const express = require('express');
const router = express.Router();
const registerValidator = require('../validators/register');
const authMw = require('../session');
const pwMw = require('../password.js');
const database = require('../database.js');
const dbConnection = database.db;
const Sequelize = require('sequelize');
const pageTitle = 'Domain Manager | Register';

router.get('/register', authMw.AllowIfNotAuthenticated, async (req, res) => {
    res.render('register', { title: pageTitle, csrfToken: req.csrfToken() });
});

router.post('/register', authMw.AllowIfNotAuthenticated, async (req, res, next) => {
    const reqBody = req.body;
    const validationResult = registerValidator.test(reqBody);
    const validationError = validationResult.error;
    let errors = [];

    if(validationError !== undefined)
        errors = validationError.details;

    try {
        if(errors.length === 0) {
            const hashedPassword = await pwMw.HashPassword(reqBody.register_password);
            const result = await dbConnection.transaction(async(t) => {
                const user = await database.models.User.create({
                    username: reqBody.register_username,
                    password: hashedPassword,
                }, {transaction: t});

                return user;
            });

            if(result !== undefined) {
                await authMw.CreateSession(req, result);
                return res.redirect('/');
            } else {
                errors.push({message: 'Failed to create user.'})
            }
        }
    } catch(error) {
        if(error instanceof Sequelize.UniqueConstraintError) {
            errors.push({message: 'Username is in use.'});
        } else {
            error.status = 500;
            return next(error);
        }
    }

    // if we're here we failed, I specify true for csrfToken to force reset it
    return res.render('register', {title: pageTitle, errors: errors, csrfToken: req.csrfToken(true) });
});

module.exports = router;