// Header dropdown menus (Help Center, account avatar) and the browse-place
// autosubmit. Progressive enhancement over real links: without JS every
// trigger is an ordinary <a href> and the location picker submits through
// its fallback button.
(function () {
  "use strict";

  var openMenu = null;

  function setOpen(menu, open) {
    menu.classList.toggle("is-open", open);
    var trigger = menu.querySelector("[data-menu-trigger]");
    if (trigger) trigger.setAttribute("aria-expanded", open ? "true" : "false");
    openMenu = open ? menu : null;
  }

  document.querySelectorAll("[data-menu]").forEach(function (menu) {
    var trigger = menu.querySelector("[data-menu-trigger]");
    if (!trigger) return;
    trigger.addEventListener("click", function (event) {
      event.preventDefault();
      var isOpen = menu.classList.contains("is-open");
      if (openMenu && openMenu !== menu) setOpen(openMenu, false);
      setOpen(menu, !isOpen);
    });
  });

  document.addEventListener("click", function (event) {
    if (openMenu && !openMenu.contains(event.target)) setOpen(openMenu, false);
  });
  document.addEventListener("keydown", function (event) {
    if (event.key === "Escape" && openMenu) {
      var menu = openMenu;
      var trigger = menu.querySelector("[data-menu-trigger]");
      setOpen(menu, false);
      if (trigger) trigger.focus();
    }
  });

  // Browsing-place <select>: submit the surrounding GET form on change so
  // picking a city navigates like the source's location picker.
  document.querySelectorAll("select[data-autosubmit]").forEach(function (sel) {
    sel.addEventListener("change", function () {
      if (sel.form) sel.form.submit();
    });
  });
})();