const passport = require('passport');
const LocalStrategy = require('passport-local').Strategy;
const User = require('./models/User');

passport.use(new LocalStrategy(
  async (username, password, done) => {
    try {
      const user = await User.findOne({ username: username });

      if (!user) {
        return done(null, false, { message: 'Incorrect username.' });
      }
      if (!user.validPassword(password)) { // you will need to implement validPassword method in your User model
        return done(null, false, { message: 'Incorrect password.' });
      }
      return done(null, user);
    } catch (err) {
      return done(err);
    }
  }
));

passport.serializeUser((user, done) => {
  done(null, user.id);
});

passport.deserializeUser(async (id, done) => {
  const user = await User.findById(id);
  done(null, user);
});

module.exports = passport;