
    // Check if configuration exists
    if (!window.artalkConfig) {
        console.warn('window.artalkConfig is not defined. Skipping Artalk init.');
        return;
    }

    // Check if Artalk library is loaded
    if (typeof Artalk === 'undefined') {
        console.warn('Artalk library is not loaded yet. Waiting for bundle...');
        return;
    }
    
    try {
        // Logic for caching Artalk configuration to speed up rendering
        // 1. Manual Refresh (F5): Request from server and save to localStorage
        // 2. PJAX: Load from localStorage if available
        
        // Initialize initialization count to track PJAX usage
        if (typeof window.artalkInitCount === 'undefined') {
            window.artalkInitCount = 0;
        }
        window.artalkInitCount++;

        var config = Object.assign({}, window.artalkConfig); // Clone config
        var server = config.server.replace(/\/$/, '');
        var confKey = 'artalk_conf_' + btoa(server);
        var cachedConf = null;

        // Try to read cache
        try {
            var raw = localStorage.getItem(confKey);
            if (raw) cachedConf = JSON.parse(raw);
        } catch(e) {
            console.warn('Failed to parse Artalk cache:', e);
        }

        // Decision: Use Cache or Fetch?
        // Use cache only if: 
        // 1. Not the first load (PJAX)
        // 2. Cache exists
        if (window.artalkInitCount > 1 && cachedConf) {
            // Merge cache into config
            // CAUTION: cachedConf contains page-specific data (like pageKey) from the previous page.
            // We must ensure current window.artalkConfig overwrites it.
            try {
                // Defensive copy to avoid mutating cached object
                var mergedConfig = Object.assign({}, config);
                Object.assign(mergedConfig, cachedConf); 
                Object.assign(mergedConfig, window.artalkConfig); // Re-apply current page config
                mergedConfig.useBackendConf = false; 

                // Attempt to init with cache
                window.artalk = Artalk.init(mergedConfig);
            } catch (initErr) {
                console.warn('Artalk init with cache failed, falling back to default:', initErr);
                localStorage.removeItem(confKey); // Clear bad cache
                window.artalk = Artalk.init(config); // Fallback to normal init
            }
        } else {
            // First load or no cache: Allow Artalk to fetch (useBackendConf defaults to true)
            window.artalk = Artalk.init(config);
        }
        
        var artalk = window.artalk; // Local reference

        // Sync Theme Mode Immediately
        var currentTheme = document.documentElement.getAttribute('data-theme');
        if (typeof artalk.setDarkMode === 'function') {
            artalk.setDarkMode(currentTheme === 'dark');
        }

        // Aggressive Config Saving Strategy
        var saveConf = function() {
            try {
                // Attempt to find the full configuration object
                // artalk.conf is the standard property in v2+
                // artalk.ctx.conf is for internal context access
                var remoteConf = artalk.conf || (artalk.ctx && artalk.ctx.conf);
                
                if (remoteConf) {
                    // Filter out non-serializable properties (like DOM elements, circular refs)
                    var safeConf = {};
                    for (var key in remoteConf) {
                        var val = remoteConf[key];
                        // Skip if value is a DOM element
                        if (val instanceof Element || val instanceof Node) continue;
                        // Skip if value is window or document
                        if (val === window || val === document) continue;
                        // Skip internal private properties starting with $ or _
                        if (key.startsWith('$') || key.startsWith('_')) continue;
                        // Only allow simple types or simple objects
                        var type = typeof val;
                        if (type === 'string' || type === 'number' || type === 'boolean' || val === null) {
                            safeConf[key] = val;
                        } else if (type === 'object') {
                            // Simple array check
                            if (Array.isArray(val)) {
                                safeConf[key] = val;
                            } else {
                                // For objects, deep check might be too expensive/complex here.
                                // We'll try to shallow copy if it looks like a plain object
                                // and doesn't have circular markers like 'el'
                                if (val.constructor === Object && !val.el && !val.$el) {
                                     safeConf[key] = val;
                                }
                            }
                        }
                    }

                    localStorage.setItem(confKey, JSON.stringify(safeConf));
                    // console.log('Artalk: Config cached to', confKey);
                }
            } catch(e) {
                console.error('Artalk saveConf error:', e);
            }
        };

        // Hook into multiple events to ensure we capture the config after it's loaded
        // 'conf-loaded' is the ideal event if supported
        artalk.on('conf-loaded', saveConf);
        
        // 'mounted' is when the widget is ready
        artalk.on('mounted', saveConf);
        
        // 'list-loaded' means comments (and likely config) are fetched
        artalk.on('list-loaded', saveConf);

        // Fallback: Poll check after a few seconds (for slow networks)
        setTimeout(saveConf, 2000);
        setTimeout(saveConf, 5000);

        // Handle list-loaded event for lazy loading avatars and animations
        artalk.on('list-loaded', function() {
            if (window.artalkConfig.aiComment) {
                var ai = window.artalkConfig.aiComment;
                var listBody = document.querySelector('.atk-list .atk-list-body');
                if (listBody && !listBody.querySelector('.atk-ai-comment')) {
                    var aiCommentHtml = `
                        <div class="atk-comment-wrap atk-comment atk-ai-comment" id="atk-comment-ai">
                            <div class="atk-avatar" uk-scrollspy="cls: uk-animation-scale-up; delay: 200">
                                <img src="${ai.avatar}" alt="${ai.name}">
                            </div>
                            <div class="atk-main" uk-scrollspy="cls: uk-animation-slide-right-small; delay: 300">
                                <div class="atk-header">
                                    <span class="atk-nick" uk-scrollspy="cls: uk-animation-slide-top-small; delay: 350">${ai.name}</span>
                                    <span class="atk-badge">${window.artalkConfig.aiBadge || 'AI'}</span>
                                    <span class="atk-date">${ai.date}</span>
                                </div>
                                <div class="atk-body">
                                    <div class="atk-content">${ai.content}</div>
                                </div>
                            </div>
                        </div>
                    `;
                    listBody.insertAdjacentHTML('afterbegin', aiCommentHtml);
                    
                    // Hide "No Comment" placeholder if it exists
                    var noComment = document.querySelector('.atk-list-no-comment');
                    if (noComment) {
                        noComment.style.display = 'none';
                    }
                }
            }

            // Add staggered animation to the comment list
            var list = document.querySelector('.atk-list');
            if (list) {
                list.setAttribute('uk-scrollspy', 'target: > .atk-comment-wrap; cls: uk-animation-slide-bottom-small; delay: 50');
            }

            // Apply granular animations to inner elements
            document.querySelectorAll('.atk-comment-wrap:not(.atk-ai-comment)').forEach(function(wrap) {
                var avatar = wrap.querySelector('.atk-avatar');
                if (avatar) avatar.setAttribute('uk-scrollspy', 'cls: uk-animation-scale-up; delay: 200');
                
                var main = wrap.querySelector('.atk-main');
                if (main) main.setAttribute('uk-scrollspy', 'cls: uk-animation-slide-right-small; delay: 300');
                
                var nick = wrap.querySelector('.atk-nick');
                if (nick) nick.setAttribute('uk-scrollspy', 'cls: uk-animation-slide-top-small; delay: 350');
            });

            // Find all avatars in the comment list
            // We let lazyload.js handle the avatars automatically by calling lazyLoadAgain()
            // which will find these new images, set the placeholder, and observe them.
            
            // Trigger lazy load update
            if (window.lazyLoadAgain) {
                window.lazyLoadAgain();
            }

            // Force hide "No Comment" if AI comment exists
            if (window.artalkConfig.aiComment) {
                var checkNoComment = setInterval(function() {
                    var noComment = document.querySelector('.atk-list-no-comment');
                    var aiComment = document.querySelector('.atk-ai-comment');
                    if (aiComment && noComment && noComment.style.display !== 'none') {
                        noComment.style.display = 'none';
                    }
                    if (!document.querySelector('#Comments')) {
                        clearInterval(checkNoComment);
                    }
                }, 500);
                
                // Clear interval after 10 seconds to save resources
                setTimeout(function() { clearInterval(checkNoComment); }, 10000);
            }
        });
        
    } catch (e) {
        console.error('Artalk init failed:', e);
    }
};