/**
 * Sales Bot - Main Application JavaScript
 */

// Utility functions
const Utils = {
    formatMoney(amount) {
        return new Intl.NumberFormat('es-MX', { style: 'currency', currency: 'MXN' }).format(amount || 0);
    },

    formatDate(dateStr) {
        if (!dateStr) return '';
        const date = new Date(dateStr);
        return date.toLocaleDateString('es-MX', {
            year: 'numeric',
            month: 'short',
            day: 'numeric'
        });
    },

    formatTime(dateStr) {
        if (!dateStr) return '';
        const date = new Date(dateStr);
        return date.toLocaleTimeString('es-MX', { hour: '2-digit', minute: '2-digit' });
    },

    formatDateTime(dateStr) {
        if (!dateStr) return '';
        return `${this.formatDate(dateStr)} ${this.formatTime(dateStr)}`;
    },

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

    showNotification(message, type = 'info') {
        // Create notification element
        const notification = document.createElement('div');
        notification.className = `notification notification-${type}`;
        notification.textContent = message;
        notification.style.cssText = `
            position: fixed;
            top: 20px;
            right: 20px;
            padding: 15px 25px;
            border-radius: 8px;
            color: white;
            font-weight: 500;
            z-index: 9999;
            animation: slideIn 0.3s ease;
            background: ${type === 'success' ? '#00ff88' : type === 'error' ? '#ff4444' : '#00d4ff'};
            color: ${type === 'success' || type === 'info' ? '#000' : '#fff'};
        `;

        document.body.appendChild(notification);

        setTimeout(() => {
            notification.style.animation = 'slideOut 0.3s ease';
            setTimeout(() => notification.remove(), 300);
        }, 3000);
    }
};

// API Client
const API = {
    async get(endpoint) {
        try {
            const response = await fetch(endpoint);
            if (!response.ok) throw new Error(`HTTP ${response.status}`);
            return await response.json();
        } catch (error) {
            console.error(`API GET ${endpoint}:`, error);
            throw error;
        }
    },

    async post(endpoint, data) {
        try {
            const response = await fetch(endpoint, {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify(data)
            });
            if (!response.ok) throw new Error(`HTTP ${response.status}`);
            return await response.json();
        } catch (error) {
            console.error(`API POST ${endpoint}:`, error);
            throw error;
        }
    }
};

// Dashboard module
const Dashboard = {
    async loadSummary() {
        try {
            const data = await API.get('/api/dashboard/resumen');
            return data;
        } catch (error) {
            console.error('Error loading summary:', error);
            return null;
        }
    },

    async loadRanking() {
        try {
            const data = await API.get('/api/dashboard/ranking');
            return data;
        } catch (error) {
            console.error('Error loading ranking:', error);
            return [];
        }
    },

    async loadRecentSales() {
        try {
            const data = await API.get('/api/dashboard/ventas-recientes');
            return data;
        } catch (error) {
            console.error('Error loading recent sales:', error);
            return [];
        }
    }
};

// Analytics module
const Analytics = {
    async loadTrends(days = 30) {
        try {
            const data = await API.get(`/api/analytics/trends?days=${days}`);
            return data;
        } catch (error) {
            console.error('Error loading trends:', error);
            return null;
        }
    },

    async loadPredictions(period = 30) {
        try {
            const data = await API.get(`/api/analytics/predictions?period=${period}`);
            return data;
        } catch (error) {
            console.error('Error loading predictions:', error);
            return null;
        }
    },

    async loadComparisons(type = 'monthly') {
        try {
            const data = await API.get(`/api/analytics/comparisons?type=${type}`);
            return data;
        } catch (error) {
            console.error('Error loading comparisons:', error);
            return null;
        }
    }
};

// Offline support
const OfflineManager = {
    isOnline: navigator.onLine,

    init() {
        window.addEventListener('online', () => {
            this.isOnline = true;
            Utils.showNotification('Conexion restaurada', 'success');
            this.syncData();
        });

        window.addEventListener('offline', () => {
            this.isOnline = false;
            Utils.showNotification('Sin conexion - Modo offline', 'error');
        });
    },

    async cacheData(key, data) {
        try {
            localStorage.setItem(`salesbot_${key}`, JSON.stringify({
                data,
                timestamp: Date.now()
            }));
        } catch (e) {
            console.error('Error caching data:', e);
        }
    },

    getCachedData(key, maxAge = 300000) { // 5 minutes default
        try {
            const cached = localStorage.getItem(`salesbot_${key}`);
            if (!cached) return null;

            const { data, timestamp } = JSON.parse(cached);
            if (Date.now() - timestamp > maxAge) return null;

            return data;
        } catch (e) {
            return null;
        }
    },

    syncData() {
        // Sync any pending data when back online
        console.log('Syncing data...');
    }
};

// Initialize
document.addEventListener('DOMContentLoaded', () => {
    OfflineManager.init();
});

// Add CSS animations
const style = document.createElement('style');
style.textContent = `
    @keyframes slideIn {
        from { transform: translateX(100%); opacity: 0; }
        to { transform: translateX(0); opacity: 1; }
    }
    @keyframes slideOut {
        from { transform: translateX(0); opacity: 1; }
        to { transform: translateX(100%); opacity: 0; }
    }
`;
document.head.appendChild(style);

// Export for use in templates
window.Utils = Utils;
window.API = API;
window.Dashboard = Dashboard;
window.Analytics = Analytics;