/*
 * 	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'
		}; 
		
		var options = $.extend(defaults, options);  

		//touch wipe
	        var config = {
	    		min_move_x: 20,
	    		//min_move_y: 20,
	 		wipeLeft: function() { },
	 		wipeRight: function() { },
	 		//wipeUp: function() { },
	 		//wipeDown: function() { },
			preventDefaultEvents: true
		 };

				
		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 += '<div id="colt"><ol id="'+ options.numericId +'"></ol></div>';
				} 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++){						
					$(document.createElement("li"))
						.attr('id',options.numericId + (i+1))
						.html('<a rel='+ i +' href=\"javascript:void(0);\">'+ (i+1) +'</a>')
						//.html('<a rel='+ i +' href=\"javascript:void(0);\"></a>')
						.appendTo($("#"+ 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;
					var speed = options.speed;												
					if(!options.vertical) {
						p = (t*w*-1);
						$(".main-con-txt").animate({opacity: 0},{queue:true,duration:speed*0.5});
						$("ul",obj).animate(
							{ marginLeft: p }, 
							{ queue:false, duration:speed, complete:adjust }
						);
						//$(".main-con-txt").fadeIn("slow");
						//$(".main-con-txt").animate({opacity: 1.0},{queue:true,duration:speed*0.75});
						
						if(jQuery.browser.msie) {
						$(".main-con-txt").animate({opacity: 1.0},{queue:true,duration:speed*1.8,complete:function() {this.style.removeAttribute('filter');}});
						//$("#id_name").fadeIn(450,function() {this.style.removeAttribute('filter');});
						}else{
						$(".main-con-txt").animate({opacity: 1.0},{queue:true,duration:speed*1.8});
						}
					} 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();				
			};				

			//touch wipe
		   	 var startX;
		    	 //var startY;
				 var isMoving = false;

		    	 function cancelTouch() {
		    		 this.removeEventListener('touchmove', onTouchMove);
		    		 startX = null;
		    		 isMoving = false;
		    	 }	
		    	 
		    	 function onTouchMove(e) {
		    		 if(config.preventDefaultEvents) {
		    			 e.preventDefault();
		    		 }
		    		 if(isMoving) {
			    		 var x = e.touches[0].pageX;
			    		 //var y = e.touches[0].pageY;
			    		 var dx = startX - x;
			    		 //var dy = startY - y;
			    		 if(Math.abs(dx) >= config.min_move_x) {
			    			cancelTouch();
			    			if(dx > 0) {
			    				config.wipeLeft();
			    				animate("next",true);
			    			}
			    			else {
			    				config.wipeRight();
			    				animate("prev",true);
			    			}
			    		 }
			    		 //else if(Math.abs(dy) >= config.min_move_y) {
				    			//cancelTouch();
				    			//if(dy > 0) {
				    			//	config.wipeDown();
				    			//}
				    			//else {
				    			//	config.wipeUp();
				    			//}
				    		 //}
		    		 }
		    	 }
		    	 
		    	 function onTouchStart(e)
		    	 {
		    		 if (e.touches.length == 1) {
		    			 startX = e.touches[0].pageX;
		    			 //startY = e.touches[0].pageY;
		    			 isMoving = true;
		    			 this.addEventListener('touchmove', onTouchMove, false);
		    		 }
		    	 }    	 
		    	 if ('ontouchstart' in document.documentElement) {
		    		 this.addEventListener('touchstart', onTouchStart, false);
		    	 }



		});
	  
	};



})(jQuery);