/**
 * WhatsApp Bot Manager - JavaScript
 * Fecha: 13 de noviembre de 2025
 */

class WhatsAppBotManager {
    constructor() {
        this.apiBaseUrl = './api/';
        this.currentTab = 'dashboard';
        this.currentMenuId = null;
        this.charts = {};
        
        this.init();
    }

    init() {
        this.setupEventListeners();
        this.loadDashboard();
        this.setupCharts();
        
        // Auto-refresh cada 30 segundos
        setInterval(() => {
            if (this.currentTab === 'dashboard') {
                this.refreshStats();
            }
        }, 30000);
    }

    setupEventListeners() {
        // Navegación de tabs
        document.querySelectorAll('.nav-link').forEach(link => {
            link.addEventListener('click', (e) => {
                e.preventDefault();
                const tabName = link.getAttribute('data-tab');
                this.showTab(tabName);
            });
        });

        // Formularios
        this.setupFormListeners();
        
        // Búsquedas
        this.setupSearchListeners();
    }

    setupFormListeners() {
        // Formulario de configuración
        const settingsForm = document.getElementById('settings-form');
        if (settingsForm) {
            settingsForm.addEventListener('submit', (e) => {
                e.preventDefault();
                this.saveSettings();
            });
        }

        // Formulario de menú
        const menuForm = document.getElementById('menu-form');
        if (menuForm) {
            menuForm.addEventListener('submit', (e) => {
                e.preventDefault();
                this.saveMenu();
            });
        }

        // Formulario de envío de mensaje
        const sendMessageForm = document.getElementById('send-message-form');
        if (sendMessageForm) {
            sendMessageForm.addEventListener('submit', (e) => {
                e.preventDefault();
                this.sendMessage();
            });
        }

        // Formulario de mensaje masivo
        const broadcastForm = document.getElementById('broadcast-form');
        if (broadcastForm) {
            broadcastForm.addEventListener('submit', (e) => {
                e.preventDefault();
                this.sendBroadcast();
            });
        }

        // Cambio de tipo de mensaje
        const messageType = document.getElementById('message-type');
        if (messageType) {
            messageType.addEventListener('change', () => {
                this.toggleMessageFields();
            });
        }
    }

    setupSearchListeners() {
        // Búsqueda de conversaciones
        const searchConversations = document.getElementById('search-conversations');
        if (searchConversations) {
            searchConversations.addEventListener('input', (e) => {
                this.searchConversations(e.target.value);
            });
        }
    }

    showTab(tabName) {
        // Ocultar todas las pestañas
        document.querySelectorAll('.tab-content').forEach(tab => {
            tab.classList.remove('active');
        });

        // Remover clase active de navegación
        document.querySelectorAll('.nav-link').forEach(link => {
            link.classList.remove('active');
        });

        // Mostrar pestaña seleccionada
        const targetTab = document.getElementById(tabName);
        if (targetTab) {
            targetTab.classList.add('active');
        }

        // Activar enlace de navegación
        const activeLink = document.querySelector(`[data-tab="${tabName}"]`);
        if (activeLink) {
            activeLink.classList.add('active');
        }

        this.currentTab = tabName;

        // Cargar datos específicos del tab
        this.loadTabData(tabName);
    }

    loadTabData(tabName) {
        switch (tabName) {
            case 'dashboard':
                this.loadDashboard();
                break;
            case 'conversations':
                this.loadConversations();
                break;
            case 'users':
                this.loadUsers();
                break;
            case 'menus':
                this.loadMenus();
                break;
            case 'messages':
                this.loadMessageUsers();
                break;
            case 'templates':
                this.loadTemplates();
                break;
            case 'autoresponses':
                this.loadAutoResponses();
                break;
            case 'settings':
                this.loadSettings();
                break;
            case 'logs':
                this.loadLogs();
                break;
        }
    }

    async loadDashboard() {
        try {
            const stats = await this.apiCall('get_stats.php');
            this.updateStats(stats);
            
            const recentMessages = await this.apiCall('get_recent_messages.php');
            this.updateRecentMessages(recentMessages);

            this.updateChart();
        } catch (error) {
            this.showError('Error cargando dashboard: ' + error.message);
        }
    }

    updateStats(stats) {
        if (stats) {
            document.getElementById('total-users').textContent = stats.total_users || 0;
            document.getElementById('messages-today').textContent = stats.messages_today || 0;
            document.getElementById('active-users').textContent = stats.active_users || 0;
            document.getElementById('total-messages').textContent = stats.total_messages || 0;
        }
    }

    updateRecentMessages(messages) {
        const container = document.getElementById('recent-messages');
        if (!container) return;

        container.innerHTML = '';

        if (messages && messages.length > 0) {
            messages.forEach(message => {
                const messageElement = this.createRecentMessageElement(message);
                container.appendChild(messageElement);
            });
        } else {
            container.innerHTML = '<div class="text-center text-muted">No hay mensajes recientes</div>';
        }
    }

    createRecentMessageElement(message) {
        const div = document.createElement('div');
        div.className = 'recent-message';
        
        const direction = message.direction === 'incoming' ? '📥' : '📤';
        const time = new Date(message.created_at).toLocaleString();
        
        div.innerHTML = `
            <div class="d-flex justify-content-between">
                <span class="fw-bold">${direction} ${message.phone_number}</span>
                <span class="time">${time}</span>
            </div>
            <div class="content">${this.truncateText(message.content, 50)}</div>
        `;
        
        return div;
    }

    setupCharts() {
        const ctx = document.getElementById('messagesChart');
        if (ctx) {
            this.charts.messages = new Chart(ctx, {
                type: 'line',
                data: {
                    labels: [],
                    datasets: [{
                        label: 'Mensajes',
                        data: [],
                        borderColor: '#25d366',
                        backgroundColor: 'rgba(37, 211, 102, 0.1)',
                        borderWidth: 3,
                        fill: true,
                        tension: 0.4
                    }]
                },
                options: {
                    responsive: true,
                    maintainAspectRatio: false,
                    scales: {
                        y: {
                            beginAtZero: true,
                            grid: {
                                color: 'rgba(0,0,0,0.1)'
                            }
                        },
                        x: {
                            grid: {
                                color: 'rgba(0,0,0,0.1)'
                            }
                        }
                    },
                    plugins: {
                        legend: {
                            display: false
                        }
                    }
                }
            });
        }
    }

    async updateChart() {
        try {
            const chartData = await this.apiCall('get_chart_data.php');
            if (chartData && this.charts.messages) {
                this.charts.messages.data.labels = chartData.labels;
                this.charts.messages.data.datasets[0].data = chartData.data;
                this.charts.messages.update();
            }
        } catch (error) {
            console.error('Error updating chart:', error);
        }
    }

    async loadConversations() {
        try {
            const conversations = await this.apiCall('get_conversations.php');
            this.updateConversationsTable(conversations);
        } catch (error) {
            this.showError('Error cargando conversaciones: ' + error.message);
        }
    }

    updateConversationsTable(conversations) {
        const tbody = document.getElementById('conversations-table');
        if (!tbody) return;

        tbody.innerHTML = '';

        conversations.forEach(conv => {
            const row = this.createConversationRow(conv);
            tbody.appendChild(row);
        });
    }

    createConversationRow(conv) {
        const tr = document.createElement('tr');
        tr.innerHTML = `
            <td>
                <div class="fw-bold">${conv.phone_number}</div>
                <small class="text-muted">${conv.name || 'Sin nombre'}</small>
            </td>
            <td>${this.truncateText(conv.last_message, 50)}</td>
            <td>
                <span class="badge badge-${this.getMessageTypeColor(conv.message_type)}">
                    ${conv.message_type}
                </span>
            </td>
            <td>
                <span class="badge badge-${this.getStatusColor(conv.status)}">
                    ${conv.status}
                </span>
            </td>
            <td>${new Date(conv.last_activity).toLocaleString()}</td>
            <td>
                <button class="btn btn-sm btn-primary" onclick="app.viewConversation('${conv.user_id}')">
                    <i class="fas fa-eye"></i>
                </button>
                <button class="btn btn-sm btn-success" onclick="app.replyToUser('${conv.phone_number}')">
                    <i class="fas fa-reply"></i>
                </button>
            </td>
        `;
        return tr;
    }

    async loadUsers() {
        try {
            const users = await this.apiCall('get_users.php');
            this.updateUsersTable(users);
        } catch (error) {
            this.showError('Error cargando usuarios: ' + error.message);
        }
    }

    updateUsersTable(users) {
        const tbody = document.getElementById('users-table');
        if (!tbody) return;

        tbody.innerHTML = '';

        users.forEach(user => {
            const row = this.createUserRow(user);
            tbody.appendChild(row);
        });
    }

    createUserRow(user) {
        const tr = document.createElement('tr');
        tr.innerHTML = `
            <td>${user.id}</td>
            <td>${user.phone_number}</td>
            <td>${user.name || 'Sin nombre'}</td>
            <td>
                <span class="badge badge-${this.getStatusColor(user.status)}">
                    ${user.status}
                </span>
            </td>
            <td>${user.current_menu || 'Ninguno'}</td>
            <td>${new Date(user.created_at).toLocaleString()}</td>
            <td>
                <button class="btn btn-sm btn-primary" onclick="app.editUser(${user.id})">
                    <i class="fas fa-edit"></i>
                </button>
                <button class="btn btn-sm btn-warning" onclick="app.blockUser(${user.id})">
                    <i class="fas fa-ban"></i>
                </button>
            </td>
        `;
        return tr;
    }

    async loadMenus() {
        try {
            const menus = await this.apiCall('get_menus.php');
            this.updateMenusTree(menus);
            this.loadMenuParents(menus);
        } catch (error) {
            this.showError('Error cargando menús: ' + error.message);
        }
    }

    updateMenusTree(menus) {
        const container = document.getElementById('menus-tree');
        if (!container) return;

        container.innerHTML = '';

        // Organizar menús por jerarquía
        const rootMenus = menus.filter(menu => menu.is_root);
        
        rootMenus.forEach(menu => {
            const menuElement = this.createMenuElement(menu, menus);
            container.appendChild(menuElement);
        });
    }

    createMenuElement(menu, allMenus) {
        const div = document.createElement('div');
        div.className = 'menu-item ' + (menu.is_root ? 'root' : 'child');
        
        div.innerHTML = `
            <div>
                <h6 class="mb-1">${menu.title}</h6>
                <small class="text-muted">${menu.description || 'Sin descripción'}</small>
                <div class="mt-2">
                    <span class="badge badge-${menu.is_active ? 'success' : 'secondary'}">
                        ${menu.is_active ? 'Activo' : 'Inactivo'}
                    </span>
                </div>
            </div>
            <div>
                <button class="btn btn-sm btn-primary me-2" onclick="app.editMenu(${menu.id})">
                    <i class="fas fa-edit"></i>
                </button>
                <button class="btn btn-sm btn-info me-2" onclick="app.manageMenuOptions(${menu.id})">
                    <i class="fas fa-list"></i>
                </button>
                <button class="btn btn-sm btn-danger" onclick="app.deleteMenu(${menu.id})">
                    <i class="fas fa-trash"></i>
                </button>
            </div>
        `;

        // Agregar submenús
        const childMenus = allMenus.filter(child => child.parent_id === menu.id);
        if (childMenus.length > 0) {
            const childContainer = document.createElement('div');
            childContainer.style.marginLeft = '20px';
            childContainer.style.marginTop = '10px';
            
            childMenus.forEach(child => {
                const childElement = this.createMenuElement(child, allMenus);
                childContainer.appendChild(childElement);
            });
            
            div.appendChild(childContainer);
        }

        return div;
    }

    loadMenuParents(menus) {
        const select = document.getElementById('menu-parent');
        if (!select) return;

        select.innerHTML = '<option value="">Sin padre (Menú raíz)</option>';
        
        menus.forEach(menu => {
            const option = document.createElement('option');
            option.value = menu.id;
            option.textContent = menu.title;
            select.appendChild(option);
        });
    }

    async loadMessageUsers() {
        try {
            const users = await this.apiCall('get_users.php');
            const templates = await this.apiCall('get_templates.php');
            
            this.updateMessageUserSelect(users);
            this.updateTemplateSelect(templates);
        } catch (error) {
            this.showError('Error cargando datos de mensaje: ' + error.message);
        }
    }

    updateMessageUserSelect(users) {
        const select = document.getElementById('message-recipient');
        if (!select) return;

        select.innerHTML = '<option value="">Seleccionar usuario...</option>';
        
        users.forEach(user => {
            const option = document.createElement('option');
            option.value = user.phone_number;
            option.textContent = `${user.phone_number} ${user.name ? '(' + user.name + ')' : ''}`;
            select.appendChild(option);
        });
    }

    updateTemplateSelect(templates) {
        const select = document.getElementById('message-template');
        if (!select) return;

        select.innerHTML = '<option value="">Seleccionar plantilla...</option>';
        
        templates.forEach(template => {
            if (template.status === 'approved') {
                const option = document.createElement('option');
                option.value = template.template_name;
                option.textContent = template.name;
                select.appendChild(option);
            }
        });
    }

    toggleMessageFields() {
        const messageType = document.getElementById('message-type').value;
        const textGroup = document.getElementById('message-text-group');
        const templateGroup = document.getElementById('template-group');

        if (messageType === 'template') {
            textGroup.style.display = 'none';
            templateGroup.style.display = 'block';
        } else {
            textGroup.style.display = 'block';
            templateGroup.style.display = 'none';
        }
    }

    async sendMessage() {
        const recipient = document.getElementById('message-recipient').value;
        const messageType = document.getElementById('message-type').value;
        const messageText = document.getElementById('message-text').value;
        const template = document.getElementById('message-template').value;

        if (!recipient) {
            this.showError('Por favor selecciona un destinatario');
            return;
        }

        const data = {
            recipient: recipient,
            type: messageType
        };

        if (messageType === 'text') {
            if (!messageText) {
                this.showError('Por favor escribe un mensaje');
                return;
            }
            data.message = messageText;
        } else if (messageType === 'template') {
            if (!template) {
                this.showError('Por favor selecciona una plantilla');
                return;
            }
            data.template = template;
        }

        try {
            this.showLoading('Enviando mensaje...');
            const result = await this.apiCall('send_message.php', 'POST', data);
            
            if (result.success) {
                this.showSuccess('Mensaje enviado correctamente');
                document.getElementById('send-message-form').reset();
            } else {
                this.showError(result.error || 'Error enviando mensaje');
            }
        } catch (error) {
            this.showError('Error enviando mensaje: ' + error.message);
        } finally {
            this.hideLoading();
        }
    }

    async sendBroadcast() {
        const filter = document.getElementById('broadcast-filter').value;
        const message = document.getElementById('broadcast-message').value;

        if (!message) {
            this.showError('Por favor escribe un mensaje');
            return;
        }

        if (!confirm('¿Estás seguro de enviar este mensaje a múltiples usuarios?')) {
            return;
        }

        try {
            this.showLoading('Enviando mensajes...');
            const result = await this.apiCall('send_broadcast.php', 'POST', {
                filter: filter,
                message: message
            });

            if (result.success) {
                this.showSuccess(`Mensajes enviados a ${result.sent_count} usuarios`);
                document.getElementById('broadcast-form').reset();
            } else {
                this.showError(result.error || 'Error en envío masivo');
            }
        } catch (error) {
            this.showError('Error en envío masivo: ' + error.message);
        } finally {
            this.hideLoading();
        }
    }

    async saveMenu() {
        const formData = {
            name: document.getElementById('menu-name').value,
            title: document.getElementById('menu-title').value,
            description: document.getElementById('menu-description').value,
            parent_id: document.getElementById('menu-parent').value || null,
            is_active: document.getElementById('menu-active').checked ? 1 : 0
        };

        try {
            this.showLoading('Guardando menú...');
            const result = await this.apiCall('save_menu.php', 'POST', formData);

            if (result.success) {
                this.showSuccess('Menú guardado correctamente');
                document.getElementById('menu-form').reset();
                this.loadMenus();
            } else {
                this.showError(result.error || 'Error guardando menú');
            }
        } catch (error) {
            this.showError('Error guardando menú: ' + error.message);
        } finally {
            this.hideLoading();
        }
    }

    async saveSettings() {
        const formData = {
            whatsapp_token: document.getElementById('whatsapp-token').value,
            phone_number_id: document.getElementById('phone-number-id').value,
            webhook_token: document.getElementById('webhook-token').value,
            business_name: document.getElementById('business-name').value,
            welcome_message: document.getElementById('welcome-message').value
        };

        try {
            this.showLoading('Guardando configuración...');
            const result = await this.apiCall('save_settings.php', 'POST', formData);

            if (result.success) {
                this.showSuccess('Configuración guardada correctamente');
            } else {
                this.showError(result.error || 'Error guardando configuración');
            }
        } catch (error) {
            this.showError('Error guardando configuración: ' + error.message);
        } finally {
            this.hideLoading();
        }
    }

    async loadSettings() {
        try {
            const settings = await this.apiCall('get_settings.php');
            
            if (settings) {
                document.getElementById('whatsapp-token').value = settings.whatsapp_token || '';
                document.getElementById('phone-number-id').value = settings.phone_number_id || '';
                document.getElementById('webhook-token').value = settings.webhook_token || '';
                document.getElementById('business-name').value = settings.business_name || '';
                document.getElementById('welcome-message').value = settings.welcome_message || '';
            }
        } catch (error) {
            this.showError('Error cargando configuración: ' + error.message);
        }
    }

    async loadLogs() {
        try {
            const logs = await this.apiCall('get_logs.php');
            this.updateLogsTable(logs);
        } catch (error) {
            this.showError('Error cargando logs: ' + error.message);
        }
    }

    updateLogsTable(logs) {
        const tbody = document.getElementById('logs-table');
        if (!tbody) return;

        tbody.innerHTML = '';

        logs.forEach(log => {
            const row = this.createLogRow(log);
            tbody.appendChild(row);
        });
    }

    createLogRow(log) {
        const tr = document.createElement('tr');
        tr.innerHTML = `
            <td>${new Date(log.created_at).toLocaleString()}</td>
            <td>${log.ip_address}</td>
            <td>
                <span class="badge badge-${log.status_code === 200 ? 'success' : 'danger'}">
                    ${log.status_code}
                </span>
            </td>
            <td>
                <button class="btn btn-sm btn-outline-primary" onclick="app.viewLogDetails('${log.id}', 'request')">
                    Ver Request
                </button>
            </td>
            <td>
                <button class="btn btn-sm btn-outline-primary" onclick="app.viewLogDetails('${log.id}', 'response')">
                    Ver Response
                </button>
            </td>
        `;
        return tr;
    }

    // Utility methods
    async apiCall(endpoint, method = 'GET', data = null) {
        const options = {
            method: method,
            headers: {
                'Content-Type': 'application/json',
            }
        };

        if (data && method !== 'GET') {
            options.body = JSON.stringify(data);
        }

        const response = await fetch(this.apiBaseUrl + endpoint, options);
        
        if (!response.ok) {
            throw new Error(`HTTP error! status: ${response.status}`);
        }

        return await response.json();
    }

    showError(message) {
        this.showNotification(message, 'error');
    }

    showSuccess(message) {
        this.showNotification(message, 'success');
    }

    showWarning(message) {
        this.showNotification(message, 'warning');
    }

    showInfo(message) {
        this.showNotification(message, 'info');
    }

    showNotification(message, type = 'info') {
        // Crear notificación toast
        const toast = document.createElement('div');
        toast.className = `alert alert-${type} position-fixed`;
        toast.style.top = '20px';
        toast.style.right = '20px';
        toast.style.zIndex = '9999';
        toast.style.minWidth = '300px';
        toast.innerHTML = `
            <i class="fas fa-${this.getNotificationIcon(type)}"></i>
            ${message}
            <button type="button" class="btn-close" onclick="this.parentElement.remove()"></button>
        `;

        document.body.appendChild(toast);

        // Auto-remove después de 5 segundos
        setTimeout(() => {
            if (toast.parentElement) {
                toast.remove();
            }
        }, 5000);
    }

    getNotificationIcon(type) {
        const icons = {
            success: 'check-circle',
            error: 'exclamation-circle',
            warning: 'exclamation-triangle',
            info: 'info-circle'
        };
        return icons[type] || 'info-circle';
    }

    showLoading(message = 'Cargando...') {
        const loading = document.createElement('div');
        loading.id = 'loading-overlay';
        loading.className = 'position-fixed w-100 h-100 d-flex align-items-center justify-content-center';
        loading.style.top = '0';
        loading.style.left = '0';
        loading.style.backgroundColor = 'rgba(0,0,0,0.5)';
        loading.style.zIndex = '9999';
        loading.innerHTML = `
            <div class="bg-white p-4 rounded text-center">
                <div class="spinner mb-3"></div>
                <div>${message}</div>
            </div>
        `;

        document.body.appendChild(loading);
    }

    hideLoading() {
        const loading = document.getElementById('loading-overlay');
        if (loading) {
            loading.remove();
        }
    }

    truncateText(text, length) {
        if (!text) return '';
        return text.length > length ? text.substring(0, length) + '...' : text;
    }

    getStatusColor(status) {
        const colors = {
            'active': 'success',
            'inactive': 'secondary',
            'blocked': 'danger',
            'sent': 'info',
            'delivered': 'success',
            'read': 'success',
            'failed': 'danger'
        };
        return colors[status] || 'secondary';
    }

    getMessageTypeColor(type) {
        const colors = {
            'text': 'primary',
            'image': 'info',
            'audio': 'warning',
            'video': 'danger',
            'document': 'secondary',
            'template': 'success'
        };
        return colors[type] || 'primary';
    }

    // Funciones específicas
    refreshData() {
        this.loadTabData(this.currentTab);
        this.showSuccess('Datos actualizados');
    }

    refreshStats() {
        this.loadDashboard();
    }

    exportUsers() {
        window.open(this.apiBaseUrl + 'export_users.php', '_blank');
    }

    viewConversation(userId) {
        // Implementar modal o página de conversación
        console.log('Ver conversación del usuario:', userId);
    }

    replyToUser(phoneNumber) {
        document.getElementById('message-recipient').value = phoneNumber;
        this.showTab('messages');
    }

    editUser(userId) {
        // Implementar modal de edición de usuario
        console.log('Editar usuario:', userId);
    }

    blockUser(userId) {
        if (confirm('¿Estás seguro de bloquear este usuario?')) {
            // Implementar bloqueo de usuario
            console.log('Bloquear usuario:', userId);
        }
    }

    editMenu(menuId) {
        this.currentMenuId = menuId;
        // Cargar datos del menú en el formulario
        console.log('Editar menú:', menuId);
    }

    deleteMenu(menuId) {
        if (confirm('¿Estás seguro de eliminar este menú?')) {
            // Implementar eliminación
            console.log('Eliminar menú:', menuId);
        }
    }

    manageMenuOptions(menuId) {
        // Mostrar modal de opciones de menú
        console.log('Gestionar opciones del menú:', menuId);
    }

    viewLogDetails(logId, type) {
        // Mostrar detalles del log en modal
        console.log('Ver detalles del log:', logId, type);
    }

    clearLogs() {
        if (confirm('¿Estás seguro de eliminar todos los logs?')) {
            // Implementar limpieza de logs
            console.log('Limpiar logs');
        }
    }

    refreshLogs() {
        this.loadLogs();
    }
}

// Inicializar la aplicación
const app = new WhatsAppBotManager();

// Funciones globales
window.refreshData = () => app.refreshData();
window.exportUsers = () => app.exportUsers();
window.refreshLogs = () => app.refreshLogs();
window.clearLogs = () => app.clearLogs();