/**
* 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
* $('.YourUnorderedListClass').hoverAccordion({
*  speed: 'slow',
*  activateitem: '1',
*  active: 'current',
*  header: 'title',
*  hover: 'highlight',
*  opened: 'arrowdown',
*  closed: 'arrowup'
*  keepheight: 'true'
* });
*/
(function ($) {
    $.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
            itemwidth: '488px', // 'true': Set the height of each accordion item to the size of the largest one, 'false': Leave height as is
            emptywidth: '40px'
        }, 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();
                var oldelem = $(obj).parent().parent().children('li').children('a.opened').parent();

                // Change display status if not already open
                if (!newelem.children('a').is(".opened")) {
                    newelem.children('div').hide();
                    newelem.animate({
                        width: options.itemwidth
                    },
                    options.speed
                    ).children().show();
                    oldelem.animate({
                        width: options.emptywidth
                    },
                    options.speed
                    ).children('div').hide();

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

        var itemNo = 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) {
                // Change appearance of the header element of the active item
                thischild.children('li.' + options.active).parent().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);
        });

        return this;
    };
})(jQuery);