(() => {
    "use strict";

    const menu = document.getElementById("master_0");

    const legacyHeader = document.querySelector(".matrix-shell #PageFrame > .title");
    const legacyTitle = legacyHeader?.querySelector(":scope > .matrix-title-text, :scope > span#title");
    if (legacyTitle && !legacyTitle.classList.contains("matrix-shell__legacy-title")) {
        const parts = legacyTitle.textContent
            .replace(/\u00a0/g, " ")
            .split(/\s{2,}/)
            .map((part) => part.replace(/^\|\s*/, "").trim())
            .filter(Boolean);

        if (parts.length >= 3 && /^(nimble|cygnus)\b/i.test(parts[0])) {
            const brand = parts.shift();
            const user = parts.pop();
            const company = parts.pop();
            const pageName = parts.join(" · ");

            legacyTitle.textContent = "";
            legacyTitle.className = "matrix-shell__legacy-title";

            const brandElement = document.createElement("strong");
            brandElement.className = "matrix-shell__legacy-brand";
            brandElement.textContent = brand;
            legacyTitle.appendChild(brandElement);

            if (pageName) {
                const pageElement = document.createElement("span");
                pageElement.className = "matrix-shell__legacy-page";
                pageElement.textContent = pageName;
                legacyTitle.appendChild(pageElement);
            }

            const context = document.createElement("span");
            context.className = "matrix-shell__legacy-context";
            const companyElement = document.createElement("span");
            companyElement.className = "matrix-shell__legacy-company";
            companyElement.textContent = company;
            const userElement = document.createElement("span");
            userElement.className = "matrix-shell__legacy-user";
            userElement.textContent = user;
            context.append(companyElement, userElement);
            legacyTitle.appendChild(context);
        }
    }


    window.SubmitForm = (pageUrl, targetWindow, formName) => {
        if (!pageUrl || pageUrl === "#") {
            return false;
        }

        const form = document.forms[formName];
        if (!form) {
            return false;
        }

        form.action = pageUrl;
        form.target = targetWindow;
        form.submit();
        return true;
    };

    window.SubmitMenuCommand = (pageUrl, targetWindow, formName, requestValue) => {
        const form = document.forms[formName];
        const pageValue = form?.elements.namedItem("pageval");
        if (pageValue) {
            pageValue.value = requestValue ?? "";
        }
        return window.SubmitForm(pageUrl, targetWindow, formName);
    };

    if (!menu) {
        return;
    }

    const closeMenus = (except) => {
        menu.querySelectorAll(".matrix-menu-open").forEach((item) => {
            if (item !== except && (!except || !item.contains(except))) {
                item.classList.remove("matrix-menu-open");
                item.querySelector(":scope > a")?.setAttribute("aria-expanded", "false");
            }
        });
    };

    menu.querySelectorAll("a").forEach((link) => {
        link.setAttribute("href", "#");
        const item = link.parentElement;
        const submenu = item?.querySelector(":scope > ul");
        const hasChildren = Boolean(submenu?.querySelector(":scope > li"));

        if (hasChildren) {
            link.setAttribute("aria-haspopup", "true");
            link.setAttribute("aria-expanded", "false");
            link.addEventListener("click", (event) => {
                event.preventDefault();
                const willOpen = !item.classList.contains("matrix-menu-open");
                closeMenus(item);
                item.classList.toggle("matrix-menu-open", willOpen);
                link.setAttribute("aria-expanded", String(willOpen));
            });
        }

        link.addEventListener("keydown", (event) => {
            if (event.key === "Escape") {
                closeMenus();
                link.focus();
            } else if (event.key === "ArrowDown" && hasChildren) {
                event.preventDefault();
                item.classList.add("matrix-menu-open");
                link.setAttribute("aria-expanded", "true");
                submenu.querySelector("a")?.focus();
            }
        });
    });

    document.addEventListener("click", (event) => {
        if (!menu.contains(event.target)) {
            closeMenus();
        }
    });
})();