/*
 * 	Easy Slider 1.8 - jQuery plugin
 *	written by Alen Grakalic (modified by Kyle Florence - kyle.florence@gmail.com)
 *	http://cssglobe.com/post/4004/easy-slider-15-the-easiest-jquery-plugin-for-sliding
 *
 *	Copyright (c) 2009 Alen Grakalic (http://cssglobe.com)
 *	Dual licensed under the MIT (MIT-LICENSE.txt)
 *	and GPL (GPL-LICENSE.txt) licenses.
 *
 *	Built for jQuery library
 *	http://jquery.com
 *
 *	markup example for $("#slider").easySlider();
 *
 * 	<div id="slider">
 *		<ul>
 *			<li><img src="images/01.jpg" alt="" /></li>
 *			<li><img src="images/02.jpg" alt="" /></li>
 *			<li><img src="images/03.jpg" alt="" /></li>
 *			<li><img src="images/04.jpg" alt="" /></li>
 *			<li><img src="images/05.jpg" alt="" /></li>
 *		</ul>
 *	</div>
 *
 */
(function($)
{
	$.fn.easySlider = function(options)
	{
		var defaults = {
				prevId: 				'prevBtn',
				prevText: 			'Previous',
				nextId: 				'nextBtn',
				nextText: 			'Next',
				controlsShow: 	true,
				controlsBefore: '',
				controlsAfter:	'',
				controlsFade: 	true,
				insertAfter:		true,
				firstId:				'firstBtn',
				firstText:			'First',
				firstShow:			false,
				lastId: 				'lastBtn',
				lastText: 			'Last',
				lastShow: 			false,
				vertical: 			false,
				speed:					800,
				ease: 					'swing',
				auto: 					false,
				pause:					2000,
				continuous: 		false,
				prevNext: 			true,
				numeric:				false,
				numericId:			'controls'
		};
		var options = $.extend(defaults, options);
		this.each(function()
		{
			var obj = $(this);
			// Fix for nested list items
			var ul = obj.children("ul");
			var li = ul.children("li");
			var s = li.length;
			var w = obj.width();
			var h = $("li", obj).height();
			//var h = obj.height();
			
			var t = 0;
			var ts = s-1;
			var clickable = true;

			// Set obj overflow to hidden
			obj.css("overflow","hidden");

			// Set width/height of list items based on width/height of obj
			li.each(function() {
					if(options.vertical) $(this).height(h);
					else $(this).width(w);
			});

			// Float items to the left
			li.css('float', 'left');

			// Set width/height of ul
			if(options.vertical) ul.height(s*w);
			else ul.width(s*h);

			// Clone elements for continuous scrolling
			if(options.continuous)
			{
					if(options.vertical)
					{
							ul.prepend(li.filter(":last-child").clone().css("margin-top","-"+ h +"px"));
							ul.append(li.filter(":nth-child(2)").clone());
							ul.height((s+1)*h);
					} else {
							ul.prepend(li.filter(":last-child").clone().css("margin-left","-"+ w +"px"));
							ul.append(li.filter(":nth-child(2)").clone());
							ul.width((s+1)*w);
					}
			};

			if(options.controlsShow)
			{
					var html = options.controlsBefore;
					if(options.numeric){
							html += '<ol id="'+ options.numericId +'"></ol>';
					}
					if(options.firstShow) {
							html += '<span id="'+ options.firstId +'"><a href="#">'+ options.firstText +'</a></span>';
					}
					if(options.prevNext){
							html += '<span id="'+ options.prevId +'"><a href="#">'+ options.prevText +'</a></span>';
							html += '<span id="'+ options.nextId +'"><a href="#">'+ options.nextText +'</a></span>';
					}
					if(options.lastShow) {
							html += '<span id="'+ options.lastId +'"><a href="#">'+ options.lastText +'</a></span>';
					}
					html += options.controlsAfter;

					if (options.insertAfter) $(obj).after(html);
					else $(obj).before(html);
			};

			if(options.numeric)
			{
					for(var i=0;i<s;i++)
					{
							$(document.createElement("li"))
									.attr('id',options.numericId + (i+1))
									.html('<a rel="'+ i +'" href="#"><span>'+ (i+1) +'</span></a>')
									.appendTo($("#"+ options.numericId))
									.click(function(){
											animate($("a",$(this)).attr('rel'),true);
											return false;
									});
					};
			}

			if(options.prevNext)
			{
					$("a","#"+options.nextId).click(function(){
							animate("next",true); return false;
					});
					$("a","#"+options.prevId).click(function(){
							animate("prev",true); return false;
					});
					$("a","#"+options.firstId).click(function(){
							animate("first",true); return false;
					});
					$("a","#"+options.lastId).click(function(){
							animate("last",true); return false;
					});
			};

			function setCurrent(i)
			{
					i = parseInt(i)+1;
					$("li", "#" + options.numericId).removeClass("current");
					$("li#" + options.numericId + i).addClass("current");
			};

			function adjust()
			{
					if(t>ts) t=0;
					if(t<0) t=ts;
					if(!options.vertical) {
							ul.css("margin-left",(t*w*-1));
					} else {
							ul.css("margin-top",(t*h*-1));
					}
					clickable = true;
					if(options.numeric) setCurrent(t);
			};

			function animate(dir,clicked)
			{
				if (clickable)
				{
					clickable = false;
					var ot = t;
					switch(dir)
					{
						case "next":
								t = (ot>=ts) ? (options.continuous ? t+1 : ts) : t+1;
								break;
						case "prev":
								t = (t<=0) ? (options.continuous ? t-1 : 0) : t-1;
								break;
						case "first":
								t = 0;
								break;
						case "last":
								t = ts;
								break;
						default:
								t = parseInt(dir);
								break;
					};
					var diff = Math.abs(ot-t);
					var speed = diff*options.speed;
					if(!options.vertical) {
							p = (t*w*-1);
							ul.animate(
									{ marginLeft: p },
									{
											queue:false,
											duration:speed,
											easing:options.ease,
											complete:adjust
									}
							);
					}
					else {
						p = (t*h*-1);
						ul.animate(
								{ marginTop: p },
								{
										queue:false,
										duration:speed,
										easing:options.ease,
										complete:adjust
								}
						);
					};
					if(!options.continuous && options.controlsFade)
					{
							if(t==0){
									$("a","#"+options.prevId).fadeOut('slow');
									$("a","#"+options.firstId).fadeOut('slow');
							} else if(t==ts){
									$("a","#"+options.nextId).fadeOut('slow');
									$("a","#"+options.lastId).fadeOut('slow');
							} else {
									$("a","#"+options.prevId).fadeIn('slow');
									$("a","#"+options.firstId).fadeIn('slow');
									$("a","#"+options.nextId).fadeIn('slow');
									$("a","#"+options.lastId).fadeIn('slow');
							};
					};
					if(clicked) clearTimeout(timeout);
					if(options.auto && dir=="next" && !clicked){;
							timeout = setTimeout(function(){
								animate("next",false);
							},diff*options.speed+options.pause);
					};
				};
			};
			// init
			var timeout;
			if(options.auto){;
					timeout = setTimeout(function(){
							animate("next",false);
					},options.pause);
			};

			if(options.numeric) setCurrent(0);

			if(!options.continuous && options.controlsFade){
					$("a","#"+options.prevId).hide();
					$("a","#"+options.firstId).hide();
			};
		});
	};
})(jQuery);