const express = require("express");
const cp = require('child_process');
const router= express.Router();
const detect = require('detect-port');
const oneport = require('oneport');
const fs = require('fs');


let User = require("../DBcollection/user.js");
const detectPort = require("detect-port");

let servers = new Set();

router.get('/', function(req, res) {

    if (req.session.user) {
        // res.render('home', {
        //     user: req.session.user,
        //     title: 'HOME',
        // });

        oneport.acquire(function (err, port) {
            if (err) return console.error(err);
            console.log('port:', port);

            codeserver = cp.execFile('sudo', [
                'PASSWORD=' + req.session.user.password,

                'code-server',

                '--auth=password', 

                '--bind-addr=0.0.0.0:' + port,

        	    '--user-data-dir=/root/codeserver/userdata/' + req.session.user.name + '/', 
                '--extensions-dir=/root/codeserver/extensions/' + req.session.user.name + '/',
                '--config=/root/codeserver/config/' + req.session.user.name,

                '-e',

                '--home=http://106.75.254.18/logoff'
            ], function(error, stdout, stderr) {
                console.log(error + '\n' + stdout + '\n' + stderr);
            });
            servers.add({
                user: req.session.user, 
                server: codeserver
            });
            dirpath = '/root/codeserver/user/' + req.session.user.name + '/'; 
            fs.mkdirSync(dirpath, { recursive: true });
            res.redirect('http://106.75.254.18:' + port + '/?folder=' + dirpath);
        });
    }
    else {
        res.render('home-signin', {
            user: req.session.user,
            title: "user Sign in",
        });
    }

});

router.get('/logoff', function(req, res) {
    servers.forEach(function(server) {
        if (server.user == req.session.user) {
            server.server.exit(0);
            servers.delete(server);    
        }
    })
    delete req.session.user;
    res.redirect('/');
})

router.post('/', function(req, res) {
    let query = {
        name: req.body.name,
        password: req.body.password
    };
    User.findOne(query, function(err, user) {
        if (err) {
            res.end("some thing wrong")
            return console.log(err);
        }
        if (user != undefined) {
            req.session.user = user;
            // return res.render('home', {
            //     title: "HOME",
            //     user: req.session.user
            // });
            return res.redirect('/');
        }
        else {
            return res.render('home-signin', {
                title: "Sorry, no this user",
                user: req.session.user
            })
        }
    });
});

router.get('/signup', function(req, res) {
    res.render('home-signup', {
        user: req.session.user,
        title: "user Sign up",
    });
});

router.post('/signup', function(req, res) {
    User.find({name: req.body.name}, function(err, find) {
        if (find.length) {
            console.log(find);
            res.render("home-signup", {
                user: req.session.user,
                title: "Same User Name - plz try again",
            });
        }
        else {
            let user = new User();

            console.log(user);
            user.name = req.body.name;
            user.password = req.body.password;

            user.save(function(err) {
                if (err) {
                    res.end("some thing wrong");
                    return console.log(err);
                }
                req.session.user = user;
                res.redirect('/');
            });
        }
    });
});


module.exports = router;