$(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 = 300;

    var curWidth = 350;
    var curImgWidth = 326;
    var curTitleSize = "20px";
    var curParSize = "15px";

    var $panels = $('#slider .scrollContainer > div');
    var $slider = $("#slider");
    var $container = $slider.find('div.scrollContainer');
    

    $panels.css({ 'float': 'left', 'position': 'relative' });

    $("#slider").data("currentlyMoving", false);

    $container
		.css('width', ($panels[0].offsetWidth * $panels.length) + 100)
		.css('left', "-350px");

    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 });
    }

    function returnToNormalInstant(element) {
        $(element)
			.css({ width: regWidth })
			.find("img")
			.css({ width: regImgWidth })
		    .end()
			.find("h2")
			.css({ fontSize: regTitleSize })
			.end()
			.find("p")
			.css({ fontSize: regParSize });
    };

    function growBiggerInstant(element) {
        $(element)
			.css({ width: curWidth })
			.find("img")
			.css({ width: curImgWidth })
		    .end()
			.find("h2")
			.css({ fontSize: curTitleSize })
			.end()
			.find("p")
			.css({ 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 = $container.css("left");

            //alert('1:'+leftValue);
            continuous = false;
            if (curPanel >= totalPanels - 1) {
                leftValue = 0 - 50; continuous = true; next = 3;
                returnToNormalInstant("#slider .panel_" + curPanel);
                growBiggerInstant("#slider .panel_" + 2);
                $container.css({ "left": leftValue });

                curPanel = 2;
            }
            //alert('2:'+leftValue);

            var movement = direction ? parseFloat(leftValue, 10) - movingDistance : parseFloat(leftValue, 10) + movingDistance;

            $container
				.stop()
				.animate({
				    "left": movement
				}, function() {
				    $slider.data("currentlyMoving", false);
				});

            returnToNormal("#slider .panel_" + curPanel);
            growBigger("#slider .panel_" + next);

            curPanel = next;

            //remove all previous bound functions
            $("#slider .panel_" + (curPanel + 1)).unbind();

            //go forward
            $("#slider .panel_" + (curPanel + 1)).click(function() { change(true); });

            //remove all previous bound functions															
            $("#slider .panel_" + (curPanel - 1)).unbind();

            //go back
            $("#slider .panel_" + (curPanel - 1)).click(function() { change(false); });

            //remove all previous bound functions
            $("#slider .panel_" + curPanel).unbind();
        }
    }

    // Set up "Current" panel and next and prev
    growBigger("#slider .panel_3");
    var curPanel = 3;

    $("#slider .panel_" + (curPanel + 1)).click(function() { change(true); });
    $("#slider .panel_" + (curPanel - 1)).click(function() { change(false); });

    //when the left/right arrows are clicked
    $slider.find("img.right").click(function() { change(true); });
    $slider.find("img.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;
        }
    });

    setInterval(function() { $(".right").click() }, 5000);

});