var express = require('express'),
    app = module.exports = express.createServer(),
    io = require('socket.io').listen(app);


app.configure(function(){
  app.use(express.bodyParser());
  app.use(express.static(__dirname + '/public'));
});

app.listen(3000);

var games = [];

io.sockets.on('connection',function(socket) {
  var game = null;
  for(var i=0;i<games.length;i++) {
    if(games[i].length < 2) {
      game = i;
    }
  }

  if(game === null) {
    games.push([])
    game = games.length-1;
  }

  games[game].push(socket);

  socket.set('game',game);

  if(games[game].length == 2) {
    games[game][0].set('partner',socket);
    games[game][1].set('partner',games[game][0]);

    games[game][0].emit('master');
    games[game][1].emit('slave');
  }

  socket.on('delay',function(data) {
    socket.get('partner',function(err,partner) {
      if(partner) {
        data.steps += 1;
        partner.emit('delay',data);
      } 
    });
  });

  socket.on('move',function(data) {
    socket.get('partner',function(err,partner) {
      if(partner) {
        partner.volatile.emit('move',data);
      } 
    });
  });

  socket.on('ball',function(data) {
    socket.get('partner',function(err,partner) {
      if(partner) {
        partner.volatile.emit('ball',data);
      } 
    });
  });

  socket.on('disconnect',function() {
    socket.get('partner',function(err,partner) {
      if(partner) {
        partner.emit('end');
        partner.set("partner",null);
      }
    });
    socket.get('game',function(err,game) {
      var idx = games[game].indexOf(socket);
      if(idx!=-1) games[game].splice(idx, 1);
    });
  });
});