const errors = require('restify-errors');

const config = require('../config');

const handlePassportResponse = (req, res, next) => (err, user, info) => {
    if (err) {
      return next(err);
    }

    const isVerifiedUser = user &&
      user.isRegistrationVerified();

    if (user && isVerifiedUser) {
      return res.send({ ...user.toAuthJSON() });
    } else if (user && !isVerifiedUser){
      return res.send({
        registrationSuccess: true,
        nextSteps: 'Check your email for our confirmation email, you will not be able to login without confirming.'
      });
    }

    return res.send(400, info);
};

module.exports = function (server, auth) {
  const { passport } = auth;

  /* Local Auth */
	server.post('/auth', (req, res, next) => {
    const { body: { username = null, password = null } = {} } = req;

    if (!username || !password) {
      let errors = {};

      if (!username) {
        errors.username = 'is required';
      }

      if (!password) {
        errors.password = 'is required';
      }

      return res.send(422, { errors });
    }

    const callback = handlePassportResponse(req, res, next);
    return passport.authenticate('local', { session: false }, callback)(req, res, next);
	});

	/**
	 * SERVICES
	 */

  /* Google */
	server.get(
	  '/auth/google',
	  passport.authenticate('google', { scope: 'profile email', session: false }),
	);

	server.get(
	  '/auth/google/callback',
	  (req, res, next) => {
      const callback = handlePassportResponse(req, res, next);
      return passport.authenticate(
        'google',
        { failureRedirect: '/login' },
        callback,
      )(req, res, next);
    },
	);

  /* Facebook */
	server.get(
	  '/auth/facebook/login',
	  passport.authenticate('facebook', {
	    scope: ['email', 'public_profile'],
	    session: false,
	  }),
	);

	server.get(
	  '/auth/facebook/loggedin',
	  (req, res, next) => {
      const callback = handlePassportResponse(req, res, next);
      return passport.authenticate(
        'facebook',
        { failureRedirect: '/login' },
        callback,
      )(req, res, next);
	  }
	);

	server.get(
	  '/auth/facebook/link',
	  auth.secure,
    (req, res, next) => {
      req.user.record.setLinkCheckBit((err, linkCheckBit) => {
        passport.authenticate('facebookLink', {
          scope: ['email', 'public_profile'],
          session: false,
          state: linkCheckbit,
        })(req, res, next),
      });
    },
	);

	server.get(
	  '/auth/facebook/linked',
	  (req, res, next) => {
	    const linkCheckBit = req.query.state;

      return passport.authenticate(
        'facebook',
        { failureRedirect: '/profile' },
        (err, profile) => {
          if (err) {
            return next(err);
          }

          User.linkFacebookProfile(linkCheckBit, profile, (err, user) => {
            if (err) {
              return next(err);
            }

            if (!user) {
              return next(err, false, 'Linking the account to Facebook was unsuccessful, please try again.');
            }

            res.send({
              success: true,
              info: 'Facerbook account successfully linked',
            });
          });
        },
      )(req, res, next);
	  }
	);
};