const jwt = require("jsonwebtoken");
const express = require("express");
const crypto = require("crypto");
const Router = express.Router();
const config = require("../../config");
const UserException = require("../../exceptions").UserException;
const User = require("../middleware/sequelize").user;

Router.get("/", (req,res,next) => {
    if(!req.body.login)
        return next(new UserException("Login nie może być pusty!"));
    else if(!req.body.password)
        return next(new UserException("Hasło nie może być puste!"));
    User.findOne({
        where: { login: req.body.login }
    }).then(function(user) {
        if(user) {
            if(user.password == crypto.createHash("sha256").update(req.body.password).digest("hex")) {
                userId = user.id
                jwt.sign({userId}, config.jwtsign, (err, token) => {
                    res.json(token).status(200);
                });
            } else
            return next(new UserException("Podano zły login lub hasło"));
        } else
            return next(new UserException("Podano zły login lub hasło"));
    });
});

Router.get("/check", (req,res,next) => {
    const bearerHeader = req.headers['authorization'];
    if(typeof bearerHeader !== 'undefined') {
        const bearer = bearerHeader.split(' ');
        const bearerToken = bearer[1];
        jwt.verify(bearerToken, config.jwtsign, (err, authData) => {
            if(err) {
                res.sendStatus(401);
            } else {
                User.findOne({
                    attributes: [ `id`, `login`, `email` ],
                    where: { id: authData.userId }
                }).then(user => {
                    res.json({
                        id: user.id,
                        login: user.login,
                        email: user.email,
                    });
                });
            }
        });
    } else {
        res.sendStatus(401);
    }
});

module.exports = Router;