/**
 * ═══════════════════════════════════════════════════════════════════
 * HTS CRYPTO DASHBOARD - UNIFIED APPLICATION
 * Complete JavaScript Logic with WebSocket & API Integration
 * ═══════════════════════════════════════════════════════════════════
 */

// ═══════════════════════════════════════════════════════════════════
// CONFIGURATION
// ═══════════════════════════════════════════════════════════════════

// Auto-detect environment and set backend URLs
// Use relative URLs to avoid CORS issues - always use same origin
const getBackendURL = () => {
    // Always use current origin to avoid CORS issues
    return window.location.origin;
};

const getWebSocketURL = () => {
    // Use current origin for WebSocket to avoid CORS issues
    const protocol = window.location.protocol === "https:" ? "wss" : "ws";
    const host = window.location.host;
    return `${protocol}://${host}/ws`;
};

// Merge DASHBOARD_CONFIG if exists, but always use localhost detection for URLs
const baseConfig = window.DASHBOARD_CONFIG || {};
const backendURL = getBackendURL();
const wsURL = getWebSocketURL();
const CONFIG = {
    ...baseConfig,
    // Always override URLs with localhost detection
    BACKEND_URL: backendURL,
    WS_URL: wsURL,
    UPDATE_INTERVAL: baseConfig.UPDATE_INTERVAL || 30000, // 30 seconds
    CACHE_TTL: baseConfig.CACHE_TTL || 60000, // 1 minute
};

// Always use current origin to avoid CORS issues
CONFIG.BACKEND_URL = window.location.origin;
const wsProtocol = window.location.protocol === "https:" ? "wss" : "ws";
CONFIG.WS_URL = `${wsProtocol}://${window.location.host}/ws`;

// Log configuration for debugging
console.log('[Config] Backend URL:', CONFIG.BACKEND_URL);
console.log('[Config] WebSocket URL:', CONFIG.WS_URL);
console.log('[Config] Current hostname:', window.location.hostname);

// ═══════════════════════════════════════════════════════════════════
// WEBSOCKET CLIENT
// ═══════════════════════════════════════════════════════════════════

class WebSocketClient {
    constructor(url) {
        this.url = url;
        this.socket = null;
        this.status = 'disconnected';
        this.reconnectAttempts = 0;
        this.maxReconnectAttempts = 5;
        this.reconnectDelay = 3000;
        this.listeners = new Map();
        this.heartbeatInterval = null;
    }

    connect() {
        if (this.socket && this.socket.readyState === WebSocket.OPEN) {
            console.log('[WS] Already connected');
            return;
        }

        try {
            console.log('[WS] Connecting to:', this.url);
            this.socket = new WebSocket(this.url);
            
            this.socket.onopen = this.handleOpen.bind(this);
            this.socket.onmessage = this.handleMessage.bind(this);
            this.socket.onerror = this.handleError.bind(this);
            this.socket.onclose = this.handleClose.bind(this);
            
            this.updateStatus('connecting');
        } catch (error) {
            console.error('[WS] Connection error:', error);
            this.scheduleReconnect();
        }
    }

    handleOpen() {
        console.log('[WS] Connected successfully');
        this.status = 'connected';
        this.reconnectAttempts = 0;
        this.updateStatus('connected');
        this.startHeartbeat();
        this.emit('connected', true);
    }

    handleMessage(event) {
        try {
            const data = JSON.parse(event.data);
            console.log('[WS] Message received:', data.type);
            
            if (data.type === 'heartbeat') {
                this.send({ type: 'pong' });
                return;
            }
            
            this.emit(data.type, data);
            this.emit('message', data);
        } catch (error) {
            console.error('[WS] Message parse error:', error);
        }
    }

    handleError(error) {
        // WebSocket error events don't provide detailed error info
        // Check socket state to provide better error context
        const socketState = this.socket ? this.socket.readyState : 'null';
        const stateNames = {
            0: 'CONNECTING',
            1: 'OPEN',
            2: 'CLOSING',
            3: 'CLOSED'
        };
        
        const stateName = stateNames[socketState] || `UNKNOWN(${socketState})`;
        
        // Only log error once to prevent spam
        if (!this._errorLogged) {
            console.error('[WS] Connection error:', {
                url: this.url,
                state: stateName,
                readyState: socketState,
                message: 'WebSocket connection failed. Check if server is running and URL is correct.'
            });
            this._errorLogged = true;
            
            // Reset error flag after a delay to allow logging if error persists
            setTimeout(() => {
                this._errorLogged = false;
            }, 5000);
        }
        
        this.updateStatus('error');
        
        // Attempt reconnection if not already scheduled
        if (this.socket && this.socket.readyState === WebSocket.CLOSED && 
            this.reconnectAttempts < this.maxReconnectAttempts) {
            this.scheduleReconnect();
        }
    }

    handleClose() {
        console.log('[WS] Connection closed');
        this.status = 'disconnected';
        this.updateStatus('disconnected');
        this.stopHeartbeat();
        
        // Clean up socket reference
        if (this.socket) {
            try {
                // Remove event listeners to prevent memory leaks
                this.socket.onopen = null;
                this.socket.onclose = null;
                this.socket.onerror = null;
                this.socket.onmessage = null;
            } catch (e) {
                // Ignore errors during cleanup
            }
            // Don't nullify socket immediately - let it close naturally
            // this.socket = null; // Set to null after a short delay
        }
        
        this.emit('connected', false);
        this.scheduleReconnect();
    }

    scheduleReconnect() {
        if (this.reconnectAttempts >= this.maxReconnectAttempts) {
            console.error('[WS] Max reconnection attempts reached');
            return;
        }

        this.reconnectAttempts++;
        console.log(`[WS] Reconnecting in ${this.reconnectDelay}ms (attempt ${this.reconnectAttempts})`);
        
        setTimeout(() => this.connect(), this.reconnectDelay);
    }

    startHeartbeat() {
        // Clear any existing heartbeat
        if (this.heartbeatInterval) {
            clearInterval(this.heartbeatInterval);
        }
        
        this.heartbeatInterval = setInterval(() => {
            // Double-check connection state before sending heartbeat
            if (this.socket && this.socket.readyState === WebSocket.OPEN) {
                const sent = this.send({ type: 'ping' });
                if (!sent) {
                    // If send failed, stop heartbeat and try to reconnect
                    this.stopHeartbeat();
                    if (this.reconnectAttempts < this.maxReconnectAttempts) {
                        this.scheduleReconnect();
                    }
                }
            } else {
                // Connection is not open, stop heartbeat
                this.stopHeartbeat();
            }
        }, 30000);
    }

    stopHeartbeat() {
        if (this.heartbeatInterval) {
            clearInterval(this.heartbeatInterval);
            this.heartbeatInterval = null;
        }
    }

    send(data) {
        if (!this.socket) {
            console.warn('[WS] Cannot send - socket is null');
            return false;
        }
        
        // Check if socket is in a valid state for sending
        if (this.socket.readyState === WebSocket.OPEN) {
            try {
                this.socket.send(JSON.stringify(data));
                return true;
            } catch (error) {
                console.error('[WS] Error sending message:', error);
                // Mark as disconnected if send fails
                if (error.message && (error.message.includes('close') || error.message.includes('send'))) {
                    this.handleClose();
                }
                return false;
            }
        }
        
        console.warn('[WS] Cannot send - socket state:', this.socket.readyState);
        return false;
    }

    on(event, callback) {
        if (!this.listeners.has(event)) {
            this.listeners.set(event, []);
        }
        this.listeners.get(event).push(callback);
    }

    emit(event, data) {
        if (this.listeners.has(event)) {
            this.listeners.get(event).forEach(callback => callback(data));
        }
    }

    updateStatus(status) {
        this.status = status;
        
        const statusBar = document.getElementById('connection-status-bar');
        const statusDot = document.getElementById('ws-status-dot');
        const statusText = document.getElementById('ws-status-text');
        
        if (statusBar && statusDot && statusText) {
            if (status === 'connected') {
                statusBar.classList.remove('disconnected');
                statusText.textContent = 'متصل';
            } else if (status === 'disconnected' || status === 'error') {
                statusBar.classList.add('disconnected');
                statusText.textContent = status === 'error' ? 'خطا در اتصال' : 'قطع شده';
            } else {
                statusText.textContent = 'در حال اتصال...';
            }
        }
    }

    isConnected() {
        return this.socket && this.socket.readyState === WebSocket.OPEN;
    }

    disconnect() {
        this.stopHeartbeat();
        
        if (this.socket) {
            try {
                // Check if socket is still open before closing
                if (this.socket.readyState === WebSocket.OPEN || this.socket.readyState === WebSocket.CONNECTING) {
                    this.socket.close();
                }
            } catch (error) {
                console.warn('[WS] Error during disconnect:', error);
            } finally {
                // Clean up after a brief delay to allow close to complete
                setTimeout(() => {
                    try {
                        if (this.socket) {
                            this.socket.onopen = null;
                            this.socket.onclose = null;
                            this.socket.onerror = null;
                            this.socket.onmessage = null;
                            this.socket = null;
                        }
                    } catch (e) {
                        // Ignore errors during cleanup
                    }
                }, 100);
            }
        }
        
        this.status = 'disconnected';
        this.updateStatus('disconnected');
    }
}

// ═══════════════════════════════════════════════════════════════════
// API CLIENT
// ═══════════════════════════════════════════════════════════════════

class APIClient {
    constructor(baseURL) {
        this.baseURL = baseURL;
        this.cache = new Map();
    }

    async request(endpoint, options = {}) {
        const url = `${this.baseURL}${endpoint}`;
        const cacheKey = `${options.method || 'GET'}:${url}`;

        // Check cache
        if (options.cache && this.cache.has(cacheKey)) {
            const cached = this.cache.get(cacheKey);
            if (Date.now() - cached.timestamp < CONFIG.CACHE_TTL) {
                console.log('[API] Cache hit:', endpoint);
                return cached.data;
            }
        }

        try {
            console.log('[API] Request:', endpoint);
            const response = await fetch(url, {
                method: options.method || 'GET',
                headers: {
                    'Content-Type': 'application/json',
                    ...options.headers,
                },
                body: options.body ? JSON.stringify(options.body) : undefined,
            });

            if (!response.ok) {
                throw new Error(`HTTP ${response.status}: ${response.statusText}`);
            }

            const data = await response.json();

            // Cache successful GET requests
            if (!options.method || options.method === 'GET') {
                this.cache.set(cacheKey, {
                    data,
                    timestamp: Date.now(),
                });
            }

            return data;
        } catch (error) {
            console.error('[API] Error:', endpoint, error);
            throw error;
        }
    }

    // Market Data
    async getMarket() {
        return this.request('/api/market', { cache: true });
    }

    async getTrending() {
        return this.request('/api/trending', { cache: true });
    }

    async getSentiment() {
        return this.request('/api/sentiment', { cache: true });
    }

    async getStats() {
        return this.request('/api/market/stats', { cache: true });
    }

    // News
    async getNews(limit = 20) {
        return this.request(`/api/news/latest?limit=${limit}`, { cache: true });
    }

    // Providers
    async getProviders() {
        return this.request('/api/providers', { cache: true });
    }

    // Chart Data
    async getChartData(symbol, interval = '1h', limit = 100) {
        return this.request(`/api/ohlcv?symbol=${symbol}&interval=${interval}&limit=${limit}`, { cache: true });
    }
}

// ═══════════════════════════════════════════════════════════════════
// UTILITY FUNCTIONS
// ═══════════════════════════════════════════════════════════════════

const Utils = {
    formatCurrency(value) {
        if (value === null || value === undefined || isNaN(value)) {
            return '—';
        }
        const num = Number(value);
        if (Math.abs(num) >= 1e12) {
            return `$${(num / 1e12).toFixed(2)}T`;
        }
        if (Math.abs(num) >= 1e9) {
            return `$${(num / 1e9).toFixed(2)}B`;
        }
        if (Math.abs(num) >= 1e6) {
            return `$${(num / 1e6).toFixed(2)}M`;
        }
        if (Math.abs(num) >= 1e3) {
            return `$${(num / 1e3).toFixed(2)}K`;
        }
        return `$${num.toLocaleString(undefined, { 
            minimumFractionDigits: 2, 
            maximumFractionDigits: 2 
        })}`;
    },

    formatPercent(value) {
        if (value === null || value === undefined || isNaN(value)) {
            return '—';
        }
        const num = Number(value);
        const sign = num >= 0 ? '+' : '';
        return `${sign}${num.toFixed(2)}%`;
    },

    formatNumber(value) {
        if (value === null || value === undefined || isNaN(value)) {
            return '—';
        }
        return Number(value).toLocaleString();
    },

    formatDate(timestamp) {
        const date = new Date(timestamp);
        return date.toLocaleDateString('fa-IR', {
            year: 'numeric',
            month: 'long',
            day: 'numeric',
            hour: '2-digit',
            minute: '2-digit',
        });
    },

    getChangeClass(value) {
        if (value > 0) return 'positive';
        if (value < 0) return 'negative';
        return 'neutral';
    },

    showLoader(element) {
        if (element) {
            element.innerHTML = `
                <div class="loading-cell">
                    <div class="loader"></div>
                    در حال بارگذاری...
                </div>
            `;
        }
    },

    showError(element, message) {
        if (element) {
            element.innerHTML = `
                <div class="error-message">
                    <i class="fas fa-exclamation-circle"></i>
                    ${message}
                </div>
            `;
        }
    },

    debounce(func, wait) {
        let timeout;
        return function executedFunction(...args) {
            const later = () => {
                clearTimeout(timeout);
                func(...args);
            };
            clearTimeout(timeout);
            timeout = setTimeout(later, wait);
        };
    },
};

// ═══════════════════════════════════════════════════════════════════
// VIEW MANAGER
// ═══════════════════════════════════════════════════════════════════

class ViewManager {
    constructor() {
        this.currentView = 'overview';
        this.views = new Map();
        this.init();
    }

    init() {
        // Desktop navigation
        document.querySelectorAll('.nav-tab-btn').forEach(btn => {
            btn.addEventListener('click', (e) => {
                const view = btn.dataset.view;
                this.switchView(view);
            });
        });

        // Mobile navigation
        document.querySelectorAll('.mobile-nav-tab-btn').forEach(btn => {
            btn.addEventListener('click', (e) => {
                const view = btn.dataset.view;
                this.switchView(view);
            });
        });
    }

    switchView(viewName) {
        if (this.currentView === viewName) return;

        // Hide all views
        document.querySelectorAll('.view-section').forEach(section => {
            section.classList.remove('active');
        });

        // Show selected view
        const viewSection = document.getElementById(`view-${viewName}`);
        if (viewSection) {
            viewSection.classList.add('active');
        }

        // Update navigation buttons
        document.querySelectorAll('.nav-tab-btn, .mobile-nav-tab-btn').forEach(btn => {
            btn.classList.remove('active');
            if (btn.dataset.view === viewName) {
                btn.classList.add('active');
            }
        });

        this.currentView = viewName;
        console.log('[View] Switched to:', viewName);

        // Trigger view-specific updates
        this.triggerViewUpdate(viewName);
    }

    triggerViewUpdate(viewName) {
        const event = new CustomEvent('viewChange', { detail: { view: viewName } });
        document.dispatchEvent(event);
    }
}

// ═══════════════════════════════════════════════════════════════════
// DASHBOARD APPLICATION
// ═══════════════════════════════════════════════════════════════════

class DashboardApp {
    constructor() {
        this.ws = new WebSocketClient(CONFIG.WS_URL);
        this.api = new APIClient(CONFIG.BACKEND_URL);
        this.viewManager = new ViewManager();
        this.updateInterval = null;
        this.data = {
            market: null,
            sentiment: null,
            trending: null,
            news: [],
        };
    }

    async init() {
        console.log('[App] Initializing dashboard...');

        // Connect WebSocket
        this.ws.connect();
        this.setupWebSocketHandlers();

        // Setup UI handlers
        this.setupUIHandlers();

        // Load initial data
        await this.loadInitialData();

        // Start periodic updates
        this.startPeriodicUpdates();

        console.log('[App] Dashboard initialized successfully');
    }

    setupWebSocketHandlers() {
        this.ws.on('connected', (isConnected) => {
            console.log('[App] WebSocket connection status:', isConnected);
            if (isConnected) {
                this.ws.send({ type: 'subscribe', groups: ['market', 'sentiment'] });
            }
        });

        this.ws.on('market_update', (data) => {
            console.log('[App] Market update received');
            this.handleMarketUpdate(data);
        });

        this.ws.on('sentiment_update', (data) => {
            console.log('[App] Sentiment update received');
            this.handleSentimentUpdate(data);
        });

        this.ws.on('stats_update', (data) => {
            console.log('[App] Stats update received');
            this.updateOnlineUsers(data.active_connections || 0);
        });
    }

    setupUIHandlers() {
        // Theme toggle
        const themeToggle = document.getElementById('theme-toggle');
        if (themeToggle) {
            themeToggle.addEventListener('click', () => this.toggleTheme());
        }

        // Notifications
        const notificationsBtn = document.getElementById('notifications-btn');
        const notificationsPanel = document.getElementById('notifications-panel');
        const closeNotifications = document.getElementById('close-notifications');

        if (notificationsBtn && notificationsPanel) {
            notificationsBtn.addEventListener('click', () => {
                notificationsPanel.classList.toggle('active');
            });
        }

        if (closeNotifications && notificationsPanel) {
            closeNotifications.addEventListener('click', () => {
                notificationsPanel.classList.remove('active');
            });
        }

        // Refresh buttons
        const refreshCoins = document.getElementById('refresh-coins');
        if (refreshCoins) {
            refreshCoins.addEventListener('click', () => this.loadMarketData());
        }

        // Floating stats minimize
        const minimizeStats = document.getElementById('minimize-stats');
        const floatingStats = document.getElementById('floating-stats');
        if (minimizeStats && floatingStats) {
            minimizeStats.addEventListener('click', () => {
                floatingStats.classList.toggle('minimized');
            });
        }

        // Global search
        const globalSearch = document.getElementById('global-search');
        if (globalSearch) {
            globalSearch.addEventListener('input', Utils.debounce((e) => {
                this.handleSearch(e.target.value);
            }, 300));
        }

        // AI Tools
        this.setupAIToolHandlers();
    }

    setupAIToolHandlers() {
        const sentimentBtn = document.getElementById('sentiment-analysis-btn');
        const summaryBtn = document.getElementById('news-summary-btn');
        const predictionBtn = document.getElementById('price-prediction-btn');
        const patternBtn = document.getElementById('pattern-detection-btn');

        if (sentimentBtn) {
            sentimentBtn.addEventListener('click', () => this.runSentimentAnalysis());
        }

        if (summaryBtn) {
            summaryBtn.addEventListener('click', () => this.runNewsSummary());
        }

        if (predictionBtn) {
            predictionBtn.addEventListener('click', () => this.runPricePrediction());
        }

        if (patternBtn) {
            patternBtn.addEventListener('click', () => this.runPatternDetection());
        }

        const clearResults = document.getElementById('clear-results');
        const aiResults = document.getElementById('ai-results');
        if (clearResults && aiResults) {
            clearResults.addEventListener('click', () => {
                aiResults.style.display = 'none';
            });
        }
    }

    async loadInitialData() {
        this.showLoadingOverlay(true);

        try {
            await Promise.all([
                this.loadMarketData(),
                this.loadSentimentData(),
                this.loadTrendingData(),
                this.loadNewsData(),
            ]);
        } catch (error) {
            console.error('[App] Error loading initial data:', error);
        }

        this.showLoadingOverlay(false);
    }

    async loadMarketData() {
        try {
            const data = await this.api.getMarket();
            this.data.market = data;
            this.renderMarketStats(data);
            this.renderCoinsTable(data.cryptocurrencies || []);
        } catch (error) {
            console.error('[App] Error loading market data:', error);
        }
    }

    async loadSentimentData() {
        try {
            const data = await this.api.getSentiment();
            // Transform backend format (value, classification) to frontend format (bullish, neutral, bearish)
            const transformed = this.transformSentimentData(data);
            this.data.sentiment = transformed;
            this.renderSentiment(transformed);
        } catch (error) {
            console.error('[App] Error loading sentiment data:', error);
        }
    }

    transformSentimentData(data) {
        // Backend returns: { value: 0-100, classification: "extreme_fear"|"fear"|"neutral"|"greed"|"extreme_greed", ... }
        // Frontend expects: { bullish: %, neutral: %, bearish: % }
        if (!data) {
            return { bullish: 0, neutral: 100, bearish: 0 };
        }

        const value = data.value || 50;
        const classification = data.classification || 'neutral';

        // Convert value (0-100) to bullish/neutral/bearish distribution
        let bullish = 0;
        let neutral = 0;
        let bearish = 0;

        if (classification.includes('extreme_greed') || classification.includes('greed')) {
            bullish = Math.max(60, value);
            neutral = Math.max(20, 100 - value);
            bearish = 100 - bullish - neutral;
        } else if (classification.includes('extreme_fear') || classification.includes('fear')) {
            bearish = Math.max(60, 100 - value);
            neutral = Math.max(20, value);
            bullish = 100 - bearish - neutral;
        } else {
            // Neutral - distribute around center
            neutral = 40 + Math.abs(50 - value) * 0.4;
            const remaining = 100 - neutral;
            bullish = remaining * (value / 100);
            bearish = remaining - bullish;
        }

        // Ensure they sum to 100
        const total = bullish + neutral + bearish;
        if (total > 0) {
            bullish = Math.round((bullish / total) * 100);
            neutral = Math.round((neutral / total) * 100);
            bearish = 100 - bullish - neutral;
        }

        return {
            bullish,
            neutral,
            bearish,
            ...data // Keep original data for reference
        };
    }

    async loadTrendingData() {
        try {
            const data = await this.api.getTrending();
            this.data.trending = data;
        } catch (error) {
            console.error('[App] Error loading trending data:', error);
        }
    }

    async loadNewsData() {
        try {
            const data = await this.api.getNews(20);
            this.data.news = data.news || [];
            this.renderNews(this.data.news);
        } catch (error) {
            console.error('[App] Error loading news data:', error);
        }
    }

    renderMarketStats(data) {
        const totalMarketCap = document.getElementById('total-market-cap');
        const btcDominance = document.getElementById('btc-dominance');
        const volume24h = document.getElementById('volume-24h');

        if (totalMarketCap && data.total_market_cap) {
            totalMarketCap.textContent = Utils.formatCurrency(data.total_market_cap);
        }

        if (btcDominance && data.btc_dominance) {
            btcDominance.textContent = `${data.btc_dominance.toFixed(1)}%`;
        }

        if (volume24h && data.total_volume_24h) {
            volume24h.textContent = Utils.formatCurrency(data.total_volume_24h);
        }
    }

    renderCoinsTable(coins) {
        const tbody = document.getElementById('coins-table-body');
        if (!tbody) return;

        if (!coins || coins.length === 0) {
            tbody.innerHTML = '<tr><td colspan="7">داده‌ای یافت نشد</td></tr>';
            return;
        }

        tbody.innerHTML = coins.slice(0, 20).map((coin, index) => `
            <tr>
                <td>${index + 1}</td>
                <td>
                    <div style="display: flex; align-items: center; gap: 8px;">
                        <strong>${coin.symbol}</strong>
                        <span style="color: var(--text-muted); font-size: 0.875rem;">${coin.name}</span>
                    </div>
                </td>
                <td style="font-family: var(--font-mono);">${Utils.formatCurrency(coin.current_price)}</td>
                <td>
                    <span class="stat-change ${Utils.getChangeClass(coin.price_change_percentage_24h)}">
                        ${Utils.formatPercent(coin.price_change_percentage_24h)}
                    </span>
                </td>
                <td>${Utils.formatCurrency(coin.total_volume)}</td>
                <td>${Utils.formatCurrency(coin.market_cap)}</td>
                <td>
                    <button class="btn-ghost" onclick="app.viewCoinDetails('${coin.symbol}')">
                        <i class="fas fa-chart-line"></i>
                    </button>
                </td>
            </tr>
        `).join('');
    }

    renderSentiment(data) {
        if (!data) return;

        const bullish = data.bullish || 0;
        const neutral = data.neutral || 0;
        const bearish = data.bearish || 0;

        const bullishPercent = document.getElementById('bullish-percent');
        const neutralPercent = document.getElementById('neutral-percent');
        const bearishPercent = document.getElementById('bearish-percent');

        if (bullishPercent) bullishPercent.textContent = `${bullish}%`;
        if (neutralPercent) neutralPercent.textContent = `${neutral}%`;
        if (bearishPercent) bearishPercent.textContent = `${bearish}%`;

        // Update progress bars
        const progressBars = document.querySelectorAll('.sentiment-progress-bar');
        progressBars.forEach(bar => {
            if (bar.classList.contains('bullish')) {
                bar.style.width = `${bullish}%`;
            } else if (bar.classList.contains('neutral')) {
                bar.style.width = `${neutral}%`;
            } else if (bar.classList.contains('bearish')) {
                bar.style.width = `${bearish}%`;
            }
        });
    }

    renderNews(news) {
        const newsGrid = document.getElementById('news-grid');
        if (!newsGrid) return;

        if (!news || news.length === 0) {
            newsGrid.innerHTML = '<p>خبری یافت نشد</p>';
            return;
        }

        newsGrid.innerHTML = news.map(item => `
            <div class="news-card">
                ${item.image ? `<img src="${item.image}" alt="${item.title}" class="news-card-image">` : ''}
                <div class="news-card-content">
                    <h3 class="news-card-title">${item.title}</h3>
                    <div class="news-card-meta">
                        <span><i class="fas fa-clock"></i> ${Utils.formatDate(item.published_at || Date.now())}</span>
                        <span><i class="fas fa-newspaper"></i> ${item.source || 'Unknown'}</span>
                    </div>
                    <p class="news-card-excerpt">${item.description || item.summary || ''}</p>
                </div>
            </div>
        `).join('');
    }

    handleMarketUpdate(data) {
        if (data.data) {
            this.renderMarketStats(data.data);
            if (data.data.cryptocurrencies) {
                this.renderCoinsTable(data.data.cryptocurrencies);
            }
        }
    }

    handleSentimentUpdate(data) {
        if (data.data) {
            this.renderSentiment(data.data);
        }
    }

    updateOnlineUsers(count) {
        const activeUsersCount = document.getElementById('active-users-count');
        if (activeUsersCount) {
            activeUsersCount.textContent = count;
        }
    }

    startPeriodicUpdates() {
        this.updateInterval = setInterval(() => {
            console.log('[App] Periodic update triggered');
            this.loadMarketData();
            this.loadSentimentData();
        }, CONFIG.UPDATE_INTERVAL);
    }

    stopPeriodicUpdates() {
        if (this.updateInterval) {
            clearInterval(this.updateInterval);
            this.updateInterval = null;
        }
    }

    toggleTheme() {
        document.body.classList.toggle('light-theme');
        const icon = document.querySelector('#theme-toggle i');
        if (icon) {
            icon.classList.toggle('fa-moon');
            icon.classList.toggle('fa-sun');
        }
    }

    handleSearch(query) {
        console.log('[App] Search query:', query);
        // Implement search functionality
    }

    viewCoinDetails(symbol) {
        console.log('[App] View coin details:', symbol);
        // Switch to charts view and load coin data
        this.viewManager.switchView('charts');
    }

    showLoadingOverlay(show) {
        const overlay = document.getElementById('loading-overlay');
        if (overlay) {
            if (show) {
                overlay.classList.add('active');
            } else {
                overlay.classList.remove('active');
            }
        }
    }

    // AI Tool Methods
    async runSentimentAnalysis() {
        const aiResults = document.getElementById('ai-results');
        const aiResultsContent = document.getElementById('ai-results-content');
        
        if (!aiResults || !aiResultsContent) return;

        aiResults.style.display = 'block';
        aiResultsContent.innerHTML = '<div class="loader"></div> در حال تحلیل...';

        try {
            const data = await this.api.getSentiment();
            
            aiResultsContent.innerHTML = `
                <div class="ai-result-card">
                    <h4>نتایج تحلیل احساسات</h4>
                    <div class="sentiment-summary">
                        <div class="sentiment-summary-item">
                            <div class="summary-label">صعودی</div>
                            <div class="summary-value bullish">${data.bullish}%</div>
                        </div>
                        <div class="sentiment-summary-item">
                            <div class="summary-label">خنثی</div>
                            <div class="summary-value neutral">${data.neutral}%</div>
                        </div>
                        <div class="sentiment-summary-item">
                            <div class="summary-label">نزولی</div>
                            <div class="summary-value bearish">${data.bearish}%</div>
                        </div>
                    </div>
                    <p style="margin-top: 1rem; color: var(--text-muted);">
                        ${data.summary || 'تحلیل احساسات بازار بر اساس داده‌های جمع‌آوری شده از منابع مختلف'}
                    </p>
                </div>
            `;
        } catch (error) {
            aiResultsContent.innerHTML = `
                <div class="error-message">
                    <i class="fas fa-exclamation-circle"></i>
                    خطا در تحلیل: ${error.message}
                </div>
            `;
        }
    }

    async runNewsSummary() {
        const aiResults = document.getElementById('ai-results');
        const aiResultsContent = document.getElementById('ai-results-content');
        
        if (!aiResults || !aiResultsContent) return;

        aiResults.style.display = 'block';
        aiResultsContent.innerHTML = '<div class="loader"></div> در حال خلاصه‌سازی...';

        setTimeout(() => {
            aiResultsContent.innerHTML = `
                <div class="ai-result-card">
                    <h4>خلاصه اخبار</h4>
                    <p>قابلیت خلاصه‌سازی اخبار به زودی اضافه خواهد شد.</p>
                    <p style="color: var(--text-muted); font-size: 0.875rem;">
                        این قابلیت از مدل‌های Hugging Face برای خلاصه‌سازی متن استفاده می‌کند.
                    </p>
                </div>
            `;
        }, 1000);
    }

    async runPricePrediction() {
        const aiResults = document.getElementById('ai-results');
        const aiResultsContent = document.getElementById('ai-results-content');
        
        if (!aiResults || !aiResultsContent) return;

        aiResults.style.display = 'block';
        aiResultsContent.innerHTML = '<div class="loader"></div> در حال پیش‌بینی...';

        setTimeout(() => {
            aiResultsContent.innerHTML = `
                <div class="ai-result-card">
                    <h4>پیش‌بینی قیمت</h4>
                    <p>قابلیت پیش‌بینی قیمت به زودی اضافه خواهد شد.</p>
                    <p style="color: var(--text-muted); font-size: 0.875rem;">
                        این قابلیت از مدل‌های یادگیری ماشین برای پیش‌بینی روند قیمت استفاده می‌کند.
                    </p>
                </div>
            `;
        }, 1000);
    }

    async runPatternDetection() {
        const aiResults = document.getElementById('ai-results');
        const aiResultsContent = document.getElementById('ai-results-content');
        
        if (!aiResults || !aiResultsContent) return;

        aiResults.style.display = 'block';
        aiResultsContent.innerHTML = '<div class="loader"></div> در حال تشخیص الگو...';

        setTimeout(() => {
            aiResultsContent.innerHTML = `
                <div class="ai-result-card">
                    <h4>تشخیص الگو</h4>
                    <p>قابلیت تشخیص الگو به زودی اضافه خواهد شد.</p>
                    <p style="color: var(--text-muted); font-size: 0.875rem;">
                        این قابلیت الگوهای کندل استیک و تحلیل تکنیکال را شناسایی می‌کند.
                    </p>
                </div>
            `;
        }, 1000);
    }

    destroy() {
        this.stopPeriodicUpdates();
        this.ws.disconnect();
        console.log('[App] Dashboard destroyed');
    }
}

// ═══════════════════════════════════════════════════════════════════
// INITIALIZATION
// ═══════════════════════════════════════════════════════════════════

let app;

document.addEventListener('DOMContentLoaded', () => {
    console.log('[Main] DOM loaded, initializing application...');
    
    app = new DashboardApp();
    app.init();

    // Make app globally accessible for debugging
    window.app = app;
    
    console.log('[Main] Application ready');
});

// Cleanup on page unload
window.addEventListener('beforeunload', () => {
    if (app) {
        app.destroy();
    }
});

// Handle visibility change to pause/resume updates
document.addEventListener('visibilitychange', () => {
    if (document.hidden) {
        console.log('[Main] Page hidden, pausing updates');
        app.stopPeriodicUpdates();
    } else {
        console.log('[Main] Page visible, resuming updates');
        app.startPeriodicUpdates();
        app.loadMarketData();
    }
});

// Export for module usage
export { DashboardApp, APIClient, WebSocketClient, Utils };