/**
 * AKSRT nav chrome — zibll contract (folding, chevron, language, drawer a11y).
 * Drawer open/close via aksrt-runtime [data-toggle-class] → body.mobile-navbar-show.
 */
(function () {
  "use strict";

  var foldTimer = null;

  function appendChevrons(root) {
    (root || document).querySelectorAll(".navbar-top li.menu-item-has-children > a").forEach(function (a) {
      if (a.querySelector(".fa-angle-down, .fas.fa-angle-down")) return;
      var i = document.createElement("i");
      i.className = "fa fa-angle-down ml6";
      i.setAttribute("aria-hidden", "true");
      a.appendChild(i);
    });
  }

  function clearFolding() {
    // Support both zibll-style more and any legacy .aksrt-nav-more nodes.
    var mores = document.querySelectorAll(".navbar-nav > li.aksrt-nav-more");
    Array.prototype.forEach.call(mores, function (more) {
      var nav = more.parentNode;
      if (!nav) {
        more.remove();
        return;
      }
      // Prefer direct child .sub-menu (zibll contract); fall back to first matching submenu.
      var sub = null;
      for (var i = 0; i < more.children.length; i++) {
        var child = more.children[i];
        if (
          child.tagName === "UL" &&
          (child.classList.contains("sub-menu") ||
            child.classList.contains("aksrt-nav-more__dropdown"))
        ) {
          sub = child;
          break;
        }
      }
      if (!sub) {
        sub = more.querySelector(".sub-menu, .aksrt-nav-more__dropdown");
      }
      if (sub) {
        while (sub.firstChild) {
          // Guard: only insertBefore when more is still a child of nav.
          if (more.parentNode === nav) {
            nav.insertBefore(sub.firstChild, more);
          } else {
            nav.appendChild(sub.firstChild);
          }
        }
      }
      more.remove();
    });
  }

  function navFolding() {
    var collapse = document.querySelector(".navbar-collapse");
    var nav = document.querySelector(".navbar-nav");
    if (!collapse || !nav) return;

    clearFolding();

    if (window.innerWidth <= 996) return;
    var header = document.querySelector(".header");
    if (header && header.offsetHeight <= 81) return;

    var surplus = collapse.clientWidth;
    Array.prototype.forEach.call(collapse.children, function (child) {
      if (!child.classList.contains("navbar-nav")) {
        surplus -= child.offsetWidth || 0;
      }
    });
    var headerEl = document.querySelector(".navbar-header");
    surplus -= (headerEl ? headerEl.offsetWidth : 0) + 40;

    var navsWidth = 66;
    var foldItems = [];
    Array.prototype.forEach.call(nav.children, function (li) {
      if (li.classList.contains("aksrt-nav-more")) return;
      navsWidth += li.offsetWidth || 0;
      if (navsWidth > surplus) foldItems.push(li);
    });
    if (!foldItems.length) return;

    var more = document.createElement("li");
    more.className = "menu-item menu-item-has-children aksrt-nav-more";
    more.innerHTML =
      '<a href="javascript:void(0);"><i class="fas fa-bars" aria-hidden="true"></i></a><ul class="sub-menu"></ul>';
    var sub = more.querySelector(".sub-menu");
    foldItems.forEach(function (li) {
      if (li && li.parentNode) sub.appendChild(li);
    });
    nav.appendChild(more);
    appendChevrons(more);
  }

  function scheduleFold() {
    if (foldTimer) clearTimeout(foldTimer);
    foldTimer = setTimeout(function () {
      try { navFolding(); } catch (e) {}
    }, 80);
  }

  function bindLanguage() {
    document.addEventListener("click", function (e) {
      var btn = e.target && e.target.closest ? e.target.closest(".translate-button[data-language]") : null;
      if (!btn) return;
      e.preventDefault();
      var lang = btn.getAttribute("data-language");
      if (!lang) return;
      try { localStorage.setItem("aksrt_lang", lang); } catch (err) {}
      var url = new URL(window.location.href);
      url.searchParams.set("lang", lang);
      window.location.href = url.toString();
    });
  }

  function bindDrawerA11y() {
    document.addEventListener("keydown", function (e) {
      if (e.key === "Escape" && document.body.classList.contains("mobile-navbar-show")) {
        document.body.classList.remove("mobile-navbar-show");
      }
    });
  }

  function init() {
    appendChevrons();
    scheduleFold();
    bindLanguage();
    bindDrawerA11y();
    window.addEventListener("resize", scheduleFold, { passive: true });
  }

  if (window.AksrtFrontend && typeof window.AksrtFrontend.register === "function") {
    window.AksrtFrontend.register("aksrt-nav-chrome", function () { init(); });
  } else if (document.readyState === "loading") {
    document.addEventListener("DOMContentLoaded", init);
  } else {
    init();
  }
})();