// Global state
let currentPage = 'dashboard';
let cloneHistory = [];
let settings = {
    outputDir: 'M:\\CLONEWEB\\cloned-sites',
    timeout: 30,
    retries: 3,
    excludedDomains: 'facebook.com\ntwitter.com\ninstagram.com\ngoogle-analytics.com\ngoogletagmanager.com'
};

// Initialize app
document.addEventListener('DOMContentLoaded', function () {
    initializeApp();
});

function initializeApp() {
    setupNavigation();
    setupThemeToggle();
    setupForms();
    checkServiceStatus();
    loadDashboard();
    loadHistory();
    loadSettings();

    // Auto-refresh status every 30 seconds
    setInterval(checkServiceStatus, 30000);
}

// Navigation
function setupNavigation() {
    const navItems = document.querySelectorAll('.nav-item');

    navItems.forEach(item => {
        item.addEventListener('click', (e) => {
            e.preventDefault();
            const page = item.getAttribute('data-page');
            navigateToPage(page);
        });
    });
}

function navigateToPage(page) {
    // Update nav items
    document.querySelectorAll('.nav-item').forEach(item => {
        item.classList.remove('active');
        if (item.getAttribute('data-page') === page) {
            item.classList.add('active');
        }
    });

    // Update pages
    document.querySelectorAll('.page').forEach(p => {
        p.classList.remove('active');
    });
    document.getElementById(page).classList.add('active');

    // Update page title
    const titles = {
        'dashboard': 'Dashboard',
        'new-clone': 'Nova Clonagem',
        'history': 'Histórico',
        'settings': 'Configurações'
    };
    document.getElementById('pageTitle').textContent = titles[page] || page;

    currentPage = page;

    // Refresh data when navigating
    if (page === 'dashboard') {
        loadDashboard();
    } else if (page === 'history') {
        loadHistory();
    }
}

// Theme Toggle
function setupThemeToggle() {
    const themeToggle = document.getElementById('themeToggle');

    // Load saved theme
    const savedTheme = localStorage.getItem('theme') || 'light';
    if (savedTheme === 'dark') {
        document.body.classList.add('dark-theme');
        themeToggle.checked = true;
    }

    themeToggle.addEventListener('change', () => {
        if (themeToggle.checked) {
            document.body.classList.add('dark-theme');
            localStorage.setItem('theme', 'dark');
        } else {
            document.body.classList.remove('dark-theme');
            localStorage.setItem('theme', 'light');
        }
    });
}

// Service Status - verifica o serviço WGET na porta 3002
async function checkServiceStatus() {
    const statusIndicator = document.getElementById('serviceStatus');

    try {
        // Verificar o serviço WGET via proxy do servidor (mesma origem)
        const response = await fetch('/api/health', {
            method: 'GET'
        });

        if (response.ok) {
            statusIndicator.className = 'status-indicator online';
            statusIndicator.querySelector('.status-text').textContent = 'Serviço Online';
        } else {
            statusIndicator.className = 'status-indicator offline';
            statusIndicator.querySelector('.status-text').textContent = 'Serviço Offline';
        }
    } catch (error) {
        statusIndicator.className = 'status-indicator offline';
        statusIndicator.querySelector('.status-text').textContent = 'Serviço Offline';
    }
}

// Dashboard
function loadDashboard() {
    // Load from localStorage
    const history = JSON.parse(localStorage.getItem('cloneHistory') || '[]');
    cloneHistory = history;

    // Calculate stats
    const totalSites = history.length;
    const totalSize = history.reduce((sum, item) => sum + (item.size || 0), 0);
    const lastClone = history.length > 0 ? history[0].timestamp : null;
    const successCount = history.filter(item => item.success).length;
    const successRate = totalSites > 0 ? Math.round((successCount / totalSites) * 100) : 100;

    // Update stats
    document.getElementById('totalSites').textContent = totalSites;
    document.getElementById('totalSize').textContent = formatBytes(totalSize);
    document.getElementById('lastClone').textContent = lastClone ? formatRelativeTime(lastClone) : 'Nunca';
    document.getElementById('successRate').textContent = successRate + '%';

    // Update recent clones list
    const recentClonesList = document.getElementById('recentClonesList');

    if (history.length === 0) {
        recentClonesList.innerHTML = `
            <div class="empty-state">
                <i class="fas fa-inbox"></i>
                <h3>Nenhuma clonagem ainda</h3>
                <p>Comece clonando seu primeiro site!</p>
            </div>
        `;
        return;
    }

    const recentClones = history.slice(0, 5);
    recentClonesList.innerHTML = recentClones.map(clone => `
        <div class="clone-item">
            <div class="clone-info">
                <div class="clone-icon">
                    <i class="fas fa-${clone.success ? 'check' : 'times'}"></i>
                </div>
                <div class="clone-details">
                    <h4>${clone.url}</h4>
                    <p>${formatRelativeTime(clone.timestamp)} • ${formatBytes(clone.size || 0)} • ${clone.files || 0} arquivos</p>
                </div>
            </div>
            <div class="clone-actions">
                ${clone.success ? `
                    <button class="btn btn-secondary btn-sm" onclick="openClonedSite('${clone.directory}')">
                        <i class="fas fa-external-link-alt"></i>
                    </button>
                    <button class="btn btn-secondary btn-sm" onclick="openCloneFolder('${clone.directory}')">
                        <i class="fas fa-folder-open"></i>
                    </button>
                ` : ''}
            </div>
        </div>
    `).join('');
}

function refreshDashboard() {
    loadDashboard();
    showToast('Dashboard atualizado!', 'success');
}

// Clone Form
function setupForms() {
    // Clone form
    const cloneForm = document.getElementById('cloneForm');
    cloneForm.addEventListener('submit', handleCloneSubmit);

    // Depth slider
    const depthSlider = document.getElementById('depthLevel');
    const depthValue = document.getElementById('depthValue');

    depthSlider.addEventListener('input', () => {
        depthValue.textContent = depthSlider.value + ' níveis';
    });
}

async function handleCloneSubmit(e) {
    e.preventDefault();

    const cloneUrlEl = document.getElementById('cloneUrl');
    const depthLevelEl = document.getElementById('depthLevel');
    const includeImagesEl = document.getElementById('includeImages');
    const includeCSSEl = document.getElementById('includeCSS');
    const includeJSEl = document.getElementById('includeJS');
    const convertLinksEl = document.getElementById('convertLinks');

    if (!cloneUrlEl || !depthLevelEl || !includeImagesEl || !includeCSSEl || !includeJSEl || !convertLinksEl) {
        console.error('Form elements not found');
        showToast('Erro: Elementos do formulário não encontrados', 'error');
        return;
    }

    const url = cloneUrlEl.value.trim();
    const depth = parseInt(depthLevelEl.value);
    const includeImages = includeImagesEl.checked;
    const includeCSS = includeCSSEl.checked;
    const includeJS = includeJSEl.checked;
    const convertLinks = convertLinksEl.checked;
    const cloneMethod = 'wget';

    if (!url) {
        showToast('Por favor, insira uma URL válida', 'error');
        return;
    }

    // Validate URL
    try {
        new URL(url);
    } catch {
        showToast('URL inválida. Use o formato: https://exemplo.com', 'error');
        return;
    }

    await startCloning(url, {
        depth,
        includeImages,
        includeCSS,
        includeJS,
        convertLinks,
        method: cloneMethod
    });
}

async function startCloning(url, options) {
    const progressCard = document.getElementById('progressCard');
    const progressBar = document.getElementById('progressBar');
    const progressMessage = document.getElementById('progressMessage');
    const filesDownloaded = document.getElementById('filesDownloaded');
    const sizeDownloaded = document.getElementById('sizeDownloaded');
    const timeElapsed = document.getElementById('timeElapsed');

    // Show progress card
    progressCard.style.display = 'block';
    progressBar.style.width = '0%';

    const startTime = Date.now();
    let progress = 0;

    // Simulate progress
    const progressInterval = setInterval(() => {
        progress = Math.min(progress + Math.random() * 10, 90);
        progressBar.style.width = progress + '%';

        const elapsed = Math.floor((Date.now() - startTime) / 1000);
        timeElapsed.textContent = elapsed + 's';
    }, 1000);

    const messages = options.method === 'smart' ? [
        '🚀 Iniciando Smart Clone (Puppeteer)...',
        '⏳ Renderizando página completa...',
        '🖱️ Simulando interação do usuário...',
        '📜 Carregando conteúdo sob demanda...',
        '📦 Capturando recursos da rede...',
        '🔄 Reescrevendo links dinâmicos...',
        '✨ Otimizando clone final...'
    ] : [
        '🚀 Iniciando clonagem com WGET...',
        '⏳ Sem limite de tempo - pode demorar vários minutos...',
        '🔍 Analisando estrutura do site...',
        '📄 Baixando páginas HTML...',
        '🎨 Baixando CSS e estilos...',
        '⚡ Baixando JavaScript...',
        '📦 Baixando imagens e assets...',
        '🔗 Convertendo links para locais...',
        '💪 Clonagem profissional em andamento...',
        '✨ Finalizando clonagem...'
    ];

    let messageIndex = 0;
    progressMessage.textContent = messages[0];

    const messageInterval = setInterval(() => {
        messageIndex = (messageIndex + 1) % messages.length;
        progressMessage.textContent = messages[messageIndex];
    }, 4000);

    try {
        let response;

        if (options.method === 'smart') {
            response = await fetch('/api/smart-clone', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ url })
            });
        } else {
            // WGET logic
            response = await fetch('/api/wget-clone', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    url,
                    depth: options.depth
                })
            });
        }

        clearInterval(progressInterval);
        clearInterval(messageInterval);

        const data = await response.json();

        if (data.success) {
            // Complete progress
            progressBar.style.width = '100%';
            progressMessage.textContent = '✅ Clonagem concluída com sucesso!';

            // Update stats
            const files = data.data?.files || data.data?.cloneInfo?.fileCount || data.data?.resources || data.files || 0;
            const size = data.data?.size || data.data?.cloneInfo?.totalSize || data.size || 0;

            filesDownloaded.textContent = files;
            sizeDownloaded.textContent = formatBytes(size);

            // Save to history
            const cloneRecord = {
                url,
                timestamp: new Date().toISOString(),
                success: true,
                files: files,
                size: size,
                directory: data.data.path || data.data.directory,
                depth: options.depth,
                method: options.method
            };

            saveToHistory(cloneRecord);

            // Show success message
            setTimeout(() => {
                showToast('Site clonado com sucesso!', 'success');
                progressCard.style.display = 'none';

                // Show success dialog
                showSuccessDialog(cloneRecord);
            }, 2000);

        } else {
            throw new Error(data.error || 'Erro desconhecido');
        }

    } catch (error) {
        clearInterval(progressInterval);
        clearInterval(messageInterval);

        console.error('Clone error:', error);
        progressCard.style.display = 'none';

        // Save failed attempt to history
        saveToHistory({
            url,
            timestamp: new Date().toISOString(),
            success: false,
            error: error.message
        });

        showToast('Erro ao clonar site: ' + error.message, 'error');
    }
}

function showSuccessDialog(cloneRecord) {
    const dialog = document.createElement('div');
    dialog.className = 'success-dialog';
    dialog.innerHTML = `
        <div class="success-dialog-content">
            <div class="success-icon">
                <i class="fas fa-check-circle"></i>
            </div>
            <h3>Site Clonado com Sucesso!</h3>
            <p>${cloneRecord.url}</p>
            <div class="success-stats">
                <span><i class="fas fa-file"></i> ${cloneRecord.files} arquivos</span>
                <span><i class="fas fa-hdd"></i> ${formatBytes(cloneRecord.size)}</span>
            </div>
            <div class="success-actions">
                <button class="btn btn-primary" onclick="openClonedSite('${cloneRecord.directory}'); closeSuccessDialog()">
                    <i class="fas fa-external-link-alt"></i> Abrir Site
                </button>
                <button class="btn btn-secondary" onclick="openCloneFolder('${cloneRecord.directory}'); closeSuccessDialog()">
                    <i class="fas fa-folder-open"></i> Abrir Pasta
                </button>
                <button class="btn btn-secondary" onclick="closeSuccessDialog()">
                    Fechar
                </button>
            </div>
        </div>
    `;

    document.body.appendChild(dialog);

    // Add styles
    const style = document.createElement('style');
    style.textContent = `
        .success-dialog {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 10000;
            animation: fadeIn 0.3s;
        }
        .success-dialog-content {
            background: white;
            border-radius: 16px;
            padding: 2rem;
            max-width: 500px;
            text-align: center;
            animation: slideUp 0.3s;
        }
        .success-icon {
            font-size: 4rem;
            color: var(--success-color);
            margin-bottom: 1rem;
        }
        .success-dialog-content h3 {
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
        }
        .success-dialog-content p {
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
        }
        .success-stats {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-bottom: 2rem;
            padding: 1rem;
            background: var(--bg-primary);
            border-radius: 8px;
        }
        .success-stats span {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .success-actions {
            display: flex;
            gap: 0.5rem;
            justify-content: center;
            flex-wrap: wrap;
        }
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        @keyframes slideUp {
            from { transform: translateY(20px); opacity: 0; }
            to { transform: translateY(0); opacity: 1; }
        }
    `;
    document.head.appendChild(style);
}

function closeSuccessDialog() {
    const dialog = document.querySelector('.success-dialog');
    if (dialog) {
        dialog.remove();
    }
}

// History
function loadHistory() {
    const history = JSON.parse(localStorage.getItem('cloneHistory') || '[]');
    cloneHistory = history;

    const historyList = document.getElementById('historyList');

    if (history.length === 0) {
        historyList.innerHTML = `
            <div class="empty-state">
                <i class="fas fa-history"></i>
                <h3>Nenhum histórico</h3>
                <p>Seus sites clonados aparecerão aqui</p>
            </div>
        `;
        return;
    }

    historyList.innerHTML = history.map((item, index) => `
        <div class="history-item">
            <div class="history-info">
                <h4>${item.url}</h4>
                <div class="history-meta">
                    <span><i class="fas fa-calendar"></i> ${formatDate(item.timestamp)}</span>
                    <span><i class="fas fa-${item.success ? 'check-circle' : 'times-circle'}"></i> ${item.success ? 'Sucesso' : 'Falhou'}</span>
                    ${item.files ? `<span><i class="fas fa-file"></i> ${item.files} arquivos</span>` : ''}
                    ${item.size ? `<span><i class="fas fa-hdd"></i> ${formatBytes(item.size)}</span>` : ''}
                </div>
            </div>
            <div class="clone-actions">
                ${item.success ? `
                    <button class="btn btn-secondary btn-sm" onclick="openClonedSite('${item.directory}')" title="Abrir Site">
                        <i class="fas fa-external-link-alt"></i>
                    </button>
                    <button class="btn btn-secondary btn-sm" onclick="openCloneFolder('${item.directory}')" title="Abrir Pasta">
                        <i class="fas fa-folder-open"></i>
                    </button>
                    <button class="btn btn-primary btn-sm" onclick="recloneSite('${item.url}')" title="Clonar Novamente">
                        <i class="fas fa-redo"></i>
                    </button>
                ` : ''}
                <button class="btn btn-danger btn-sm" onclick="deleteHistoryItem(${index})" title="Remover">
                    <i class="fas fa-trash"></i>
                </button>
            </div>
        </div>
    `).join('');
}

function refreshHistory() {
    loadHistory();
    showToast('Histórico atualizado!', 'success');
}

function clearHistory() {
    if (confirm('Tem certeza que deseja limpar todo o histórico? Esta ação não pode ser desfeita.')) {
        localStorage.removeItem('cloneHistory');
        cloneHistory = [];
        loadHistory();
        loadDashboard();
        showToast('Histórico limpo com sucesso!', 'success');
    }
}

function deleteHistoryItem(index) {
    if (confirm('Remover este item do histórico?')) {
        cloneHistory.splice(index, 1);
        localStorage.setItem('cloneHistory', JSON.stringify(cloneHistory));
        loadHistory();
        loadDashboard();
        showToast('Item removido!', 'success');
    }
}

function recloneSite(url) {
    document.getElementById('cloneUrl').value = url;
    navigateToPage('new-clone');
    showToast('URL carregada! Configure as opções e clique em "Iniciar Clonagem"', 'info');
}

function saveToHistory(record) {
    cloneHistory.unshift(record);
    // Keep only last 100 records
    if (cloneHistory.length > 100) {
        cloneHistory = cloneHistory.slice(0, 100);
    }
    localStorage.setItem('cloneHistory', JSON.stringify(cloneHistory));
}

// Settings
function loadSettings() {
    const savedSettings = localStorage.getItem('cloneSettings');
    if (savedSettings) {
        settings = JSON.parse(savedSettings);
    }

    // Populate settings form (if needed)
}

function saveSettings() {
    localStorage.setItem('cloneSettings', JSON.stringify(settings));
    showToast('Configurações salvas!', 'success');
}

// Utility Functions
function openClonedSite(directory) {
    // Try to open via server endpoint
    fetch('/api/health', {
        method: 'GET'
    }).then(response => {
        if (response.ok) {
            // Server is running, open the site via same origin
            const siteName = directory.replace(/\\/g, '/').split('/').pop();
            window.open(`/${siteName}/index.html`, '_blank');
        } else {
            showToast('Servidor não está respondendo.', 'error');
        }
    }).catch(error => {
        showToast('Servidor não está respondendo.', 'error');
    });
}

function openCloneFolder(directory) {
    showToast('Abrindo pasta no sistema da VPS: ' + directory, 'info');
    fetch('/api/open-folder', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ path: directory })
    }).then(res => res.json())
      .then(data => {
          if (!data.success) showToast('Erro ao abrir pasta: ' + (data.error || ''), 'error');
      })
      .catch(err => console.error('Erro ao chamar open-folder:', err));
}

function showToast(message, type = 'info') {
    const toast = document.createElement('div');
    toast.className = `toast toast-${type}`;
    toast.innerHTML = `
        <i class="fas fa-${type === 'success' ? 'check-circle' : type === 'error' ? 'exclamation-circle' : 'info-circle'}"></i>
        <span>${message}</span>
    `;

    document.body.appendChild(toast);

    // Add styles if not already added
    if (!document.getElementById('toast-styles')) {
        const style = document.createElement('style');
        style.id = 'toast-styles';
        style.textContent = `
            .toast {
                position: fixed;
                bottom: 2rem;
                right: 2rem;
                background: white;
                padding: 1rem 1.5rem;
                border-radius: 8px;
                box-shadow: 0 4px 12px rgba(0,0,0,0.15);
                display: flex;
                align-items: center;
                gap: 0.75rem;
                z-index: 10000;
                animation: slideInRight 0.3s, slideOutRight 0.3s 2.7s;
            }
            .toast-success { border-left: 4px solid var(--success-color); }
            .toast-error { border-left: 4px solid var(--danger-color); }
            .toast-info { border-left: 4px solid var(--info-color); }
            .toast i { font-size: 1.2rem; }
            .toast-success i { color: var(--success-color); }
            .toast-error i { color: var(--danger-color); }
            .toast-info i { color: var(--info-color); }
            @keyframes slideInRight {
                from { transform: translateX(400px); opacity: 0; }
                to { transform: translateX(0); opacity: 1; }
            }
            @keyframes slideOutRight {
                from { transform: translateX(0); opacity: 1; }
                to { transform: translateX(400px); opacity: 0; }
            }
        `;
        document.head.appendChild(style);
    }

    setTimeout(() => {
        toast.remove();
    }, 3000);
}

function formatBytes(bytes) {
    if (bytes === 0) return '0 B';
    const k = 1024;
    const sizes = ['B', 'KB', 'MB', 'GB'];
    const i = Math.floor(Math.log(bytes) / Math.log(k));
    return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
}

function formatDate(dateString) {
    const date = new Date(dateString);
    return date.toLocaleString('pt-BR', {
        day: '2-digit',
        month: '2-digit',
        year: 'numeric',
        hour: '2-digit',
        minute: '2-digit'
    });
}

function formatRelativeTime(dateString) {
    const date = new Date(dateString);
    const now = new Date();
    const diff = now - date;

    const seconds = Math.floor(diff / 1000);
    const minutes = Math.floor(seconds / 60);
    const hours = Math.floor(minutes / 60);
    const days = Math.floor(hours / 24);

    if (days > 0) return days === 1 ? 'Há 1 dia' : `Há ${days} dias`;
    if (hours > 0) return hours === 1 ? 'Há 1 hora' : `Há ${hours} horas`;
    if (minutes > 0) return minutes === 1 ? 'Há 1 minuto' : `Há ${minutes} minutos`;
    return 'Agora mesmo';
}