/*
 * 	Easy Slider 1.7 - 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',
lastShow:		false,				
vertical:		false,
speed: 			6000,
auto:			false,
pause:			10000,
continuous:		false, 
numeric: 		false,
numericId: 		'controls'
 }; 

 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 clickable = true;
		 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.continuous){
		 $("ul", obj).prepend($("ul li:last-child", obj).clone().css("margin-left","-"+ w +"px"));
		 $("ul", obj).append($("ul li:nth-child(2)", obj).clone());
		 $("ul", obj).css('width',(s+1)*w);
		 };				

		 if(!options.vertical) $("li", obj).css('float','left');

		 if(options.controlsShow){
			 var html = options.controlsBefore;				
			 if(options.numeric){
				 html += '<ol id="'+ options.numericId +'"></ol>';
			 } else {
				 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);										
		 };

		 if(options.numeric){									
			 for(var i=0;i<s;i++){						
				 $(document.createElement("li"))
					 .attr('id',options.numericId + (i+1))
					 .html('<a rel='+ i +' href=\"javascript:void(0);\">'+ (i+1) +'</a>')
					 .appendTo($("#"+ options.numericId))
					 .click(function(){							
							 animate($("a",$(this)).attr('rel'),true);
							 }); 												
			 };							
		 } else {
			 $("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 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",obj).css("margin-left",(t*w*-1));
			 } else {
				 $("ul",obj).css("margin-left",(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 = dir;
					 break; 
				 };	
				 var diff = Math.abs(ot-t);
				 var speed = diff*options.speed;						
				 if(!options.vertical) {
					 p = (t*w*-1);
					 $("ul",obj).animate(
							 { marginLeft: p }, 
							 { queue:false, duration:speed, complete:adjust }
							 );				
				 } else {
					 p = (t*h*-1);
					 $("ul",obj).animate(
							 { marginTop: p }, 
							 { queue:false, duration:speed, complete:adjust }
							 );					
				 };

				 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.numeric) setCurrent(0);

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

 });

 };

})(jQuery);