var express = require('express')
var app = express()
var bodyParser = require('body-parser');
const mongoose = require('mongoose');
var uuid = require('uuid4');

const Users = mongoose.model('Users', { username: String, password: String, firstname: String, secondname: String, sessionkey: String });

mongoose.connect('mongodb://localhost/test');
app.use(bodyParser.urlencoded());
app.use(bodyParser.json())

app.use(function (req, res, next) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
    next();
});
app.post('/checksession', function (req, res) {
    // req.body.sessionkey
    if (req.body.sessionkey !== null) {
        Users.findOne({ sessionkey: req.body.sessionkey }).exec((err, user) => {

            if (err) {
                return res.json({ message: 'Database error!' })
            }
            if (user == null){
                return res.json({ error: 1 })
            }
            else {
                return res.json({ expired: '0', firstname: user.firstname, erros: 0 })
            }
        })
    }
    else {
        return res.json({ message: 'Nice hacker' })
    }
})

app.post('/register', function (req, res) {
    if (req.body.password !== null || req.body.username !== null || req.body.firstname !== null || req.body.secondname !== null) {
        var newuser = new Users({
            password: req.body.password,
            username: req.body.username,
            firstname: req.body.firstname,
            secondname: req.body.secondname,
            sessionkey: '',
        });
        newuser.save((err, result) => {
            console.log(result._id);
            res.json({ message: "ALL OK!" })
        })
    }
})

app.post('/login', function (req, res) {
    // Filter USERNAME!!! Username is not right -> error!!!

    if (req.body.password !== null || req.body.username !== null) {
        Users.findOne({ username: req.body.username }).exec((err, user) => {
            if (user === null) {
                return res.json({ message: "No user with this username", erros: 1 })
            }

            console.log(user.password);
            console.log(req.body.password);
            if (user.password === req.body.password) {
                var id = uuid();
                user.sessionkey = id
                user.save()
                res.json({ message: "All ok, welcome " + user.firstname, erros: 0, sessionkey: user.sessionkey })
            }
            else {
                res.json({ message: "Uncorrect Password!!!!!", erros: 1 })
            }
        })
    }
    else {
        res.json({ error: "something is null!" })
    }

})

app.listen(5005)