var cards=["ciri.png","geralt.png","jaskier.png","jaskier.png","iorweth.png","triss.png","geralt.png","yen.png","ciri.png","triss.png","yen.png","iorweth.png"];

var c0=document.getElementById("c0");
var c1=document.getElementById("c1");
var c2=document.getElementById("c2");
var c3=document.getElementById("c3");

var c4=document.getElementById("c4");
var c5=document.getElementById("c5");
var c6=document.getElementById("c6");
var c7=document.getElementById("c7");

var c8=document.getElementById("c8");
var c9=document.getElementById("c9");
var c10=document.getElementById("c10");
var c11=document.getElementById("c11");

c0.addEventListener("click",function() {revealCard(0); });
c1.addEventListener("click",function(){revealCard(1);});
c2.addEventListener("click",function(){revealCard(2);});
c3.addEventListener("click",function(){revealCard(3);});

c4.addEventListener("click",function(){revealCard(4);});
c5.addEventListener("click",function(){revealCard(5);});
c6.addEventListener("click",function(){revealCard(6);});
c7.addEventListener("click",function(){revealCard(7);});

c8.addEventListener("click",function(){revealCard(8);});
c9.addEventListener("click",function(){revealCard(9);});
c10.addEventListener("click",function(){revealCard(10);});
c11.addEventListener("click",function(){revealCard(11);});

var oneVisible=false;
var turnCounter=0;
var visible_nr;
var lock = false;
var pairsLeft=6;

function revealCard(nr)
{
	var opacityValue=$('#c'+nr).css('opacity');
	if(opacityValue!=0 && lock==false)
	{
		lock=true;
		var obraz="url("+cards[nr]+")";
	$('#c'+nr).css('background-image',obraz);
		$('#c'+nr).addClass('cardA');
		$('#c'+nr).removeClass('card');
		
		if(oneVisible==false)
		{
			oneVisible=true;
			visible_nr=nr;
			lock=false;
		}
		else
		{
			if(cards[visible_nr]==cards[nr])
			{	
				setTimeout(function() { hide2Cards(nr,visible_nr)},750);
				
			}
			else
			{
				setTimeout(function() { restore2Cards(nr,visible_nr)},750);
			}
			turnCounter++;
			$('.score').html('Turn counter:  '+turnCounter);
			oneVisible=false;
		}
	}
	
}
function hide2Cards(nr1,nr2)
{
	$('#c'+nr1).css('opacity','0');
	$('#c'+nr2).css('opacity','0');
	pairsLeft--;
	if(pairsLeft==0)
	{
		$('.board').html('<h1>You win!<br/>Done in '+turnCounter+' turns</h1>');
	}
	lock=false;
	
}
function restore2Cards(nr1,nr2)
{
	$('#c'+nr1).css('background-image','url(karta.png)');
		$('#c'+nr1).addClass('card');
	$('#c'+nr1).removeClass('cardA');	
		
		$('#c'+nr2).css('background-image','url(karta.png)');
		$('#c'+nr2).addClass('card');
	$('#c'+nr2).removeClass('cardA');	
		lock=false;
}