const router = require('express').Router();
const User = require('../models/User');
const auth = require('../middleware/auth');

router.post('/register', async (req, res) => {
  const user = new User(req.body);

  try {
    await user.save();
    const token = await user.generateAuthToken();
    res.status(201).send({ user, token });
  } catch(err) {
    if (err._message) {
      res.status(422).send(err._message);
    } else if (err.code && err.code === 11000) {
      res.status(409).send('User with this email already exist');
    } else {
      res.status(400).send('Could not save the user');
    }
  }
});

router.post('/login', async (req, res) => {
  try {
    const user = await User.findByCredentials(req.body.email, req.body.password);
    const token = await user.generateAuthToken();
    res.send({ user, token });
  } catch (err) {
    res.status(401).send('Could not login');
  }
});

router.post('/logout', auth, async (req, res) => {
  try {
    req.user.tokens = req.user.tokens.filter((token) => {
      return token.token !== req.token;
    });
    await req.user.save();

    res.send();
  } catch (err) {
    res.status(500).send();
  }
});

module.exports = router;