$(function() {
	
	var totalPanels			= $(".scrollContainer").children().size();
		
	var regWidth			= $(".panel").css("width");
	var regImgWidth			= $(".panel img").css("width");
	var regTitleSize		= $(".panel h2").css("font-size");
	var regParSize			= $(".panel p").css("font-size");
	var regImg				= $(".panel").css("padding-top");
	
	var movingDistance	    = 180;
	
	var curWidth			= 354;
	var curImgWidth			= 330;
	var curTitleSize		= "20px";
	var curParSize			= "18px";
	var curImg				= "10px";
	
	var $panels				= $('#slider .scrollContainer > div');
	var $container			= $('#slider .scrollContainer');

	$panels.css({'float' : 'left','position' : 'relative'});
    
	$("#slider").data("currentlyMoving", false);

	$container
		/*.css('width', ($panels[0].offsetWidth * $panels.length) + 200 )*/
		.css('width', (354 * $panels.length) + 150 )
		.css('left', "-200px");

	var scroll = $('#slider .scroll').css('overflow', 'hidden');

	//funcion que retorna al tamaño normal (pequeño)
	function returnToNormal(element) {
		$(element)
			
			.animate({ width: regWidth })
			.animate({ paddingTop: regImg})
			.find("img")
			.animate({ width: regImgWidth })
		    .end()
			.find("h2")
			.animate({ fontSize: regTitleSize })
			.attr("style", "line-height:inherit; visibility:hidden;")
			.end()
			.find("p")
			.animate({ fontSize: regParSize })
			.attr("style", "visibility:hidden;")
			.end()
			.find("#etiqueta-home")
			.attr("style", "visibility:hidden;");
	};
	
	//funcion que incrementa el tamaño (grande)
	function growBigger(element) {
		$(element)
			
			.animate({ width: curWidth })
			.animate({ paddingTop: curImg })
			.find("img")
			.animate({ width: curImgWidth })
		    .end()
			.find("h2")
			.animate({ fontSize: curTitleSize })
			.attr("style", "line-height:100%; visibility:inherit;")
			.end()
			.find("p")
			.animate({ fontSize: curParSize })
			.attr("style", "visibility:inherit;")
			.end()
			.find("#etiqueta-home")
			.attr("style", "visibility:inherit;");
	}
	
	//direction true = right, false = left
	function change(direction) {
	   
	    //if not at the first or last panel
		if((direction && !(curPanel < totalPanels)) || (!direction && (curPanel <= 1))) { return false; }	
        
        //if not currently moving
        if (($("#slider").data("currentlyMoving") == false)) {
            
			$("#slider").data("currentlyMoving", true);
			
			var next         = direction ? curPanel + 1 : curPanel - 1;
			var leftValue    = $(".scrollContainer").css("left");
			var movement	 = direction ? parseFloat(leftValue, 10) - movingDistance : parseFloat(leftValue, 10) + movingDistance;
		
		
						
			$(".scrollContainer")
				.stop()
				.animate({
					"left": movement
				}, function() {
					$("#slider").data("currentlyMoving", false);
				});
				
				
				
			
			
			returnToNormal("#panel_"+curPanel);
			growBigger("#panel_"+next);
			
			curPanel = next;
			
			//remove all previous bound functions
			$("#panel_"+(curPanel+1)).unbind();	
			
			//go forward
			$("#panel_"+(curPanel+1)).click(function(){ change(true); });
			
            //remove all previous bound functions															
			$("#panel_"+(curPanel-1)).unbind();
			
			//go back
			$("#panel_"+(curPanel-1)).click(function(){ change(false); }); 
			
			//remove all previous bound functions
			$("#panel_"+curPanel).unbind();
		}
	}
	
	
	
	// Set up "Current" panel and next and prev
	growBigger("#panel_3");	
	var curPanel = 3;
	
	$("#panel_"+(curPanel+1)).click(function(){ change(true); });
	$("#panel_"+(curPanel-1)).click(function(){ change(false); });
	
	//when the left/right arrows are clicked
	$(".right").click(function(){ change(true); });
	$(".left").click(function(){ change(false); });
	
	//tiempo en que se hace clik automatico en left
	var theInt = null;
	theInt = setInterval(function(){
	$(".left").click();
	}, 5000);
	
	//termina autoplay en 9 segundos
	setTimeout("clearInterval("+theInt+")",15000);
	
	//cuando se usa alguna de las siguientes teclas
	$(window).keydown(function(event){
	  switch (event.keyCode) {
			case 13: //enter
				$(".right").click();
				break;
			case 32: //space
				$(".right").click();
				break;
	    case 37: //left arrow
				$(".left").click();
				break;
			case 39: //right arrow
				$(".right").click();
				break;
	  }
	});
	
});