/* Hop On Hop Off — header/footer interactions (child theme).
   Ported from the mockup's main.js: burger menu, Tours submenu, sticky header
   over a hero (solid otherwise), and the footer "back to top" button. */
(function () {
  "use strict";

  var header = document.getElementById("siteHeader");
  var nav = document.getElementById("primaryNav");
  var burger = document.getElementById("burger");
  var navToggle = nav && nav.querySelector(".nav__toggle");
  var mqDesktop = window.matchMedia("(min-width: 60.0625rem)");

  /* ---------- mobile menu ---------- */
  function closeMenu() {
    if (!nav || !burger) return;
    nav.classList.remove("is-open");
    burger.setAttribute("aria-expanded", "false");
  }

  if (burger && nav) {
    burger.addEventListener("click", function () {
      var open = nav.classList.toggle("is-open");
      burger.setAttribute("aria-expanded", String(open));
    });
    document.addEventListener("click", function (e) {
      if (mqDesktop.matches) return;
      if (!nav.contains(e.target) && !burger.contains(e.target)) closeMenu();
    });
    nav.addEventListener("click", function (e) {
      if (!mqDesktop.matches && e.target.closest("a")) closeMenu();
    });
  }

  document.addEventListener("keydown", function (e) {
    if (e.key !== "Escape") return;
    closeMenu();
    if (navToggle) navToggle.setAttribute("aria-expanded", "false");
  });
  mqDesktop.addEventListener("change", function (e) { if (e.matches) closeMenu(); });

  /* ---------- Tours submenu ---------- */
  if (navToggle) {
    navToggle.addEventListener("click", function () {
      var open = navToggle.getAttribute("aria-expanded") === "true";
      navToggle.setAttribute("aria-expanded", String(!open));
    });
  }

  /* ---------- header: sticky over a hero, solid elsewhere ---------- */
  var hero = document.querySelector(".hero, .hero-tour, .hero--archive");
  if (header) {
    if (hero && "IntersectionObserver" in window) {
      var sentinel = document.createElement("div");
      sentinel.setAttribute("aria-hidden", "true");
      sentinel.style.cssText = "position:absolute;top:0;left:0;width:1px;height:60vh;pointer-events:none";
      hero.appendChild(sentinel);
      new IntersectionObserver(function (entries) {
        header.classList.toggle("is-stuck", !entries[0].isIntersecting);
      }, { threshold: 0 }).observe(sentinel);
    } else {
      /* No hero to overlay — show a readable solid header from the start. */
      header.classList.add("is-solid");
    }
  }

  /* ---------- header search: expand, then submit ---------- */
  var search = document.querySelector(".header__search");
  if (search) {
    var searchInput = search.querySelector(".header__search-input");
    var searchBtn = search.querySelector(".header__search-btn");
    if (searchInput && searchBtn) {
      searchBtn.addEventListener("click", function (e) {
        if (!search.classList.contains("is-open")) {
          e.preventDefault();
          search.classList.add("is-open");
          searchInput.focus();
        } else if (!searchInput.value.trim()) {
          e.preventDefault();
          search.classList.remove("is-open"); /* empty → collapse instead of submit */
        }
        /* open + has text → let the form submit to the tours archive (?vc_q=) */
      });
      document.addEventListener("click", function (e) {
        if (!search.contains(e.target) && !searchInput.value.trim()) {
          search.classList.remove("is-open");
        }
      });
    }
  }

  /* ---------- footer: back to top ---------- */
  var toTop = document.querySelector(".ring-badge--top");
  if (toTop) {
    toTop.addEventListener("click", function (e) {
      e.preventDefault();
      window.scrollTo({ top: 0, behavior: "smooth" });
    });
  }
})();