/**
    Project: CheckTree jQuery Plugin
    Version: 0.3 (porkchop)
    Project Website: http://jquery-checktree.googlecode.com/
    Author: JJ Geewax <jj@geewax.org>
    
    License:
        The CheckTree jQuery plugin is currently available for use in all personal or 
        commercial projects under both MIT and GPL licenses. This means that you can choose 
        the license that best suits your project and use it accordingly.
*/
(function(jQuery) {
jQuery.fn.checkTree = function(settings) {
    
    settings = jQuery.extend({
        /* Callbacks
            The callbacks should be functions that take one argument. The checkbox tree
            will return the jQuery wrapped LI element of the item that was checked/expanded.
        */
        onExpand: null,
        onCollapse: null,
        onCheck: null,
        onUnCheck: null,
        onHalfCheck: null,
        onLabelHoverOver: null,
        onLabelHoverOut: null,
        
        /* Valid choices: 'expand', 'check' */
        labelAction: "expand",
        
        // Debug (currently does nothing)
        debug: false
    }, settings);
    
    var $tree = jQuery("ul.tree");
	var $lis = $tree.find('li');
	var $checkboxes = $lis.find(":checkbox");
	
	// Hide all checkbox inputs
    $checkboxes.css('display', 'none');
	
	$lis.not(':has(.arrow)').each(function() {
		// This little piece here is by far the slowest.
		jQuery(this).prepend('<div class="arrow"></div><div class="checkbox"></div>');
	});
	
	// Hide all sub-trees
	$tree.find('li > ul').css('display', 'none');
	
	/*
	What to do when the arrow is clicked
	Tried:
	 - $lis.filter(':has(li)').find(' > .arrow')
	 - $lis.filter(':has(li)').find('.arrow')
	 - $tree.find('li:has(li) .arrow')
	 - $tree.find('li:has(li) > .arrow') <- This was the fastest.
	*/
	$tree.find('li:has(li) > .arrow')
		.click(function() {
			
			
			
			
			
			
			var $this = jQuery(this);
			$this
				.toggleClass('expanded')
				.toggleClass('collapsed')
				.siblings("ul:first")
					.toggle()
			;
			
			
			var liElements = $("ul.tree").children("li");
			var ulListing;
			
			
			//alert(liElements.length);
			
			
			//alert("aktualny: " + $this.parent().find("ul").find("span").html());
			
			jQuery.each(liElements, function(i, element) {
			    
				
				ulListing = $(element).find("ul");
				
				
				if ( ulListing.find(".checked").length == 0 )
				{
					
					if ( $this.parent().find("ul").html() != ulListing.html() ) {
						
						//alert("1: " + $this.parent().find("ul").html());
						//alert("2: " + $(ulListing).html());
						
						$(ulListing).css("display", "none");
					}
					
					
					//alert($(ulListing).css("display"));
					
				}
					
			});

			
			
			
			// Handle callbacks
			if (settings.onExpand && $this.hasClass('expanded')) {
				settings.onExpand($this.parent());
			}
			else if (settings.onCollapse && $this.hasClass('collapsed')){
				settings.onCollapse($this.parent());
			}
		})
		.addClass('collapsed')
	;
	
	/*
	What to do when the checkbox is clicked
	*/
	
	function checkboxClick() {
	

		//alert('x');
		
		var $this = jQuery(this);
			
			//alert($(this).parent("li").find('.specBox').html());
			
			//alert('click');
				
			var myArray = [];
			
			if ( !myArray.exists ( $this.parent("li").parent("ul").parent("li").find("input").val() ) )
			myArray[ myArray.length ] = $this.parent("li").parent("ul").parent("li").find("input").val();
		
			var zaznaczoneBranze = $('input[name=zaznaczoneBranze\[\]]:checked');
			jQuery.each(zaznaczoneBranze, function(i, val) {
				
				//alert(  $(val).parent("li").parent("ul").parent("li").find("input").val() );
				
				if ( !myArray.exists ( $(val).parent("li").parent("ul").parent("li").find("input").val() ) )
				myArray[ myArray.length ] = $(val).parent("li").parent("ul").parent("li").find("input").val();
				
			});
		
			if ( myArray.length > 5 ) {
				
				//alert i odznacz
				jAlert('Możesz zaznaczyć kategorię maksymalnie w 5-ciu branżach głównych!', 'Formularz rejestracji');
				
			}
			else
			{
				
				$this
				.toggleClass('checked')
				.removeClass('half_checked')
				.siblings(':checkbox:first').attr('checked', $this.hasClass('checked') ? 'checked' : '')
			
				
				if ($this.hasClass('checked')) {
				$(this).parent("li").find('.specBox').show();
				}
				else {
					$(this).parent("li").find('.specBox').hide();
				}
				
			}
			
			
			
			
			//$(this).parent("div").$('.specBox').show();
		;
		
		$this.filter('.checked').siblings('ul:first').find('.checkbox:not(.checked)')
			.removeClass('half_checked')
			.addClass('checked')
			.siblings(':checkbox').attr('checked', 'checked')
		;
		$this.filter(':not(.checked)').siblings('ul:first').find('.checkbox.checked')
			.removeClass('checked half_checked')
			.siblings(':checkbox').attr('checked', '')
			
		;
		
		// Send a change event to our parent checkbox:
		$this.parents("ul:first").siblings(":checkbox:first").change();
		
		// Handle callbacks
		if (settings.onCheck && $this.hasClass('checked')) {
			
			settings.onCheck($this.parent());
			
			
		}
		else if (settings.onUnCheck && $this.hasClass('checked') == false) {
			settings.onUnCheck($this.parent());
		}
		
		
		
	}
		
	
	$tree.find('.checkbox').click( checkboxClick );
	
	/*
	What to do when a checkbox gets a change event
	(Fired when the children of this checkbox have changed)
	*/
	$checkboxes.change(function() {
		// If all the children are checked, this should be checked:
		var $this = jQuery(this);
		var $checkbox = $this.siblings('.checkbox:first');
		var any_checked = $this.siblings('ul:first').find(':checkbox:checked:first').length == 1;
		var any_unchecked = $this.siblings('ul:first').find(':checkbox:not(:checked):first').length == 1;
		
		
		
		
	});
	
	/*
	What to do when a label is hovered or clicked
	*/
	$tree.find('label')
		.click(function() {
			switch(settings.labelAction) {
				case 'expand':
					jQuery(this).siblings('.arrow:first').click();
					
					
					break;
				case 'check':
					jQuery(this).siblings('.checkbox:first').click();
					break;
			}
		})
		
		.hover(
			function() {
				jQuery(this).addClass("hover");
				if (settings.onLabelHoverOver) {
					settings.onLabelHoverOver(jQuery(this).parent());
				}
			},
			function() {
				jQuery(this).removeClass("hover");
				if (settings.onLabelHoverOut) {
					settings.onLabelHoverOut(jQuery(this).parent());
				}
			}
		)
	;
	
	/*
	Extra convenience methods
	*/
	$tree.clear = function() {
		$tree.find('.checkbox')
			.removeClass('checked')
			.siblings(':checkbox').attr('checked', '')
		;
	};
	
	$tree.checkAll = function() {
		$tree.find('.checkbox')
			.addClass('checked')
			.siblings(':checkbox').attr('checked', 'true')
		;
	};
	
};
})(jQuery);