/*
* DC Vertical Mega Menu - jQuery vertical mega menu
* Copyright (c) 2011 Design Chemical
*
* Dual licensed under the MIT and GPL licenses:
* 	http://www.opensource.org/licenses/mit-license.php
* 	http://www.gnu.org/licenses/gpl.html
*
*/
(function ($) {

    //define the new for the plugin ans how to call it	
    $.fn.dcVerticalMegaMenu = function (options) {
        //set default options  
        var defaults = {
            classParent: 'dc-mega',
            arrow: true,
            classArrow: 'dc-mega-icon',
            classContainer: 'sub-container',
            classSubMenu: 'sub',
            classMega: 'mega',
            classSubParent: 'mega-hdr',
            classSubLink: 'mega-hdr',
            classRow: 'row',
            rowItems: 3,
            speed: 'fast',
            effect: 'show',
            direction: 'right'
        };

        //call in the default otions
        var options = $.extend(defaults, options);
        var $dcVerticalMegaMenuObj = this;

        //act upon the element that is passed into the design    
        return $dcVerticalMegaMenuObj.each(function (options) {

            $mega = $(this);
            if (defaults.direction == 'left') {
                $mega.addClass('left');
            } else {
                $mega.addClass('right');
            }
            // Get Menu Width
            var megaWidth = $mega.width();

            // Set up menu
            $('> li', $mega).each(function () {

                var $parent = $(this);
                var $megaSub = $('> ul', $parent);

                if ($megaSub.length > 0) {

                    $('> a', $parent).addClass(defaults.classParent).append('<span class="' + defaults.classArrow + '"></span>');
                    $megaSub.addClass(defaults.classSubMenu).wrap('<div class="' + defaults.classContainer + '" />');
                    var $container = $('.' + defaults.classContainer, $parent);

                    if ($('ul', $megaSub).length > 0) {

                        $parent.addClass(defaults.classParent + '-li');
                        $container.addClass(defaults.classMega);

                        // Set sub headers
                        $('> li', $megaSub).each(function () {
                            $(this).addClass('mega-unit');
                            if ($('> ul', this).length) {
                                $(this).addClass(defaults.classSubParent);
                                $('> a', this).addClass(defaults.classSubParent + '-a');
                            } else {
                                $(this).addClass(defaults.classSubLink);
                                $('> a', this).addClass(defaults.classSubLink + '-a');
                            }
                        });

                        // Create Rows
                        var hdrs = $('.mega-unit', $parent);
                        rowSize = parseInt(defaults.rowItems);
                        for (var i = 0; i < hdrs.length; i += rowSize) {
                            hdrs.slice(i, i + rowSize).wrapAll('<div class="' + defaults.classRow + '" />');
                        }

                        // Get mega dimensions
                        var itemWidth = $('.mega-unit', $megaSub).outerWidth(true);
                        var rowItems = $('.row:eq(0) .mega-unit', $megaSub).length;
                        var innerItemWidth = itemWidth * rowItems;
                        var totalItemWidth = innerItemWidth + containerPad;

                        // Set mega header height
                        $('.row', this).each(function () {
                            $('.mega-unit:last', this).addClass('last');
                            var maxValue = undefined;
                            $('.mega-unit > a', this).each(function () {
                                var val = parseInt($(this).height());
                                if (maxValue === undefined || maxValue < val) {
                                    maxValue = val;
                                }
                            });
                            $('.mega-unit > a', this).css('height', maxValue + 'px');
                            $(this).css('width', innerItemWidth + 'px');
                        });
                        var subWidth = $megaSub.outerWidth(true);
                        var totalWidth = $container.outerWidth(true);
                        var containerPad = totalWidth - subWidth;
                        // Calculate Row Height
                        $('.row', $megaSub).each(function () {
                            var rowHeight = $(this).height();
                            $(this).parent('.row').css('height', rowHeight + 'px');
                        });
                        $('.row:last', $megaSub).addClass('last');
                        $('.row:first', $megaSub).addClass('first');
                    } else {
                        $container.addClass('non-' + defaults.classMega);
                    }
                }

                var $container = $('.' + defaults.classContainer, $parent);
                // Get flyout height
                var subHeight = $container.height();
                var itemHeight = $parent.outerHeight(true);
                // Set position to top of parent
                $container.css({
                    height: subHeight + 'px',
                    marginTop: -itemHeight + 'px',
                    zIndex: '1000',
                    width: subWidth + 'px'
                }).hide();
            });

            // HoverIntent Configuration
            var config = {
                sensitivity: 175, // number = sensitivity threshold (must be 1 or higher)
                interval: 50, // number = milliseconds for onMouseOver polling interval
                over: megaOver, // function = onMouseOver callback (REQUIRED)
                timeout: 0, // number = milliseconds delay before onMouseOut
                out: megaOut // function = onMouseOut callback (REQUIRED)
            };

            $('li', $dcVerticalMegaMenuObj).hoverIntent(config);

            function megaOver() {
                $(this).addClass('mega-hover');
                $(this).addClass('dc-mega');

                var $link = $('> a', this);
                var $subNav = $('.sub', this);
                var $container = $('.sub-container', this);
                var width = $container.width();
                var outerHeight = $container.outerHeight();
                var height = $container.height();
                var itemHeight = $(this).outerHeight(true);
                var offset = $link.offset();
                var scrollTop = $(window).scrollTop();
                var offset = offset.top - scrollTop
                var bodyHeight = $(window).height();
                var maxHeight = bodyHeight - offset;
                var xsHeight = maxHeight - outerHeight;

                if (xsHeight < 0) {
                    var containerMargin = xsHeight - itemHeight;
                    $container.css({ marginTop: containerMargin + 'px' });
                }

                var containerPosition = { right: megaWidth };
                if (defaults.direction == 'right') {
                    containerPosition = { left: megaWidth };
                }

                if (defaults.effect == 'fade') {
                    $container.css(containerPosition).fadeIn(defaults.speed);
                }
                if (defaults.effect == 'show') {
                    $container.css(containerPosition).show();
                }
                if (defaults.effect == 'slide') {
                    $container.css({
                        width: 0,
                        height: 0,
                        opacity: 0
                    });

                    if (defaults.direction == 'right') {

                        $container.show().css({
                            left: megaWidth
                        });
                    } else {

                        $container.show().css({
                            right: megaWidth
                        });
                    }
                    $container.animate({
                        width: width,
                        height: height,
                        opacity: 1
                    }, defaults.speed);
                }
            }

            function megaOut() {
               $(this).removeClass('mega-hover');
                var $container = $('.sub-container', this);
                $container.hide();
            }
        });
    };
})(jQuery);