// Include dependencies
var app = require('express')();
var http = require('http').createServer(app);
var io = require('socket.io')(http)

// Set variables
const port = 9966;
var users = 0;

// Serve Client
app.get('/', function(req, res){
    res.sendFile(__dirname + '/index.html');
});

// Socket.io server side
io.on('connection', function (socket) {
    // Log connects / disconnects
    console.log('User connected');
    socket.emit('user_identify');

    socket.on('user_login', function (username) {
        io.emit('message_receive', { 'username': 'Server', 'message': `${username} has connected`});
    });

    users++;
    socket.on('disconnect', function () {
        console.log('User disconnected');
        users--;
    });
    console.log(`Users online: ${users}`);

    // Handle messages
    socket.on('message_send', function (msg) {
        console.log(msg.username + ': ' + msg.message);
        io.emit('message_receive', msg);
    });
});

// Log on server
http.listen(port, function() {
    console.log(`Listening on port ${port}`);
});