(function ($) {
    var settings = {
        scrollTimeout: 0, // milliseconds
        rowHeight: 30,
        hidePopoversContainer: null
    };

    var createMarkup = function ($this) {
        if (!$this) {
            throw '$this does not exist';
        }

        // if markup is already created
        if ($this.data('popupMenu')) {
            return;
        }
        var dropdownContainer = $this.find('.dropdown-menu').on('click', dropDownInsideClick);
        var chevron = $this.find('.dropdown-toggle').on('click', function () {
            if (!$this.hasClass('open') && !$this.data('popovers-inited'))
            {
                $this.data('popovers-inited', true);
                $this.find('.popover-warning').each(function () {
                    var $item = $(this);
                    initPopover($item);
                });
            }
            setDropDownPosition($this, $(this), dropdownContainer);
        });
        $this.data('popupMenu', true);

        return $this;
    };
    var setupWindow = function ($this) {
        if (!$this) {
            throw '$this does not exist';
        }
        if (!settings.hidePopoversContainer || settings.hidePopoversContainer.length <= 0) {
            return;
        }
        var popoverContainer = $('.' + settings.hidePopoversContainer);
        var menuClass = popoverContainer.data('menuclass');
        if (popoverContainer.length > 0) {
            var data = $(window).data('pm.scroll.src');
            if (!data)
                data = {};
            // add container if it is not specified yet
            if (!data[settings.hidePopoversContainer])
                data[settings.hidePopoversContainer] = {};
            // add menu class to scrolling container to identify which popovers to close
            data[settings.hidePopoversContainer][menuClass] = true;
            // store updated list of containers in data
            $(window).data('pm.scroll.src', data);
        }
        return $this;
    };
    var setupContainer = function ($this) {
        if (!$this) {
            throw '$this does not exist';
        }
        if (!settings.hidePopoversContainer || settings.hidePopoversContainer.length <= 0) {
            return;
        }
        var popoverContainer = $('.' + settings.hidePopoversContainer);
        var scrollContainerClass = popoverContainer.data('scrollcontainerclass');
        var menuClass = popoverContainer.data('menuclass');
        if (scrollContainerClass)
        {
            var scrollContainer = $('.' + scrollContainerClass);
            // store containers whose popups should be hidden on scrollContainer.scroll
            scrollContainer.each(function (i, obj) {
                var data = $(obj).data('pm.scroll.src');
                if (!data)
                    data = {};
                // add container if it is not specified yet
                if (!data[settings.hidePopoversContainer])
                    data[settings.hidePopoversContainer] = {};
                // add menu class to scrolling container to identify which popovers to close
                data[settings.hidePopoversContainer][menuClass] = true;
                // store updated list of containers in data
                $(obj).data('pm.scroll.src', data);
            });
            setupScrollEvent(scrollContainer);
        }
        // gather menuCssClasses
        var menuClasses = $(document).data('pm.click.menu') || {};
        menuClasses[menuClass] = true;
        $(document).data('pm.click.menu', menuClasses);
        // gather popupmenu  containers
        var containers = $(document).data('pm.click.container') || {};
        containers[settings.hidePopoversContainer] = true;
        $(document).data('pm.click.container', containers);

        return $this;
    };
    var setupWindowEvents = function () {
        setupScrollEvent(window);
        setupClickEvent(document);
    };
    function setupScrollEvent(obj) {
        $(obj).off('scroll.pm').on('scroll.pm', function () {
            if (settings.scrollTimeout > 0)
            {
                if ($(obj).data('scroll.pm.timeout')) {
                    clearTimeout($(obj).data('scroll.pm.timeout'));
                }
                $(obj).data('scroll.pm.timeout', setTimeout(onScroll, settings.scrollTimeout, obj));
            }
            else
                onScroll(obj);
        });
    };
    function setupClickEvent(obj) {
        $(obj).off('click.pm').on('click.pm', function () {
            onClick(obj);
        });
        $(document).off('hidden.bs.dropdown.pm').on('hidden.bs.dropdown.pm', function (e, obj) {
            $(e.target).find('a.popover-warning:data(bs.popover)').popover('destroy');
        });
    };
    var initPopover = function ($item) {
        if ($item.data('checklock-table') && $item.data('checklock-id') && $item.data('checklock-url'))
        {
            $item.on('click', function () {
                var tbl = $item.data('checklock-table');
                var id = $item.data('checklock-id');
                var url = $item.data('checklock-url');
                var openInNewTab = ($item.data('in-newtab') !== undefined);
                var backName = $item.data('checklock-backname');
                var query = $item.data('checklock-query');
                if (!URI)
                    throw 'Cannot find URI component declared in URIjs.js';
                if (CheckLock($item, tbl, id)) {
                    var currentUrl = document.location.pathname + document.location.search;
                    var navigateToUrl = URI(url);
                    if (url && url.length > 0) {
                        var urlId = navigateToUrl.query(true).id;
                        if (!urlId || urlId.length <= 0)
                            navigateToUrl = navigateToUrl.setQuery('id', id);
                    }
                    else
                        throw 'Cannot set target navigation URL';
                    navigateToUrl = navigateToUrl.setQuery('backUrl', currentUrl);
                    if (backName && (backName.length > 0))
                        navigateToUrl = navigateToUrl.setQuery("backName", encodeURIComponent(backName));
                    if (query && query.length > 0)
                        navigateToUrl = navigateToUrl.toString() + '&' + query;

                    if (openInNewTab) {
                    	window.open(navigateToUrl, '_blank');
                    }
                    else {
                    	document.location.href = navigateToUrl;
                    }
                }
            });
        }
    };
    var onChevronClick = function ($this) {
        $this.find('.modal').modal('show');
    };
    var setDropDownPosition = function (popupMenu, button, dropdown) {
        calcProps(button, dropdown, settings.rowHeight);
        var popoverContainer = popupMenu.closest('.' + settings.hidePopoversContainer);
        hideRedundantPopovers(popoverContainer, null);
    }
    function calcProps(button, dropdown, liHeight) {
        var rows = dropdown.find("li").length;
        if (rows > 3)
            rows = rows - 1;

        var menumax = rows * liHeight;
        if (rows >= 2)
            menumax = menumax + 25;
        dropdown.css('overflow', 'hidden');
        var curmaxheight = 300;
        var totalMaxheight = 400;
        var menumax_keep = menumax;
        var y = $(window.top).height();
        var bOffset = button.offset().top - window.pageYOffset;

        var y1 = bOffset + button.outerHeight();
        var dropDownLeft = button.offset().left - window.pageXOffset;
        var dropDownTop = bOffset + button.outerHeight();
        var sc1 = y - y1;

        if (curmaxheight + dropDownTop > window.innerHeight)
            sc1 = bOffset;

        if (menumax > sc1)
            menumax = (sc1 - 50);

        if (menumax > totalMaxheight)
            menumax = totalMaxheight;
        var direction = 'bottom';
        if (menumax + dropDownTop > window.innerHeight) {
            if (menumax_keep < menumax)
                dropDownTop = (bOffset - menumax_keep);
            else
                dropDownTop = (bOffset - menumax);
            direction = 'top'
        }

        if (menumax < menumax_keep) {
            var delta = menumax_keep - menumax
            if (delta > 25)
                dropdown.css('overflow', 'auto');
            if (curmaxheight > menumax) {
                menumax = curmaxheight;
            }
        }
        if (direction === 'top') {
            dropdown.css('max-height', menumax + "px");
            if (menumax < curmaxheight)
                menumaxdph = $(dropdown).outerHeight();
            dropDownTop = (bOffset - menumax);

        } else {
            dropdown.css('max-height', menumax + "px");
        }
        dropdown.css('position', 'fixed');
        dropdown.css('top', dropDownTop + "px");
        dropdown.css('left', dropDownLeft + "px");
        dropdown.css('z-index', '499');
        setDropDownHorizontalPosition(button, dropdown)
    }
    function setDropDownHorizontalPosition(button, dropdown) {
        var rows = dropdown.find("li").length;
        if (rows > 0) {
            var l = button.offset().left + $(button).parent().width();
            var w = $(dropdown).innerWidth();
            var docW = window.innerWidth;

            var isEntirelyVisible = (l + w <= docW);

            if (!isEntirelyVisible) {
                var totheright = l - w;
                dropdown.css('left', totheright + 'px');
            } else {

            }
        }
    }
    function dropDownInsideClick(event) {
        if (!event)
            event = window.event;

        var container = null, button = null;
        if ($(event.target).hasClass('dropdown-menu'))
            container = $(event.target);
        else {
            button = $(event.target);
            container = button.closest('.dropdown-menu');
        }
        hideRedundantPopovers(container, button);

        if (event.stopPropagation)
            event.stopPropagation();
        else
            window.event.cancelBubble = true;
    }
    function hideRedundantPopovers(container, currentBtn) {
        if (!container) {
            return;
        }

        var btn = null;
        if (currentBtn) {
            if (currentBtn.is('[data-toggle="popover"]'))
                btn = currentBtn;
            else
                btn = currentBtn.closest('[data-toggle="popover"]');
        }

        container.find('a.popover-warning:data(bs.popover)').not(btn).popover('destroy');
    }
    function onScroll(obj) {
        //var startDate = new Date().getTime();
        // get a list of containers to handle for the specified scrolling container
        var data = $(obj).data('pm.scroll.src');
        //console.log('window scroll.pm. data = ' + data);
        if (data) {
            $.each(data, function (key, item) {
                //console.log('window scroll.pm. data.each = ' + key + '; item.length' + item.length);
                var container = $('.' + key);
                if (item) {
                    $.each(item, function (menuClassKey, menuClassElem) {
                        //console.log('window scroll.pm. item.each = ' + menuClassKey);
                        container.find('.' + menuClassKey).removeClass('open');
                    });
                }
                hideRedundantPopovers(container, null);
            });
        }
        //var endDate = new Date().getTime();
        //console.log('hiding popup menus and popovers took: ' + (endDate - startDate) + ' ms');
    }
    function onClick(obj) {
        //var startDate = new Date().getTime();
        // get a list of containers to handle for the specified dom element
        var menus = $(obj).data('pm.click.menu');
        var containers = $(obj).data('pm.click.container');
        if (menus) {
            $.each(menus, function (key, item) {
                var menuItem = $('.' + key).removeClass('open');
            });
        }
        if (containers) {
            $.each(containers, function (key, item) {
                hideRedundantPopovers($('.' + key), null);
            });
        }
        //var endDate = new Date().getTime();
        //console.log('PM. document click took: ' + (endDate - startDate) + ' ms');
    }

    var methods = {
        init: function (options) {
            settings = $.extend(true, settings, options);
            this.each(function () {
                var $this = $(this);
                createMarkup($this);
                setupContainer($this);
                setupWindow($this);
            });
            setupWindowEvents();
        }
    };

    $.fn.popupMenu = function (options) {
        if (typeof options === 'string' && typeof methods[options] === 'function') {
            return methods[options].apply(this, Array.prototype.slice.call(arguments, 1));
        } else if (typeof options === 'object' || !options) {
            return methods.init.apply(this, arguments);
        }
    };
}(jQuery));