/* Etsy storefront interactions. */

(function () {
  "use strict";

  function ready(fn) {
    if (document.readyState !== "loading") { fn(); return; }
    document.addEventListener("DOMContentLoaded", fn);
  }

  ready(function () {
    // Source-faithful category menu. It is a real button/overlay on every
    // viewport, closes on outside click or Escape, and leaves each menu item
    // as a plain link when JavaScript is unavailable.
    var toggle = document.querySelector(".cat-toggle");
    var nav = document.getElementById("category-menu");
    var scrim = document.querySelector("[data-category-scrim]");
    if (toggle && nav) {
      var setCategoryOpen = function (open) {
        toggle.setAttribute("aria-expanded", String(open));
        nav.hidden = !open;
        if (scrim) { scrim.hidden = !open; }
      };
      toggle.addEventListener("click", function (event) {
        event.stopPropagation();
        setCategoryOpen(toggle.getAttribute("aria-expanded") !== "true");
      });
      if (scrim) { scrim.addEventListener("click", function () { setCategoryOpen(false); }); }
      document.addEventListener("click", function (event) {
        if (!nav.hidden && !nav.contains(event.target)) { setCategoryOpen(false); }
      });
      document.addEventListener("keydown", function (event) {
        if (event.key === "Escape" && !nav.hidden) {
          setCategoryOpen(false);
          toggle.focus();
        }
      });
    }

    // Header search band: an ARIA combobox layered over the real GET form.
    // Debounced, single-flight via AbortController, with a monotonic sequence
    // guard so a slow early response cannot overwrite a newer one.  Every
    // suggestion is a query this database actually resolves, so choosing one
    // always lands on a real results page.  With scripting off the form
    // submits to /search exactly as before.
    var band = document.querySelector("[data-search-band]");
    if (band) {
      var input = band.querySelector("[data-search-input]");
      var list = band.querySelector("[data-search-list]");
      var status = band.querySelector("[data-search-status]");
      var endpoint = band.getAttribute("data-suggest-endpoint");
      var timer = null;
      var controller = null;
      var sequence = 0;
      var settled = 0;
      var active = -1;

      var closeList = function () {
        list.hidden = true;
        list.innerHTML = "";
        input.setAttribute("aria-expanded", "false");
        input.removeAttribute("aria-activedescendant");
        active = -1;
      };

      var highlight = function (next) {
        var options = list.querySelectorAll("[role=option]");
        if (!options.length) { return; }
        if (next < 0) { next = options.length - 1; }
        if (next >= options.length) { next = 0; }
        active = next;
        Array.prototype.forEach.call(options, function (option, index) {
          var on = index === active;
          option.setAttribute("aria-selected", String(on));
          option.classList.toggle("active", on);
          if (on) { input.setAttribute("aria-activedescendant", option.id); }
        });
      };

      var draw = function (results) {
        if (!results.length) {
          closeList();
          status.textContent = "No matching searches.";
          return;
        }
        list.innerHTML = "";
        results.forEach(function (result, index) {
          var item = document.createElement("li");
          item.id = "global-search-option-" + index;
          item.setAttribute("role", "option");
          item.setAttribute("aria-selected", "false");
          var link = document.createElement("a");
          link.href = "/search?q=" + encodeURIComponent(result.query);
          link.textContent = result.query;
          var count = document.createElement("span");
          count.className = "suggestion-count";
          count.textContent = result.results + " results";
          link.appendChild(count);
          item.appendChild(link);
          list.appendChild(item);
        });
        list.hidden = false;
        input.setAttribute("aria-expanded", "true");
        active = -1;
        status.textContent =
          results.length + (results.length === 1 ? " search" : " searches") + " suggested.";
      };

      var fetchSuggestions = function (query) {
        if (controller) { controller.abort(); }
        controller = new AbortController();
        var ticket = ++sequence;
        fetch(endpoint + "?q=" + encodeURIComponent(query), {
          signal: controller.signal,
          headers: { "Accept": "application/json" }
        })
          .then(function (response) {
            if (!response.ok) { throw new Error("suggest failed"); }
            return response.json();
          })
          .then(function (payload) {
            if (ticket <= settled) { return; }
            settled = ticket;
            draw((payload && payload.results) || []);
          })
          .catch(function (error) {
            if (error && error.name === "AbortError") { return; }
            closeList();
            status.textContent = "Suggestions unavailable. Press Enter to search.";
          });
      };

      input.addEventListener("input", function () {
        var query = input.value.trim();
        if (timer) { window.clearTimeout(timer); }
        if (query.length < 2) {
          if (controller) { controller.abort(); }
          closeList();
          status.textContent = "";
          return;
        }
        timer = window.setTimeout(function () { fetchSuggestions(query); }, 180);
      });

      input.addEventListener("keydown", function (event) {
        if (list.hidden) { return; }
        if (event.key === "ArrowDown") { event.preventDefault(); highlight(active + 1); }
        else if (event.key === "ArrowUp") { event.preventDefault(); highlight(active - 1); }
        else if (event.key === "Escape") { closeList(); }
        else if (event.key === "Enter" && active >= 0) {
          var chosen = list.querySelectorAll("[role=option] a")[active];
          if (chosen) { event.preventDefault(); window.location.assign(chosen.href); }
        }
      });

      document.addEventListener("click", function (event) {
        if (!band.contains(event.target)) { closeList(); }
      });
      closeList();
    }

    // Homepage feature carousel. The source controls are buttons that cycle
    // through distinct image/copy/CTA panels without navigating away. There
    // is deliberately no autoplay, so the page remains stable for keyboard,
    // touch, and assistive-technology users.
    var carousel = document.querySelector("[data-hero-carousel]");
    if (carousel) {
      var slides = Array.prototype.slice.call(
        carousel.querySelectorAll("[data-hero-slide]")
      );
      var previous = carousel.querySelector('[data-carousel-direction="previous"]');
      var next = carousel.querySelector('[data-carousel-direction="next"]');
      var carouselStatus = carousel.querySelector("[data-carousel-status]");
      var activeSlide = 0;

      var showSlide = function (index) {
        if (!slides.length) { return; }
        activeSlide = (index + slides.length) % slides.length;
        slides.forEach(function (slide, slideIndex) {
          var active = slideIndex === activeSlide;
          slide.hidden = !active;
          slide.setAttribute("aria-hidden", String(!active));
        });
        if (carouselStatus) {
          carouselStatus.textContent =
            "Feature " + (activeSlide + 1) + " of " + slides.length;
        }
      };

      if (previous) {
        previous.addEventListener("click", function () { showSlide(activeSlide - 1); });
      }
      if (next) {
        next.addEventListener("click", function () { showSlide(activeSlide + 1); });
      }
      showSlide(0);
    }

    // Favourite controls stay real POST forms — this only announces the
    // outcome, which a full page navigation would otherwise leave silent for
    // a screen-reader user, and marks the toggle state for assistive tech.
    document.querySelectorAll(".favorite-form").forEach(function (form) {
      var button = form.querySelector("button[type=submit]");
      if (!button) { return; }
      var action = form.querySelector("input[name=action]");
      var adding = !action || action.value === "add";
      button.setAttribute("aria-pressed", String(!adding));
      form.addEventListener("submit", function () {
        button.setAttribute("data-submitting", "true");
        var live = form.querySelector("[data-favorite-status]");
        if (live) {
          live.textContent = adding ? "Adding to favorites…" : "Removing from favorites…";
        }
      });
    });

    // First-visit cookie-consent overlay reproduction. Session-scoped
    // (sessionStorage) disposable UI state only; Escape and Okay dismiss it.
    var overlay = document.getElementById("cookie-overlay");
    if (overlay) {
      var seen = false;
      try { seen = window.sessionStorage.getItem("cookie-overlay") === "1"; }
      catch (error) { seen = true; }
      if (!seen) {
        overlay.hidden = false;
        var okay = overlay.querySelector(".cookie-okay");
        var dismiss = function () {
          overlay.hidden = true;
          try { window.sessionStorage.setItem("cookie-overlay", "1"); }
          catch (error) { /* disposable */ }
        };
        if (okay) {
          okay.addEventListener("click", dismiss);
          okay.focus();
        }
        document.addEventListener("keydown", function (event) {
          if (event.key === "Escape" && !overlay.hidden) { dismiss(); }
        });
      }
    }
  });
})();