/*
 * 	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);  
				
    this.each(function() {  
      var obj = $(this); 				
      var s = $("li", obj).length;
      var w = 920; //$("li", obj).width(); 
      var h = 300; //$("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 += '<ol id="'+ options.numericId +'"></ol>';
        }
        if (1==1) {
          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++){						
          $(document.createElement("li"))
          .attr('id',options.numericId + (i+1))
          .html('<a rel='+ i +' href=\"javascript:void(0);\">&nbsp;</a>')
          .appendTo($("#"+ options.numericId))
          .click(function(){							
            animate($("a",$(this)).attr('rel'),true);
          }); 												
        };							
      }
      if (1==1) {
        $("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;
          t = parseInt(t);
          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 = parseInt(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);
          };
			
        };
				
      };
      // 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);