var auth = firebaseApp.auth();

//Handle Account Status
auth.onAuthStateChanged(user => {
    if (user) {
        logged_in_user = user;
        switch (mode) {
            case 'login':
                currentRequest.session.loggedIn = true;
                currentRequest.session.email = user.email;
                currentResult.status(200).json({
                    'status': 'login_success',
                    'message': '/upload'
                });
                break;
            case 'register':
                currentResult.status(200).json({
                    'status': 'register_success',
                    'message': 'Successfully registered.<br><a href=' / '>Login</a>'
                });
                break;
        }

    } else logged_in_user = null;
});


router.post('/api/login', function(req, res, next) {
    currentResult = res;
    currentRequest = req;
    var email = req.body.email;
    var password = req.body.password;

    auth.signInWithEmailAndPassword(email, password).catch(function(error) {
        // Handle Errors here.
        var errorCode = error.code;
        var errorMessage = error.message;
        currentRequest.session.loggedIn = false;
        currentRequest.session.email = null;
        res.status(200).send(errorMessage);
    });
});