/*
 * 	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 += ' <p style="width: 500px; text-align: center; padding-top: 5px;"><span id="'+ options.prevId +'"><a href=\"javascript:void(0);\"><img src="images/agt_back-25.png"/>'+ options.prevText +'</a></span>';
        html += ' <span id="'+ options.nextId +'"><a href=\"javascript:void(0);\">'+ options.nextText +'<img src="images/agt_forward-25.png"/></a></span></p>';
        if(options.lastShow) html += ' <span id="'+ options.lastId +'"><a href=\"javascript:void(0);\">'+ options.lastText +'</a></span>';
        html += options.controlsAfter;
        $(obj).after(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 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
          );
        } else {
          p = (t*h*-1);
          $("ul",obj).animate(
          {
            marginTop: p
          },
          speed
          );
        };

        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.continuous && options.controlsFade){
        $("a","#"+options.prevId).hide();
        $("a","#"+options.firstId).hide();
      };

    });

  };

})(jQuery);