var WebSocket = require('websocket').server,
	Http      = require('http'),
	Config    = require('config');


console.log("========= Start ===========");
console.log(new Date());
console.log("NODE_ENV="+process.env.NODE_ENV);
console.log("NODE_PATH="+process.env.NODE_PATH);
console.log("port="+Config.websocket.port);
console.log("=================================");


var connectWebSockets   = {};
var accessHeader = null;

var main = function() {
	var createMain = function(port) {
		return function() {
			var HttpServer = Http.createServer(httpHandler);
			HttpServer.listen(port);
			var ws = new WebSocket({
				httpServer: HttpServer,
				autoAcceptConnections:true
			});
			ws.on('connect',webSocketConnectHandler);
            HttpServer.on('upgrade', function(req, socket, head) {
                 console.log("HttpServer upgrade.");
                accessHeader = req.headers;
            });
        };
	};


	var main1 = createMain(Config.websocket.port);

	main1();
};



var httpHandler = function(req,res) {

    console.log('httpHandler access.' + req.url);
	res.writeHead(200,{"Content-Type": 'text/plain'});
	
	res.write('Node HTTP Access.');
	res.end();

};


var webSocketConnectHandler = function(con) {
	var from = null;
	var to = null;
    con.on('upgrade', function(req, socket, head) {
        console.log("webSocketConnectHandler upgrade.");
        console.log(req);
    });


	con.on('message', function(data)
	{
        console.log("webSocketConnectHandler message.");
        console.log("from="+ from + " to="+to + " data.utf8Data="+data.utf8Data);

		var packet;
		try
		{
			packet = JSON.parse(data.utf8Data);
		}catch(ex)
		{
            console.log("json Parse Error. " + data.utf8Data );
			return;
		}

        var currentFrom = packet['from'];
		var currentTo   = packet['to'];
		var type        = packet['type'];

		if(currentFrom == "")
		{
			return;
		}

        if (from == null) {
            from = currentFrom;
        }

		connectWebSockets[from]  = con;
        to = currentTo ;
		var relayTo = connectWebSockets[to];
        var ret = '';
        try
        {
            ret = JSON.parse(data.utf8Data);
            ret["serverTime"] =  new Date();
            var json_text = JSON.stringify(ret);
        }catch(ex)
        {
            console.log("Json Parse Error . " + data.utf8Data );
            return;
        }

        console.log("return json_text="+json_text);
        relayTo.send(json_text);
	});

	con.on('close',function(code, desc) {
        console.log("webSocketConnectHandler close.");
		delete connectWebSockets[from];
        console.log("close. code="+code+" desc=" + desc + " from="+from+" to="+to);
	});
};

main();