const express = require('express');
const router = express.Router();
const { isAgent } = require('../middleware/auth');
const Ticket = require('../models/Ticket');
const Department = require('../models/Department');

router.get('/dashboard', isAgent, async (req, res) => {
    try {
        let tickets;
        if (['superadmin', 'admin'].includes(req.session.user.rol)) {
            tickets = await Ticket.findAll(req.session.user.company_id);
        } else {
            tickets = await Ticket.findByAgent(req.session.user.company_id, req.session.user.id);
        }
        const stats = await Ticket.countByStatus(req.session.user.company_id);
        const departments = await Department.findAll(req.session.user.company_id);
        res.render('agent/dashboard', { tickets, stats, departments });
    } catch (error) {
        console.error(error);
        req.flash('error_msg', 'Error al cargar dashboard');
        res.redirect('/');
    }
});

router.get('/ticket/:id', isAgent, async (req, res) => {
    try {
        const ticket = await Ticket.findById(req.params.id);
        if (!ticket) {
            req.flash('error_msg', 'Ticket no encontrado');
            return res.redirect('/agent/dashboard');
        }
        if (ticket.company_id !== req.session.user.company_id && req.session.user.rol !== 'superadmin') {
            req.flash('error_msg', 'Acceso denegado');
            return res.redirect('/agent/dashboard');
        }
        const respuestas = await Ticket.getResponses(req.params.id);
        let agents = [];
        if (['superadmin', 'admin'].includes(req.session.user.rol)) {
            const User = require('../models/User');
            const allUsers = await User.findAll(req.session.user.company_id);
            agents = allUsers.filter(u => u.rol === 'agent');
        }
        res.render('agent/view-ticket', { ticket, respuestas, agents });
    } catch (error) {
        console.error(error);
        req.flash('error_msg', 'Error al cargar ticket');
        res.redirect('/agent/dashboard');
    }
});

router.post('/ticket/:id/respond', isAgent, async (req, res) => {
    const { mensaje } = req.body;
    if (!mensaje) {
        req.flash('error_msg', 'El mensaje es obligatorio');
        return res.redirect(`/agent/ticket/${req.params.id}`);
    }
    try {
        await Ticket.addResponse(req.params.id, req.session.user.id, mensaje);
        req.flash('success_msg', 'Respuesta enviada');
        res.redirect(`/agent/ticket/${req.params.id}`);
    } catch (error) {
        console.error(error);
        req.flash('error_msg', 'Error al enviar respuesta');
        res.redirect(`/agent/ticket/${req.params.id}`);
    }
});

router.post('/ticket/:id/status', isAgent, async (req, res) => {
    const { status, assigned_to } = req.body;
    try {
        const data = {};
        if (status) data.status = status;
        if (assigned_to && ['superadmin', 'admin'].includes(req.session.user.rol)) {
            data.assigned_to = assigned_to;
        }
        await Ticket.update(req.params.id, data);
        req.flash('success_msg', 'Ticket actualizado');
        res.redirect(`/agent/ticket/${req.params.id}`);
    } catch (error) {
        console.error(error);
        req.flash('error_msg', 'Error al actualizar ticket');
        res.redirect(`/agent/ticket/${req.params.id}`);
    }
});

router.post('/ticket/:id/assign', isAgent, async (req, res) => {
    if (!['superadmin', 'admin'].includes(req.session.user.rol)) {
        req.flash('error_msg', 'Acceso denegado');
        return res.redirect('/agent/dashboard');
    }
    const { assigned_to } = req.body;
    try {
        await Ticket.update(req.params.id, { assigned_to: assigned_to || null });
        if (assigned_to) {
            await Ticket.update(req.params.id, { status: 'en_progreso' });
        }
        req.flash('success_msg', 'Ticket asignado');
        res.redirect(`/agent/ticket/${req.params.id}`);
    } catch (error) {
        console.error(error);
        req.flash('error_msg', 'Error al asignar ticket');
        res.redirect(`/agent/ticket/${req.params.id}`);
    }
});

module.exports = router;