const express = require('express');
const bcrypt = require('bcryptjs');
const { audit, one } = require('../db');
const { publicUser, tokenFor } = require('../middleware/auth');
const { capabilitiesForRole } = require('../services/roles');
const { isLocked, registerFailure, registerSuccess, mustChangePassword } = require('../services/passwordPolicy');

const router = express.Router();

router.get('/public/bootstrap', (req, res) => {
  res.json({
    appName: 'DepreCore',
    setupComplete: Boolean(one('SELECT id FROM users LIMIT 1')),
    database: 'sqlite'
  });
});

router.post('/auth/login', (req, res) => {
  const { email, password } = req.body;
  const user = one('SELECT * FROM users WHERE lower(email) = lower(?) AND status = ?', [email || '', 'active']);
  if (!user) return res.status(401).json({ error: 'Invalid email or password' });

  // Locked accounts are refused before the password is even checked.
  if (isLocked(user)) {
    const minutes = Math.max(1, Math.ceil((new Date(user.locked_until).getTime() - Date.now()) / 60000));
    return res.status(423).json({ error: `Account locked. Try again in ${minutes} minute(s).`, lockedUntil: user.locked_until });
  }

  if (!bcrypt.compareSync(password || '', user.password_hash)) {
    const { locked, lockedUntil } = registerFailure(user);
    audit(user.id, 'login_failed', 'user', user.id, null, { email: user.email });
    if (locked) {
      const minutes = Math.max(1, Math.ceil((new Date(lockedUntil).getTime() - Date.now()) / 60000));
      return res.status(423).json({ error: `Too many failed attempts. Account locked for ${minutes} minute(s).`, lockedUntil });
    }
    return res.status(401).json({ error: 'Invalid email or password' });
  }

  registerSuccess(user);
  audit(user.id, 'login', 'user', user.id, null, { email: user.email });
  // Token is still issued so the user can call the self-service change endpoint when forced.
  return res.json({
    token: tokenFor(user),
    user: publicUser(user),
    capabilities: capabilitiesForRole(user.role),
    mustChangePassword: mustChangePassword(user)
  });
});

module.exports = router;