var http = require('http');
var url = require('url');
var fs = require('fs');
var express = require('express'); // Para HTTP
var cors = require('cors'); // Para HTTP com EXPRESS
var position = 1;
var crypto = require('crypto');
var secret = 'abcdefg';
var file_path = 'dados.json';
var chance = require('chance');

var event = express();
event.use(cors());
var salts = new chance();
var bodyParser = require('body-parser'); // Ler body do post
event.use(bodyParser.json());
event.use(bodyParser.urlencoded({
	extended : true
}));
function isInteger(x) {
    return x % 1 === 0;
}
check_file();

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){});
			    }
			});
}

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));

	});

}
event.post('/register', function(req, res) {

	var data = "";

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

		if (!err) {
			console.log("entrou no if");
			//var dados = JSON.parse(data.toString());
			var user = req.body.nick;
			var pass = req.body.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');

					console.log("password " + password);
					console.log("pass " + pass);

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

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

						break;
					}
					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);

				});
			}
			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/html'});
			res.end();
		}

	});
});

event.post('/ranking', function(req, res) {
	console.log("create server ranking");
	var file = fs.readFile('ranking.json', function(err, data) {
		if (!err) {
			console.log("req " + req.body.size);
			var size = req.body.size;
			console.log("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");

		}
	});

});


var server = event.listen(8080);