/*
 * 	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: 			800,
			auto:			false,
			pause:			2000,
			continuous:		false, 
			numeric: 		false,
			numericId: 		'controls',
			animation: 		'slide'
		}; 
		
		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;	
			
			if ( options.animation == 'fade' ) {
				ts = s;
				t = 1;
				$("li", obj)
					.css('position', 'relative')
					.css('top', '0')
					.css('left', '0')
					.css('display', 'none')
					.css('z-index', '10');
				$("li:first", obj)
					.css('display', 'block');
			}
			else {
				$("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 {
				if ( options.animation == 'fade' ) {
					$("a","#"+options.nextId).click(function(){		
						animateFade("next",true,false);
					});
					$("a","#"+options.prevId).click(function(){		
						animateFade("prev",true,false);				
					});	
					$("a","#"+options.firstId).click(function(){		
						animateFade("first",true,false);
					});				
					$("a","#"+options.lastId).click(function(){		
						animateFade("last",true,false);				
					});
				}
				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 ( options.animation == 'fade' ) {
					if ( t > ts ) t = 1;
					if ( t < 0 ) t = ts;
				}
				else {
					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);
				}
			};
			
			$('.thumbnail_click').click(function (e) {
				e.preventDefault();
				
				id = $(this).attr('id').split('_');
				
				if ( options.animation == 'fade' ) {
				 	animateFade("goTo",true,id[1]);
				}
			});
			
			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);
					};
			
				};
				
			};
			
			function animateFade(dir,clicked,id) {
				var ot = t;				
				switch(dir){
					case "next":
						//t = (t >= ts ) ? 1 : t+1;				
						t = ( ot >= ts + 1 ) ? 1 : t+1;
						break; 
					case "prev":
						//t = ( t <= 0 ) ? ts : t-1;
						t = ( ot <= 1 ) ? ts : t-1;
						break; 
					case "first":
						t = 0;
						break; 
					case "last":
						t = ts;
						break;
					case "goTo":
						t = parseInt(id) + 1;
						break; 
					default:
						t = ot;
						break; 
				};
				
				//$('h3').html(ot + '-' + t);
				
				$('li:nth-child('+ot+')', obj).fadeOut(options.speed, function() {
					$('li:nth-child('+t+')', obj).fadeIn(options.speed);
				});
				
				adjust(); 
				
				if(clicked) clearTimeout(timeout);
				if(options.auto && dir=="next" && !clicked){;
					timeout = setTimeout(function(){
						animateFade("next",false,false);
					},options.speed+options.pause);
				};
			};
			
			// init
			var timeout;
			if(options.auto){;
				if ( options.animation == 'fade' ){
					timeout = setTimeout(function(){
						animateFade("next",false,false);
					},options.pause);
				}
				else {
					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);