/**
 * BI Agentes — CambioReal
 *
 * Uso:  node server.js
 * Abre: http://localhost:3080
 */
require('dotenv').config();

const express = require('express');
const session = require('express-session');
const path = require('path');
const { authenticate, requireAuth } = require('./src/auth');
const { fetchTransacoes, serialize } = require('./src/queries');
const { buildHTML } = require('./src/dashboard');

// Initialize SQLite (creates tables on first run)
require('./src/db-local');

const app = express();
const PORT = process.env.PORT || 3080;

// Middleware
app.use(express.urlencoded({ extended: false }));
app.use(express.json());
app.use(session({
  secret: process.env.SESSION_SECRET || 'bi-agentes-default-secret',
  resave: false,
  saveUninitialized: false,
  cookie: { maxAge: 8 * 60 * 60 * 1000 }, // 8 horas
}));

// Static files
app.use('/public', express.static(path.join(__dirname, 'public')));

// --- Routes ---

// Login page
app.get('/login', (req, res) => {
  if (req.session && req.session.agente) return res.redirect('/dashboard');
  res.sendFile(path.join(__dirname, 'public', 'login.html'));
});

// Login POST
app.post('/login', async (req, res) => {
  const { email, senha } = req.body;
  try {
    const agente = await authenticate(email, senha);
    if (!agente) return res.redirect('/login?error=1');
    req.session.agente = {
      id: agente.id,
      email: agente.email,
      agente_id: agente.agente_id,
      nome: agente.nome,
    };
    res.redirect('/dashboard');
  } catch (err) {
    console.error('Login error:', err);
    res.redirect('/login?error=1');
  }
});

// Logout
app.get('/logout', (req, res) => {
  req.session.destroy(() => res.redirect('/login'));
});

// Dashboard (protected)
app.get('/dashboard', requireAuth, async (req, res) => {
  try {
    const agente = req.session.agente;
    const { rowsBrlUsd, rowsUsdBrl } = await fetchTransacoes(agente.agente_id);
    const data = serialize(rowsBrlUsd, rowsUsdBrl);
    const html = buildHTML(data, agente);
    res.send(html);
  } catch (err) {
    console.error('Dashboard error:', err);
    res.status(500).send('Erro ao carregar dashboard: ' + err.message);
  }
});

// Root redirect
app.get('/', (req, res) => res.redirect('/dashboard'));

// Start
app.listen(PORT, () => {
  console.log(`BI Agentes rodando: http://localhost:${PORT}`);
});