// Copyright (c) 2007 stickmanlabs

/*-----------------------------------------------------------------------------------------------*/

if (typeof Effect == 'undefined') 
	throw("accordion.js requires including script.aculo.us' effects.js library!");

var accordion = Class.create();
accordion.prototype = {

	//
	//  Setup the Variables
	//
	showAccordion : null,
	currentAccordion : null,
	duration : null,
	effects : [],
	animating : false,
	bookHistory : false,
	
	//  
	//  Initialize the accordions
	//
	initialize: function(container, options) {
	  if (!$(container)) {
	    throw(container+" doesn't exist!");
	    return false;
	  }
	  
		this.options = Object.extend({
			resizeSpeed : 8,
			classNames : {
				toggle : 'accordion_toggle',
				toggleActive : 'accordion_toggle_active',
				toggleDisabled : 'accordion_toggle_disabled',
				content : 'accordion_content'
			},
			defaultSize : {
				height : null,
				width : null
			},
			direction : 'vertical',
			onEvent : 'click'
		}, options || {});
		
		this.duration = ((11-this.options.resizeSpeed)*0.15);

		var accordions = $$('#'+container+' .'+this.options.classNames.toggle);
		accordions.each(this._bind.bind(this));
	},
	
	
	//
	// Click handler. Split out from request since we want to be able to load a
	// bookstep which the user can't click on when the user presses the form's 
	// "Next step" button.
	//
	clickHandler : function(accordion) {
		if (accordion.hasClassName(this.options.classNames.toggleDisabled)) {
			return false;
		} else {
			this.request(accordion);
		}
	},
	
	//
	// xajax call
	//
	request : function(accordion) {
	
		var formname = this.showAccordion.id+'Form';
		//alert(this.showAccordion.previous(0).id);
		//alert(accordion.id);
		ytw_call('modSearch', 'activate_book_step', [this.showAccordion.previous(0).id, accordion.id, xajax.getFormValues(formname,true)],this.bookHistory);
	},
	
	//
	//  Activate an accordion
	//
	activate : function(accordion) {
		if (this.animating) {
			return false;
		}
		
		this.effects = [];
	
		this.currentAccordion = $(accordion.next(0));
		this.currentAccordion.setStyle({
			display: 'block'
		});		
		
		this.currentAccordion.previous(0).addClassName(this.options.classNames.toggleActive);

		if (this.options.direction == 'horizontal') {
			this.scaling = {
				scaleX: true,
				scaleY: false
			};
		} else {
			this.scaling = {
				scaleX: false,
				scaleY: true
			};			
		}
			
		if (this.currentAccordion == this.showAccordion) {
			// do nothing
		  //this.deactivate();
		} else {
		  this._handleAccordion();
		}
	},
	// 
	// Deactivate an active accordion
	//
	deactivate : function() {
		var options = {
		  duration: this.duration,
			scaleContent: false,
			transition: Effect.Transitions.sinoidal,
			queue: {
				position: 'end', 
				scope: 'accordionAnimation'
			},
			scaleMode: { 
				originalHeight: this.options.defaultSize.height ? this.options.defaultSize.height : this.currentAccordion.scrollHeight,
				originalWidth: this.options.defaultSize.width ? this.options.defaultSize.width : this.currentAccordion.scrollWidth
			},
			afterFinish: function() {
				this.showAccordion.setStyle({
          height: 'auto',
					display: 'none'
				});				
				this.showAccordion = null;
				this.animating = false;
			}.bind(this)
		};    
    //options.merge(this.scaling);
    Object.extend(options, this.scaling); // Prototype 1.6 fix

    this.showAccordion.previous(0).removeClassName(this.options.classNames.toggleActive);
    
		new Effect.Scale(this.showAccordion, 0, options);
	},

  //
  // Handle the open/close actions of the accordion
  //
	_handleAccordion : function() {
		var options = {
			sync: true,
			scaleFrom: 0,
			scaleContent: false,
			transition: Effect.Transitions.sinoidal,
			scaleMode: { 
				originalHeight: this.options.defaultSize.height ? this.options.defaultSize.height : this.currentAccordion.scrollHeight,
				originalWidth: this.options.defaultSize.width ? this.options.defaultSize.width : this.currentAccordion.scrollWidth
			}
		};
		//options.merge(this.scaling);
		Object.extend(options, this.scaling); // Prototype 1.6 fix
		
		this.effects.push(
			new Effect.Scale(this.currentAccordion, 100, options)
		);

		if (this.showAccordion) {
			this.showAccordion.previous(0).removeClassName(this.options.classNames.toggleActive);
			
			options = {
				sync: true,
				scaleContent: false,
				transition: Effect.Transitions.sinoidal
			};
			//options.merge(this.scaling);
			Object.extend(options, this.scaling); // Prototype 1.6 fix
			
			this.effects.push(
				new Effect.Scale(this.showAccordion, 0, options)
			);				
		}
		
    new Effect.Parallel(this.effects, {
			duration: this.duration, 
			queue: {
				position: 'end', 
				scope: 'accordionAnimation'
			},
			beforeStart: function() {
				this.animating = true;
			}.bind(this),
			afterFinish: function() {
				if (this.showAccordion) {
					this.showAccordion.setStyle({
						display: 'none'
					});				
				}
				$(this.currentAccordion).setStyle({
				  height: 'auto'
				});
				this.showAccordion = this.currentAccordion;
				this.animating = false;
			}.bind(this)
		});
	},
	//
	// Bind the click event
	//
	_bind : function(accordion) {
			Event.observe(accordion, this.options.onEvent, this.clickHandler.bind(this, accordion), false);
			if (this.options.onEvent == 'click') {
			  accordion.onclick = function() {return false;};
			}
			
			if (this.options.direction == 'horizontal') {
				var options = {width: '0px'};
			} else {
				var options = {height: '0px'};
			}
			//options.merge({display: 'none'});
			Object.extend(options, {display: 'none'}); // Prototype 1.6 fix
			
			this.currentAccordion = $(accordion.next(0)).setStyle(options);		
	}
}