/*
 * 	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>
 *
 */

(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
		}; 
		
		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", 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;						
				$('#page-header').before(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 copy = obj.find('.copy');

            copy.fadeOut('fast');

            var ot = t;				
            switch(dir){
               case "next":
                  t = (ot>=ts) ? (options.continuous ? 0 : ts) : t+1;						
                  break; 
               case "prev":
                  t = (t<=0) ? (options.continuous ? ts : 0) : t-1;
                  break; 
               case "first":
                  t = 0;
                  break; 
               case "last":
                  t = ts;
                  break; 
               default:
                  break; 
            };	
            
            var diff = Math.abs(ot-t);
            var speed = diff*options.speed;						
            if(!options.vertical) {
               p = (t*w*-1);
               $("ul",obj).animate(
                  { marginLeft: p }, 
                  speed, function() {
                     copy.fadeIn()
                  }
               );				
            } else {
               p = (t*h*-1);
               $("ul",obj).animate(
                  { marginTop: p }, 
                  speed, function() {
                     copy.fadeIn()
                  }
               );					
            };
            
            if(options.controlsFade){					
               if(t==ts){
                  $("a","#"+options.nextId).fadeOut();
                  $("a","#"+options.lastId).fadeOut();
               } else {
                  $("a","#"+options.nextId).fadeIn();
                  $("a","#"+options.lastId).fadeIn();					
               };
               if(t==0){
                  $("a","#"+options.prevId).fadeOut();
                  $("a","#"+options.firstId).fadeOut();
               } else {
                  $("a","#"+options.prevId).fadeIn();
                  $("a","#"+options.firstId).fadeIn();
               };					
            };				
            
            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.controlsFade){
				$("a","#"+options.prevId).fadeOut();
				$("a","#"+options.firstId).fadeOut();				
			};				
			
		});
	  
	};

})(jQuery);