const passport = require('passport');
const FacebookStrategy = require('passport-facebook').Strategy;

const config = require('../../config');
const User = require('../../models/user');

module.exports = function(passport) {
  passport.use(new FacebookStrategy(
    {
      clientID: config.services.facebook.appId,
      clientSecret: config.services.facebook.appSecret,
      callbackURL: 'http://localhost:3001/auth/facebook/callback',
      profileFields: ['id', 'email', 'first_name', 'last_name', 'picture'],
    },
    (accessToken, refreshToken, profile, done) => {
      const {
        email,
        first_name: firstName,
        id: userId,
        last_name: lastName,
        picture: { data: { url = null } = {} } = {},
      } = profile._json;
      const avatar = url;

      User.findOneAndUpdateOrCreate(
        {
          email,
        },
        {
          accessToken,
          method: profile.provider,
          userId,
        },
        {
          avatar,
          email,
          firstName,
          lastName,
        },
        (err, user) => {
          return done(err, user, { accessToken, refreshToken });
        }
      );
    }
  ));
};