/*
Copyright (c) 2009 Victor Stanciu - http://www.victorstanciu.ro

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

Este código es una modificación/evolución del código creado por Victor Stanciu
realizada por Alimagen - http://web.alimagen.com

*/


try{
 if(typeof ProtoCarrusel == 'undefined'){
  var ProtoCarrusel = null;
 }
 else{
  throw{
   name: "Error de variables",
   message: "Hay duplicidad de variables."
  }
 }


 //Clase ProtoCarrusel
 ProtoCarrusel = Class.create(PanelsBox, {
  initialize: function($super, container, options){
   $super(container);
   this.version = '1.4.0';
   this.scrolling = false;
   this.scroller = null;
   this.controls = [];
   this.timer = null;

   Object.extend(Object.extend(this.options, {
    auto:               false,
    afterMove:          null,                 //función a ejecutar después de mover
    beforeMove:         null,
    circular:           false,
    controlClassName:   'carousel-control',
    controlsContainer:  null,
    disabledClassName:  'carousel-disabled',
    duration:           1,
    effect:             'scroll',
    frequency:          6,
    jumperClassName:    'carousel-jumper',
    lapseInterval:      5,
    marginZero:         false,
    next:               true,
    panelClassName:     'carousel-slide',
    selectedClassName:  'carousel-selected',
    transition:         'sinoidal',
    vertical:           false,            //si true implementar en vertical (hay que cambiar las dimensiones del scroller)
    visibleSlides:      1,
    wheel:              false
   }), options || {});

   if(this.options.effect == 'fade') this.options.circular = true;
  },

  //código a ejecutar al cargarse el dom.
  onLoadDom: function($super, e){
   $super(e);

   var containerHtml = this.container.innerHTML;

   //Se crean dos divs dentro del contenedor
   this.scroller = new Element('div').addClassName('scroller').insert(new Element('div').addClassName('contSlides'));
   this.container.insert(this.scroller);
   this.scroller.firstDescendant().innerHTML = containerHtml;
   this.panels.invoke('remove');
   this.panels = this.scroller.select('.' + this.options.panelClassName);

   if(this.options.wheel) this.scroller.observe('mousewheel', this.wheel.bindAsEventListener(this)).observe('DOMMouseScroll', this.wheel.bindAsEventListener(this));

   if(this.options.controlsContainer){
    this.controls = $(this.options.controlsContainer).select('.' + this.options.controlClassName);
    this.controls.invoke('observe', 'click', this._click.bind(this));
    if(this.controls.length){
     this.options.auto = this.options.circular = false;
     if(this.options.controlsContainer) $(this.options.controlsContainer).setStyle({display: 'block'});
    }
   }

   if(this.options.circular){
    this.options.visibleSlides = 1;
    var clonFirst = this.panels[0].clone(true);
    var clonSecond = this.panels[1].clone(true);
    this.panels.last().insert({after: clonFirst});
    this.panels.push(clonFirst);
    this.panels.last().insert({after: clonSecond});
    this.panels.push(clonSecond);
   }
   this.panels.each(function(slide, index){slide.store('_index', index);});
   with(this.scroller) scrollLeft = scrollTop = 0;
   
   function accumulateDimensions(elem, dimsArray){return dimsArray.inject(0, function(acc, dim, n){return acc + parseInt(elem.getStyle(dim));});}
   //Aplicar estilos
   var slideAuxi = this.panels[0];
   var paddings = accumulateDimensions(slideAuxi, ['paddingLeft', 'paddingRight']);
   var borderWidth = accumulateDimensions(slideAuxi, ['borderLeftWidth', 'borderRightWidth']);
   var slidesWidth = slideAuxi.getWidth();
   var slidesWidthWB = slideAuxi.getWidth() - (paddings + borderWidth);
   var maxNumSlides = (this.container.getWidth()/slidesWidth).floor();
   if(this.options.visibleSlides > maxNumSlides) this.options.visibleSlides = maxNumSlides;
   
   var horMargins = 0, verMargins = 0, scrollerHorMargins = 0, scrollerVerMargins = 0, scrollerWidth = 0, scrollerHeight = 0, slidesContWidth = 0, slidesContHeight = 0;
   if(this.options.marginZero) this.panels.invoke('setStyle', {margin: 0 + 'px'});   
   var horMarginsCss = ['marginLeft', 'marginRight'], verMarginsCss = ['marginTop', 'marginBottom'];
   if(this.options.vertical){
    horMargins = accumulateDimensions(slideAuxi, horMarginsCss);
    verMargins = this.panels.inject(0, function(acc, panel, n){return acc + accumulateDimensions(panel, verMarginsCss);});
    scrollerHorMargins = horMargins;
    for(var i = 0; i < this.options.visibleSlides; i++) scrollerVerMargins += accumulateDimensions(this.panels[i], verMarginsCss);
    scrollerWidth = slidesWidth + scrollerHorMargins;
    scrollerHeight = slideAuxi.getHeight() * this.options.visibleSlides + scrollerVerMargins;
    slidesContWidth = scrollerWidth;
    slidesContHeight = slideAuxi.getHeight() * this.panels.length + verMargins;
   }
   else{
    horMargins = this.panels.inject(0, function(acc, panel, n){return acc + accumulateDimensions(panel, horMarginsCss);});
    if(Usefull.IE6) horMargins += accumulateDimensions(this.panels[0], ['marginLeft']);
    verMargins = accumulateDimensions(slideAuxi, verMarginsCss);
    for(var i = 0; i < this.options.visibleSlides; i++) scrollerHorMargins += accumulateDimensions(this.panels[i], horMarginsCss);
    scrollerVerMargins = verMargins;
    scrollerWidth = slidesWidth * this.options.visibleSlides + scrollerHorMargins;
    scrollerHeight = slideAuxi.getHeight() + scrollerVerMargins;
    slidesContWidth = slidesWidth * this.panels.length + horMargins;
    slidesContHeight = scrollerHeight;
   }
   
   //Bug de IE6 duplica márgenes izquierdos en elementos flotantes
   //if(this.IE6) this.panels.each(function(slide){slide.setStyle({'marginLeft': (accumulateDimensions(slide, ['marginLeft']) / 2).ceil() + 'px'});});
   
   this.panels.invoke('setStyle', {
    width: slidesWidthWB + 'px',
    'float': 'left'
   });
   this.scroller.firstDescendant().setStyle({
    width: slidesContWidth + 'px',
    height: slidesContHeight + 'px',
    overflow: 'hidden'
   });
   this.scroller.setStyle({
    width: scrollerWidth + 'px',
    height: scrollerHeight + 'px',
    margin: 0 + 'px',
    overflow: 'hidden'
   });
   this.container.setStyle({
    width: scrollerWidth + 'px',
    height: scrollerHeight + 'px'
   }).scrollTop = 0;
  },

  onLoadDoc: function($super, e){
   $super(e);
   if(this.options.auto) this.start();
  },

  _click: function($super, e){
   var element = $super(e);
   e.stop();
   this.lapse();
   if(element.hasClassName(this.options.disabledClassName)) return;
   else{
    if(element.hasClassName(this.options.controlClassName)) eval("this." + element.rel + "()");
    else if(element.hasClassName(this.options.jumperClassName)){
     var slideIndex = this.validateIndex(element.href.match(/#((?:(?:\w)+[.-]*)+)/) ? $(RegExp.$1).retrieve('_index') : element.retrieve('_index'));
     var currentIndex = this.current.retrieve('_index');
     if(currentIndex == this.lastIndex() && this.options.circular && this.options.effect != 'fade') this.show(this.firstIndex() - 1);
     this.moveTo(slideIndex);
    }
   }
  },
  
  show: function($super){
   $super(arguments[1]);
   
   this.beforeMove();
   var slideOffset = this.offset(this.current);
   with(this.scroller){
    scrollLeft = slideOffset[0];
    scrollTop = slideOffset[1];
   }
   this.afterMove();
  },

  moveTo: function(){
   this.updateCurrent(arguments[0]);
   
   var slideOffset = this.offset(this.current);

   if(this.scrolling) this.scrolling.cancel();
   switch(this.options.effect){
    case 'fade':
     this.scrolling = new Effect.Opacity(this.scroller, {
      from: 1.0,
      to: 0,
      duration: this.options.duration,
      afterFinish: function(){
       this.scroller.scrollLeft = slideOffset[0];
       this.scroller.scrollTop = slideOffset[1];
       new Effect.Opacity(this.scroller, {
        from: 0,
        to: 1.0,
        duration: this.options.duration,
        beforeStart: this.beforeMove.bind(this),
        afterFinish: this.afterMove.bind(this)
       });
      }.bind(this)
     });
     break;

    case 'scroll':
    default:
     var ourTransitions = ['spring'];
     var transition = eval('Effect.Transitions.' + (ourTransitions.include(this.options.transition) ? this.options.transition : 'sinoidal'));
     this.scrolling = new Effect.SmoothScroll(this.scroller, {
      duration: this.options.duration,
      x: slideOffset[0],
      y: slideOffset[1],
      transition: transition,
      beforeStart: this.beforeMove.bind(this),
      afterFinish: this.afterMove.bind(this)
     });
   }
   return false;
  },

  prev: function(){
   var prevIndex = 0;
   var currentIndex = this.current.retrieve('_index');
   prevIndex = currentIndex - this.options.visibleSlides;
   prevIndex = this.validateIndex(prevIndex);
   if(currentIndex == this.firstIndex() && this.options.circular && this.options.effect != 'fade') this.show(this.lastIndex() + 1);
   this.moveTo(prevIndex);
  },

  next: function(){
   var nextIndex = this.options.visibleSlides;
   var currentIndex = this.current.retrieve('_index');
   nextIndex = this.validateIndex(currentIndex + this.options.visibleSlides);
   if(currentIndex == this.lastIndex() && this.options.circular && this.options.effect != 'fade') this.show(this.firstIndex() - 1);
   this.moveTo(nextIndex);
  },

  first: function(){this.moveTo(this.firstIndex());},

  last: function(){this.moveTo(this.lastIndex());},

  toggle: function(){
    if(this.previous) this.moveTo(this.panels[this.previous.retrieve('_index')]);
    else return false;
  },

  stop: function(){if(this.timer) clearTimeout(this.timer);},

  start: function(){this.periodicallyUpdate();},

  pause: function(){
    this.stop();
    this.activateControls();
  },

  lapse: function(){
   if(this.options.auto){
    this.stop();
    this.timer = setTimeout(this.periodicallyUpdate.bind(this), this.options.lapseInterval * 1000);
   }
  },

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

  wheel: function(e){
   var delta = 0;

   this.lapse();
   e = window.event || e;  //Prototype no da soporte para eventos de rueda del ratón. Tampoco carga el evento.
   Event.stop(e);

   if(e.wheelDelta) delta=e.wheelDelta / 120; 
   else if(e.detail) delta=-e.detail / 3;
   if(!this.scrolling){
    this.deactivateControls();
    if(delta > 0) this.prev();
    else this.next(); 
   } 
   return Math.round(delta); //Safari Round
  },

  deactivateControls: function(){this.controls.invoke('addClassName', this.options.disabledClassName);},

  activateControls: function(){
   if(!this.controls.length) return;
   var lastSlideIndex = this.lastIndex();

   if(this.options.circular) this.controls.invoke('removeClassName', this.options.disabledClassName);
   else{
    if(lastSlideIndex == 0) return;
    if(this.current) var currentIndex = this.current.retrieve('_index');
    if(currentIndex != 0 && currentIndex != lastSlideIndex) this.controls.invoke('removeClassName', this.options.disabledClassName);
    else{
     if(currentIndex == 0) this.controls.findAll(function(s){return ['next','last'].include(s.rel);}).invoke('removeClassName',this.options.disabledClassName);
     if(currentIndex == lastSlideIndex) this.controls.findAll(function(s){return ['first','prev'].include(s.rel);}).invoke('removeClassName',this.options.disabledClassName);
    }
   }
  },
  
  updateJumpers: function(){
   if(this.options.selectedClassName && this.jumpers.length){
    var indexOfJumper = this.current.retrieve('_index');
    this.jumpers.invoke('removeClassName', this.options.selectedClassName);
    this.jumpers[indexOfJumper < this.jumpers.length ? indexOfJumper : 0].addClassName(this.options.selectedClassName);
   }
  },
  
  beforeMove: function(){
   this.deactivateControls();
   this.updateJumpers();
   if(this.options.beforeMove && (typeof this.options.beforeMove == 'function'))  this.options.beforeMove();
  },

  afterMove: function(){
   this.activateControls();
   if(this.options.afterMove && (typeof this.options.afterMove == 'function')) this.options.afterMove();
   this.scrolling = false;
  },
  
  //Primer índice válido
  firstIndex: function(){return this.options.circular ? 1 : 0;},
  
  //Último índice válido
  lastIndex: function(){
   var numPanels = this.panels.length;
   var lastValidIndex = numPanels - this.options.visibleSlides;
   return numPanels > this.options.visibleSlides ? (this.options.circular ? lastValidIndex - 1 : lastValidIndex) : 0;
  },
  
  validateIndex: function(slideIndex){
   if(typeof slideIndex == 'undefined'){
    alert('El panel al que saltar no est&aacute; definido correctamente.');
    return this.firstIndex();
   }
   var lastSlideIndex = this.lastIndex(), firstSlideIndex = this.firstIndex();
   if(slideIndex < firstSlideIndex) return this.options.circular || this.options.auto ? lastSlideIndex : firstSlideIndex;
   return slideIndex > lastSlideIndex ? (this.options.circular || this.options.auto ? firstSlideIndex : lastSlideIndex) : slideIndex;
  },
  
  //Desplazamiento de un panel
  offset: function(slide){
   var scrollerOffset = this.scroller.cumulativeOffset();
   var slideOffset = slide.cumulativeOffset();
   var marginLeft = parseInt(slide.getStyle('margin-left'));
   var marginTop = parseInt(slide.getStyle('margin-top'));
   return [(slideOffset[0] - scrollerOffset[0]) - (Usefull.IE6 ? marginLeft * 2 : marginLeft), (slideOffset[1] - scrollerOffset[1]) - marginTop];
  }
 });
 

 //Efecto SmoothScroll
 Effect.SmoothScroll = Class.create(Effect.Base, {
  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;
  }
 });

}
catch(e){
 alert(e.name + ": " + e.message);
}