/*
 +-------------------------------------------------------------------------+
 | Copyright (C) 2004-2013 The Cacti Group                                 |
 |                                                                         |
 | This program is free software; you can redistribute it and/or           |
 | modify it under the terms of the GNU General Public License             |
 | as published by the Free Software Foundation; either version 2          |
 | of the License, or (at your option) any later version.                  |
 |                                                                         |
 | This program is distributed in the hope that it will be useful,         |
 | but WITHOUT ANY WARRANTY; without even the implied warranty of          |
 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the           |
 | GNU General Public License for more details.                            |
 +-------------------------------------------------------------------------+
 | Cacti: The Complete RRDTool-based Graphing Solution                     |
 +-------------------------------------------------------------------------+
 | This code is designed, written, and maintained by the Cacti Group. See  |
 | about.php and/or the AUTHORS file for specific developer information.   |
 +-------------------------------------------------------------------------+
 | http://www.cacti.net/                                                   |
 +-------------------------------------------------------------------------+
*/

(function($){
 $.fn.DropDownMenu = function(options) {

	var defaults = {
		title: 			false,
		subtitle: 		false,
		name: 			'myName',
		maxHeight: 		300,
		width: 			'auto',
		timeout: 		500,
		auto_close: 	10000,
		html: 			'<h6>empty</h6>',
		offsetX: 		0,
		offsetY: 		0,
		simultaneous: 	false,
		textAlign:		'left'
	};

	var timerref 		= null;
	var menu 			= null;
	var menuHeight 		= 0;
	var options 		= $.extend(defaults, options);
	var contentHeight	= 0;

	/* do nothing if requested menu is still loaded */
	if($('#' + options.name).is(":visible")) { return; }

	/* remove all open menus from DOM if they should not stay in front at the same time */
	var oldMenus = $(".cacti_dd_menu");
	if(options.simultaneous == false) {
		oldMenus.css({'overflow-y':'hidden'}).slideUp('200');
		oldMenus.queue(function () {
			oldMenus.remove();
			oldMenus.dequeue();
		});
	}

	return this.each(function() {
		obj = $(this);
		newMenu = _init_menu(obj);
		_open_menu(newMenu);
	});

	function _init_menu(initiator){
		/* create the main menu structure */
		$("<div id='" + options.name + "' style='display: none;' class='cacti_dd_menu ui-widget ui-corner-all'>"
			+ "<div id='" + options.name + "_title' class='title ui-state-default ui-corner-top'><h6>" + options.title + "</h6></div>"
			+ "<div id='" + options.name + "_back' class='back ui-state-active'></div>"
			+ "<div id='" + options.name + "_content' class='content ui-widget-content ui-state-highlight " + ((options.subtitle !== false) ? "" : "ui-corner-bottom" ) + "'></div>"
			+ "<div id='" + options.name + "_subtitle' class='subtitle ui-state-default ui-corner-bottom'><h6>" + options.subtitle + "</h6></div>"
			+ "<div id='" + options.name + "_html' class='html'></div>"
		+ "</div>").appendTo("body");

		/* define references to the menu and its different sections */
		menu 			= $('#' + options.name);
		menu_head 		= $('#' + options.name + '_title');
		menu_content 	= $('#' + options.name + '_content');
		menu_back 		= $('#' + options.name + '_back');
		menu_subhead 	= $('#' + options.name + '_subtitle');
		menu_html 		= $('#' + options.name + '_html');

		/* while div container "myName_html" holds the raw data ... */
		menu_html.append(options.html);
		i=1;
		menu_html.find("h6:has(div)").each(function() {
			var subMenu = $(this);
			var subMenuClass = options.name + '_' + i;
			var subMenuTitle = subMenu.find('a:first').html();
			subMenu.addClass(subMenuClass);
			$('.'+subMenuClass).die().live("click", function(){ _switch_layer( subMenuClass); } );
			subMenu.children("div").hide();
			subMenu.find('a:first').html('<span style="float:left; min-width:80%;">' + subMenuTitle + '</span><span class="ui-icon ui-icon-triangle-1-e" style="float:right;"></span>');
			i++;
		});

		/* ... "myName_content" will have the visible menu data */
		menu_content.append(menu_html.html());

		/* if necessary show title, subtitle ... */
		if(options.title 	!== false) { menu_head.show(); }
		if(options.subtitle !== false) { menu_subhead.show(); }

		/* make content visible */
		menu_content.show();

		/* reduce height to a minimum for best fit */
		menuHeight = (menu.outerHeight() > options.maxHeight) ? options.maxHeight : menu.outerHeight();

		/* set the width to a fixed value */
		if(!isNaN(parseInt(options.width))) {
			menu.css({
				'min-width' : options.width + 'px',
				'max-width' : options.width + 'px'
			});
			menu.width(options.width);
		}else {
			// use real width plus 15 percent
			var width = menu.outerWidth(true)*1.15;
			menu.css({
				'min-width' : width + 'px',
				'max-width' : width + 'px'
			});
			menu.width(width);
		}

		/* default position of the menu container */
		menu.css({
			// x-position in relation to the initiator
			'left'	: initiator.offset().left + options.offsetX + 'px',
			// y-position in relation to the initiator
			'top' 	: initiator.offset().top + initiator.height() + options.offsetY + 'px'
		});

		/* change the orientation from right to left if width exceeds the windows size */
		if((initiator.offset().left + initiator.width() + options.offsetX + menu.outerWidth(true)) > $(window).width()) {
			menu.css({'left' : (initiator.offset().left + initiator.width() - menu.outerWidth(true)) + 'px'});
		}

		menu.css({'height':0, 'text-align':options.textAlign});
		menu.bind('mouseover', _cancel_timer);
		menu.bind('mouseout', _set_timer);
		return menu;
	}


	function _switch_layer(subMenuClass){
		if(subMenuClass == null) {
			var content = menu_html;
			menu_back.empty().hide();
			menu_content.height(contentHeight);
		}else {
			var content = menu_html.find('.' + subMenuClass + ' div:first');
			menu_back.show();
		}

		parentClass = menu_html.find('.' + subMenuClass).parents('h6').attr('class');

		menu_back.empty().append( menu_html.find('.' + subMenuClass + ' a:first').html() );
		menu_back.find('span:last').removeClass('ui-icon-triangle-1-e').addClass('ui-icon-triangle-1-s');
		menu_back.unbind('click').click( function() { _switch_layer( parentClass); });

		menu_content.empty().append(content.html());

		/* re-calculate content height */
		if(subMenuClass != null) {
				menu_head_height	= menu_head.is(":visible")		? menu_head.outerHeight()		: 0;
				menu_back_height	= menu_back.is(":visible")		? menu_back.outerHeight()		: 0;
				menu_subhead_height	= menu_subhead.is(":visible")	? menu_subhead.outerHeight()	: 0;

				menu_content.height(menuHeight - menu_head_height - menu_back_height - menu_subhead_height);
		}

		/* return false to suppress unwanted click events*/
		return false;
	}

	function _set_timer(timer){
			timer = ( typeof(timer) != 'number' ) ? options.timeout : timer;
			timerref = window.setTimeout( _close_menu, timer);
	}

	function _cancel_timer() {
		if(timerref) {
			window.clearTimeout(timerref);
			timerref = null;
		}
	}

	function _close_menu(){
		menu = $('#' + options.name);
		menu.slideUp(menuHeight*3);
		menu.queue(function () {
			menu.remove();
			menu.dequeue();
		});
	}

	function _open_menu(obj){
		//wait until oldMenu is completey closed before opening a new one
		var wait = setInterval(function() {
			if( !oldMenus.is(":animated") ) {
				clearInterval(wait);
				obj.show().animate({height: menuHeight}, menuHeight*3);

				//setup contentHeight;
				menu_head_height	= menu_head.is(":visible")		? menu_head.outerHeight()		: 0;
				menu_back_height	= menu_back.is(":visible")		? menu_back.outerHeight()		: 0;
				menu_subhead_height	= menu_subhead.is(":visible")	? menu_subhead.outerHeight()	: 0;

				menu_content.height(menuHeight - menu_head_height - menu_back_height - menu_subhead_height);

				contentHeight = $('#' + options.name + '_content').height();
				$('#' + options.name + '_content').css({'overflow-y':'auto'});

				obj.find('h6').eq(0).focus();
				if(options.auto_close !== false) {
					_set_timer(options.auto_close);
				}
			}
		}, 200);
	}

 };
})(jQuery);