/**
 * @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/  */

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

	moveTo: function(element, container, options){
			this.current = $(element);
			Position.prepare();
	    var containerOffset = Position.cumulativeOffset(container),
	     elementOffset = Position.cumulativeOffset($(element));

		  this.scrolling 	= new Effect.SmoothScroll(container, 
				{duration:options.duration, x:(elementOffset[0]-containerOffset[0]), y:(elementOffset[1]-containerOffset[1])});
		  return false;
		},
		
	jasonMoveTo: function(index){
		this.changeToIndex(index);	
	},
	
	changeToIndex:function(index){
		for(i = 0;i<5;i++){
		//	$('link'+i).style.fontWeight = 'normal';
		}
		//$('link'+index).style.fontWeight = 'bold';
	    this.moveTo(this.sections[index], this.scroller, { 
	      duration: this.options.duration
	    });		
	},
		
  next: function(){	
    if (this.current) {
	  if(this.getTotal() == currentIndex){return;}
      var currentIndex = this.current._index;
      var nextIndex = (this.getTotal() == currentIndex) ? 0 : currentIndex + 1;     	
	  if(nextIndex == 0){ return; }
    } else {

	  var nextIndex = 1;
	}
	
	this.changeToIndex(nextIndex);
  },
  next_one: function(){	
    if (this.current) {
      var currentIndex = this.current._index;
	  if(this.getTotal()-2 == currentIndex){return;}
      var nextIndex = (this.getTotal() == currentIndex) ? 0 : currentIndex + 1;     	
    } else {

	  var nextIndex = 1;
	}
	
	this.changeToIndex(nextIndex);
  },

  getTotal: function(){	
	return this.sections.length -1;
  },
	
  previous: function(){
	
    if (this.current) {
	  if(this.current._index == 0){ return; }
      var currentIndex = this.current._index;
      var prevIndex = (currentIndex == 0) ? this.getTotal() : 
       currentIndex - 1;
    } else {
		var prevIndex = this.getTotal();
	}
   	this.changeToIndex(prevIndex);
  },

	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);
	}, 
	
	fadeTo: function(imgSrc)
	{
/*		alert('Fading Image b4');
		if(this.fading = true){return;}
		alert('Fading Image');*/
		imgSrc = imgSrc.replace(/sm/i, "lg");
		imgSrc = imgSrc.replace(/_over/i, "");
		imgSrc = imgSrc.replace(/_up/i, "");
		lrgSrc = imgSrc.replace(/lg/i, "580");
		$('large_image_hs').href = lrgSrc;
		this.fading = true;
		$('big_image').style.display = 'block';
		$('big_image_container').style.backgroundImage = "url("+imgSrc+")";
		
	this.fading = false;$('big_image').src=imgSrc;$('big_image').style.display='';
	},
	
	fadeToHS: function(imgSrc, idToShow)
	{
/*		alert('Fading Image b4');
		if(this.fading = true){return;}
		alert('Fading Image');*/
		imgSrc = imgSrc.replace(/sm/i, "lg");
		imgSrc = imgSrc.replace(/_over/i, "");
		imgSrc = imgSrc.replace(/_up/i, "");
		lrgSrc = imgSrc.replace(/lg/i, "680");
		$('large_image_hs').href = lrgSrc;
		this.fading = true;
		$('big_image').style.display = 'block';
		$('big_image_container').style.backgroundImage = "url("+imgSrc+")";
		$('big_img_h').src = lrgSrc;
	//	$('big_image_hidden_content').innerHTML = $('big_image_container').innerHTML;
		$('big_image_hidden_content_text').innerHTML = $(idToShow).innerHTML;
	/*	window.hs.htmlExpand($('large_image_hs'), {  contentId:'big_image_hidden_content',
	                    outlineType: 'rounded-white', wrapperClassName: 'highslide-white',
	                    outlineWhileAnimating: true, preserveContent: false });
	*/
		window.hs.htmlExpand($('big_image'), { contentId: 'big_image_hidden_content', allowSizeReduction: true, preserveContent:true } );
		this.fading = false;$('big_image').src=imgSrc;$('big_image').style.display='';
	},
	
	getHtml:function(){
		return $('big_image_container').innerHTML;
	}
	
});

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;
  }
});