/*
 * 	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>
 *
 */
 
 /*
 * Easy Slider 1.5.t - jQuery plugin
 * written by Tony huang
 * http://www,ifinif.com
 * 2010-6-24
*/
(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',
			lastShow:		  false,				
			vertical:		  false,
			speed: 			  800,
			auto:			  false,
			pause:			  2000,
			continuous:		  false,
			
			t_controlsId:     'tContorls',
			t_ThumbnailCount: 0,
			t_NextID:         'tNextBtn',
			t_PrevID:         'tPrevBtn'
		}; 
		
		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();
			
            var ctl_obj = $("#"+options.t_controlsId);
			var ctl_c = options.t_ThumbnailCount;
			var ctl_s = $("li", ctl_obj).length;
			var ctl_w = $("li", ctl_obj).width()+4;
			var ctl_h = $("li", ctl_obj).height();
			$("li", ctl_obj).css("background-color","#fff");
			obj.width(w); 
			obj.height(h); 
			obj.css("overflow","hidden");
			var ts = s-1;			
			var t = 0;
			
			var ctl_ts = ctl_s-1;
			var ctl_t = 0;
			var isCtlAnimate = false;
			
			$("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);					
			};
	
			$("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);				
			});		
			
			$("#" + options.t_PrevID).click(function(){
			    ctlAnimate('prev',true);
			});
			
			$("#" + options.t_NextID).click(function(){
			    ctlAnimate('next',true);
			});
			
			$("img",ctl_obj).click(function(){
			    var ctl_i = $("img",ctl_obj).index($(this));			    
			    clearTimeout(timeout);
			    ctlAnimate('','',ctl_i);
			    animate('next',false,ctl_i);
			});
			
			function ctlAnimate(dir,clicked,index){
			    isCtlAnimate = true;
			    var ctl_ot = ctl_t;
			    switch(dir){
					case "next":
						ctl_t = (ctl_ot>=ctl_ts) ? (options.continuous ? 0 : ctl_ts) : ctl_t+1;						
						break; 
					case "prev":
						ctl_t = (ctl_t<=0) ? 0 : ctl_t-1;						
						break; 
			    }
			    			    
			    
				if(index!=null)
				    ctl_t = index;				    
				    
				var ctl_diff = Math.abs(ctl_ot-ctl_t);
				var ctl_speed = ctl_diff*options.speed/2;
				if(ctl_t+ctl_c <= ctl_s){
				
				    ctl_p = (ctl_t*ctl_w*-1);							
                    $("ul",ctl_obj).animate(
						    { marginLeft: ctl_p }, 
						    ctl_speed
                    );
                }
                isCtlAnimate = false;
			};
			
			function animate(dir,clicked,index){
				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; 
				};	
				if(index!=null)
				    t = index;
				
				
				$("li",ctl_obj).css({"border":"1px #ccc solid","padding":"0"});
				$($("li",ctl_obj)[t]).css({"border":"1px #ccc solid","border-top":"6px #000 solid","padding-top":"1"});
				
				if(!isCtlAnimate)
				    ctlAnimate('','',t);								
				
				
				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);
					},diff*options.speed+options.pause);
				};
				
			};
			// init
			var timeout;
			if(options.auto){;
				timeout = setTimeout(function(){
					animate("next",false);
				},options.pause);
			};		
		
			if(!options.continuous && options.controlsFade){					
				$("a","#"+options.prevId).hide();
				$("a","#"+options.firstId).hide();				
			};				
			
		});
	  
	};

})(jQuery);