/*
 * 	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
 *
 */

(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: 		'fade',
			buttons:		'style1'
		}; 
		
		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.css("overflow","hidden");			
			$("ul li", obj).show();
			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 +'" class="prev-button"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span>';
					html += ' <span id="'+ options.nextId +'" class="next-button"><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>';
					if (options.buttons == 'style3' || options.buttons == 'style4' || options.buttons == 'style5') {
						if (options.buttons == 'style5') arrowSize = '18';
						else arrowSize = '38';						
						html += '<span id="'+ options.prevId +'-arrow" class="slider-arrow left-arrow-'+arrowSize+' prev-arrow"></span><span id="'+ options.nextId +'-arrow" class="slider-arrow right-arrow-'+arrowSize+' next-arrow"></span>';
						html += '<div id="'+ options.prevId +'-hs" class="prev-hs"></div><div id="'+ options.nextId +'-hs" class="next-hs"></div>';
					}
				};
				
				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.buttons == 'style3' || options.buttons == 'style4') {
				
				if (options.buttons == 'style3') {
					showcontrols = setTimeout(function(){
						sliderArrows('hideNext');
						sliderArrows('hidePrev');
					},options.pause);
				}
				
				$("#"+options.nextId+'-hs')
					.mouseenter(function() {						
						sliderArrows('showNext');
					})
					.mouseleave(function() {
						sliderArrows('hideNext');
					})
					.click(function(){		
						animate("next",true);					
					});			
					
				$("#"+options.prevId+'-hs')
					.mouseenter(function() {
						sliderArrows('showPrev');
					})
					.mouseleave(function() {
						sliderArrows('hidePrev');
					})
					.click(function(){		
						animate("prev",true);
					});
					
			} else if (options.buttons == 'style5') {
				$("#"+options.nextId+'-hs')					
					.click(function(){		
						animate("next",true);					
					});			
					
				$("#"+options.prevId+'-hs')
					.click(function(){		
						animate("prev",true);
					});
			
			} else {
				$("#"+options.nextId).click(function(){		
					animate("next",true);					
				});
				$("#"+options.prevId).click(function(){		
					animate("prev",true);				
				});
			  }			  
				
				$("a","#"+options.firstId).click(function(){		
					animate("first",true);
				});				
				$("a","#"+options.lastId).click(function(){		
					animate("last",true);				
				});				
			};
			
			function sliderArrows(action){
				switch(action){
					case "showNext":
						$("#"+options.nextId).show();
						$("#"+options.nextId+'-arrow').show();	
						break;
					case "hideNext":
						$("#"+options.nextId).hide();
						$("#"+options.nextId+'-arrow').hide();		
						break;
					case "showPrev":
						$("#"+options.prevId).show();
						$("#"+options.prevId+'-arrow').show();		
						break;
					case "hidePrev":
						$("#"+options.prevId).hide();
						$("#"+options.prevId+'-arrow').hide();		
						break;
				}
			}
			
			function setCurrent(i){
				i = parseInt(i)+1;
				$("li", "#" + options.numericId).removeClass("current");
				$("li#" + options.numericId + i).addClass("current");
				curSlide = nextSlide = $("ul li", obj).eq(i);				
			};
			
			function adjust(){
				if(t>ts) t=0;		
				if(t<0) t=ts;
				if (options.animation == 'fade') {
					$("ul",obj).css("margin-left",(t*w*-1));					 
				} else 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 && options.animation != 'fade') setCurrent(t);				
			};
			
			var curSlide;
			
			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.animation == 'fade') {
						p = (t*w*-1);						

						$("ul li", obj).css("opacity",1);
						$(".tmpslide",obj).remove();
						nextSlide = $("ul li", obj).eq(parseInt(t)+1);
						if (options.numeric) { if (!curSlide) curSlide = $("ul li", obj).eq(1); }
						else if (t == -1) { curSlide = $("ul li", obj).eq(1); }
						else { curSlide = $("ul li", obj).eq(t); }
						$("ul", obj).parent().append("<div class='tmpslide' style='position:absolute;top:0;left:0;overflow:hidden;height:"+h+"px;width:"+w+"px;'></div>");
						$(".tmpslide").css("opacity",0);						
						$(".tmpslide").html( nextSlide.html() );
						$(".tmpslide").animate({"opacity":1}, options.speed);						
						
						curSlide.animate({opacity:0},options.speed, function() {							
							$("ul",obj).animate({ marginLeft: p }, { queue:true, duration:0, complete:adjust });							
						});
						
						if(options.numeric) {
							var tf = t;
							if(t>ts) tf=0;		
							if(t<0) tf=ts;
							setCurrent(tf);							
						}
						
						
					} else {						
						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);