/* - ++resource++easySlider.js - */

(function($) {

	$.fn.easySlider = function(options){

		var defaults = {			
			prevId: 		'prevBtn',
			nextId: 		'nextBtn',	
			firstId: 		'firstBtn',
			lastId: 		'lastBtn',	
			vertical:		false,
			speed: 			800,
			auto:			false,
			pause:			2000,
			continuous:		false,
			goToButtonId:   'goToButton',
			goToRotateAmount:8,
			effect: 'Slide',
			navigation_type: 'Navigation Buttons',
			fadeNavigation:  false
		}; 
		
		var options = $.extend(defaults, options);  
				
		this.each(function() {  
			var obj = $(this); 
			var slide = $("li.slide", obj);
			var s = slide.length;
			var w = slide.width(); 
			var h = slide.height(); 
			var timeout;
			var timer_activated = options.auto; 
			obj.css("overflow","hidden");
			var ts = s-1;
			var t = 0;
			
			$("ul.slider-list", obj).css('width',s*w);			
			if(!options.vertical) $("li.slide", obj).css('float','left');
			
			//Navigation...
			if(options.navigation_type != "No Buttons"){
				var html = '';
				if(options.navigation_type == "Navigation Buttons"){
          html += "<div id='easySlider-goToButtons'>";
					html += ' <span id="leftb"><a class="leftright" href=\"javascript:void(0);\">&nbsp</a></span>';
          for(var i=0; i < ts+1; i++){ 
            html += "<a id=\"" + options.goToButtonId + i + "\" href=\"javascript:void(0);\">" + (i+1) + "</a> ";
          }
					html += ' <span id="rightb"><a class="leftright" href=\"javascript:void(0);\">&nbsp</a></span>';
					html += '<div id="pauseplay"></div>';
          html += "</div>";
				}
				if(options.navigation_type == "Big Arrows"){
          html += ' <span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">&nbsp</a></span>';
          html += ' <span id="'+ options.nextId +'"><a href=\"javascript:void(0);\">&nbsp</a></span>';
        }else if(options.navigation_type == "Small Arrows"){
          html += "<div id='smallButtons'>";
          html += ' <span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">&nbsp</a></span>';
          html += ' <span id="'+ options.nextId +'"><a href=\"javascript:void(0);\">&nbsp</a></span>';
          html += "</div>";
        }
				$(obj).after(html);										
			};
      //end nav
	        
			$("a","#"+options.nextId).click(function(){		
				animate("next",true);
			});
			$("a","#"+options.prevId).click(function(){		
				animate("prev",true);				
			});	
			$("span#leftb a").click(function(){		
				animate("prev",true);				
			});
			$("span#rightb a").click(function(){		
				animate("next",true);				
			});
			$("a","#"+options.firstId).click(function(){		
				animate("first",true);
			});				
			$("a","#"+options.lastId).click(function(){		
				animate("last",true);				
			});	
			$("div#easySlider-goToButtons a:not(.leftright)").click(function(){
        animate(parseInt($(this).attr('id').substring(options.goToButtonId.length)), true);
			});
			
			if(options.navigation_type == "Navigation Buttons"){
			  $("#" + options.goToButtonId + "0").addClass('active');
			}
			
			function update_goToButtons(btns){
        if(btns.size() > options.goToRotateAmount){
          var min = Math.max(t - Math.floor(options.goToRotateAmount/2), 0);
          var max = Math.min(t + Math.floor(options.goToRotateAmount/2), btns.size());
          var diff = max - min;
          if(diff != options.goToRotateAmount){
            min = Math.max(min - (options.goToRotateAmount - diff), 0);
          }
          diff = max - min;
          if(diff != options.goToRotateAmount){
            max = Math.min(max + (options.goToRotateAmount - diff), btns.size());
          }
          for(var i = 0; i < min; i++){
            $("#" + options.goToButtonId + i).hide();
          }
          for(var i = min; i < max; i++){
            $("#" + options.goToButtonId + i).show();
          }
          for(var i = max; i < btns.size(); i++){
            $("#" + options.goToButtonId + i).hide();
          }
        }
			}
			
			update_goToButtons($("div#easySlider-goToButtons a:not(.leftright)"));
			
			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:
            if(typeof(dir) == "number"){
              t = dir;
            }
						break; 
				};	
				
				if(options.navigation_type == "Navigation Buttons"){
          var btns = $("div#easySlider-goToButtons a:not(.leftright)");
          btns.removeClass("active");
          $("#" + options.goToButtonId + t).addClass('active');
          update_goToButtons(btns);
				}
				
				var diff = Math.abs(ot-t);
				//var speed = diff*options.speed; //don't like this... too slow for lots of slides
				var position = (t*w*-1);
				if(options.vertical){
          position = (t*h*-1);
				}
				
				if(diff != 0){//Only run it if it's moving to another slide.
  				if(options.effect == "Slide"){
            var speed = (diff*options.speed)/diff;
            if(!options.vertical) {
              $("ul.slider-list",obj).animate({ 
                  marginLeft: position
              }, speed);				
            } else {
              p = (t*h*-1);
              $("ul.slider-list",obj).animate({ 
                marginTop: position 
              }, speed);					
      			};
  				}else if(options.effect == "Fade"){
  			    var margin = "marginLeft";
  			    if(options.vertical){ 
  			      margin = "marginTop"; 
  			    }

            $("ul.slider-list", obj).fadeOut(Math.ceil(options.speed/2), function(){
              $(this).css(margin, position).fadeIn(Math.ceil(options.speed/2));
            });
  				}
				}
				
				if(!options.continuous){					
					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){ 
				  clear_timer(); 
				}
				if(timer_activated && dir=="next" && !clicked){
          set_timer(diff*options.speed+options.pause);
				};
			};
			
			function set_timer(duration){
        timeout = setTimeout(function(){
					animate("next",false);
				}, duration);
				timer_activated = true;
				$('div#pauseplay').addClass('pause').removeClass('play');
			}
			
			function clear_timer(){
        clearTimeout(timeout);
        timer_activated = false;
        $('div#pauseplay').addClass('play').removeClass('pause');
			}

      if(options.fadeNavigation){
        var selector = "div#smallButtons,div#easySlider-goToButtons,#" + options.prevId + ",#" + options.nextId;
        $("div#slider-container").hover(function(){
          $(selector).fadeIn('fast');
        }, function(){
          $(selector).fadeOut();
        });
			}

      $('div#pauseplay').click(function(){
        if(timer_activated){
          clear_timer();
        }else{
          set_timer(options.pause);
        }
			});
    			
			// init
			if(timer_activated){
        set_timer(options.pause);
        $('div#pauseplay').addClass('pause');
			}else{
        $('div#pauseplay').addClass('play');
			}
			
			if(!options.continuous){					
				$("a","#"+options.prevId).hide();
				$("a","#"+options.firstId).hide();				
			}
		});
	}
})(jQuery);