if (!Control) var Control = { };
Control.Slider = Class.create({
  initialize: function(handle, track, options) {
    var slider = this;
    
    if (Object.isArray(handle)) {
      this.handles = handle.collect( function(e) { return $(e) });
    } else {
      this.handles = [$(handle)];
    }
    
    this.track   = $(track);
    this.options = options || { };

    this.axis      = this.options.axis || 'horizontal';
    this.increment = this.options.increment || 1;
    this.step      = parseInt(this.options.step || '1');
    this.range     = this.options.range || $R(0,1);
    
    this.value     = 0; // assure backwards compat
    this.values    = this.handles.map( function() { return 0 });
    this.spans     = this.options.spans ? this.options.spans.map(function(s){ return $(s) }) : false;
    this.options.startSpan = $(this.options.startSpan || null);
    this.options.endSpan   = $(this.options.endSpan || null);

    this.restricted = this.options.restricted || false;

    this.maximum   = this.options.maximum || this.range.end;
    this.minimum   = this.options.minimum || this.range.start;

    // Will be used to align the handle onto the track, if necessary
    this.alignX = parseInt(this.options.alignX || '0');
    this.alignY = parseInt(this.options.alignY || '0');
    
    this.trackLength = this.maximumOffset() - this.minimumOffset();

    this.handleLength = this.isVertical() ? 
      (this.handles[0].offsetHeight != 0 ? 
        this.handles[0].offsetHeight : this.handles[0].style.height.replace(/px$/,"")) : 
      (this.handles[0].offsetWidth != 0 ? this.handles[0].offsetWidth : 
        this.handles[0].style.width.replace(/px$/,""));

    this.active   = false;
    this.dragging = false;
    this.disabled = false;

    if (this.options.disabled) this.setDisabled();

    // Allowed values array
    this.allowedValues = this.options.values ? this.options.values.sortBy(Prototype.K) : false;
    if (this.allowedValues) {
      this.minimum = this.allowedValues.min();
      this.maximum = this.allowedValues.max();
    }

    this.eventMouseDown = this.startDrag.bindAsEventListener(this);
    this.eventMouseUp   = this.endDrag.bindAsEventListener(this);
    this.eventMouseMove = this.update.bindAsEventListener(this);

    // Initialize handles in reverse (make sure first handle is active)
    this.handles.each( function(h,i) {
      i = slider.handles.length-1-i;
      slider.setValue(parseFloat(
        (Object.isArray(slider.options.sliderValue) ? 
          slider.options.sliderValue[i] : slider.options.sliderValue) || 
         slider.range.start), i);
      h.makePositioned().observe("mousedown", slider.eventMouseDown);
    });
    
    this.track.observe("mousedown", this.eventMouseDown);
    document.observe("mouseup", this.eventMouseUp);
    document.observe("mousemove", this.eventMouseMove);
    
    this.initialized = true;
  },
  dispose: function() {
    var slider = this;    
    Event.stopObserving(this.track, "mousedown", this.eventMouseDown);
    Event.stopObserving(document, "mouseup", this.eventMouseUp);
    Event.stopObserving(document, "mousemove", this.eventMouseMove);
    this.handles.each( function(h) {
      Event.stopObserving(h, "mousedown", slider.eventMouseDown);
    });
  },
  setDisabled: function(){
    this.disabled = true;
  },
  setEnabled: function(){
    this.disabled = false;
  },  
  getNearestValue: function(value){
    if (this.allowedValues){
      if (value >= this.allowedValues.max()) return(this.allowedValues.max());
      if (value <= this.allowedValues.min()) return(this.allowedValues.min());
      
      var offset = Math.abs(this.allowedValues[0] - value);
      var newValue = this.allowedValues[0];
      this.allowedValues.each( function(v) {
        var currentOffset = Math.abs(v - value);
        if (currentOffset <= offset){
          newValue = v;
          offset = currentOffset;
        } 
      });
      return newValue;
    }
    if (value > this.range.end) return this.range.end;
    if (value < this.range.start) return this.range.start;
    return value;
  },
  setValue: function(sliderValue, handleIdx){
    if (!this.active) {
      this.activeHandleIdx = handleIdx || 0;
      this.activeHandle    = this.handles[this.activeHandleIdx];
      this.updateStyles();
    }
    handleIdx = handleIdx || this.activeHandleIdx || 0;
    if (this.initialized && this.restricted) {
      if ((handleIdx>0) && (sliderValue<this.values[handleIdx-1]))
        sliderValue = this.values[handleIdx-1];
      if ((handleIdx < (this.handles.length-1)) && (sliderValue>this.values[handleIdx+1]))
        sliderValue = this.values[handleIdx+1];
    }
    sliderValue = this.getNearestValue(sliderValue);
    this.values[handleIdx] = sliderValue;
    this.value = this.values[0]; // assure backwards compat
    
    this.handles[handleIdx].style[this.isVertical() ? 'top' : 'left'] = 
      this.translateToPx(sliderValue);
    
    this.drawSpans();
    if (!this.dragging || !this.event) this.updateFinished();
  },
  setValueBy: function(delta, handleIdx) {
    this.setValue(this.values[handleIdx || this.activeHandleIdx || 0] + delta, 
      handleIdx || this.activeHandleIdx || 0);
  },
  translateToPx: function(value) {
    return Math.round(
      ((this.trackLength-this.handleLength)/(this.range.end-this.range.start)) * 
      (value - this.range.start)) + "px";
  },
  translateToValue: function(offset) {
    return ((offset/(this.trackLength-this.handleLength) * 
      (this.range.end-this.range.start)) + this.range.start);
  },
  getRange: function(range) {
    var v = this.values.sortBy(Prototype.K); 
    range = range || 0;
    return $R(v[range],v[range+1]);
  },
  minimumOffset: function(){
    return(this.isVertical() ? this.alignY : this.alignX);
  },
  maximumOffset: function(){
    return(this.isVertical() ? 
      (this.track.offsetHeight != 0 ? this.track.offsetHeight :
        this.track.style.height.replace(/px$/,"")) - this.alignY : 
      (this.track.offsetWidth != 0 ? this.track.offsetWidth : 
        this.track.style.width.replace(/px$/,"")) - this.alignX);
  },  
  isVertical:  function(){
    return (this.axis == 'vertical');
  },
  drawSpans: function() {
    var slider = this;
    if (this.spans)
      $R(0, this.spans.length-1).each(function(r) { slider.setSpan(slider.spans[r], slider.getRange(r)) });
    if (this.options.startSpan)
      this.setSpan(this.options.startSpan,
        $R(0, this.values.length>1 ? this.getRange(0).min() : this.value ));
    if (this.options.endSpan)
      this.setSpan(this.options.endSpan, 
        $R(this.values.length>1 ? this.getRange(this.spans.length-1).max() : this.value, this.maximum));
  },
  setSpan: function(span, range) {
    if (this.isVertical()) {
      span.style.top = this.translateToPx(range.start);
      span.style.height = this.translateToPx(range.end - range.start + this.range.start);
    } else {
      span.style.left = this.translateToPx(range.start);
      span.style.width = this.translateToPx(range.end - range.start + this.range.start);
    }
  },
  updateStyles: function() {
    this.handles.each( function(h){ Element.removeClassName(h, 'selected') });
    Element.addClassName(this.activeHandle, 'selected');
  },
  startDrag: function(event) {
    if (Event.isLeftClick(event)) {
      if (!this.disabled){
        this.active = true;
        
        var handle = Event.element(event);
        var pointer  = [Event.pointerX(event), Event.pointerY(event)];
        var track = handle;
        if (track==this.track) {
          var offsets  = Position.cumulativeOffset(this.track); 
          this.event = event;
          this.setValue(this.translateToValue( 
           (this.isVertical() ? pointer[1]-offsets[1] : pointer[0]-offsets[0])-(this.handleLength/2)
          ));
          var offsets  = Position.cumulativeOffset(this.activeHandle);
          this.offsetX = (pointer[0] - offsets[0]);
          this.offsetY = (pointer[1] - offsets[1]);
        } else {
          // find the handle (prevents issues with Safari)
          while((this.handles.indexOf(handle) == -1) && handle.parentNode) 
            handle = handle.parentNode;
            
          if (this.handles.indexOf(handle)!=-1) {
            this.activeHandle    = handle;
            this.activeHandleIdx = this.handles.indexOf(this.activeHandle);
            this.updateStyles();
            
            var offsets  = Position.cumulativeOffset(this.activeHandle);
            this.offsetX = (pointer[0] - offsets[0]);
            this.offsetY = (pointer[1] - offsets[1]);
          }
        }
      }
      Event.stop(event);
    }
  },
  update: function(event) {
   if (this.active) {
      if (!this.dragging) this.dragging = true;
      this.draw(event);
      if (Prototype.Browser.WebKit) window.scrollBy(0,0);
      Event.stop(event);
   }
  },
  draw: function(event) {
    var pointer = [Event.pointerX(event), Event.pointerY(event)];
    var offsets = Position.cumulativeOffset(this.track);
    pointer[0] -= this.offsetX + offsets[0];
    pointer[1] -= this.offsetY + offsets[1];
    this.event = event;
    this.setValue(this.translateToValue( this.isVertical() ? pointer[1] : pointer[0] ));
    if (this.initialized && this.options.onSlide)
      this.options.onSlide(this.values.length>1 ? this.values : this.value, this);
  },
  endDrag: function(event) {
    if (this.active && this.dragging) {
      this.finishDrag(event, true);
      Event.stop(event);
    }
    this.active = false;
    this.dragging = false;
  },  
  finishDrag: function(event, success) {
    this.active = false;
    this.dragging = false;
    this.updateFinished();
  },
  updateFinished: function() {
    if (this.initialized && this.options.onChange) 
      this.options.onChange(this.values.length>1 ? this.values : this.value, this);
    this.event = null;
  }
});
if (typeof(AC) === "undefined") { AC = {}; }
AC.ProductBrowser = {
	productSlider: null,
	sliderVal: 0,
	animationId: false,
	viewportWidth: 946,
	contentWidth: 946,
	isSliding: false,
	lastX: 0.32,
	isMouseDown: false,
	dif: 0,
	overlap: 0,
	offsetImageWidth: 127,
	sliderOffset: 291,
	offsetContentWidth: -946,
	clicked: false,
	startIndex: 0,
	
	isIpScroll: false,
	hasIpDragged: false,
	init: function(setupArgs) {
		if (typeof(setupArgs.categories) != 'undefined') this.categories = setupArgs.categories;
		if (typeof(setupArgs.imageOverlap) != 'undefined') this.overlap = setupArgs.imageOverlap;
		if (typeof(setupArgs.sliderCentering) != 'undefined') this.sliderOffset = setupArgs.sliderCentering;
		if (typeof(setupArgs.initialCategory) != 'undefined') this.startIndex = setupArgs.initialCategory;
		if (typeof(setupArgs.arrowScrollAmount) != 'undefined') this.arrowScrollAmount = setupArgs.arrowScrollAmount;
		if (typeof(setupArgs.iPhoneCategories) != 'undefined') { this.iPhoneCategories = setupArgs.iPhoneCategories; } 
		
		$('iPodBarDI').style.visibility = "visible";
		$('blackproducts').style.overflow = "hidden";
		
		this.viewportWidth = $('blackproducts').getWidth();
		this.offsetImageWidth = $$('#iPodBar .iPod-barproducts')[0].getWidth()-this.overlap;
		this.contentWidth = this.offsetImageWidth * $$('#iPodBar .iPod-barproducts').length;
		this.offsetContentWidth = -1 * (this.contentWidth - this.viewportWidth);
		
		this.productSlider = new Control.Slider('iPod-products', 'iPodBarDI', {
				axis:'horizontal' 
		});
		
		
		AC.ProductBrowser.animateSlide(this.categories[this.startIndex].offset); // initial slide
		
		// Slider callbacks
		this.productSlider.options.onChange = function(value) {
			$('iPodBarimage').style.left = $('iPod-products').style.left;
			
			if (AC.ProductBrowser.isThrow && ! AC.ProductBrowser.isSliding) {
				AC.ProductBrowser.isSliding = true;
				AC.ProductBrowser.isThrow = false;
				
				var mod = value + AC.ProductBrowser.throwMod;
				if (mod < 0) mod = 0;

				if (mod > 1) mod = 1;
				AC.ProductBrowser.animateSlide(mod);
			}
			else if (! AC.ProductBrowser.isSliding && value){
				AC.ProductBrowser.isSliding = true;
				AC.ProductBrowser.animateSlide(value);
			}	
		};

		this.productSlider.options.onSlide = function(value) {		 
			$('iPodBarimage').style.left = $('iPod-products').style.left;
			if (value && ! AC.ProductBrowser.isSliding) {
				AC.ProductBrowser.isSliding = true;
				AC.ProductBrowser.isThrow = false;
				if (AC.ProductBrowser.isMouseDown) {
					AC.ProductBrowser.dif = value - AC.ProductBrowser.lastX;
					AC.ProductBrowser.lastX = value;	
					
					// check for throw, the dif thresholds will affect how easily the throw happens
					if(AC.ProductBrowser.dif > 0.05) {
						AC.ProductBrowser.isThrow = true;
						AC.ProductBrowser.throwMod = 0.2;
					}
					else if (AC.ProductBrowser.dif < -0.04) {
						AC.ProductBrowser.isThrow = true;
						AC.ProductBrowser.throwMod = -0.2;
					}
				}
		
				var w = AC.ProductBrowser.offsetContentWidth;
				$('iPodBar').style.left = w * value + "px";
				
				this.sliderVal = value;
				AC.ProductBrowser.lastX = value;
				AC.ProductBrowser.colorCats();		
				AC.ProductBrowser.isSliding = false; // reset
			}
			
			Element.setStyle($('blackproducts'), { overflow: "hidden"} );
		};
		
		Event.observe('iPodBarDI', 'mousedown', function(e) {
			var o = e.offsetX || e.layerX;
			if (Event.element(e).id =='iPodBarDI' && o < 100) AC.ProductBrowser.animateSlide(0);
		});
		Event.observe('leftarrow', 'mousedown', function() {
			AC.ProductBrowser.left();
		});
		Event.observe('rightarrow', 'mousedown', function() {
			AC.ProductBrowser.right();
		});
	
		AC.ProductBrowser.categories.each(function(c) {
			Event.observe($(c.id), 'mouseup', function(e) {
				AC.ProductBrowser.animateSlide(c.offset);
			});
		});			
	},
	
	animateSlide: function(toX) {
		// make sure toX is sane:
		if (toX > 1) toX = 1;
		if (toX < 0) toX = 0;
		AC.ProductBrowser.sliderVal = toX;
		window.clearInterval(AC.ProductBrowser.animationId); // kill any running animation
		var w = AC.ProductBrowser.offsetContentWidth;
		var stopPoint = w * toX;
		//stopPoint = Math.round(stopPoint / AC.ProductBrowser.offsetImageWidth) * AC.ProductBrowser.offsetImageWidth;
		var sliderStopPoint = (Math.round(AC.ProductBrowser.viewportWidth - AC.ProductBrowser.sliderOffset) * toX);
		
		AC.ProductBrowser.isSliding = true;
		AC.ProductBrowser.animationId = window.setInterval(function() {
			var sliderPos = parseInt($('iPodBar').getStyle('left')) || 0;
			var handlePos = parseInt($('iPod-products').getStyle('left')) || 0;
			var x = AC.ProductBrowser.calculateDecel(sliderPos, stopPoint);
			var sx = AC.ProductBrowser.calculateDecel(handlePos, sliderStopPoint); 
			$('iPodBar').style.left = x + "px";
			$('iPod-products').style.left = sx + "px";
			$('iPodBarimage').style.left = sx + "px";		
			AC.ProductBrowser.colorCats();
		
			if (x == stopPoint) {
				window.clearInterval(AC.ProductBrowser.animationId);
				AC.ProductBrowser.isSliding = false;			
			}
		}, 30);
		
	},
	
	colorCats: function() {
		var sliderX = parseInt($('iPod-products').getStyle('left')) + (($('iPod-products').getWidth()-20)/2);
		AC.ProductBrowser.categories.each(function(c) {
			var left = parseInt($(c.id).getStyle('left')) 
		 	var clr = Math.ceil((Math.min(sliderX,left) / Math.max(sliderX,left))*10);
		 	$(c.id).className = 'pb-catclass'+clr;
		});
	},
	
	left: function() {
		AC.ProductBrowser.animateSlide(AC.ProductBrowser.sliderVal - AC.ProductBrowser.arrowScrollAmount);
	},
	
	right: function() {
		AC.ProductBrowser.animateSlide(AC.ProductBrowser.sliderVal + AC.ProductBrowser.arrowScrollAmount);
	},
	
	calculateDecel: function(from, to) {
		var n = from - Math.floor( (from - to) * .4);
		if (Math.abs(from - to) < 4) return to;
		else return n;
	}
};