const express = require('express');
const router = express.Router();
const { query } = require('../config/database');
const { authenticateToken } = require('../middleware/auth');

// GET /api/dashboard - Estatísticas do dashboard
router.get('/', authenticateToken, async (req, res) => {
    try {
        const company_id = req.user.company_id;
        console.log('GET /api/dashboard - Company ID:', company_id);

        // Estatísticas de dispositivos
        const devicesStats = await query(
            `SELECT 
                COUNT(*) as total,
                COUNT(*) FILTER (WHERE is_active = true) as active,
                COUNT(*) FILTER (WHERE is_active = false) as inactive,
                COUNT(*) FILTER (WHERE user_id IS NOT NULL) as assigned
             FROM devices 
             WHERE company_id = $1`,
            [company_id]
        );

        // Estatísticas de usuários
        const usersStats = await query(
            `SELECT 
                COUNT(*) as total,
                COUNT(*) FILTER (WHERE is_active = true) as active,
                COUNT(*) FILTER (WHERE is_active = false) as inactive
             FROM users 
             WHERE company_id = $1`,
            [company_id]
        );

        // Estatísticas de atividades (últimas 24 horas)
        const activitiesStats = await query(
            `SELECT 
                COUNT(*) as total_24h,
                COUNT(*) FILTER (WHERE activity_type = 'idle') as idle_count,
                COUNT(*) FILTER (WHERE activity_type = 'active') as active_count
             FROM activities 
             WHERE company_id = $1 
             AND created_at >= NOW() - INTERVAL '24 hours'`,
            [company_id]
        );

        // Estatísticas de chaves de ativação
        const keysStats = await query(
            `SELECT 
                COUNT(*) as total,
                COUNT(*) FILTER (WHERE is_used = true) as used,
                COUNT(*) FILTER (WHERE is_used = false) as available
             FROM activation_keys 
             WHERE company_id = $1`,
            [company_id]
        );

        // Dispositivos recentes (últimos 5)
        const recentDevices = await query(
            `SELECT d.*, u.name as user_name, u.email as user_email
             FROM devices d
             LEFT JOIN users u ON d.user_id = u.id
             WHERE d.company_id = $1
             ORDER BY d.created_at DESC
             LIMIT 5`,
            [company_id]
        );

        // Atividades recentes (últimas 10)
        const recentActivities = await query(
            `SELECT a.*, d.device_name, u.name as user_name
             FROM activities a
             LEFT JOIN devices d ON a.device_id = d.device_id
             LEFT JOIN users u ON d.user_id = u.id
             WHERE a.company_id = $1
             ORDER BY a.created_at DESC
             LIMIT 10`,
            [company_id]
        );

        // Converter valores string para números
        const devicesData = devicesStats.rows[0];
        const usersData = usersStats.rows[0];
        const activitiesData = activitiesStats.rows[0];
        const keysData = keysStats.rows[0];

        const response = {
            success: true,
            stats: {
                devices: {
                    total: parseInt(devicesData.total) || 0,
                    active: parseInt(devicesData.active) || 0,
                    inactive: parseInt(devicesData.inactive) || 0,
                    assigned: parseInt(devicesData.assigned) || 0
                },
                users: {
                    total: parseInt(usersData.total) || 0,
                    active: parseInt(usersData.active) || 0,
                    inactive: parseInt(usersData.inactive) || 0
                },
                activities: {
                    total_24h: parseInt(activitiesData.total_24h) || 0,
                    idle_count: parseInt(activitiesData.idle_count) || 0,
                    active_count: parseInt(activitiesData.active_count) || 0
                },
                keys: {
                    total: parseInt(keysData.total) || 0,
                    used: parseInt(keysData.used) || 0,
                    available: parseInt(keysData.available) || 0
                }
            },
            recent: {
                devices: recentDevices.rows,
                activities: recentActivities.rows
            }
        };

        console.log('GET /api/dashboard - Resposta:', JSON.stringify(response, null, 2));

        res.json(response);
    } catch (error) {
        console.error('Erro ao obter dados do dashboard:', error);
        console.error('Erro detalhado:', error.message);
        console.error('Stack:', error.stack);
        res.status(500).json({ error: 'Erro ao obter dados do dashboard', details: error.message });
    }
});

module.exports = router;