var url = require('url');
var md5 = require('md5');

module.exports = function(app) {
    let User = app.models.User;
    let applications = app.get('applications');

    app.get('/', function(req, res) {
        res.render('index.ejs');
    });

    app.post('/login', function(req, res) {
        let user = req.body.user ? req.body.user : "";
        let password = req.body.password;
        let syncOnFail = true;
        let usesEmail = user.indexOf('@') !== -1;

        login();

        function login() {
            let loginInfo = {password: password};

            if (usesEmail)
                loginInfo.email = user;
            else
                loginInfo.username = user;

            User.login(loginInfo, 'user', loginCb);
        }
        function loginCb(err, token) {
            if (err) {
                if (syncOnFail && !usesEmail) {
                    syncOnFail = false;
                    let filter = {where: {name: user}};
                    app.models.Account.findOne(filter, findCb);
                } else
                    badLogin();
                return;
            }

            let parsedLocation;
            let loginUrl;
            let shouldContinue = false;

            if (req.body.location)
                parsedLocation = url.parse(req.body.location, true);

            if (parsedLocation && parsedLocation.query) {
                loginUrl = applications[parsedLocation.query.apiKey];
                shouldContinue = parsedLocation.query.continue;
            }
        
            if (!loginUrl)
                loginUrl = applications.default;

            res.json({
                token: token.id,
                continue: shouldContinue,
                loginUrl: loginUrl
            });
        }
        function findCb(err, instance) {
            if (!instance || instance.password !== md5(password)) {
                badLogin();
                return;
            }

            let where = {id: instance.id};
            let userData = {
                id: instance.id,
                username: user,
                password: password,
                email: instance.email,
                created: instance.created,
                updated: instance.updated
            };
            User.upsertWithWhere(where, userData, login);
        }
        function badLogin() {
            res.status(401);
            res.json({
                message: 'Login failed'
            });
        }
    });

    app.get('/logout', function(req, res) {
        User.logout(req.accessToken.id,
            () => res.redirect('/'));
    });
};