/**
* HoverAccordion - jQuery plugin for intuitively opening accordions and menus
* http://berndmatzner.de/jquery/hoveraccordion/
* Copyright (c) 2008 Bernd Matzner
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
* Requires jQuery 1.2.1 or higher
* Version: 0.5.0
*
* Usage:
* $('#YourUnorderedListID').hoverAccordion();
* or
* $('.YourUnorderedListClass').hoverAccordion({
*  speed: 'slow',
*  activateitem: '1',
*  active: 'current',
*  header: 'title',
*  hover: 'highlight',
*  opened: 'arrowdown',
*  closed: 'arrowup'
*  keepheight: 'true'
*  height: '0'
* });
*/
(function($)
{
    $.fn.hoverAccordion = function(options)
    {
        // Setup options
        options = jQuery.extend({
            speed: 'fast', // Speed at which the subitems open up - valid options are: slow, normal, fast
            activateitem: 'true', // 'true': Automatically activate items with links corresponding to the current page, '2': Activate item #2
            active: 'active', // Class name of the initially active element
            header: 'header', // Class name for header items
            hover: 'hover', // Class name for hover effect
            opened: 'opened', // Class name for open header items
            closed: 'closed', // Class name for closed header items
            keepheight: 'true', // 'true': Set the height of each accordion item to the size of the largest one, 'false': Leave height as is
            height: 'false'
        }, options);

        // Current hover status
        var thislist = this;

        // Current URL
        var thisurl = window.location.href;

        // Interval for detecting intended element activation
        var i = 0;

        // Change display status of subitems when hovering
        function doHover(obj)
        {
            if ($(obj).html() == undefined)
                obj = this;

            // Change only one display status at a time
            if (!thislist.is(':animated'))
            {
                var newelem = $(obj).parent().children('div');
                var oldelem = $(obj).parent().parent().children('li').children('div:visible');
                if (options.keepheight == 'true')
                {
                    if (maxheight == 0)
                    {
                        $(thislist).children('li').each(function()
                        {
                            var thisitem = $(this);
                            var thischild = thisitem.children('div');
                            // Initialize subitems
                            if (thischild.length > 0)
                            {
                                if (maxheight < thischild.height())
                                    maxheight = thischild.height();
                            }
                        });
                    }
                    thisheight = maxheight;
                }
                else
                {
                    thisheight = newelem.height();
                }


                // Change display status if not already open
                if (!newelem.is(':visible'))
                {
                    newelem.children().hide();
                    newelem.animate({
                        height: thisheight
                    }, {
                        step: function(n, fx)
                        {
                            newelem.height(thisheight - n);
                        },
                        duration: options.speed
                    }).children().show();

                    oldelem.animate({
                        height: 'hide'
                    }, {
                        step: function(n, fx)
                        {
                            newelem.height(thisheight - n);
                        },
                        duration: options.speed
                    }).children().hide();

                    // Switch classes for headers
                    oldelem.parent().children('a').addClass(options.closed).removeClass(options.opened);
                    newelem.parent().children('a').addClass(options.opened).removeClass(options.closed);

                }

            }
        };

        var itemNo = 0;
        var maxheight = 0;

        // Setup initial state and hover events
        $(this).children('li').each(function()
        {
            var thisitem = $(this);

            itemNo++;

            // Set current link to current URL to 'active' and disable anchor links
            var thislink = thisitem.children('a');

            if (thislink.length > 0)
            {
                // Hover effect for all links

                thislink.hover(function()
                {
                    $(this).addClass(options.hover);
                }, function()
                {
                    $(this).removeClass(options.hover);
                });


                var thishref = thislink.attr('href');

                if (thishref == '#')
                {
                    // Add a click event if the header does not contain a link
                    thislink.click(function()
                    {
                        doHover(this);
                        this.blur();
                        return false;
                    });
                }
                else
                    if (options.activateitem == 'true' && thisurl.indexOf(thishref) > 0 && thisurl.length - thisurl.lastIndexOf(thishref) == thishref.length)
                {
                    thislink.parent().addClass(options.active);
                }
            }

            var thischild = thisitem.children('div');
            // Initialize subitems
            if (thischild.length > 0)
            {
                if (maxheight < thischild.height())
                    maxheight = thischild.height();

                // Change appearance of the header element of the active item
                //thischild.parent().children('a').addClass(options.header);

                // Bind hover events to all subitems
                thislink.hover(function()
                {
                    var t = this;
                    i = setInterval(function()
                    {
                        doHover(t);
                        clearInterval(i);
                    }, 400);


                }, function()
                {
                    clearInterval(i);
                });


                // Set current link to current URL to 'active'
                if (options.activateitem == 'true')
                {
                    thischild.children('li').each(function()
                    {
                        var m = $(this).children('a').attr('href');
                        if (m)
                        {
                            if (thisurl.indexOf(m) > 0 && thisurl.length - thisurl.lastIndexOf(m) == m.length)
                            {
                                $(this).addClass(options.active).parent().parent().children('a').addClass(options.opened);
                            }
                        }
                    });
                }
                else
                    if (parseInt(options.activateitem) == itemNo)
                {
                    thisitem.addClass(options.active).children('a').addClass(options.opened);
                }
            }

            // Close all subitems except for those with active items
            thischild.not($(this).parent().children('li.' + options.active).children('div')).not(thischild.children('li.' + options.active).parent()).hide().parent().children('a').addClass(options.closed);
        });


        if (options.height != 'false')
        {
            if (itemNo > 0)
            {

                // $(this).height($(options.height).height());
                var panelheight = $(this).height();
                var titleheight = $(this).children('li').children('a').height();

                maxheight = panelheight - titleheight * itemNo;


                if (maxheight < 200)
                {
                    maxheight = 200;
                    panelheight = maxheight + titleheight * itemNo;
                    // $(this).height(panelheight);
                }
            }
            $(this).children('li.' + options.active).children('div').height(maxheight);
        }
        return this;
    };
})(jQuery);