/*
* jquery.ui.potato.menu
* 
* Copyright (c) 2009 makoto_kw (makoto.kw@gmail.com)
* Dual licensed under the MIT and GPL licenses.
* 
* Version: 1.0
*/
(function($) {
    $.fn.extend({
        ptMenu: function(arg) {
            var defaltOption = {
                vertical: false,
                menuItemSelector: 'li',
                menuGroupSelector: 'ul',
                firstClass: 'potato-menu',
                menuItemClass: 'potato-menu-item',
                menuGroupClass: 'potato-menu-group',
                verticalClass: 'potato-menu-vertical',
                holizontalClass: 'potato-menu-holizontal',
                hasVerticalClass: 'potato-menu-has-vertical',
                hasHolizontalClass: 'potato-menu-has-holizontal',
                showDuration: 350,
                hideDuration: 100
            }

            var option = (typeof (arg) != 'string') ? $.extend(defaltOption, arg) : $.extend(defaltOption, {});
            var $menu = $(this).addClass(option.firstClass).addClass((option.vertical) ? option.verticalClass : option.holizontalClass);
            var $menuItems = $menu.find(option.menuItemSelector).addClass(option.menuItemClass);
            var $menuGroups = $menu.find(option.menuGroupSelector).addClass(option.menuGroupClass);
            $menuGroups.parent().each(function(index) {
                var bottom = $(this).parent(option.menuGroupSelector + '.' + option.firstClass).length == 1 && !option.vertical;
                var $menuGroup = $(this).addClass((bottom) ? option.hasVerticalClass : option.hasHolizontalClass)
					.children(option.menuGroupSelector + ':first').addClass(option.verticalClass)
                $(this)
					.hover(
						function(e) {
						    var offset = (bottom) ? { left: '0', top: ''} : { left: $(this).width() + 'px', top: '0' };
						    $menuGroup.css({ left: offset.left, top: offset.top }).fadeIn(option.showDuration);
						},
						function(e) {
						    $menuGroup.fadeOut(option.hideDuration);
						}
					)
				;
            });
            $menu.find('a[href^="#"]').click(function() {
                $menuGroups.fadeOut(option.hideDuration);
                return ($(this).attr('href') == '#') ? false : true;
            })
			;
            return this;
        }
    })
})(jQuery);