/**
 * @author Bruno Bornsztein <bruno@missingmethod.com>
 * @copyright 2007 Curbly LLC
 * @package Glider
 * @license MIT
 * @url http://www.missingmethod.com/projects/glider/
 * @version 0.0.3
 * @dependencies prototype.js 1.5.1+, effects.js
 */

/*  Thanks to Andrew Dupont for refactoring help and code cleanup - http://andrewdupont.net/  */
	    
//*** AJH Extra bits ***
var intCurrent;
intCurrent = 1;

var intMax;
//intMax = 8;

var PageURL;

Glider = Class.create();
Object.extend(Object.extend(Glider.prototype, Abstract.prototype), {
	initialize: function(wrapper, options, setMax){
	    this.scrolling  = false;
	    this.wrapper    = $(wrapper);
	    this.scroller   = this.wrapper.down('div.scroller');
	    this.sections   = this.wrapper.getElementsBySelector('div.section');
	    this.options    = Object.extend({ duration: 1.0, frequency: 3 }, options || {}); //3
	    
	    intMax = setMax

	    this.sections.each( function(section, index) {
	      section._index = index;
	    });    

	    this.events = {
	      click: this.click.bind(this)
	    };

	    this.addObservers();
			if(this.options.initialSection) this.moveTo(this.options.initialSection, this.scroller, { duration:this.options.duration });  // initialSection should be the id of the section you want to show up on load
			if(this.options.autoGlide) this.start();
	
        setHighlight(intCurrent);
	    
	  },
	
  addObservers: function() {
    var controls = this.wrapper.getElementsBySelector('div.controls a');
    controls.invoke('observe', 'click', this.events.click);
  },	

  click: function(event) {
		this.stop();
    var element = Event.findElement(event, 'a');
    if (this.scrolling) this.scrolling.cancel();
    
    this.moveTo(element.href.split("#")[1], this.scroller, { duration:this.options.duration });     
    Event.stop(event);
        
    //*** AJH ***
    var strURL
    strURL = element.href.split("#")[1];
    intCurrent = strURL.split("n")[1];
    clearAll();
    //alert(element.href);
    setHighlight(intCurrent);
  },

	moveTo: function(element, container, options){
			this.current = $(element);
						
			var tmpCurrent
			tmpCurrent = this.current.id.split("n")[1];
			//alert("to move to:" + tmpCurrent);
						
			if((eval(tmpCurrent) + eval(5)) >= intMax)
			{
			    if((eval(tmpCurrent) + eval(3)) > intMax)
			    {
			        //alert('Here1');
			        this.current = document.getElementById("section" + (intMax - 4));
			        if(!this.current)
				    {
				        //alert('Here6');
					    this.current = document.getElementById("section1");
				    };
			    }else
			    {
			        //alert('Here2');
			        this.current = document.getElementById("section" + (tmpCurrent - 2));
			        if(!this.current)
				    {
				        //alert('Here3');
					    this.current = document.getElementById("section1");
				    };
			    }
		    }else
		    {
		        if((eval(tmpCurrent) - eval(2)) <= 0)
		        {
		            //alert('Here4');
                    this.current = document.getElementById("section" + (1));
                }else
                {
                    //alert('Here5');
                    this.current = document.getElementById("section" + (eval(tmpCurrent) - eval(2)));
                }
		    }
		    
		    //alert("section" + (eval(tmpCurrent) - eval(2)));
		    element = this.current.id;
		    
		    Position.prepare();
	        var containerOffset = Position.cumulativeOffset(container),
	        elementOffset = Position.cumulativeOffset($(element));

		    this.scrolling 	= new Effect.SmoothScroll(container, 
			    {duration:options.duration, x:(elementOffset[0]-containerOffset[0]), y:(elementOffset[1]-containerOffset[1])});
		    return false;
			
		},
		
  next: function(){
    if (this.current) {
    
      intCurrent = intCurrent - 1
          
      var currentIndex = intCurrent;
      var nextIndex = (this.sections.length - 1 == currentIndex) ? 0 : currentIndex + 1;      
       currentIndex + 1;
    } else 
    {
      var nextIndex = 1
    }
    
    //alert(this.sections.length);
    
    this.moveTo(this.sections[nextIndex], this.scroller, { 
      duration: this.options.duration
    });
    
    clearAll();
    intCurrent = this.sections[nextIndex].id.split("n")[1];
    setHighlight(intCurrent);
  },
	
  previous: function(){
    if (this.current) {
    
      intCurrent = intCurrent - 1
    
      var currentIndex = intCurrent;
      var prevIndex = (currentIndex == 0) ? this.sections.length - 1 : 
       currentIndex - 1;
    } else 
    {
      var prevIndex = this.sections.length - 1;
    }
    this.moveTo(this.sections[prevIndex], this.scroller, { 
      duration: this.options.duration
    });
    
    clearAll();
    intCurrent = this.sections[prevIndex].id.split("n")[1];
    setHighlight(intCurrent);
  },

	stop: function()
	{
		clearTimeout(this.timer);
	},
	
	start: function()
	{
		this.periodicallyUpdate();
	},
		
	periodicallyUpdate: function()
	{ 
		if (this.timer != null) {
			clearTimeout(this.timer);
			this.next();
		}
		this.timer = setTimeout(this.periodicallyUpdate.bind(this), this.options.frequency*1000);
	}

});

Effect.SmoothScroll = Class.create();
Object.extend(Object.extend(Effect.SmoothScroll.prototype, Effect.Base.prototype), {
  initialize: function(element) {
    this.element = $(element);
    var options = Object.extend({
      x:    0,
      y:    0,
      mode: 'absolute'
    } , arguments[1] || {}  );
    this.start(options);
  },
  setup: function() {
    if (this.options.continuous && !this.element._ext ) {
      this.element.cleanWhitespace();
      this.element._ext=true;
      this.element.appendChild(this.element.firstChild);
    }
   
    this.originalLeft=this.element.scrollLeft;
    this.originalTop=this.element.scrollTop;
   
    if(this.options.mode == 'absolute') {
      this.options.x -= this.originalLeft;
      this.options.y -= this.originalTop;
    } 
  },
  update: function(position) {   
    this.element.scrollLeft = this.options.x * position + this.originalLeft;
    this.element.scrollTop  = this.options.y * position + this.originalTop;
  }
});




function setHighlight(boxNumber)
{
    var box;
    //alert('section' + boxNumber);
    box = document.getElementById('section' + boxNumber);
    box.style.border="3px solid #fff";
    
    var mainImage
    mainImage = document.getElementById('divMain' + boxNumber);
    mainImage.style.display = "block";
    
    //Refresh AdTech Ads
	RefreshAds(boxNumber);
	
	
}

function clearAll()
{
    for (i=1;i<=intMax;i=i+1) 
    {
        var box;
        //alert('section' + i);
        box = document.getElementById('section' + i);
        box.style.border="3px solid transparent";
        
        var mainImage
        mainImage = document.getElementById('divMain' + i);
        mainImage.style.display = "none";
    }
}


function RefreshAds(boxNumber) {
    //WebTrends Refresh
    if (PageURL) {
        dcsMultiTrack('DCS.dcsuri', PageURL, 'WT.cg_n', ContentGroup);
        urchinTracker(PageURL);
    }

    if (typeof window.refreshBanner == 'function') {
        refreshBanner();
    }

    if (typeof window.refreshMPU == 'function') {
        refreshMPU();
    }

    if (typeof window.refreshSky == 'function') {
        refreshSky();
    }
}