/*
 *  Adapted by Justin Griswold -- http://www.glowview.com 	
 * 	Easy Slider 1.5 - jQuery plugin
 *	written by Alen Grakalic	
 *	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){
	  
		// default configuration properties
		var defaults = {			
			prevId: 		'prevBtn',
			prevText: 		'Previous',
			nextId: 		'nextBtn',	
			nextText: 		'Next',
			controlsShow:	true,
			controlsBefore:	'',
			controlsAfter:	'',	
			controlsFade:	true,
			firstId: 		'firstBtn',
			firstText: 		'First',
			firstShow:		false,
			lastId: 		'lastBtn',	
			lastText: 		'Last',
			paginationID:   'none',			
			lastShow:		false,				
			vertical:		false,
			speed: 			400,
			auto:			false,
			pause:			2000,
			buildPagination:false,
			continuous:		false
		}; 
		
		var options = $.extend(defaults, options);  
				
		this.each(function() {  
			var obj = $(this); 				
			var s = $("li", obj).length;
			var w = $("li", obj).width(); 
			var h = $("li", obj).height(); 
			obj.width(w); 
			obj.height(h); 
			obj.css("overflow","hidden");
			var ts = s-1;
			var t = 0;
			$("ul", obj).css('width',s*w);			
			if(!options.vertical) $("li", obj).css('float','left');
			
			if(options.controlsShow){
				var html = options.controlsBefore;
				if(options.firstShow) html += '<span id="'+ options.firstId +'"><a href=\"javascript:void(0);\">'+ options.firstText +'</a></span>';
				html += ' <span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span>';
				html += ' <span id="'+ options.nextId +'"><a href=\"javascript:void(0);\">'+ options.nextText +'</a></span>';
				if(options.lastShow) html += ' <span id="'+ options.lastId +'"><a href=\"javascript:void(0);\">'+ options.lastText +'</a></span>';
				html += options.controlsAfter;						
				$(obj).after(html);										
			};


/////////////////////////////////////////////////////////////////////


			// add a page button for each li
			if (options.buildPagination)
			{				
				if ($("."+options.paginationID).length)
				{
					$("."+options.paginationID).empty( );
					var x = 0;
					$("li", obj).each(function(){
						$("."+options.paginationID).append('<li><a href="javascript:void(0);" class="text-replace" id="' + options.paginationID + '_' + x + '">' + (x + 1) + '</a></li>');
						
						$("#"+options.paginationID+"_"+x).click(function(){		
							goto($(this).html());
						});	
						x++;
					});
				}
			}
			else // if there is still a pagination, then find it and attach
			{
				if ($("."+options.paginationID).length)
				{
			
					$("."+options.paginationID+" a" ).click(function(){	
						parentId = $(this).parent().attr("id");
						parentSplit = parentId.split("_");
						goto((parentSplit[1]*1)+1);
					});	
					
					$("."+options.paginationID+" a" ).attr("href", "javascript:void(0)");
				}
			}


//////////////////////////////////////////////////////////////////////////


			$("a","#"+options.nextId).click(function(){		
				animate("next",true);
			});
			$("a","#"+options.prevId).click(function(){		
				animate("prev",true);				
			});	
			$("a","#"+options.firstId).click(function(){		
				animate("first",true);
			});				
			$("a","#"+options.lastId).click(function(){		
				animate("last",true);				
			});		
			
			function animate(dir,clicked){
				var ot = t;				
				switch(dir){
					case "next":
						t = (ot>=ts) ? (options.continuous ? 0 : ts) : t+1;						
						break; 
					case "prev":
						t = (t<=0) ? (options.continuous ? ts : 0) : t-1;
						break; 
					case "first":
						t = 0;
						break; 
					case "last":
						t = ts;
						break; 
					default:
						break; 
				};	
				
				var diff = Math.abs(ot-t);
				var speed = diff*options.speed;						
				if(!options.vertical) {
					p = (t*w*-1);
					$("ul",obj).animate(
						{ marginLeft: p }, 
						speed
					);				
				} else {
					p = (t*h*-1);
					$("ul",obj).animate(
						{ marginTop: p }, 
						speed
					);					
				};
				
				if(!options.continuous && options.controlsFade){					
					if(t==ts){
						$("a","#"+options.nextId).hide();
						$("a","#"+options.lastId).hide();
					} else {
						$("a","#"+options.nextId).show();
						$("a","#"+options.lastId).show();					
					};
					if(t==0){
						$("a","#"+options.prevId).hide();
						$("a","#"+options.firstId).hide();
					} else {
						$("a","#"+options.prevId).show();
						$("a","#"+options.firstId).show();
					};					
				};				
				
				if(clicked) clearTimeout(timeout);
				if(options.auto && dir=="next" && !clicked){;
					timeout = setTimeout(function(){
						animate("next",false);
						setLocation();
					},diff*options.speed+options.pause);
				};
				
			};
			// init
			var timeout;
			if(options.auto){;
				timeout = setTimeout(function(){
					animate("next",false);
					setLocation();
				},options.pause);
			};		
		
			if(!options.continuous && options.controlsFade){					
				$("a","#"+options.prevId).hide();
				$("a","#"+options.firstId).hide();				
			};				


/////////////////////////////////////////////////////////////////


			function goto(i){
				t = (i-1);
				p = (t*w*-1);
				$("ul",obj).animate(
					{ marginLeft: p }, 
					options.speed
				);			
				clearTimeout(timeout);
				setLocation();
			}
			
			function jump(i)
			{
				t = (i-1);
				p = (t*w*-1);
				$("ul",obj).css({ marginLeft: p });
				setLocation();
			}
			
			function setLocation()
			{
				$("."+options.paginationID+" a").removeClass("active");
				$("."+options.paginationID+" li").removeClass("active");
				
				$("."+options.paginationID+" li:eq(" + t + ")").addClass("active");
			}
	
			// initial call
			setLocation();
			
			// check the hash
			if (location.hash != "" && location.hash != "#")
			{
				var h = location.hash;
				var i = h.replace("#", "");
				jump(i);
			}
	
	
//////////////////////////////////////////////////////////////////	

	
		});
	  
	};

})(jQuery);