const testPassword = require('model').PasswordField.testSync;
const User = require('./models.js');
const getUrl = require('create-url').getUrl;
const mail = require('mail');
const pug = require('pug');
const config = require('settings/config');

module.exports.redirectIfNotLogged = function(redirectionPage, toDecorate) {
    return function(req, res, render) {
        if (req.session.user === undefined) {
            req.session.redirectAfterLog = redirectionPage;
            req.session.save();
            res.redirect(getUrl('login'));
            return;
        }

        return toDecorate(...arguments);
    };
}

module.exports.login = function(req, res, render) {
    render('login.pug');
}

module.exports.signup = function(req, res, render) {
    render('signup.pug');
}

module.exports.logout = function(req, res, render) {
    req.session.user = undefined;
    req.session.save();
    res.redirect(getUrl("index"));
}

module.exports.loginTarget = function(req, res, render) {
    User.getByUsername(req.body.username, (err, user) => {
        if (user === undefined || !user.active) {
            res.redirect(getUrl('login'));
        } else {
            if (testPassword(req.body.password, user.password)) {
                req.session.user = user;

                let redirection = req.session.redirectAfterLog || 'index';
                req.session.redirectAfterLog = undefined;
                req.session.save();

                res.redirect(getUrl(redirection));
            } else {
                res.redirect(getUrl('login'));
            }
        }
    });
}

module.exports.signupTarget = function(req, res, render) {
    let user = new User();
    user.username = req.body.username;
    user.email = req.body.email;
    user.password = req.body.password;

    require('crypto').randomBytes(48, function(err, buffer) {
        user.activationKey = buffer.toString('hex');
        user.save((err) => {
            res.locals.user = user;

            let baseUrl =
                req.headers.referer.split('/').slice(0, 3).join('/') + '/'

            res.locals.activationUrl =
                baseUrl + 'activate/' + user.activationKey;

            let html = pug.renderFile(
                __dirname + '/templates/validation-mail.pug',
                res.locals,
            );

            mail({
                from: config.MAIL.FROM,
                to: user.username + ' <' + user.email + '>',
                subject: 'Welcome on ADEjs!',
                text:'',
                attachment: [
                    {data: html, alternative: true}
                ]
            }, (err, result) => {
                res.redirect(getUrl('mailWasSent'));
            });

        });
    });
}

module.exports.mailWasSent = function(req, res, render) {
    render('mailWasSent.pug');
}

module.exports.activate = function(req, res, render, next) {
    User.getByActivationKey(req.params.activationKey, (err, user) => {
        if (user === undefined) {
            return next();
        }

        user.active = true;
        user.activationKey = undefined;
        user.save((err, user) => {
            req.session.user = user;
            req.session.save();
            res.redirect(getUrl('index'));
        });
    });
}