/************************************
	*	Class slideShow   				*
	*	Author: Jerome Guilbot			*
	*	Version: 1.1
	*************************************/
	
	var slideShow = Class.create();
	
	slideShow.prototype = {
	
		initialize: function(aElems, aOptions)
		{
			/* Configuration */
			
			this.bDebug 	= false;				// if Firebug is installed
			this.bLoop      = true;					// activates loops
			this.bEffects 	= true;					// activates effects during transition
			this.imagePath	= aOptions.imagePath	//'/uploads/photos/';	// path to image folder
			this.container  = aOptions.container;
			//this.controls  	= 'controls'; 
			this.width		= '542';
			this.height		= '350';
			
			/* if loops activated */
			this.delay 		= 4;			// time between switches in sec
			
			/* if effects activated*/
			this.transition = 1;			// animation duration in sec
			
			/* Configuration end */
			this.aElems 	= aElems;
			this.aPicIds 	= new Array();
			this.currentKey;
			
			
			var i = 0;
			
			for (var key in this.aElems) {
	
				$(this.container).innerHTML += '<img src="'+this.imagePath+key+'" id="pic_'+i+'" style="display:none" width="'+this.width+'" height="'+this.height+'" alt="" onclick="window.location.href=\''+this.aElems[key]+'\'" />'; // pre-loads images
				
				//this.addToPager(i);	// paginates
				
				this.aPicIds.push('pic_'+i);
				
				i++;
			}
			
			if (this.aPicIds.length < 2) { // do not loop if less than 1 photo
				this.bLoop = false;
			} else {
				//$(this.controls).show();
			}
			
			if (this.aPicIds.length > 0) {
				this.currentKey = 0;
				this.show(this.currentKey);
			}
	
		},
		
		next: function()
		{
			if (this.currentKey == this.aPicIds.length-1) { 	// if end of the array...
				var nextPicKey = 0; 							//... back to the beginning
			} else { 
				var nextPicKey = parseInt(this.currentKey)+1;
			}
			
			if (this.aPicIds[nextPicKey]) {
				this.show(nextPicKey);
			}
		},
		
		previous: function()
		{
			if (this.currentKey == 0) {  						// if beginning of the array...
				var previousPicKey = this.aPicIds.length-1; 	//... back to the end
			} else { 
				var previousPicKey = parseInt(this.currentKey)-1;
			}
			
			if (this.aPicIds[previousPicKey]) {
				this.show(previousPicKey);
			}
	
		},
		
		show: function(picKey)
		{
			if ($(this.aPicIds[picKey])) {
			
				if (this.bLoop) this.loop('stop');
				
				this.hide(this.aPicIds[this.currentKey]);
				//$('a' + (this.currentKey)).className = '';
				
				this.currentKey = picKey;
				//$('a' + (this.currentKey)).className = 'selected';
				
				if (this.bEffects) {
					new Effect.Appear(this.aPicIds[this.currentKey], {
						queue: 'end',
						duration: this.transition
					})
				} else {
					$(this.aPicIds[this.currentKey]).show();	// show() is a built-in function of the prototype library, not the method of this class
				}
				
				if (this.bLoop) this.loop('start');
			}
			this.sendConsole('current pic: ' + this.aPicIds[this.currentKey]);
		},
		
		hide: function(picId)
		{
			if ($(picId)) {
				if (this.bEffects) {
					new Effect.Fade(picId, {
						queue: 'end',
						duration: this.transition
					})
				} else {
					$(picId).hide();
				}
			}
		},
		
		loop: function(action)
		{
			if (action == 'start') {
				this.timeoutId = setTimeout(this.next.bind(this), this.delay*1000);
				this.sendConsole('loop start');
			} else if (action == 'stop') {
				if (this.timeoutId) clearTimeout(this.timeoutId);
				this.sendConsole('loop stop');
			}
		},
		
		addToPager: function(id)
		{
			var element	= '<li><a href="javascript: slideshow.show(\''+ id +'\')" id="a'+ id +'" >'+ (id+1) +'</a></li>';
			Element.insert($(this.controls).lastChild, { before: element });
		},
		
		sendConsole: function(elem)
		{
			if (typeof(console) != "undefined" && this.bDebug) console.debug(elem);
		}
	};