var JA_RSSLIDER = new Class({
    options:{
        w: 100,
        h: 200,
        num_elem: 4,
		total: 0,
		url: '',
        mode: 'horizontal',
        direction: 'right',
        wrapper: 'ja-slide-wrapper',
        duration: 1000,
        interval: 3000,
        auto: 1
    },
    
    initialize: function(options)
    {
        this.options = options;
		if (this.options.total){
            if (this.options.total < this.options.num_elem) this.options.num_elem = this.options.total;
			this.elements = new Array(this.options.total);
        }else
			this.elements = new Array();
			
        this.current = 0;
        $(this.options.wrapper).setStyle('position', 'relative');
        $(this.options.wrapper).setStyle('overflow', 'hidden');
		if(this.options.mode=='virtical'){
			$(this.options.wrapper).setStyle('width', this.options.w);
			$(this.options.wrapper).setStyle('height', this.options.h*this.options.num_elem);
		}else{
			this.options.w = this.options.w + this.options.paddingThumb;
			$(this.options.wrapper).setStyle('width', this.options.w*this.options.num_elem);
			$(this.options.wrapper).setStyle('height', this.options.h);
		}

		this.objs = new Array();
		this.objs[0] = document.getElementById("ja-rsslidescroll_1");			
		this.objs[1] = document.getElementById("ja-rsslidescroll_2");	
		
		this.img = new Element('img');
		this.img.setProperty('id','ja-rsslideimg-full');

		this.ef_u = {};
		this.ef_d = {};
		this.ef_l = {};
		this.ef_r = {};
        for(i=0;i<=this.options.num_elem;i++) {
    		this.ef_u[i] = { 'top': [ i*this.options.h, (i-1)*this.options.h] };
    		this.ef_d[i] = { 'top': [ (i-1)*this.options.h, i*this.options.h] };
    		this.ef_l[i] = { 'left': [ i*this.options.w, (i-1)*this.options.w] };
    		this.ef_r[i] = { 'left': [ (i-1)*this.options.w, i*this.options.w] };
        }
    },
    
    getFx: function(){		
        if (this.options.mode == 'virtical') {
            if (this.options.direction == 'up') {
                return this.ef_u;
            }else{
                return this.ef_d;
            }
        }else{
            if (this.options.direction == 'left') {
                return this.ef_l;
            }else{
                return this.ef_r;
            }
        }
    },
    
    add: function(text){
        var divobj = new Element('DIV', {'id':'jsslide_' + this.elements.length, 'class':'jsslide'});
        divobj.innerHTML = text;
        divobj.setStyle ('position','absolute');
        divobj.setStyle('width', this.options.w);
        divobj.setStyle('height', this.options.h);
        if(this.elements.length > 1) {
            divobj.injectAfter (this.elements[this.elements.length-2]);
        }else{
            divobj.inject ($(this.options.wrapper));
        }
		this.hide(divobj);
        this.elements.push(divobj);
    },
    
	//Update element i
	update: function (text, ind){
        divobj = new Element('DIV', {'id':'jsslide_' + ind, 'class':'jsslide'});
        divobj.innerHTML = text;
        divobj.setStyle ('position','absolute');
        divobj.setStyle('width', this.options.w);
        //divobj.setStyle('height', this.options.h);
		divobj.inject ($(this.options.wrapper));
		this.hide(divobj);
		this.elements[ind] = divobj;
	},
	
    hide: function (el) {		
        if (this.options.mode == 'virtical') {
            el.setStyle('top', '-999em');
            el.setStyle('left', '0');            
        }else{
            el.setStyle('top', '0');
            el.setStyle('left', '-999em');            
        }
    },
	
    setPos: function (elems) {
		if (!elems) elems = this.getRunElems();
        for(var i=0;i<elems.length;i++) {
			var el = elems[i];
			if (el){
				if (this.options.mode == 'virtical') {
					if (this.options.direction == 'up') {
						el.setStyle('top', this.options.h*i);
					}else{
						el.setStyle('top', this.options.h*(i-1));                
					}
				}else{
					if (this.options.direction == 'left') {
						el.setStyle('left', this.options.w*i);
					}else{
						el.setStyle('left', this.options.w*(i-1));                
					}
				}
			}
		}
    },

	getRunElems: function(){
        var objs = new Array();
		if(this.options.direction=='left' || this.options.direction=='up'){
			adj = 0;
		}else{
			adj = this.elements.length-1;
		}
        for(var i=0;i<=this.options.num_elem;i++) {
            objs[i] = this.elements[(this.current+i+adj) % this.elements.length];
        }
        if (this.options.total <= this.options.num_elem) {
            if(this.options.direction=='left' || this.options.direction=='up'){
                objs[this.options.num_elem] = null;
            }else{
                objs[0] = null;
            }
        }
 		return objs;		
	},
	
    start: function () {
		this.clearTimeOut();
		if (!this.elements[this.next()]) {
			this.nextRun();
			return;
		}
		if (this.elements[this.next()] == 'fetching') {
			this.nextRun();
			return;
		}
		if(this.running) return;
		this.running = 1;
		
        var objs = this.getRunElems();
		this.setPos(objs);
        this.x = new Fx.Elements(objs, {duration: this.options.duration, onComplete:this.end.bind(this)});
		this.x.start(this.getFx());
		this.current = this.nextCurr();
 		this.onChangeImage(this.current);
   },
	
	end: function() {
		this.running = 0;
		if(this.onchange){
			this.timeOut = setTimeout(this.end.bind(this),100);			
		}
		else{
			this.nextRun();	
		}
		window.fireEvent('changeImg');
	},
    
	clearTimeOut: function(){
		if(this.timeOut) {
			clearTimeout(this.timeOut);
			this.timeOut = 0;			
		}
	},
	
    nextRun: function () {
		this.clearTimeOut();
		if (this.options.total <= this.options.num_elem) return;
		if (this.options.auto){
			this.timeOut = setTimeout(this.start.bind(this),this.options.interval);
			this.fetchNext();
		}
    },
	
	nextCurr: function () {
		var next = 0;
		if(this.options.direction=='left' || this.options.direction=='up'){
	        next = (this.current+1) % this.elements.length;
		}else{
	        next = (this.current+this.elements.length-1) % this.elements.length;			
		}
		return next;
	},

	next: function () {
		var next = 0;
		if(this.options.direction=='left' || this.options.direction=='up'){
	        next = (this.current+this.options.num_elem) % this.elements.length;
		}else{
	        next = (this.current+this.elements.length-1) % this.elements.length;			
		}
		return next;
	},
	
	fetchNext: function(){
		var next = this.next();
	},
	
	fetchUpdate: function(text,next){
		this.update(text, next);
	},
	
  	onChangeImage: function (idactive) {
		if(!this.options.mouseis){
			$('jsslide_' + this.options.active).removeClass('active');
			this.options.active = idactive;
			$('jsslide_' + idactive).addClass('active');
			//$('ja-rsslideimg-full').src = $('img_rsslide_id_' + idactive).src;
			this.bigImage(idactive);
		}
    },

	bigImage: function(idactive) {
		if(!this.onchange){
			this.onchange = 1;			
			this.objs[1].style.Opacity = 0;
			var nameimg = $('img_rsslide_id_' + idactive).alt;
			if(this.options.lightbox){
				text = '<a href="'+ this.options.url[idactive] + '" class="ja_rsslide_link" id="ja_rsslide_link_' + idactive + '"><img src="'+ this.options.livesite + '/' + this.options.folder + nameimg  + '" width="' + this.options.bw + '" /></a>';	
			}
			else{
				text = '<img src="'+ this.options.livesite + '/' + this.options.folder + nameimg  + '" width="' + this.options.bw + '" />';	
			}			
			this.objs[1].innerHTML = text;
			xbi = new Fx.Elements(this.objs, { wait: false, duration: this.options.bigduration, onComplete:this.animation2.bind(this,this.objs)});
			ef = {};
			ef[0] = { 'opacity': [ 1, 0] };
			ef[1] = { 'opacity': [ 0, 0] };
			xbi.start(ef);
		}
		return false;
	},

	
	animation2:function () {
		this.objs[1].style.display="block";
		xbi = new Fx.Elements(this.objs, { wait: false, duration: this.options.bigduration, onComplete:this.swap.bind(this,this.objs)});
		ef = {};
		ef[0] = { 'opacity': [ 0, 0] };
		ef[1] = { 'opacity': [ 0, 1] };
		xbi.start(ef);
		return false;
	},

	swap: function() {
		term = this.objs[0];
		this.objs[0] = this.objs[1];
		this.objs[1] = term;
		this.onchange = 0;
	},
	
	setDirection: function (direction){
		this.options.direction = direction;
	}


});