/*
 * 	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 $("#slider").easySlider();
 *	
 * 	<div id="slider">
 *		<ul>
 *			<li><img src="images/01.jpg" alt="" /></li>
 *			<li><img src="images/02.jpg" alt="" /></li>
 *			<li><img src="images/03.jpg" alt="" /></li>
 *			<li><img src="images/04.jpg" alt="" /></li>
 *			<li><img src="images/05.jpg" alt="" /></li>
 *		</ul>
 *	</div>
 *
 */
 var cntR = 0;
var direction='r';
(function($) {

	$.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_easy: 			800,
			auto:			false,
			pause_easy:			2000,
			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#mainSlide", 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);				
			});		
			
			function animate(dir,clicked){
				var ot = t;
				var temp;
				cntR++;
				/*if(dir=='next' && direction=='f'){
					dir = 'prev';
				}*/
				var len= $("#slider ul#mainSlide li").length-1;
				switch(dir){
					case "next":
						temp = t;
					    t = (ot>=ts) ? (options.continuous ? 0 : ts) : t+1;						
						if(t==0 || direction=='f'){
							if(t==0 && direction=='f'){
								direction = 'r';
								t=temp+1;
							}else{
							 if(temp!=0){
							  direction = 'f';
							  t = temp-1;
							 }else{
								 direction = 'r';
							 }
							}
						}
						if(t>0){
							$("#prevBtn").show();
						}else{
							$("#prevBtn").hide();
						}
						
						if(t==len){
							$("#nextBtn").hide();
						}else{
							$("#nextBtn").show();
						}


						break; 
					case "prev":
						t = (t<=0) ? (options.continuous ? ts : 0) : t-1;
						if(t>0){
							$("#prevBtn").show();
						}else{
							$("#prevBtn").hide();
						}
						
						if(t==4){
							$("#nextBtn").hide();
						}else{
							$("#nextBtn").show();
						}
						break; 
					case "first":
						t = 0;
						break; 
					case "last":
						t = ts;
						break; 
					default:

						break; 
				};	
				//alert(direction+"==="+ot+"==="+t);
				var diff = Math.abs(ot-t);
				diff=1;
				
				var speed_easy = diff*options.speed_easy;	
				$("#showalert").html("pasuse:"+options.pause_easy+"<br>speed:"+options.speed_easy+"<br>custom speed:"+speed_easy+"<br>count:"+cntR);
				if(!options.vertical) {
					p = (t*w*-1);
					$("ul#mainSlide",obj).animate(
						{ marginLeft: p }, 
						speed_easy
					);				
				} else {
					p = (t*h*-1);
					$("ul#mainSlide",obj).animate(
						{ marginTop: p }, 
						speed_easy
					);					
				};
				
				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);
					timeout = setTimeout(function(){
						animate("next",false);  
					},diff*options.speed_easy+options.pause_easy);
				}
				
				if(options.auto && dir=="next" && !clicked){
					clearTimeout(timeout);
					timeout = setTimeout(function(){
						animate("next",false);  
					},diff*options.speed_easy+options.pause_easy);
				};
				//$("#showalert").html("pasuse:"+options.pause_easy+"<br>speed:"+options.speed_easy+"<br>custom speed:"+speed_easy+"<br>count:"+cntR);
			};
			// init
			var timeout;
			if(options.auto){
				clearTimeout(timeout);
				timeout = setTimeout(function(){
					animate("next",false);
				},options.pause_easy);
			};		
		
			if(!options.continuous && options.controlsFade){					
				$("a","#"+options.prevId).hide();
				$("a","#"+options.firstId).hide();				
			};				
			
		});
	  
	};

})(jQuery);