var express = require('express');
var app = express();
var server = require('http').createServer(app);
var io = require('socket.io')(server);
var port = process.env.PORT || 8080;

server.listen(port, function () {
  console.log('Server listening at port %d', port);
});

app.use(express.static(__dirname + '/public'));

io.on('connection', function (socket) {
  socket.on('say', function (data) {
    // send to current request socket client
    socket.emit('message', "this is a test");

    // sending to all clients, include sender
    io.sockets.emit('message', "this is a test");

    // sending to all clients except sender
    socket.broadcast.emit('message', "this is a test");

    // sending to all clients in 'game' room(channel) except sender
    socket.broadcast.to('game').emit('message', 'nice game');

    // sending to all clients in 'game' room(channel), include sender
    io.sockets.in('game').emit('message', 'cool game');

    // sending to individual socketid
    io.sockets.socket(socketid).emit('message', 'for your eyes only');
  });
});