/**
 * Custom button state handler for enabling/disabling button state. 
 * Called when the carousel has determined that the previous button
 * state should be changed.
 * Specified to the carousel as the configuration
 * parameter: prevButtonStateHandler
 **/
var handlePrevButtonState = function(type, args) {

	var enabling = args[0];
	var leftImage = args[1];
	if(enabling) {
		leftImage.src = "images/left-enabled.gif";	
	} else {
		leftImage.src = "images/left-disabled.gif";	
	}
	
};

/**
 * Custom button state handler for enabling/disabling button state. 
 * Called when the carousel has determined that the next button
 * state should be changed.
 * Specified to the carousel as the configuration
 * parameter: nextButtonStateHandler
 **/
var handleNextButtonState = function(type, args) {

	var enabling = args[0];
	var rightImage = args[1];
	
	if(enabling) {
		rightImage.src = "images/right-enabled.gif";
	} else {
		rightImage.src = "images/right-disabled.gif";
	}
	
};


/**
 * You must create the carousel after the page is loaded since it is
 * dependent on an HTML element (in this case 'mycarousel'.) See the
 * HTML code below.
 **/
var carousel; // for ease of debugging; globals generally not a good idea
var pageLoad = function() 
{
	carousel = new YAHOO.extension.Carousel("mycarousel",
		{
			numVisible:        1,
			animationSpeed:    0.15,
			scrollInc:         1,
			navMargin:         0,
			prevElement:     "prev-arrow",
			nextElement:     "next-arrow",
			size:              3,
			prevButtonStateHandler:   handlePrevButtonState,
			nextButtonStateHandler:   handleNextButtonState
		}
	);
	
	/*carousel._scrollNextInc = function(inc, showAnimation) {
		var numVisible = this.cfg.getProperty("numVisible");
		var currStart = this._priorFirstVisible;
		var currEnd = this._priorLastVisible;
		var size = this.cfg.getProperty("size");

		var scrollExtent = this._calculateAllowableScrollExtent();
		
		if(this.cfg.getProperty("wrap") && currEnd == scrollExtent.end) {
			this.scrollTo(scrollExtent.start); // might need to check animation is on or not
			return;
		}

		// increment start by inc
		var newStart = currStart + inc;		
		var newEnd = newStart + numVisible - 1;

		// If we are past the end, adjust or wrap
		if(newEnd > scrollExtent.end) {
			newEnd = scrollExtent.end;
			newStart = newEnd - numVisible + 1;
		}

		inc = newStart - currStart;

		// at this point the following variables are set
		// inc... amount to increment by
		// newStart... the firstVisible item after the scroll
		// newEnd... the last item visible after the scroll

		this.cfg.setProperty("firstVisible", newStart, true);


		if(inc > 0) {
			if(this._isValidObj(this.cfg.getProperty("loadNextHandler"))) {
				var visibleExtent = this._calculateVisibleExtent(newStart, newEnd);
				var cacheStart = (currEnd+1) < visibleExtent.start ? (currEnd+1) : visibleExtent.start;						
				var alreadyCached = this._areAllItemsLoaded(cacheStart, visibleExtent.end);
				this._loadNextHandlerEvt.fire(visibleExtent.start, visibleExtent.end, alreadyCached);
			}

			if(showAnimation) {
	 			var nextParams = { points: { by: [this.scrollAmountPerInc*inc, 0] } };
	 			if(this.isVertical()) {
	 				nextParams = { points: { by: [0, -this.scrollAmountPerInc*inc] } };
	 			}

	 			this._scrollNextAnim = new YAHOO.util.Motion(this.carouselList, 
	 							nextParams, 
   								this.cfg.getProperty("animationSpeed"), 
								this.cfg.getProperty("animationMethod"));

// is this getting added multiple times?
				if(this.cfg.getProperty("animationCompleteHandler")) {
					this._scrollNextAnim.onComplete.subscribe(this._handleAnimationComplete, [this, "next"]);
				}
				this._scrollNextAnim.animate();
			} else {
				if(this.isVertical()) {
					var currY = YAHOO.util.Dom.getY(this.carouselList);

					YAHOO.util.Dom.setY(this.carouselList, 
								currY - this.scrollAmountPerInc*inc);
				} else {
					var currX = YAHOO.util.Dom.getX(this.carouselList);
					YAHOO.util.Dom.setX(this.carouselList, 
								currX + this.scrollAmountPerInc*inc);
				}
			}

		}
		this._priorFirstVisible = newStart;
		this._priorLastVisible = newEnd;	

		this._enableDisableControls();
		return false;
	}
	
	carousel._scrollPrevInc = function(dec, showAnimation) {
		var numVisible = this.cfg.getProperty("numVisible");
		var currStart = this._priorFirstVisible;
		var currEnd = this._priorLastVisible;
		var size = this.cfg.getProperty("size");

		// decrement start by dec
		var newStart = currStart - dec;	

		var scrollExtent = this._calculateAllowableScrollExtent();
	
		// How to decide whether to stop at 1 or not
		newStart = (newStart < scrollExtent.start) ? scrollExtent.start : newStart;
		
		// if we are going to extend past the end, then we need to correct the start
		var newEnd = newStart + numVisible - 1;
		if(newEnd > scrollExtent.end) {
			newEnd = scrollExtent.end;
			newStart = newEnd - numVisible + 1;
		}
				
		dec = currStart - newStart;

		// at this point the following variables are set
		// dec... amount to decrement by
		// newStart... the firstVisible item after the scroll
		// newEnd... the last item visible after the scroll
		this.cfg.setProperty("firstVisible", newStart, true);
				
		// if we are decrementing
		if(dec > 0) {			
			if(this._isValidObj(this.cfg.getProperty("loadPrevHandler"))) {	
				var visibleExtent = this._calculateVisibleExtent(newStart, newEnd);
				var cacheEnd = (currStart-1) > visibleExtent.end ? (currStart-1) : visibleExtent.end;						
				var alreadyCached = this._areAllItemsLoaded(visibleExtent.start, cacheEnd);
				
				this._loadPrevHandlerEvt.fire(visibleExtent.start, visibleExtent.end, alreadyCached);
			}

			if(showAnimation) {
	 			var prevParams = { points: { by: [-this.scrollAmountPerInc*dec, 0] } };
	 			if(this.isVertical()) {
	 				prevParams = { points: { by: [0, this.scrollAmountPerInc*dec] } };
	 			}
 		
	 			this._scrollPrevAnim = new YAHOO.util.Motion(this.carouselList,
	 							prevParams, 
   								this.cfg.getProperty("animationSpeed"), this.cfg.getProperty("animationMethod"));
				if(this.cfg.getProperty("animationCompleteHandler")) {
					this._scrollPrevAnim.onComplete.subscribe(this._handleAnimationComplete, [this, "prev"]);
				}
				this._scrollPrevAnim.animate();
			} else {
				if(this.isVertical()) {
					var currY = YAHOO.util.Dom.getY(this.carouselList);
					YAHOO.util.Dom.setY(this.carouselList, currY + 
							this.scrollAmountPerInc*dec);				
				} else {
					var currX = YAHOO.util.Dom.getX(this.carouselList);
					YAHOO.util.Dom.setX(this.carouselList, currX - 
							this.scrollAmountPerInc*dec);
				}
			}
		}
		this._priorFirstVisible = newStart;
		this._priorLastVisible = newEnd;	
		
		this._enableDisableControls();

		return false;
	}*/
	
	

};

/**
 * Custom button state handler for enabling/disabling button state. 
 * Called when the carousel has determined that the previous button
 * state should be changed.
 * Specified to the carousel as the configuration
 * parameter: prevButtonStateHandler
 **/
var handlePrevButtonState = function(type, args) {

    var enabling = args[0];
    var leftImage = args[1];
    if(enabling) {
        leftImage.style.visibility = "visible";    
    } else {
        leftImage.style.visibility = "hidden";        
    }
    
};

/**
 * Custom button state handler for enabling/disabling button state. 
 * Called when the carousel has determined that the next button
 * state should be changed.
 * Specified to the carousel as the configuration
 * parameter: nextButtonStateHandler
 **/
var handleNextButtonState = function(type, args) {

    var enabling = args[0];
    var rightImage = args[1];
    
    var womenRadio = YAHOO.util.Dom.get("Gender1Radio1");
    var menRadio = YAHOO.util.Dom.get("Gender1Radio2");
    
    
    var PerfumeStyleArray = YAHOO.util.Dom.getElementsByClassName("PerfumeStyle");    
    
    
    function isLegitTag(testedElement){
        if(testedElement.tagName)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    
    function ResetRadioButtons(){
        for(i=0;i< PerfumeStyleArray.length;i++){
            var itemsArray = YAHOO.util.Dom.getElementsBy(isLegitTag,'',PerfumeStyleArray[i]);
            itemsArray[0].checked = true;
            YAHOO.util.Dom.replaceClass(itemsArray[1],"radioOn","radioOff");
       }
    }
    
    if(womenRadio.checked){
                
              
               ResetRadioButtons();
                
               var itemsArray = YAHOO.util.Dom.getElementsBy(isLegitTag,'',PerfumeStyleArray[0]);
               itemsArray[0].checked = true;
               YAHOO.util.Dom.replaceClass(itemsArray[1],"radioOff","radioOn");
                
               //YAHOO.util.Dom.replaceStyle("style1","radioOn","radioOff");
                
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[0],"display","block");
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[1],"display","block");
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[2],"display","block");
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[3],"display","block");
               
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[4],"display","none");
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[5],"display","none");
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[6],"display","none");
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[7],"display","none");
                              
    }
        else
    {
               ResetRadioButtons();
                
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[0],"display","none");
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[1],"display","none");
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[2],"display","none");
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[3],"display","none");
               
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[4],"display","block");
               
               var itemsArray = YAHOO.util.Dom.getElementsBy(isLegitTag,'',PerfumeStyleArray[4]);
               itemsArray[0].checked = true;
               YAHOO.util.Dom.replaceClass(itemsArray[1],"radioOff","radioOn");
              
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[5],"display","block");
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[6],"display","block");
               YAHOO.util.Dom.setStyle(PerfumeStyleArray[7],"display","block");
    }
    
    
    if(enabling) {
        rightImage.childNodes[0].innerHTML = resourceFRAGRANCE_NEXT_QUESTION;
    } else {
        rightImage.childNodes[0].innerHTML = resourceFRAGRANCE_END;
    }
    
};



YAHOO.util.Event.addListener(window, 'load', pageLoad);