$(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 movingDistance	    = 250;
	
    var curWidth			= 175;
    var curImgWidth			= 150;
    var curTitleSize		= "16px";
    var curParSize			= "12px";

    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('left', "-90px");

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

    function returnToNormal(element) {
        $(element)
        .animate({
            width: regWidth
        })
        .find("img")
        .animate({
            width: regImgWidth
        })
        .end()
        .find("h2")
        .animate({
            fontSize: regTitleSize
        })
        .end()
        .find("p")
        .animate({
            fontSize: regParSize
        });
    }
	
    function growBigger(element) {
        $(element)
        .animate({
            width: curWidth
        })
        .find("img")
        .animate({
            width: curImgWidth
        })
        .end()
        .find("h2")
        .animate({
            fontSize: curTitleSize
        })
        .end()
        .find("p")
        .animate({
            fontSize: curParSize
        });
    }
	
    //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);
    });
	
    $(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;
        }
    });
	
});