const PORT = process.env.PORT || 8080;
const PREFIX = process.env.PREFIX || '/ws';
const DEV = process.env.DEV || false;
console.log('Socket.io listen on: http://localhost:' + PORT + '' + PREFIX + '/socket.io');
console.log('Publisher listen on: http://localhost:' + PORT + '' + PREFIX + '/pub/$roomID');
if (DEV !== false) {
    console.log('System is on DEV mode');
}

const app = require('express')();
const server = require('http').createServer(app);
var io;

if (DEV !== false) {
    io = require('socket.io')(server, {path: PREFIX + '/socket.io', cors: {origin: '*',}});
} else {
    io = require('socket.io')(server, {path: PREFIX + '/socket.io'});
}

const bodyParser = require('body-parser');


var jsonParser = bodyParser.json();

app.get('/test', function (req, res) {
  //res.send('<script src="/socket.io/socket.io.js"></script><script>  const socket = io("http://localhost");</script>')
  res.sendFile(__dirname + '/public/index.html')
});

app.post('/pub/:roomId', jsonParser, function (req,res) {
    console.log('publish to ' + req.params.roomId + ' data:');
    console.log(req.body);
    io.to(req.params.roomId).emit('data',req.body);
    res.sendStatus(200);
});


io.on('connection',  function(socket) { 
    console.log('new user ' + socket.id);
    if (typeof socket.handshake.query.id !== 'undefined') {
	const room = socket.handshake.query.id;
	socket.join(room);
	console.log('user ' + socket.id + ' joined to room ' + room);
    }
    socket.on('disconnect', () => {
    	    console.log('user ' + socket.id + ' disconnected');
    });
});



server.listen(PORT);