/*
 * 	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 = {
      esCallback: function(thet, thets){},
      prevId: 			'slide-left',
      prevText: 		'Prev',
      nextId: 			'slide-right',
      nextText: 		'Next',
      controlsShow:		true,
      controlsBefore:	'',
      controlsAfter:	'',
      controlsFade:		false,
      firstId: 			'firstBtn',
      firstText: 		'First',
      firstShow:		false,
      lastId: 			'lastBtn',
      lastText: 		'Last',
      lastShow:			false,
      vertical:			false,
      speed: 			300,
      auto:				false,
      pause:			2000,
      continuous:		true,
      numeric: 			true,
      numericId: 		'controls'
    };
		
    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.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(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);
          });
        };
      }
      {
        $("a","#"+options.nextId).click(function(){
          animate("next",true);
          options.esCallback(obj.find('ul li:eq('+t+')').attr('rel'));
        });
        $("a","#"+options.prevId).click(function(){
          animate("prev",true);
          options.esCallback(obj.find('ul li:eq('+t+')').attr('rel'));
        });
        $("a","#"+options.firstId).click(function(){
          animate("first",true);
          options.esCallback(obj.find('ul li:eq('+t+')').attr('rel'));
        });
        $("a","#"+options.lastId).click(function(){
          animate("last",true);
          options.esCallback(obj.find('ul li:eq('+t+')').attr('rel'));
        });
      };
			
      function setCurrent(i){
        i = parseInt(i)+1;
        $("li", "#" + options.numericId).removeClass("current");
        $("li#" + options.numericId + i).addClass("current");
        $("#slides li").removeClass("current");
        $("#slides li:eq(" + i + ")").addClass("current");
        $(".current span.text").dequeue().animate({
			opacity: 1
		}, 300);
      };
			
      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-top",(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 = 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);