var socket = null; // The socket, globally accessable
var url = 'ws://127.0.0.1:8000/tracker'; // Socket host
var players; // All players

function doSetupSocket() {
    // Get a WebSocket - browser dependent!
    socket = ("MozWebSocket" in window ? new MozWebSocket(url) : new WebSocket(url));
    socket.onclose = function(msg) {
        alert("Connection closed");
    }
    socket.onmessage = handleUpdate;
}

function login() {
	var command = new Object();
    command.action = "Login";
	nick = document.getElementById('name').value;
    command.data = nick;
    var stringversion = JSON.stringify(command);
    socket.send(stringversion);
}

function sendStart() {
	var command = new Object();
    command.action = "Start";
    command.data = "";
    var stringversion = JSON.stringify(command);
    socket.send(stringversion);
}

function updatePosition(x,y) {
	var command = new Object();
    command.action = "Move";
    command.data = new Array(x,y);
    var stringversion = JSON.stringify(command);
    socket.send(stringversion);
}

function fire() {
	var command = new Object();
    command.action = "Fire";
    command.data = new Array(x,y,player_direction);
    var stringversion = JSON.stringify(command);
    socket.send(stringversion);
}

function handleUpdate(msg)
{
    var info = JSON.parse(msg.data);

	var infoaction = info['action'];
    var infodata = info['data'];

	if (infoaction=="Map") {
		init(); // Map becomes the confirmation of successful login
		mazedata = infodata;
		MAZE_WIDTH = infodata[0].length;
		MAZE_HEIGHT = infodata.length;
	} else if (infoaction=="LoginFail") {
		alert('Username already taken, please choose another');
	} else if (infoaction=="Position") {
		x = infodata['x'];
		y = infodata['y'];
		player_direction = infodata['direction'];
		colour = infodata['colour'];
		draw();
	}
	if (gamestarted==true) {
		if (infoaction=="ActivePlayersList") {
			players = infodata;
			document.getElementById('players').innerHTML = '<font face="verdana" color="#FFFFFF"><b>Players: </b></font>'; // clear players list
			for (var i=0; i<players.length; i++) {
				if (players[i]['x']!=null)
					document.getElementById('players').innerHTML += '<font face="verdana" color="#'+players[i]['colour']+'">'+players[i]['nick']+'</font>, ';
				if (players[i]['nick']==nick)
					updateHealth(players[i]['health']);
			}
			document.getElementById('players').innerHTML = document.getElementById('players').innerHTML.slice(0,-2); // slice off last ", "
			draw();
		} else if (infoaction=="Die") {
			if (infodata==null)
				alert('You have died due to running into a wall');
			else
				alert('You have died due to colliding with '+infodata);
			gamestarted = false;
			drawSplash();
		} else if (infoaction=="DieShot") {
			alert('You have died due to being shot by '+infodata);
			gamestarted = false;
			drawSplash();
		} else if (infoaction=="Fire") {
			draw();
			drawfire(infodata[0],infodata[1],infodata[2]);
		}
	}
}