(function () {
  function getDirectChildSubmenuList(submenu) {
    for (const child of submenu.children) {
      if (child.tagName === "UL" && child.classList.contains("el-menu--inline")) {
        return child;
      }
    }
    return null;
  }

  function setExpanded(title, expand) {
    const submenu = title.closest(".el-submenu");
    if (!submenu) {
      return;
    }

    const list = getDirectChildSubmenuList(submenu);
    if (!list) {
      return;
    }

    submenu.classList.toggle("codex-static-submenu-open", expand);
    list.style.display = expand ? "block" : "none";
    title.setAttribute("aria-expanded", String(expand));
  }

  function toggle(title) {
    const submenu = title.closest(".el-submenu");
    if (!submenu) {
      return;
    }
    const list = getDirectChildSubmenuList(submenu);
    if (!list) {
      return;
    }
    const computed = window.getComputedStyle(list).display;
    setExpanded(title, computed === "none");
  }

  function expandAncestorsForCurrentLink() {
    const currentPath = window.location.pathname.replace(/index\.html$/, "");
    const anchors = document.querySelectorAll("a[href]");
    anchors.forEach((anchor) => {
      const href = anchor.getAttribute("href");
      if (!href || href.startsWith("#") || href.startsWith("http")) {
        return;
      }
      let resolvedPath = "";
      try {
        resolvedPath = new URL(href, window.location.href).pathname.replace(/index\.html$/, "");
      } catch (_error) {
        return;
      }
      if (resolvedPath !== currentPath) {
        return;
      }

      let submenu = anchor.closest(".el-submenu");
      while (submenu) {
        const title = submenu.querySelector(":scope > .el-submenu__title");
        if (title) {
          setExpanded(title, true);
        }
        submenu = submenu.parentElement ? submenu.parentElement.closest(".el-submenu") : null;
      }
    });
  }

  function initStaticSubmenus() {
    const titles = document.querySelectorAll(".el-submenu > .el-submenu__title");
    titles.forEach((title) => {
      const submenu = title.closest(".el-submenu");
      if (!submenu) {
        return;
      }
      const list = getDirectChildSubmenuList(submenu);
      if (!list) {
        return;
      }

      title.setAttribute("role", "button");
      title.setAttribute("tabindex", "0");
      title.setAttribute("aria-expanded", window.getComputedStyle(list).display !== "none" ? "true" : "false");

      title.addEventListener("click", function (event) {
        event.preventDefault();
        event.stopPropagation();
        toggle(title);
      });

      title.addEventListener("keydown", function (event) {
        if (event.key !== "Enter" && event.key !== " ") {
          return;
        }
        event.preventDefault();
        toggle(title);
      });
    });

    expandAncestorsForCurrentLink();
  }

  if (document.readyState === "loading") {
    document.addEventListener("DOMContentLoaded", initStaticSubmenus);
  } else {
    initStaticSubmenus();
  }
})();