; (function ($, window, document, undefined) {

    $.navigation = function (element, options) {

        var defaults = {
            responsive: true,
            mobileBreakpoint: 767,
            showDuration: 300,
            hideDuration: 300,
            showDelayDuration: 0,
            hideDelayDuration: 0,
            submenuTrigger: "hover",
            effect: "fade",
            submenuIndicator: true,
            submenuIndicatorTrigger: false,
            hideSubWhenGoOut: true,
            visibleSubmenusOnMobile: false,
            overlay: true,
            overlayColor: "rgba(0, 0, 0, 0.7)",
            hidden: false,
            hiddenOnMobile: false,
            offCanvasSide: "left",
            offCanvasCloseButton: true,
            animationOnShow: "",
            animationOnHide: "",
            hideScrollBar: true,
            onInit: function () { },
            onLandscape: function () { },
            onPortrait: function () { },
            onShowOffCanvas: function () { },
            onHideOffCanvas: function () { }
        };

        var plugin = this,
            bigScreenFlag = Number.MAX_VALUE,
            smallScreenFlag = 1,
            clickTouchEvents = "click.nav touchstart.nav",
            hoverShowEvents = "mouseenter focusin",
            hoverHideEvents = "mouseleave focusout";
        plugin.settings = {};
        var $element = $(element), element = element;

        if ($(element).find(".nav-search").length > 0) {
            $(element).find(".nav-search").find("form").prepend("<span class='nav-search-close-button' tabindex='0'>&#10005;</span>");
        }

        plugin.init = function () {
            plugin.settings = $.extend({}, defaults, options);

            if (plugin.settings.offCanvasCloseButton) {
                $(element).find(".nav-menus-wrapper").prepend("<span class='nav-menus-wrapper-close-button'>&#10005;</span>");
            }

            if (plugin.settings.offCanvasSide == "right") {
                $(element).find(".nav-menus-wrapper").addClass("nav-menus-wrapper-right");
            }

            if (plugin.settings.hidden) {
                $(element).addClass("navigation-hidden");
                plugin.settings.mobileBreakpoint = 99999;
            }

            checkSubmenus();

            $(element).find(".nav-toggle").on("click touchstart", function (e) {
                e.stopPropagation();
                e.preventDefault();
                plugin.showOffcanvas();
                if (options !== undefined) {
                    plugin.callback("onShowOffCanvas");
                }
            });

            $(element).find(".nav-menus-wrapper-close-button").on("click touchstart", function () {
                plugin.hideOffcanvas();
                if (options !== undefined) {
                    plugin.callback("onHideOffCanvas");
                }
            });

            $(element).find(".nav-search-button, .nav-search-close-button").on("click touchstart keydown", function (e) {
                e.stopPropagation();
                e.preventDefault();
                var code = e.keyCode || e.which;
                if (e.type === "click" || e.type === "touchstart" || (e.type === "keydown" && code == 13)) {
                    plugin.toggleSearch();
                }
                else {
                    if (code == 9) {
                        $(e.target).blur();
                    }
                }
            });

            $(window).resize(function () {
                plugin.initNavigationMode(windowWidth());
                fixSubmenuRightPosition();
                if (plugin.settings.hiddenOnMobile) {
                    hideNavbarPortrait();
                }
            });

            plugin.initNavigationMode(windowWidth());

            if (plugin.settings.hiddenOnMobile) {
                hideNavbarPortrait();
            }

            if (plugin.settings.overlay) {
                $(element).append("<div class='nav-overlay-panel'></div>");
            }

            if ($(element).find(".megamenu-tabs").length > 0) {
                activateTabs();
            }

            if (options !== undefined) {
                plugin.callback("onInit");
            }
        };

        // reset submenus
        var resetSubmenus = function () {
            $(element).find(".nav-submenu").hide(0);
            $(element).find("li").removeClass("focus");
        };

        // check the existence of submenus/add indicators to them
        var checkSubmenus = function () {
            $(element).find("li").each(function () {
                if ($(this).children(".nav-dropdown,.megamenu-panel").length > 0) {
                    $(this).children(".nav-dropdown,.megamenu-panel").addClass("nav-submenu");
                    if (plugin.settings.submenuIndicator) {
                        $(this).children("a").append(
                            "<span class='submenu-indicator'>" +
                            "<span class='submenu-indicator-chevron'></span>" +
                            "</span>"
                        );
                    }
                }
            });
        };

        //hide navbar on portrait mode
        var hideNavbarPortrait = function () {
            if ($(element).hasClass("navigation-portrait")) {
                $(element).addClass("navigation-hidden");
            }
            else {
                $(element).removeClass("navigation-hidden");
            }
        };

        // show a submenu
        plugin.showSubmenu = function (parentItem, submenuEffect) {
            if (windowWidth() > plugin.settings.mobileBreakpoint) {
                $(element).find(".nav-search").find("form").fadeOut();
            }
            if (submenuEffect == "fade") {
                $(parentItem).children(".nav-submenu")
                    .stop(true, true)
                    .delay(plugin.settings.showDelayDuration)
                    .fadeIn(plugin.settings.showDuration)
                    .removeClass(plugin.settings.animationOnHide)
                    .addClass(plugin.settings.animationOnShow);
            }
            else {
                $(parentItem).children(".nav-submenu")
                    .stop(true, true)
                    .delay(plugin.settings.showDelayDuration)
                    .slideDown(plugin.settings.showDuration)
                    .removeClass(plugin.settings.animationOnHide)
                    .addClass(plugin.settings.animationOnShow);
            }
            $(parentItem).addClass("focus");
        };

        // hide a submenu
        plugin.hideSubmenu = function (parentItem, submenuEffect) {
            if (submenuEffect == "fade") {
                $(parentItem).find(".nav-submenu")
                    .stop(true, true)
                    .delay(plugin.settings.hideDelayDuration)
                    .fadeOut(plugin.settings.hideDuration)
                    .removeClass(plugin.settings.animationOnShow)
                    .addClass(plugin.settings.animationOnHide);
            }
            else {
                $(parentItem).find(".nav-submenu")
                    .stop(true, true)
                    .delay(plugin.settings.hideDelayDuration)
                    .slideUp(plugin.settings.hideDuration)
                    .removeClass(plugin.settings.animationOnShow)
                    .addClass(plugin.settings.animationOnHide);
            }
            $(parentItem).removeClass("focus").find(".focus").removeClass("focus");
        };

        // show the overlay panel
        var showOverlay = function () {
            if (plugin.settings.hideScrollBar) {
                $("body").addClass("no-scroll");
            }
            if (plugin.settings.overlay) {
                $(element).find(".nav-overlay-panel")
                    .css("background-color", plugin.settings.overlayColor)
                    .fadeIn(300)
                    .on("click touchstart", function () {
                        plugin.hideOffcanvas();
                    });
            }
        };

        // hide the overlay panel
        var hideOverlay = function () {
            if (plugin.settings.hideScrollBar) {
                $("body").removeClass("no-scroll");
            }
            if (plugin.settings.overlay) {
                $(element).find(".nav-overlay-panel").fadeOut(400);
            }
        };

        // show offcanvas
        plugin.showOffcanvas = function () {
            showOverlay();
            if (plugin.settings.offCanvasSide == "left") {
                $(element).find(".nav-menus-wrapper").css("transition-property", "left").addClass("nav-menus-wrapper-open");
            }
            else {
                $(element).find(".nav-menus-wrapper").css("transition-property", "right").addClass("nav-menus-wrapper-open");
            }
        };

        // hide offcanvas 
        plugin.hideOffcanvas = function () {
            $(element).find(".nav-menus-wrapper").removeClass("nav-menus-wrapper-open")
                .on("webkitTransitionEnd moztransitionend transitionend oTransitionEnd", function () {
                    $(element).find(".nav-menus-wrapper")
                        .css("transition-property", "none")
                        .off();
                });
            hideOverlay();
        };

        // toggle offcanvas
        plugin.toggleOffcanvas = function () {
            if (windowWidth() <= plugin.settings.mobileBreakpoint) {
                if ($(element).find(".nav-menus-wrapper").hasClass("nav-menus-wrapper-open")) {
                    plugin.hideOffcanvas();
                    if (options !== undefined) {
                        plugin.callback("onHideOffCanvas");
                    }
                }
                else {
                    plugin.showOffcanvas();
                    if (options !== undefined) {
                        plugin.callback("onShowOffCanvas");
                    }
                }
            }
        };

        // show/hide the search form
        plugin.toggleSearch = function () {
            if ($(element).find(".nav-search").find("form").css("display") == "none") {
                $(element).find(".nav-search").find("form").fadeIn(200);
                $(element).find(".nav-search").find("input").focus();
            }
            else {
                $(element).find(".nav-search").find("form").fadeOut(200);
                $(element).find(".nav-search").find("input").blur();
            }
        };

        // set the navigation mode and others configs
        plugin.initNavigationMode = function (screenWidth) {
            if (plugin.settings.responsive) {
                if (screenWidth <= plugin.settings.mobileBreakpoint && bigScreenFlag > plugin.settings.mobileBreakpoint) {
                    $(element).addClass("navigation-portrait").removeClass("navigation-landscape");
                    portraitMode();
                    if (options !== undefined) {
                        plugin.callback("onPortrait");
                    }
                }
                if (screenWidth > plugin.settings.mobileBreakpoint && smallScreenFlag <= plugin.settings.mobileBreakpoint) {
                    $(element).addClass("navigation-landscape").removeClass("navigation-portrait");
                    landscapeMode();
                    hideOverlay();
                    plugin.hideOffcanvas();
                    if (options !== undefined) {
                        plugin.callback("onLandscape");
                    }
                }
                bigScreenFlag = screenWidth;
                smallScreenFlag = screenWidth;
            }
            else {
                $(element).addClass("navigation-landscape");
                landscapeMode();
                if (options !== undefined) {
                    plugin.callback("onLandscape");
                }
            }
        };

        // hide submenus/form when click/touch outside
        var goOut = function () {
            $("html").on("click.body touchstart.body", function (e) {
                if ($(e.target).closest(".navigation").length === 0) {
                    $(element).find(".nav-submenu").fadeOut();
                    $(element).find(".focus").removeClass("focus");
                    $(element).find(".nav-search").find("form").fadeOut();
                }
            });
        };

        // return the window's width
        var windowWidth = function () {
            return window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;
        };

        // unbind events
        var unbindEvents = function (mode) {
            if (mode == "landscape")
                $(element).find(".nav-menu").find("li, a").off(clickTouchEvents)
            else
                $(element).find(".nav-menu").find("li, a").off(hoverShowEvents).off(hoverHideEvents);
        };

        // fix submenu right position
        var fixSubmenuRightPosition = function () {
            if (windowWidth() > plugin.settings.mobileBreakpoint) {
                var navWidth = $(element).outerWidth();
                $(element).find(".nav-menu").children("li").children(".nav-submenu").each(function () {
                    if ($(this).parent().position().left + $(this).outerWidth() > navWidth) {
                        $(this).css("right", 0);
                    }
                    else {
                        $(this).css("right", "auto");
                    }
                });
            }
        };

        // activate the tabs
        var activateTabs = function () {
            function initTabs(tabs) {
                var navs = $(tabs).children(".megamenu-tabs-nav").children("li");
                var panes = $(tabs).children(".megamenu-tabs-pane");
                $(navs).on("mouseenter.tabs click.tabs touchstart.tabs", function (e) {
                    e.stopPropagation();
                    e.preventDefault();
                    $(navs).removeClass("active");
                    $(this).addClass("active");
                    $(panes).hide(0).removeClass("active");
                    $(panes[$(this).index()]).show(0).addClass("active");
                });
            }

            if ($(element).find(".megamenu-tabs").length > 0) {
                var navigationTabs = $(element).find(".megamenu-tabs");
                for (var i = 0; i < navigationTabs.length; i++) {
                    initTabs(navigationTabs[i]);
                }
            }
        };

        // set the landscape mode
        var landscapeMode = function () {
            unbindEvents("landscape");
            resetSubmenus();
            if (navigator.userAgent.match(/Mobi/i) || navigator.maxTouchPoints > 0 || plugin.settings.submenuTrigger == "click") {
                $(element).find(".nav-menu, .nav-dropdown").children("li").children("a").on(clickTouchEvents, function (e) {
                    plugin.hideSubmenu($(this).parent("li").siblings("li"), plugin.settings.effect);
                    $(this).closest(".nav-menu").siblings(".nav-menu").find(".nav-submenu").fadeOut(plugin.settings.hideDuration);
                    if ($(this).siblings(".nav-submenu").length > 0) {
                        e.stopPropagation();
                        e.preventDefault();
                        if ($(this).siblings(".nav-submenu").css("display") == "none") {
                            plugin.showSubmenu($(this).parent("li"), plugin.settings.effect);
                            fixSubmenuRightPosition();
                            return false;
                        }
                        else {
                            plugin.hideSubmenu($(this).parent("li"), plugin.settings.effect);
                        }
                        if ($(this).attr("target") === "_blank" || $(this).attr("target") === "blank") {
                            window.open($(this).attr("href"));
                        }
                        else {
                            if ($(this).attr("href") === "#" || $(this).attr("href") === "" || $(this).attr("href") === "javascript:void(0)") {
                                return false;
                            }
                            else {
                                window.location.href = $(this).attr("href");
                            }
                        }
                    }
                });
            }
            else {
                $(element).find(".nav-menu").find("li").on(hoverShowEvents, function () {
                    plugin.showSubmenu(this, plugin.settings.effect);
                    fixSubmenuRightPosition();
                }).on(hoverHideEvents, function () {
                    plugin.hideSubmenu(this, plugin.settings.effect);
                });
            }
            if (plugin.settings.hideSubWhenGoOut) {
                goOut();
            }
        };

        // set the portrait mode
        var portraitMode = function () {
            unbindEvents("portrait");
            resetSubmenus();
            if (plugin.settings.visibleSubmenusOnMobile) {
                $(element).find(".nav-submenu").show(0);
            }
            else {
                $(element).find(".submenu-indicator").removeClass("submenu-indicator-up");
                if (plugin.settings.submenuIndicator && plugin.settings.submenuIndicatorTrigger) {
                    $(element).find(".submenu-indicator").on(clickTouchEvents, function (e) {
                        e.stopPropagation();
                        e.preventDefault();
                        plugin.hideSubmenu($(this).parent("a").parent("li").siblings("li"), "slide");
                        plugin.hideSubmenu($(this).closest(".nav-menu").siblings(".nav-menu").children("li"), "slide");
                        if ($(this).parent("a").siblings(".nav-submenu").css("display") == "none") {
                            $(this).addClass("submenu-indicator-up");
                            $(this).parent("a").parent("li").siblings("li").find(".submenu-indicator").removeClass("submenu-indicator-up");
                            $(this).closest(".nav-menu").siblings(".nav-menu").find(".submenu-indicator").removeClass("submenu-indicator-up");
                            plugin.showSubmenu($(this).parent("a").parent("li"), "slide");
                            return false;
                        }
                        else {
                            $(this).parent("a").parent("li").find(".submenu-indicator").removeClass("submenu-indicator-up");
                            plugin.hideSubmenu($(this).parent("a").parent("li"), "slide");
                        }
                    });
                }
                else {
                    $(element).find(".nav-menu, .nav-dropdown").children("li").children("a").each(function () {
                        if ($(this).siblings(".nav-submenu").length > 0) {
                            $(this).on(clickTouchEvents, function (e) {
                                e.stopPropagation();
                                e.preventDefault();
                                plugin.hideSubmenu($(this).parent("li").siblings("li"), plugin.settings.effect);
                                plugin.hideSubmenu($(this).closest(".nav-menu").siblings(".nav-menu").children("li"), "slide");
                                if ($(this).siblings(".nav-submenu").css("display") == "none") {
                                    $(this).children(".submenu-indicator").addClass("submenu-indicator-up");
                                    $(this).parent("li").siblings("li").find(".submenu-indicator").removeClass("submenu-indicator-up");
                                    $(this).closest(".nav-menu").siblings(".nav-menu").find(".submenu-indicator").removeClass("submenu-indicator-up");
                                    plugin.showSubmenu($(this).parent("li"), "slide");
                                    return false;
                                }
                                else {
                                    $(this).parent("li").find(".submenu-indicator").removeClass("submenu-indicator-up");
                                    plugin.hideSubmenu($(this).parent("li"), "slide");
                                }
                                if ($(this).attr("target") === "_blank" || $(this).attr("target") === "blank") {
                                    window.open($(this).attr("href"));
                                }
                                else {
                                    if ($(this).attr("href") === "#" || $(this).attr("href") === "" || $(this).attr("href") === "javascript:void(0)") {
                                        return false;
                                    }
                                    else {
                                        window.location.href = $(this).attr("href");
                                    }
                                }
                            });
                        }
                    });
                }
            }
        };

        plugin.callback = function (func) {
            if (options[func] !== undefined) {
                options[func].call(element);
            }
        };

        plugin.init();

    };

    $.fn.navigation = function (options) {
        return this.each(function () {
            if (undefined === $(this).data("navigation")) {
                var plugin = new $.navigation(this, options);
                $(this).data("navigation", plugin);
            }
        });
    };

})(jQuery, window, document);