/* Viator Collector — front-end interactions for the "Hop On Hop Off" design.
   Ported from the mockup's main.js, trimmed to what the plugin renders inside
   #vc-app. Listing filtering itself stays server-side (GET form submit); this
   file only adds UX: card rails, FAQ accordion, testimonials marquee, the date
   field, and auto-submit on quick filter toggles. */
(function () {
  "use strict";

  // The design is scoped to .vc-app wrappers; there can be several on one page
  // (e.g. multiple homepage section shortcodes), so query document-wide.
  var app = document;

  /* ---------- card rails (prev / next) ---------- */
  function railStep(rail) {
    var card = rail.firstElementChild;
    if (!card) return rail.clientWidth;
    var gap = parseFloat(getComputedStyle(rail).columnGap) || 0;
    return card.getBoundingClientRect().width + gap;
  }

  function syncRailButtons(rail, prev, next) {
    var max = rail.scrollWidth - rail.clientWidth - 1;
    if (prev) prev.disabled = rail.scrollLeft <= 0;
    if (next) next.disabled = rail.scrollLeft >= max;
  }

  Array.prototype.forEach.call(app.querySelectorAll(".rail"), function (rail) {
    var prev = document.querySelector('[data-rail-prev="' + rail.id + '"]');
    var next = document.querySelector('[data-rail-next="' + rail.id + '"]');

    if (prev) prev.addEventListener("click", function () {
      rail.scrollBy({ left: -railStep(rail), behavior: "smooth" });
    });
    if (next) next.addEventListener("click", function () {
      rail.scrollBy({ left: railStep(rail), behavior: "smooth" });
    });

    rail.addEventListener("scroll", function () {
      syncRailButtons(rail, prev, next);
    }, { passive: true });
    window.addEventListener("resize", function () {
      syncRailButtons(rail, prev, next);
    });
    syncRailButtons(rail, prev, next);
  });

  /* ---------- testimonials marquee: duplicate for a seamless loop ---------- */
  Array.prototype.forEach.call(app.querySelectorAll("[data-marquee] .marquee__track"), function (track) {
    Array.prototype.slice.call(track.children).forEach(function (node) {
      var copy = node.cloneNode(true);
      copy.setAttribute("aria-hidden", "true");
      track.appendChild(copy);
    });
  });

  /* ---------- FAQ accordion ---------- */
  Array.prototype.forEach.call(app.querySelectorAll("[data-accordion]"), function (accordion) {
    accordion.addEventListener("click", function (e) {
      var btn = e.target.closest(".acc__q");
      if (!btn) return;
      var open = btn.getAttribute("aria-expanded") === "true";
      Array.prototype.forEach.call(accordion.querySelectorAll(".acc__q"), function (other) {
        other.setAttribute("aria-expanded", "false");
      });
      btn.setAttribute("aria-expanded", String(!open));
    });
  });

  /* ---------- date field: text placeholder, native picker on focus ---------- */
  Array.prototype.forEach.call(app.querySelectorAll("[data-datefield]"), function (dateField) {
    dateField.addEventListener("focus", function () {
      dateField.type = "date";
      if (typeof dateField.showPicker === "function") {
        try { dateField.showPicker(); } catch (err) { /* not user-activated */ }
      }
    });
    dateField.addEventListener("blur", function () {
      if (!dateField.value) dateField.type = "text";
    });
  });

  /* ---------- listing: auto-submit on quick toggles (checks / sort) ---------- */
  Array.prototype.forEach.call(app.querySelectorAll("form.filters, form#vc-filter-form"), function (form) {
    form.addEventListener("change", function (e) {
      if (e.target.closest(".vc-autosubmit")) form.submit();
    });
  });

  /* ---------- city guide: long About text folds behind "Read more" ---------- */
  Array.prototype.forEach.call(app.querySelectorAll("[data-vc-clamp]"), function (text) {
    var btn = text.nextElementSibling;
    text.classList.add("is-clamped");
    if (!btn || text.scrollHeight <= text.clientHeight + 8) {
      text.classList.remove("is-clamped");
      return;
    }
    btn.hidden = false;
    btn.addEventListener("click", function () {
      var open = text.classList.toggle("is-clamped") === false;
      btn.setAttribute("aria-expanded", open ? "true" : "false");
      btn.querySelector("span").textContent = open ? "Read less" : "Read more";
    });
  });

  /* ---------- single tour: "view all photos" scrolls the gallery ---------- */
  var viewAll = app.querySelector(".tg-viewall, .gallery__viewall");
  if (viewAll) viewAll.addEventListener("click", function () {
    var g = app.querySelector(".gallery, .tour-gallery");
    if (g) g.scrollIntoView({ behavior: "smooth" });
  });

  /* ---------- gallery lightbox (zoom / view photos) ---------- */
  (function () {
    var imgs = Array.prototype.slice.call(app.querySelectorAll(".gallery img"));
    if (!imgs.length) return;

    var host = imgs[0].closest(".vc-app") || document.body;
    var box = document.createElement("div");
    box.className = "vc-lightbox" + (imgs.length < 2 ? " vc-lightbox--single" : "");
    box.setAttribute("role", "dialog");
    box.setAttribute("aria-modal", "true");
    box.innerHTML =
      '<button class="vc-lightbox__btn vc-lightbox__prev" type="button" aria-label="Previous"><svg class="icon icon--24" aria-hidden="true"><use href="#i-arrow-left"></use></svg></button>' +
      '<img class="vc-lightbox__img" alt="">' +
      '<button class="vc-lightbox__btn vc-lightbox__next" type="button" aria-label="Next"><svg class="icon icon--24" aria-hidden="true"><use href="#i-arrow-right"></use></svg></button>' +
      '<button class="vc-lightbox__btn vc-lightbox__close" type="button" aria-label="Close"><svg class="icon icon--24" aria-hidden="true"><use href="#i-x"></use></svg></button>' +
      '<span class="vc-lightbox__count"></span>';
    host.appendChild(box);

    var bigImg = box.querySelector(".vc-lightbox__img");
    var count = box.querySelector(".vc-lightbox__count");
    var idx = 0;

    function show(i) {
      idx = (i + imgs.length) % imgs.length;
      bigImg.src = imgs[idx].currentSrc || imgs[idx].src;
      bigImg.alt = imgs[idx].alt || "";
      count.textContent = (idx + 1) + " / " + imgs.length;
    }
    function open(i) {
      show(i);
      box.classList.add("is-open");
      document.documentElement.style.overflow = "hidden";
    }
    function close() {
      box.classList.remove("is-open");
      document.documentElement.style.overflow = "";
    }

    imgs.forEach(function (img, i) {
      img.addEventListener("click", function () { open(i); });
    });
    box.querySelector(".vc-lightbox__prev").addEventListener("click", function () { show(idx - 1); });
    box.querySelector(".vc-lightbox__next").addEventListener("click", function () { show(idx + 1); });
    box.querySelector(".vc-lightbox__close").addEventListener("click", close);
    box.addEventListener("click", function (e) { if (e.target === box) close(); });
    /* tour page top gallery: "All N photos" opens at the first photo not on show */
    var allBtn = app.querySelector(".tgal__all");
    if (allBtn) allBtn.addEventListener("click", function () { open(Math.min(3, imgs.length - 1)); });
    document.addEventListener("keydown", function (e) {
      if (!box.classList.contains("is-open")) return;
      if (e.key === "Escape") close();
      else if (e.key === "ArrowLeft") show(idx - 1);
      else if (e.key === "ArrowRight") show(idx + 1);
    });
  })();
})();