/** @author Mario Fischer <mario@chipwreck.de> */
var CwSlideshow=new Class({Implements:[Events,Options],counter:0,isRunning:false,myTimer:false,mySpinner:false,options:{imagePath:false,setDimensions:false,setAltTag:true,setTitleTag:true,target:'my-image',targetOuter:'my-gallery',targetCaption:'my-slideshow-captions',targetCounter:'my-counter',initialImage:1,initialSlideshow:false,initialSpinner:false,loop:true,random:false,slideshowDelay:5000,loadingMessage:'Bild laden..',counterOutput:'_COUNT_ / _TOTAL_',morphDuration:600,morphInnerDelay:300,morphTransition:Fx.Transitions.Sine.easeOut,keysEnabled:true,onBeforeLoad:function(){},onShown:function(){},onAdvance:function(){},onStatusChange:function(elem,status){},onLoaded:function(i){this.assetsLoaded[i]=true;this.showImage(i);},onPreloaded:function(i){this.assetsLoaded[i]=true;}},initialize:function(images,options)
{this.setOptions(options);var keyupEvt=function(e){if(this.options.keysEnabled){switch(e.key){case'left':this.fireEvent('statusChange',['prev','flash']);this.prev();break;case'right':this.fireEvent('statusChange',['next','flash']);this.next();break;case'space':this.toggleSlideshow();break;case'esc':this.stop();break;}}}.bind(this);if(this.options.imagePath){this.images=images.map((function(item){item.src=this.options.imagePath+item.src;return item;}).bind(this));}
else{this.images=images;}
if((this.options.target.indexOf('_COUNT_')==0)&&(!document.id(this.options.targetOuter)||!document.id(this.options.target))){console.log("Target elements not found, exiting.");return;}
this.max=images.length;this.assetsLoaded=new Array(this.max);this.mySpinner=new Spinner(this.options.targetOuter,{useIframeShim:true,message:this.options.loadingMessage});document.addEvent('keyup',keyupEvt);if(Browser.ie){if(document.id(this.options.target)){document.id(this.options.target).setStyle('msInterpolationMode','bicubic');}}
if(this.options.initialSpinner){this.mySpinner.show();}
if(this.options.initialImage){this.show(this.options.initialImage-1);}
if(this.options.initialSlideshow){this.start();}},preloadAndShowImage:function(i)
{new Asset.image(this.images[i].src,{onload:function(){this.fireEvent('loaded',i);}.bind(this)});},preloadImage:function(i)
{if(!this.assetsLoaded[i]){new Asset.image(this.images[i].src,{onload:function(){this.fireEvent('preloaded',i);}.bind(this)});}},preloadAndShowAllImages:function()
{var self=this;var imagepaths=new Array(this.max);this.images.each(function(item,idx){imagepaths[idx]=item.src;});Asset.images(imagepaths,{onProgress:function(counter,idx){document.id(self.getTargetForIndex(idx)).setStyle('background-image','none');document.id(self.getTargetForIndex(idx)).set('src',self.images[idx].src);},onComplete:function(){self.mySpinner.hide();},onError:function(err,counter,idx){self.mySpinner.hide();}});},fadeImage:function(i)
{this.fireEvent('beforeLoad');if(this.assetsLoaded[i]){this.showImage(i);}
else{this.mySpinner.show();this.preloadAndShowImage(i);}},showImage:function(i)
{var self=this;var morph=new Fx.Morph(this.options.targetOuter,{link:'chain',duration:this.options.morphDuration,transition:this.options.morphTransition});morph.start({'opacity':0}).chain(function(){document.id(self.options.target).set('src',self.images[i].src);if(self.options.setTitleTag){document.id(self.options.target).set('title',self.convertEntities(self.images[i].caption));}
if(self.options.setAltTag){document.id(self.options.target).set('alt',self.convertEntities(self.images[i].caption));}
if(self.options.setDimensions&&self.images[i].dimensions.w>0&&self.images[i].dimensions.h>0){document.id(self.options.target).set('width',self.images[i].dimensions.w);document.id(self.options.target).set('height',self.images[i].dimensions.h);}
self.mySpinner.hide();if(document.id(self.options.targetCaption)){document.id(self.options.targetCaption).set('html',self.images[i].caption);}
if(document.id(self.options.targetCounter)){var counterHtml=self.options.counterOutput.replace(/_COUNT_/,(self.counter+1)).replace(/_TOTAL_/,self.max);document.id(self.options.targetCounter).set('html',counterHtml);}
this.callChain();},function(){var fadeIn=function(){morph.start({'opacity':1});self.fireEvent('shown');};fadeIn.delay(self.options.morphInnerDelay);if((i+1)<self.max){self.preloadImage(i+1);}
if((i+2)<self.max){self.preloadImage(i+2);}
if((i-1)>0){self.preloadImage(i-1);}});},show:function(which)
{this.counter=which;this.validateCounter();this.fadeImage(this.counter);},next:function()
{this.counter++;if(!this.validateCounter()){return;}
this.fadeImage(this.counter);},prev:function()
{this.counter--;if(!this.validateCounter()){return;}
this.fadeImage(this.counter);},advance:function()
{if(this.options.random){this.counter=this.getRandomIndex();this.fadeImage(this.counter);this.fireEvent('advance');}
else{this.next();this.fireEvent('advance');}},start:function()
{if(!this.isRunning&&this.max>0){this.isRunning=true;this.advance();this.myTimer=this.advance.periodical(this.options.slideshowDelay,this);this.fireEvent('statusChange',['slideshow',this.isRunning]);}},stop:function()
{if(this.isRunning){this.isRunning=false;clearInterval(this.myTimer);this.fireEvent('statusChange',['slideshow',this.isRunning]);}},getRandomIndex:function()
{var newCounter;var i=0;while(true){newCounter=parseInt(Math.random()*this.max,10);i++;if(newCounter!==this.counter||i>10){break;}}
return newCounter;},validateCounter:function()
{if(this.max===1){return false;}
var ret=true;if(this.options.loop){if(this.counter>=this.max){this.counter=0;}
else if(this.counter<0){this.counter=this.max-1;}}
else{var newcounter=this.counter.limit(0,this.max-1);if((newcounter===0||newcounter===this.max-1)&&newcounter!==this.counter){ret=false;}
this.counter=newcounter;}
return ret;},toggleSlideshow:function()
{if(this.isRunning){this.stop();}
else{this.start();}},getTargetForIndex:function(i)
{return this.options.target.replace(/_COUNT_/,i);},setKeysEnabled:function(value)
{this.options.keysEnabled=value;},convertEntities:function(str)
{var temp=document.createElement("pre");temp.innerHTML=str;return temp.firstChild.nodeValue;}});