/*
 * 	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
 *
 *  Modified for Pixelmack.com by Dan Criel - dancriel@gmail.com
 *  July 2010
 *
 */
 
/*
 *	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 pad(number, length) {
	//http://www.electrictoolbox.com/pad-number-zeroes-javascript/
	var str = '' + number;
	while (str.length < length) {
		str = '0' + str;
	}
	return str;
}

/*
 * jQuery shuffle
 *
 * Copyright (c) 2008 Ca-Phun Ung <caphun at yelotofu dot com>
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://yelotofu.com/labs/jquery/snippets/shuffle/
 *
 * Shuffles an array or the children of a element container.
 * This uses the Fisher-Yates shuffle algorithm <http://jsfromhell.com/array/shuffle [v1.0]>
 */
 
(function($){

	$.fn.shuffle = function() {
		return this.each(function(){
			var items = $(this).children().clone(true);
			return (items.length) ? $(this).html($.shuffle(items)) : this;
		});
	}
	
	$.shuffle = function(arr) {
		for(var j, x, i = arr.length; i; j = parseInt(Math.random() * i), x = arr[--i], arr[i] = arr[j], arr[j] = x);
		return arr;
	}
	
})(jQuery);


(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',
			hoverPause:		false,
			randomize:		false
		}; 
		
		var timeLeft = 0;
		var timeStarted = new Date();
		var pauseTimer;
		
		var options = $.extend(defaults, options);  
		
		if (options.randomize) {
			// shuffle the list elements
			$(this).children("ul").shuffle();
		}
				
		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);	
			
			var numeric_labels = new Array();
			var i = 0;
			$("#slider ul").find("img").each(function() {
				numeric_labels[i] = $(this).attr("alt");
				i++;
			});
			
			
			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;	
				// only show numeric controls if there is more than 1 slide			
				if(options.numeric && ts>0){
					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);										
			};
			
			// only show numeric controls if there is more than 1 slide
			if(options.numeric && ts>0){									
				for(var i=0;i<s;i++){
				
					// label = numbers
					var li_label = pad( (i+1), 2 );
					
					// override numbers if alt specified
					var numeric_label_char_limit = 999;
					if (numeric_labels[i].length > 0) {
						li_label = numeric_labels[i];
						if (li_label.length > numeric_label_char_limit) {
							li_label = li_label.substring(0,numeric_label_char_limit)+"...";
						}
					}
					
					$(document.createElement("li"))
						.attr('id',options.numericId + (i+1))
						.html('<a rel='+ i +' href=\"javascript:void(0);\">'+ li_label +'</a>')
						.appendTo($("#"+ 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,hurry){
				if (!hurry) hurry = false;
				if (clickable){
					clickable = false;
					var ot = t;				
					switch(dir){
						case "next":
							t = (ot>=ts) ? (options.continuous ? parseInt(t)+1 : ts) : parseInt(t)+1;						
							break; 
						case "prev":
							t = (t<=0) ? (options.continuous ? parseInt(t)-1 : 0) : parseInt(t)-1;
							break; 
						case "first":
							t = 0;
							break; 
						case "last":
							t = ts;
							break; 
						default:
							t = dir;
							break; 
					};
					
					//if(t>ts) t=0; roll back to the start instead of looping
					
					var diff = Math.abs(ot-t);
					//var speed = diff*options.speed;
					
					if (hurry) {
						var speed = 0;
					} else {
						var speed = options.speed;
					}
									
					if(!options.vertical) {
						p = (t*w*-1);
						//alert("t="+t);
						$("ul",obj).animate(
							{ marginLeft: p }, 
							{ queue:false, duration:speed, complete:adjust, easing: 'easeInOutCubic' }
						);				
					} else {
						p = (t*h*-1);
						$("ul",obj).animate(
							{ marginTop: p }, 
							{ queue:false, duration:speed, complete:adjust, easing: 'easeInOutCubic' }
						);					
					};
					
					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);
						clearTimeout(pauseTimer);
						$('#slider').unbind('mouseleave');
					}
					if(options.auto && dir=="next" && !clicked){
						timeout = setTimeout(function(){
							animate("next",false);
						},diff*options.speed+options.pause);
						
						timeStarted = new Date();
					};
					
					// update hash value
					var hashValue = t;
					if (hashValue > ts) {
						hashValue = 0;
					}
					hashValue++; // slide 1 should be "#1" and not "#0"
					if (!options.randomize) {
						if (clicked || (!clicked && hashValue > 1)) {
							window.location.hash = "#"+hashValue;
						}
					} // don't add the hash if it's back to page 0, preserve browser history
					
				};
				
			};
			// 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();				
			};
			if(ts == 0) {
				$("a","#"+options.nextId).hide();
				$("a","#"+options.prevId).hide();
			}
					
			
			// hoverPause option added with help from comments at:
			// http://cssglobe.com/post/5780/easy-slider-17-numeric-navigation-jquery-slider
			if (options.hoverPause){
				$('#slider').mouseenter(function(){
					if (!options.auto) { return; }
					//animate("stop",true);
					clearTimeout(timeout);
					var now = new Date();
					if ( timeStarted > 0 ) {
						timeLeft = options.pause - ( now.getTime() - timeStarted.getTime() );
					}
					//alert(timeLeft + " left on the clock");
					
					// optional: show/hide a "pause" indicator
					/*
					var newIndicator = "<div id='slider-indicator'>paused</div>";
					$("#feature").prepend(newIndicator);
					*/
					
				});
				$('#slider').mouseleave(function(){
					if (!options.auto) { return; }
					if (options.continuous){
						clearTimeout(pauseTimer);
						pauseTimer = setTimeout(function() {
							animate("next",false);
						}, timeLeft);
					} else {
						animate("next",true);
					}
					
					/*
					if ($("#slider-indicator").length) {
						$("#slider-indicator").remove();
					}
					*/
					
				});
			};
			
			
			// get url hash and jump to slide if possible
			var hash = parseInt(window.location.hash.replace(/#/,''))-1; // subtract 1 to get slide index from hash reference
			if (hash <= ts && !options.randomize) {
				animate(hash,false,true);
			}
			
			// make sure back and forward buttons work
			// http://benalman.com/projects/jquery-bbq-plugin/
			$(window).bind( "hashchange", function(e) {
				var hash = parseInt(window.location.hash.replace(/#/,''))-1; // subtract 1 to get slide index from hash reference
				if (hash <= ts && !options.randomize) {
					animate(hash,false);
				}
				if (!hash || hash.length == 0) {
					animate(0,false)
				}
			});
			
		});
	  
	};

})(jQuery);