var http = require('http');
var url = require('url');
var fs = require('fs');
var crypto = require('crypto');
var chance = require('chance');

var salts = new chance();

var waiting = [];
var game_id = [];
function isInteger(x) {
	return x % 1 === 0;
}
check_file();
var headers = {
		plain: {
			'Content-Type': 'application/javascript',
			'Cache-Control': 'no-cache',
			'Access-Control-Allow-Origin': '*'
		},
		sse: {
			'Content-Type': 'text/event-stream',
			'Cache-Control': 'no-cache',
			'Access-Control-Allow-Origin': '*',
			'Connection': 'keep-alive'
		}
};

function check_file()
{
	fs.readFile('dados.json', function(err, data)
			{
		try
		{
			JSON.parse(data.toString());
		}
		catch (e)
		{
			fs.writeFile('dados.json', "[]", function(err){});
		}
			});
	fs.readFile('ranking.json', function(err, data)
			{
		try
		{
			JSON.parse(data.toString());
		}
		catch (e)
		{
			fs.writeFile('ranking.json', "[]", function(err){});
		}
			});
	fs.readFile('join.json', function(err, data)
			{
		try
		{
			JSON.parse(data.toString());
		}
		catch (e)
		{
			fs.writeFile('join.json', "[]", function(err){});
		}
			});
}

function sort_object(object){
	object.sort(function(a, b) {
		if(a.victories==b.victories)
			return parseInt(a.games) - parseInt(b.games);

		return -(parseInt(a.victories) - parseInt(b.victories));

	});

}

function oponent(group,size){
	console.log("entra  waiting");

	if(waiting.length==0){
		console.log("entra vazio waiting");
		return null;
	}
	for(var i = 0; i < waiting.length; i++)
	{
		console.log("entra for waiting");

		if(waiting[i].group == group && waiting[i].size == size)
		{
			var temp = waiting[i];
			waiting.splice(i, 1);
			return temp;
		}
	}

	return null;

}
function newGame(user1,user2,gameID,hash,size){
	var rack=[size];
	for(var i=1;i<=size;i++){
		rack[i]=i;
	}
	var data ={
			board:{
				table: null,
				size: size,
				rack: rack

			},
			user1 :{
				nick : user1
			},
			user2:{
				nick: user2
			},
			game :
			{
				turn: user1,
				hash: hash
			}
	};
	game_id[gameID] = data;
}


var server = http.createServer(function (req, res){
	var preq = url.parse(req.url,true);
	var pathname = preq.pathname;
	var answer = {};
	switch(req.method){
	case "POST":
		doPost(pathname,req,res);
		break;

	/*case "GET":
		doGet(pathname,req,res);
		break;*/


	}
	// res.writeHead(200, headers.plain);
});

server.listen(8080);

function doPost(pathname, req, res){
	var body = "";
	var resposta;
	console.log("do post " + pathname);
	res.setHeader('Access-Control-Allow-Origin','*');
	switch(pathname) {

	case "/join":
		req
		.on("data",function(data) {body +=data})
		.on("end",function(){
			try{
				console.log("create join");
				var file = fs.readFile('join.json', function(err, data) {
					if(!err)
					{
						var flag = 0;
						console.log("entra join if");
						var dados =  JSON.parse(body);
						console.log("dados" + JSON.stringify(dados));
						var group = dados.group;
						var nick = dados.nick;
						var pass = dados.pass;
						var size = dados.size;
						var gameID;
						var opo = oponent(group,size);

						console.log(" opo" + opo);
						if(opo === null){
							waiting.splice(0,0,dados);
							console.log("adicionar a waiting");
							console.log(waiting);

						}
						else{

							if(opo.size === size){
								console.log("possivel jogo");
								console.log(waiting);
								var hash = crypto.createHash('md5').update(salts.string({length:8})).digest('hex');


								gameID++;
								newGame(nick,opo.nick,gameID,hash,size);
								var game_data = game_id[gameID].game.hash;
								//console.log(game_data);
                                var object = {game: game_data};
								if(game_data != hash){
									flag=1;
									res.writeHead(401, {'Content-Type' : 'text/plain'});
									res.end(JSON.stringify({error:"Playing in other game!"}));
								}
								console.log("game data " +JSON.stringify(object))
								fs.writeFile('join.json', JSON.stringify(object), function(err) {
									if (err)
										return console.log(err);

								});
								res.writeHead(200, {'Content-Type' : 'text/plain'});
								res.end(JSON.stringify(object));
							}



						}
						res.end();


					}
					else{
						res.writeHead(404, {'Content-Type' : 'text/plain'});
						res.end();
						console.log("erro join");
					}

				})
			}
			catch(err) { console.log("erro json"); }
		})
		.on("error", function(err) { console.log(err.message); })
		break;

	case "/register":
		req
		.on("data",function(data) {body +=data})
		.on("end",function(){
			try{
				var data = "";

				console.log("createServer");
				var file = fs.readFile('dados.json', function(err, data) {

					if (!err) {
						console.log("entrou no if");
						console.log(body);
						var dados = JSON.parse(body);
						var user = dados.nick;
						var pass = dados.pass;
						console.log("user no register " + user + " pass " + pass);
						var flag = 1;
						var object = JSON.parse(data.toString('utf8'));

						for(var i=0;i<object.length;i++){
							var object_teste = JSON.stringify(object);
							// console.log("for2 user " + object_teste);
							// console.log("for2 pass " +
							// object_teste.body.pass[i]);
							if(object[i].nick === user){
								console.log("This user already exits");
								// var password =
								// crypto.createHash('md5').update(object[i].salt
								// + pass).digest('hex');



								if(pass === object[i].pass){
									console.log("etnra flag2");
									flag=2; // 200
									console.log("falg " + flag);

									break;
								}
								else {
									flag=3; // 401
									console.log("falg " + flag);

									break;
								}

							}
							else{
								flag=1;

							}

						}
						console.log("falg final " + flag);

						if(flag==1){
							var salt = salts.string({length: 4});
							var password = crypto.createHash('md5').update(salt + pass).digest('hex');
							// console.log(" data " + object[0]);
							var savefile = {};
							savefile.nick=user;
							savefile.pass=password;
							savefile.salt=salt;
							// console.log(" body " +
							// JSON.stringify(req.body));
							// console.log("pass " + pass);
							// console.log("pass cri " + password);
							object.push(savefile);
							console.log("aqui " + object);

							fs.writeFile('dados.json', JSON.stringify(object), function(err) {
								if (err)
									return console.log(err);

							});
							res.writeHead(200, {'Content-Type' : 'text/plain'});
							res.write("{}");

						}
						else if(flag==2){
							res.writeHead(200, {'Content-Type' : 'text/plain'});
							res.write("{}");
							console.log("flag2" + flag);

						}
						else{
							res.writeHead(401, {'Content-Type' : 'text/hml'});
							res.write(JSON.stringify({error: "User registered with a different password"}));
							console.log("flag3" + flag);

						}
						res.end();

					}
					else{
						res.writeHead(404, {'Content-Type' : 'text/hml'});
						res.write(JSON.stringify({error: "ERROR"}));
					}
				})}

			catch(err) { console.log("erro json"); /* erros de JSON */ }


		})
		.on("error", function(err) { console.log(err.message); })
		break;

	case "/ranking":
		req
		.on("data",function(data) {body +=data})
		.on("end",function(){
			try{
				console.log("create server ranking");
				var file = fs.readFile('ranking.json', function(err, data) {
					if (!err) {
						console.log(body);
						var dados = JSON.parse(body);

						var size = dados.size;
						console.log("size "  + size +isInteger(size));
						if(isInteger(size) && (size>=2 && size<=10)){
							var object = JSON.parse(data.toString('utf8'));

							console.log("asd " +object);
							if(object[size] != undefined){
								sort_object(object);
								res.writeHead(200, {'Content-Type' : 'text/plain'});
								res.write(JSON.stringify(object[size]));
								console.log(object[size]);
							}
							else{
								res.writeHead(401, {'Content-Type' : 'text/hml'});
								res.write(JSON.stringify({error: "Doens't exits table with this size"}));
								console.log("nao tem tabela");
							}
						}
						else{
							res.writeHead(401, {'Content-Type' : 'text/hml'});
							res.write(JSON.stringify({error: "Size isn't a valid"}));
							console.log("deu erro com size not int");

						}
						res.end();
					}
					else{
						res.writeHead(404, {'Content-Type' : 'text/html'});
						res.end();
						console.log("deu erro");

					}
				});
			}
			catch(err) { console.log("erro json"); /* erros de JSON */ }

		})
		.on("error", function(err) { console.log(err.message); })
		break;



		return;

	}
}