/*
 *  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;
    $(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);

$(document).ready(function(){
	$("#slider").easySlider({
		auto: true,
		continuous: true,
		pause: 3500
	});
});