// Copyright (c) 2006 Sébastien Gruhier (http://xilinus.com, http://itseb.com)
// 
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// VERSION 0.26

var Carousel = Class.create();
Carousel.prototype = {
  // Constructor
  initialize: function(carouselElemID) {
    this.carouselElemID = carouselElemID;
    
    this.options = Object.extend({
      numVisible:           3,
      scrollInc:            5,
      animParameters:      {},
      buttonStateHandler:  null,
      animHandler:         null,
      ajaxHandler:         null,
      initDoneHandler:     null,
      queue:               "carousel",
      size:                0,
      prevElementID:       "prev-arrow",
      nextElementID:       "next-arrow",
      ajaxParameters:      null,
      url:                 null
		}, arguments[1] || {});

		this.initDone = false;
		this.animRunning = "none";
    this.requestIsRunning = false;
    
		// add afterFinish options to animParameters (store old function)
		this.animAfterFinish = this.options.animParameters.afterFinish;
		Object.extend(this.options.animParameters, {afterFinish:  this._animDone.bind(this), queue: { position:'end', scope: this.options.queue }});
	  
		// Event bindings
		this.prevScroll = this._prevScroll.bindAsEventListener(this);
		this.nextScroll = this._nextScroll.bindAsEventListener(this);
		this.onComplete = this._onComplete.bindAsEventListener(this);
		this.onFailure  = this._onFailure.bindAsEventListener(this);

		Event.observe(this.options.prevElementID, "click", this.prevScroll);
		Event.observe(this.options.nextElementID, "click", this.nextScroll);
		
		// Get DOM UL element
		var carouselListClass = "carousel-list";
		this.carouselList = document.getElementsByClassName(carouselListClass, $(carouselElemID))[0]
		this.options.size =  $(this.carouselList.getElementsByTagName("li")).length;
		// Init data
		this._init();
  },
  
  // Destructor
 	destroy: function() {
  	Event.stopObserving(this.options.prevElementID, "click", this.prevScroll);
  	Event.stopObserving(this.options.nextElementID, "click", this.nextScroll);
	},
	
	scrollTo: function(newStart) {
		var old_inc = this.options.scrollInc;
		this.ignoreNoMoreImages = true;
		if(newStart > this.currentIndex) {
			this.options.scrollInc = newStart - this.currentIndex;
			this._nextScroll(this);
		} else {
			this.options.scrollInc = this.currentIndex - newStart;
			this._prevScroll(this);
		}
    this.options.scrollInc = old_inc;
	},
	
  /* "Private" functions */
  _init: function() {
    this.currentIndex = 0;
      
    // Ajax content
    if (this.options.url)
  	  this._request(this.currentIndex, this.options.numVisible);
	  // Static content
  	else {
  	  this._getLiElementSize();
  		this._updateButtonStateHandler(this.options.prevElementID, false);
  		this._updateButtonStateHandler(this.options.nextElementID, this.options.size > this.options.numVisible);
		this.initDone = true;
      if (this.options.initDoneHandler) 
        this.options.initDoneHandler(this);
  	}
  },
  
  _prevScroll: function(event) {
    if (this.animRunning != "none" || this.currentIndex == 0)
      return;

    var inc = this.options.scrollInc;

    if (this.currentIndex - inc < 0)
      inc = this.currentIndex;

    this._scroll(inc)		  
	  return false;
  },
  
  _nextScroll: function(event) {    
    if (this.animRunning != "none")
      return false;
            
    // Check if there are enough elements in cache
    if (this.currentIndex + this.options.numVisible + this.options.scrollInc <= this.options.size) 
      this._scroll(-this.options.scrollInc);
    else {
      // Compute how many are in the cache
      this.nbInCache = this.options.size - (this.currentIndex + this.options.numVisible);
      if (this.options.url && this.noMoreImages == false) 
		    this._request(this.currentIndex + this.options.numVisible + this.nbInCache, this.options.scrollInc - this.nbInCache);
	    else  {
	      if (this.nbInCache > 0)
          this._scroll(-this.nbInCache);
        }
	  }
	  return false;
  },
  
  _request: function(start, nb) {
    if (this.options.url && ! this.requestIsRunning) {
      this.requestIsRunning = true;
      
      if (this.options.ajaxHandler)
        this.options.ajaxHandler(this, "before");
      
      var params = "start=" + start + "&nb=" + nb;
      if (this.options.ajaxParameters != null)
        params += "&" + this.options.ajaxParameters
      
  		new Ajax.Request(this.options.url, {parameters: params, onComplete: this.onComplete, onFailure: this.onFailure});
		}
  },
  
  _onComplete: function(originalRequest){
    this.requestIsRunning = false;
    this.carouselList.innerHTML += originalRequest.responseText;
    // Compute how many new elements we have
    var size = this.options.size;
    this.options.size = this.carouselList.getElementsByTagName("li").length;
    var inc = this.options.size - size;
    
		// First run, compute li size
		if (this.initDone == false) {
  		this._getLiElementSize()
  		this.currentIndex = 0;
  		this.initDone = true;
      if (this.options.initDoneHandler) 
        this.options.initDoneHandler(this);
         
  		// Update button states
		  this._updateButtonStateHandler(this.options.prevElementID, false);
		  this._updateButtonStateHandler(this.options.nextElementID, this.options.size == this.options.numVisible);
		  this.noMoreImages = this.options.size < this.options.numVisible
		}
		// Add images
		else {
		  if (!this.ignoreNoMoreImages)
		    this.noMoreImages = inc != this.options.scrollInc;
		  else
		    this.ignoreNoMoreImages = false;
		  // Add images
		  if (inc > 0) {
        this._scroll(-inc, this.noMoreImages)
      }
      // No more images, disable next button
		  else {
		    if (this.nbInCache >0)
          this._scroll(-this.nbInCache, true);
		    
		    this._updateButtonStateHandler(this.options.nextElementID, false);
	    }
		}
		if (this.options.ajaxHandler)
      this.options.ajaxHandler(this, "after");
  },
  
  _onFailure: function(originalRequest){    
    this.requestIsRunning = false;
  },

  _animDone: function(event){   
    if (this.options.animHandler)
      this.options.animHandler(this.carouselElemID, "after", this.animRunning);
     
    this.animRunning = "none";
    // Call animAfterFinish if exists
    if (this.animAfterFinish)
      this.animAfterFinish(event);
  },
  
  _updateButtonStateHandler: function(button, state) {
		if (this.options.buttonStateHandler) 
		    this.options.buttonStateHandler(button, state)
   },
  
  _scroll: function(delta, forceDisableNext) {      
    this.animRunning = delta > 0 ? "prev" : "next";
    
    if (this.options.animHandler)
      this.options.animHandler(this.carouselElemID, "before", this.animRunning);

    new Effect.MoveBy(this.carouselList, 0, delta * this.elementSize, this.options.animParameters);
    this.currentIndex -= delta;
    this._updateButtonStateHandler(this.options.prevElementID, this.currentIndex != 0);
    
    if (this.options.url && this.noMoreImages == false)
      enable = true;
    else
      enable = (this.currentIndex + this.options.numVisible < this.options.size);
    this._updateButtonStateHandler(this.options.nextElementID, (forceDisableNext ? false : enable));
  },
  
  _getLiElementSize: function() {
    var li = $(this.carouselList.getElementsByTagName("li")[0]);
		this.elementSize = li.getDimensions().width + parseFloat(li.getStyle("margin-left")) + parseFloat(li.getStyle("margin-right"));
  }
  
  
  
}
	
EventDispenser = Class.create();
EventDispenser.prototype = {
  initialize: function(list) {
    this.list = list;
	this.effect = false;
	this.show  = 0;
	
	this.onComplete = this._onComplete.bindAsEventListener(this);
    this.onShow = this._onShow.bindAsEventListener(this);
	this.onHide = this._onHide.bindAsEventListener(this);
	// Observe clicks on our list items     
    $$(this.list + " li").each(function(item) {
      Event.observe(item, 'mouseover', this.showDesc.bindAsEventListener(this));
	   
    }.bind(this));
	
	
	



 
  },
	
  stopAllObserving: function(element, name) {
    var element = $(element);
      if (!Event.observers) return;
      for (var i = 0; i < Event.observers.length; i++) {
          if(Event.observers[i] && Event.observers[i].element) {
              if(Event.observers[i].name) {
                  Event.stopObserving.apply(this, Event.observers[i]);
                  Event.observers[i] = null;
              }
          }
      }
	},

  // Arbitrary functions to respond to events
  showTagName: function(event) {
	alert(Event.element(event).tagName);
  },

  showDesc: function(el) 
	{
		
		if(this.show == 0) {
			new Effect.Move('html-carousel',{ x: 0, y: -10, mode: "relative", duration: 0.2});
		}
		
		this.effect = new Effect.Appear('slidewrap',{duration:0.3,afterFinish:this.onShow});
		
		
		var element = $(Event.element(el)); 
		
		
		
		if(element.tagName == "LI") {
			
			html = (element.down(".desc").innerHTML);
		}
		else if(element.tagName == "IMG") {
			
			html = (element.up().next(".desc").innerHTML);
		}
		
		
		
		$('rating_desc').innerHTML = html;
		
		
		
		//$('slidewrap').setStyle({left: (leftPosition)+'px', top: (topPosition)+'px', position: 'absolute'});
		
		this.show = 1;
	},
	
	_onShow: function() {
		
		
		
		this.show = 2;
			//Event.observe('html-carousel', 'mouseout', this.hideDesc.bindAsEventListener(this));
			Event.observe('slidewrap', 'mouseout', this.hideDesc.bindAsEventListener(this));
		this.effect.cancel();
	},
	
	_onComplete: function(originalRequest)
	{	
			
			
			
	},
	
	hideDesc: function(event){
		
		
		if (this.show > 1) {
			this.show = 1;
			this.effect = new Effect.Fade('slidewrap',{duration:0.2});
			this.effectmove = new Effect.Move('html-carousel',{ x: 0, y: 10, mode: "relative", duration: 0.3,afterFinish:this.onHide });
			this.stopAllObserving('slidewrap','mouseout');
		}
		else {
			
		}
	},
	
	_onHide: function () {
		this.show = 0;
		this.effect.cancel();
		this.effectmove.cancel();
	},
  

  onMouseMove: function(event) {
    $('mouse').value = "X: " + Event.pointerX(event) + "px Y: " + Event.pointerY(event) + "px";
  }

}

function initRatingHover(cObj)
{
	
	new EventDispenser(".carousel-list");
}