/**
 * @copyright	Copyright (C) 2005 - 2014 Open Source Matters, Inc. All rights reserved.
 * @license		GNU General Public License version 2 or later; see LICENSE.txt
 */

/**
 * JavaScript behavior to add front-end hover edit icons with tooltips for modules and menu items.
 *
 */
(function($) {

	$.fn.extend({
		/**
		 * This jQuery custom method makes the elements absolute, and with true argument moves them to end of body to avoid CSS inheritence
		 *
		 * @param   rebase boolean
		 * @returns {jQuery}
		 */
		jEditMakeAbsolute: function(rebase) {

			return this.each(function() {

				var el = $(this);
				var pos;

				if (rebase) {
					pos = el.offset();
				} else {
					pos = el.position();
				}

				el.css({ position: "absolute",
					marginLeft: 0, marginTop: 0,
					top: pos.top, left: pos.left,
					width: el.width(), height: el.height()
				});

				if (rebase) {
					el.detach().appendTo("body");
				}
			});

		}
	});

	$(document).ready(function () {

		// Tooltip maximal dimensions for intelligent placement:
		var actualWidth = 200;
		var actualHeight = 100;
		// Tooltip smart tooltip placement function:
		var tooltipPlacer = function(tip, element) {
			var $element, above, below, boundBottom, boundLeft, boundRight, boundTop, elementAbove, elementBelow, elementLeft, elementRight, isWithinBounds, left, pos, right;
			isWithinBounds = function(elementPosition) {
				return boundTop < elementPosition.top && boundLeft < elementPosition.left && boundRight > (elementPosition.left + actualWidth) && boundBottom > (elementPosition.top + actualHeight);
			};
			$element = $(element);
			pos = $.extend({}, $element.offset(), {
				width: element.offsetWidth,
				height: element.offsetHeight
			});
			boundTop = $(document).scrollTop();
			boundLeft = $(document).scrollLeft();
			boundRight = boundLeft + $(window).width();
			boundBottom = boundTop + $(window).height();
			elementAbove = {
				top: pos.top - actualHeight,
				left: pos.left + pos.width / 2 - actualWidth / 2
			};
			elementBelow = {
				top: pos.top + pos.height,
				left: pos.left + pos.width / 2 - actualWidth / 2
			};
			elementLeft = {
				top: pos.top + pos.height / 2 - actualHeight / 2,
				left: pos.left - actualWidth
			};
			elementRight = {
				top: pos.top + pos.height / 2 - actualHeight / 2,
				left: pos.left + pos.width
			};
			above = isWithinBounds(elementAbove);
			below = isWithinBounds(elementBelow);
			left = isWithinBounds(elementLeft);
			right = isWithinBounds(elementRight);
			if (above) {
				return "top";
			} else {
				if (below) {
					return "bottom";
				} else {
					if (left) {
						return "left";
					} else {
						if (right) {
							return "right";
						} else {
							return "right";
						}
					}
				}
			}
		};

		// Modules edit icons:

		$('.jmoddiv').on({
			mouseenter: function() {

				// Get module editing URL and tooltip for module edit:
				var moduleEditUrl = $(this).data('jmodediturl');
				var moduleTip = $(this).data('jmodtip');

				// Stop timeout on previous tooltip and remove it:
				$('body>.btn.jmodedit').clearQueue().tooltip('destroy').remove();

				// Add editing button with tooltip:
				$(this).addClass('jmodinside')
					.prepend('<a class="btn jmodedit" href="#" target="_blank"><span class="icon-edit"></span></a>')
					.children(":first").attr('href', moduleEditUrl).attr('title', moduleTip)
					.tooltip({"container": false, placement: tooltipPlacer})
					.jEditMakeAbsolute(true);
				// This class was needed for positioning the icon before making it absolute at bottom of body: We can now remove it:
				$(this).removeClass('jmodinside');

				$('.btn.jmodedit')
					.on({
						mouseenter: function() {
							// Stop delayed removal programmed by mouseleave of .jmoddiv or of this one:
							$(this).clearQueue();
						},
						mouseleave: function() {
							// Delay remove editing button if not hovering it:
							$(this).delay(500).queue(function(next) {
								$(this).tooltip('destroy').remove();
								next();
							});
						}
					});
			},
			mouseleave: function() {

				// Delay remove editing button if not hovering it:
				$('body>.btn.jmodedit').delay(500).queue(function(next) {
					$(this).tooltip('destroy').remove();
					next();
				});
			}
		});

		// Menu items edit icons:

		var activePopover = null;

		$('.jmoddiv[data-jmenuedittip] .nav li,.jmoddiv[data-jmenuedittip].nav li,.jmoddiv[data-jmenuedittip] .nav .nav-child li,.jmoddiv[data-jmenuedittip].nav .nav-child li').on({
			mouseenter: function() {

				// Get menu ItemId from the item-nnn class of the li element of the menu:
				var itemids = /\bitem-(\d+)\b/.exec($(this).attr('class'));
				if (typeof itemids[1] == 'string') {
					// Find module editing URL from enclosing module:
					var enclosingModuleDiv = $(this).closest('.jmoddiv');
					var moduleEditUrl = enclosingModuleDiv.data('jmodediturl');
					// Transform module editing URL into Menu Item editing url:
					var menuitemEditUrl = moduleEditUrl.replace(/\/index.php\?option=com_modules&view=module([^\d]+)\d+$/, '/index.php?option=com_menus&view=item$1' + itemids[1]);

				}

				// Get tooltip for menu items from enclosing module
				var menuEditTip = enclosingModuleDiv.data('jmenuedittip').replace('%s', itemids[1]);

				var content = $('<div><a class="btn jfedit-menu" href="#" target="_blank"><span class="icon-edit"></span></a></div>');
				content.children('a.jfedit-menu').prop('href', menuitemEditUrl).prop('title', menuEditTip);

				if (activePopover) {
					$(activePopover).popover('hide');
				}
				$(this).popover({html:true, content:content.html(), container:'body', trigger:'manual', animation:false, placement: 'bottom'}).popover('show');
				activePopover = this;

				$('body>div.popover')
					.on({
					mouseenter: function() {
						if (activePopover) {
							$(activePopover).clearQueue();
						}
					},
					mouseleave: function() {
						if (activePopover) {
							$(activePopover).popover('hide');
						}
					}
				})
				.find('a.jfedit-menu').tooltip({"container": false, placement: 'bottom'});
			},
			mouseleave: function() {
				$(this).delay(1500).queue(function(next) { $(this).popover('hide'); next() });
			}
		});
	});
})(jQuery);
