$(function() {

	var totalPanels = $(".scrollContainer").children().size();

	var regWidth = $(".panel").css("width");
	var regImgWidth = $(".panel img").css("width");

	var movingDistance = 66;

	var curWidth = 110;
	var curImgWidth = 110;

	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) + 100)
		.css('left', "-68px");

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

	function returnToNormal(element) {
		$(element)
			.animate({ width: regWidth })
			.find("img")
			.animate({ width: regImgWidth })
		    .end();
	};

	function growBigger(element) {
		$(element)
			.animate({ width: curWidth })
			.find("img")
			.animate({ width: curImgWidth })
		    .end();
	}

	//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;
		}
	});

});