(function( window, $, undefined ) {
	
	/*
	* smartresize: debounced resize event for jQuery
	*
	* latest version and complete README available on Github:
	* https://github.com/louisremi/jquery.smartresize.js
	*
	* Copyright 2011 @louis_remi
	* Licensed under the MIT license.
	*/

	var $event = $.event, resizeTimeout;

	$event.special.smartresize 	= {
		setup: function() {
			$(this).bind( "resize", $event.special.smartresize.handler );
		},
		teardown: function() {
			$(this).unbind( "resize", $event.special.smartresize.handler );
		},
		handler: function( event, execAsap ) {
			// Save the context
			var context = this,
				args 	= arguments;

			// set correct event type
			event.type = "smartresize";

			if ( resizeTimeout ) { clearTimeout( resizeTimeout ); }
			resizeTimeout = setTimeout(function() {
				jQuery.event.handle.apply( context, args );
			}, execAsap === "execAsap"? 0 : 100 );
		}
	};

	$.fn.smartresize 			= function( fn ) {
		return fn ? this.bind( "smartresize", fn ) : this.trigger( "smartresize", ["execAsap"] );
	};
	
	$.Accordion 				= function( options, element ) {
	
		this.$el			= $( element );
		// list items
		this.$items			= this.$el.children('ul').children('li');
		// total number of items
		this.itemsCount		= this.$items.length;
		
		// initialize accordion
		this._init( options );
		
	};
	
	$.Accordion.defaults 		= {
		// index of opened item. -1 means all are closed by default.
		open			: -1,
		// if set to true, only one item can be opened. Once one item is opened, any other that is opened will be closed first
		oneOpenedItem	: false,
		// speed of the open / close item animation
		speed			: 600,
		// easing of the open / close item animation
		easing			: 'easeInOutExpo',
		// speed of the scroll to action animation
		scrollSpeed		: 900,
		// easing of the scroll to action animation
		scrollEasing	: 'easeInOutExpo'
    };
	
	$.Accordion.prototype 		= {
		_init 				: function( options ) {
			
			this.options 		= $.extend( true, {}, $.Accordion.defaults, options );
			
			// validate options
			this._validate();
			
			// current is the index of the opened item
			this.current		= this.options.open;
			
			// hide the contents so we can fade it in afterwards
			this.$items.find('div.st-content').hide();
			
			// save original height and top of each item	
			this._saveDimValues();
			
			// if we want a default opened item...
			if( this.current != -1 )
				this._toggleItem( this.$items.eq( this.current ) );
			
			// initialize the events
			this._initEvents();
			
		},
		_saveDimValues		: function() {
		
			this.$items.each( function() {
				
				var $item		= $(this);
				
				$item.data({
					originalHeight 	: $item.find('a:first').height(),
					offsetTop		: $item.offset().top
				});
				
			});
			
		},
		// validate options
		_validate			: function() {
		
			// open must be between -1 and total number of items, otherwise we set it to -1
			if( this.options.open < -1 || this.options.open > this.itemsCount - 1 )
				this.options.open = -1;
	 	
		},
		_initEvents			: function() {
			
			var instance	= this;
			
			// open / close item
			this.$items.find('a:first').bind('click.accordion', function( event ) {
				
				var $item			= $(this).parent();
				
				// close any opened item if oneOpenedItem is true
				if( instance.options.oneOpenedItem && instance._isOpened() && instance.current!== $item.index() ) {
					
					instance._toggleItem( instance.$items.eq( instance.current ) );
				
				}
				
				// open / close item
				instance._toggleItem( $item );
				
				return false;
			
			});
			
			$(window).bind('smartresize.accordion', function( event ) {
				
				// reset orinal item values
				instance._saveDimValues();
			
				// reset the content's height of any item that is currently opened
				instance.$el.find('li.st-open').each( function() {
					
					var $this	= $(this);
					$this.css( 'height', $this.data( 'originalHeight' ) + $this.find('div.st-content').outerHeight( true ) );
				
				});
				
				// scroll to current
				if( instance._isOpened() )
				instance._scroll();
				
			});
			
		},
		// checks if there is any opened item
		_isOpened			: function() {
		
			return ( this.$el.find('li.st-open').length > 0 );
		
		},
		// open / close item
		_toggleItem			: function( $item ) {
			
			var $content = $item.find('div.st-content');
			
			( $item.hasClass( 'st-open' ) ) 
					
				? ( this.current = -1, $content.stop(true, true).fadeOut( this.options.speed ), $item.removeClass( 'st-open' ).stop().animate({
					height	: $item.data( 'originalHeight' )
				}, this.options.speed, this.options.easing ) )
				
				: ( this.current = $item.index(), $content.stop(true, true).fadeIn( this.options.speed ), $item.addClass( 'st-open' ).stop().animate({
					height	: $item.data( 'originalHeight' ) + $content.outerHeight( true )
				}, this.options.speed, this.options.easing ), this._scroll( this ) )
		
		},
		// scrolls to current item or last opened item if current is -1
		_scroll				: function( instance ) {
			
			var instance	= instance || this, current;
			
			( instance.current !== -1 ) ? current = instance.current : current = instance.$el.find('li.st-open:last').index();
			
			$('html, body').stop().animate({
				scrollTop	: ( instance.options.oneOpenedItem ) ? instance.$items.eq( current ).data( 'offsetTop' ) : instance.$items.eq( current ).offset().top
			}, instance.options.scrollSpeed, instance.options.scrollEasing );
		
		}
	};
	
	var logError 				= function( message ) {
		
		if ( this.console ) {
			
			console.error( message );
			
		}
		
	};
	
	$.fn.accordion 				= function( options ) {
	
		if ( typeof options === 'string' ) {
		
			var args = Array.prototype.slice.call( arguments, 1 );

			this.each(function() {
			
				var instance = $.data( this, 'accordion' );
				
				if ( !instance ) {
					logError( "cannot call methods on accordion prior to initialization; " +
					"attempted to call method '" + options + "'" );
					return;
				}
				
				if ( !$.isFunction( instance[options] ) || options.charAt(0) === "_" ) {
					logError( "no such method '" + options + "' for accordion instance" );
					return;
				}
				
				instance[ options ].apply( instance, args );
			
			});
		
		} 
		else {
		
			this.each(function() {
				var instance = $.data( this, 'accordion' );
				if ( !instance ) {
					$.data( this, 'accordion', new $.Accordion( options, this ) );
				}
			});
		
		}
		
		return this;
		
	};
	
})( window, jQuery );