/* Datewise storefront widget. Vanilla JS, no dependencies, safe to load twice.
 * Talks to the app through the shop's app proxy (/apps/datewise/*), so it works on any theme.
 *
 * Lifecycle
 *   cart change ─▶ refresh(): read /cart.js ─▶ POST availability ─▶ revalidate selection ─▶ render
 *   slot click  ─▶ POST hold (capacity reserved for N minutes) ─▶ write cart attributes + fee line
 *   checkout    ─▶ (optional) block click until a time is chosen; the checkout function enforces it server-side
 */
(function () {
  "use strict";
  if (window.__datewiseLoaded) return;
  window.__datewiseLoaded = true;

  // ---------- config ----------
  var cfgEl = document.querySelector("[data-datewise-config]");
  var CFG = {};
  try { CFG = cfgEl ? JSON.parse(cfgEl.textContent) : {}; } catch (e) { CFG = {}; }
  var T = Object.assign({
    choose: "Pick a highlighted date", needTime: "Please choose a delivery or pickup time before checking out.",
    held: "Held for you for", expired: "Your hold expired. Tap the time again to check it's still free.", left: "left", full: "Full",
    postal: "Postal / ZIP code", check: "Check", waitlist: "Join the waitlist", joined: "You're on the waitlist. We'll message you if a place opens.",
    dispatch: "Ships this day (not an arrival date)", change: "Change", prep: "Earliest times include preparation for", free: "Free", fee: "fee",
    nextAvailable: "Next available", offer: "A place opened up and we're holding it for you", error: "Something went wrong. Please try again."
  }, CFG.text || {});
  var ROOT = ((window.Shopify && Shopify.routes && Shopify.routes.root) || "/").replace(/\/?$/, "/");
  var API = ROOT + "apps/datewise";
  var LOCALE = CFG.locale || document.documentElement.lang || "en";
  var CURRENCY = CFG.currency || (window.Shopify && Shopify.currency && Shopify.currency.active) || "CAD";
  var ATTR = "_datewise";

  // ---------- storage (best effort) ----------
  function lsGet(k) { try { return localStorage.getItem("datewise_" + k); } catch (e) { return null; } }
  function lsSet(k, v) { try { v == null ? localStorage.removeItem("datewise_" + k) : localStorage.setItem("datewise_" + k, v); } catch (e) {} }

  // ---------- state ----------
  var S = {
    data: null, cart: null, lines: [], loading: false, message: null, messageTone: "info",
    method: lsGet("method"), locationId: lsGet("location"), postal: lsGet("postal") || "",
    date: null, sel: null, token: lsGet("token"), expiresAt: null, monthOffset: 0, waitlistDone: false, mutating: 0
  };

  // ---------- helpers ----------
  function esc(s) { return String(s == null ? "" : s).replace(/[&<>"']/g, function (c) { return { "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#39;" }[c]; }); }
  function money(c) { try { return new Intl.NumberFormat(LOCALE, { style: "currency", currency: CURRENCY }).format(c / 100); } catch (e) { return "$" + (c / 100).toFixed(2); } }
  function dateLabel(d, long) { return new Intl.DateTimeFormat(LOCALE, { weekday: long ? "long" : "short", month: long ? "long" : "short", day: "numeric", timeZone: "UTC" }).format(new Date(d + "T12:00:00Z")); }
  function timeLabel(hhmm) { var p = hhmm.split(":"); return new Intl.DateTimeFormat(LOCALE, { hour: "numeric", minute: p[1] === "00" ? undefined : "2-digit", timeZone: "UTC" }).format(new Date(Date.UTC(2000, 0, 1, +p[0], +p[1]))); }
  function slotText(s) { return timeLabel(s.start) + " – " + timeLabel(s.end); }
  function addMonths(ym, n) { var y = +ym.slice(0, 4), m = +ym.slice(5, 7) - 1 + n; y += Math.floor(m / 12); m = ((m % 12) + 12) % 12; return y + "-" + String(m + 1).padStart(2, "0"); }
  function daysIn(ym) { return new Date(Date.UTC(+ym.slice(0, 4), +ym.slice(5, 7), 0)).getUTCDate(); }
  function weekday(d) { return new Date(d + "T12:00:00Z").getUTCDay(); }

  function api(path, body, method) {
    var url = API + path;
    var init = { method: method || "POST", headers: { "Content-Type": "application/json", Accept: "application/json" }, credentials: "same-origin" };
    if (body && init.method !== "GET") init.body = JSON.stringify(body);
    return realFetch(url, init).then(function (r) { return r.json().catch(function () { return { ok: false, message: T.error }; }); });
  }
  function cartReq(path, body) {
    S.mutating++;
    return realFetch(ROOT + path, { method: body ? "POST" : "GET", headers: { "Content-Type": "application/json", Accept: "application/json" }, body: body ? JSON.stringify(body) : undefined, credentials: "same-origin" })
      .then(function (r) { return r.json(); })
      .finally(function () { setTimeout(function () { S.mutating--; }, 50); });
  }

  // ---------- cart ----------
  function readCart() {
    return cartReq("cart.js").then(function (cart) {
      S.cart = cart;
      S.lines = cart.items.filter(function (i) { return !(i.properties && i.properties._datewise_fee); })
        .map(function (i) { return { variantId: i.variant_id, quantity: i.quantity, price: i.final_price, title: i.product_title }; });
      var raw = cart.attributes && cart.attributes[ATTR];
      if (raw) {
        try {
          var a = JSON.parse(raw);
          S.sel = { method: a.m, locationId: a.l, date: a.d, slot: a.s, fee: a.f };
          S.token = a.t; lsSet("token", a.t);
          S.method = S.method || a.m; S.locationId = S.locationId || a.l; S.date = S.date || a.d;
        } catch (e) { S.sel = null; }
      } else S.sel = null;
      return cart;
    });
  }

  function feeLines() { return (S.cart ? S.cart.items : []).filter(function (i) { return i.properties && i.properties._datewise_fee; }); }

  function syncFee(variantId) {
    var current = feeLines();
    var chain = Promise.resolve();
    var keep = null;
    current.forEach(function (line) {
      if (!keep && variantId && String(line.variant_id) === String(variantId) && line.quantity === 1) keep = line;
      else chain = chain.then(function () { return cartReq("cart/change.js", { id: line.key, quantity: 0 }); });
    });
    if (variantId && !keep) chain = chain.then(function () { return cartReq("cart/add.js", { items: [{ id: Number(variantId), quantity: 1, properties: { _datewise_fee: "1" } }] }); });
    var changed = current.length !== (keep ? 1 : 0) || (variantId && !keep);
    return chain.then(function () { return changed; });
  }

  function writeAttributes(attrs) {
    var prev = [];
    try { prev = JSON.parse(lsGet("keys") || "[]"); } catch (e) {}
    var out = {};
    prev.forEach(function (k) { out[k] = ""; });
    Object.keys(attrs).forEach(function (k) { out[k] = attrs[k]; });
    lsSet("keys", JSON.stringify(Object.keys(attrs)));
    return cartReq("cart/update.js", { attributes: out });
  }

  function notifyTheme(feeChanged) {
    var detail = { source: "datewise" };
    ["cart:refresh", "cart:updated", "cart:change", "theme:cart:change"].forEach(function (n) { document.dispatchEvent(new CustomEvent(n, { detail: detail, bubbles: true })); });
    if (typeof window.publish === "function" && window.PUB_SUB_EVENTS) {
      readCart().then(function (cart) { window.publish(window.PUB_SUB_EVENTS.cartUpdate, { source: "datewise", cartData: cart }); });
    } else if (feeChanged && /\/cart\/?$/.test(location.pathname)) {
      setTimeout(function () { location.reload(); }, 300); // totals must show the fee line
    }
  }

  function clearSelection(reason) {
    var token = S.token;
    S.sel = null; S.expiresAt = null;
    if (reason) setMessage(reason, "critical");
    if (token) api("/release", { token: token }).catch(function () {});
    return writeAttributes({ [ATTR]: "" }).then(function () { return syncFee(null); }).then(function (changed) { lsSet("keys", "[]"); if (changed) notifyTheme(true); });
  }

  // ---------- data ----------
  var timer = null;
  function refresh(soon) {
    clearTimeout(timer);
    timer = setTimeout(load, soon ? 0 : 300);
  }
  function load() {
    if (!roots().length && !CFG.checkoutGuard) return Promise.resolve();
    S.loading = true; renderAll();
    return readCart().then(function () {
      if (!S.lines.length) { S.data = null; S.loading = false; if (S.sel) clearSelection(null); renderAll(); return; }
      return api("/availability", { lines: S.lines, method: S.method || undefined, locationId: S.locationId || undefined, postal: S.postal || undefined, token: S.token || undefined, locale: LOCALE })
        .then(function (data) {
          S.loading = false;
          if (!data || data.ok === false) { setMessage((data && data.message) || T.error, "critical"); renderAll(); return; }
          S.data = data;
          S.method = data.method; S.locationId = data.locationId;
          revalidate();
          renderAll();
        });
    }).catch(function () { S.loading = false; setMessage(T.error, "critical"); renderAll(); });
  }

  function findSlot(date, slot) {
    var d = S.data && S.data.dates.filter(function (x) { return x.date === date; })[0];
    return { d: d, s: d && d.slots.filter(function (x) { return x.id === slot; })[0] };
  }

  /** The cart, method or location changed: drop a selection the rules no longer allow, with a reason. */
  function revalidate() {
    if (!S.sel) return;
    var d = S.data;
    if (!d || d.method !== S.sel.method || d.locationId !== S.sel.locationId) return clearSelection(null);
    var f = findSlot(S.sel.date, S.sel.slot);
    if (!f.s || !f.s.available) {
      var why = (f.s && f.s.reason) || (f.d && f.d.reasons[0]) || "";
      clearSelection(why ? why + ". " + T.choose + "." : T.choose);
    }
  }

  function hold(date, slot) {
    if (!S.data) return;
    setMessage(null);
    S.loading = true; renderAll();
    return api("/hold", { lines: S.lines, method: S.data.method, locationId: S.data.locationId, date: date, slot: slot, token: S.token || undefined, postal: S.postal || undefined, locale: LOCALE })
      .then(function (res) {
        if (!res.ok) { S.loading = false; setMessage(res.message || T.error, "critical"); refresh(true); return; }
        S.token = res.token; lsSet("token", res.token);
        S.expiresAt = Date.parse(res.expiresAt);
        S.sel = { method: S.data.method, locationId: S.data.locationId, date: date, slot: slot, fee: res.fee ? res.fee.fee : 0 };
        return writeAttributes(res.attributes)
          .then(function () { return syncFee(res.feeVariantId); })
          .then(function (changed) { S.loading = false; renderAll(); notifyTheme(changed); });
      })
      .catch(function () { S.loading = false; setMessage(T.error, "critical"); renderAll(); });
  }

  function setMessage(text, tone) { S.message = text; S.messageTone = tone || "info"; }

  // ---------- rendering ----------
  function roots() { return Array.prototype.slice.call(document.querySelectorAll("[data-datewise-root]")); }
  function renderAll() { roots().forEach(render); }

  function render(root) {
    if (!root.classList.contains("datewise")) root.classList.add("datewise"); // custom mounts get styles too
    var d = S.data;
    var heading = root.getAttribute("data-heading") || (d && d.text && d.text.heading) || "";
    if (d && d.text && d.text.accent) root.style.setProperty("--ss-accent", d.text.accent);
    var h = "";
    if (heading) h += '<h2 class="ss-h">' + esc(heading) + "</h2>";
    h += '<div class="ss-live" role="status" aria-live="polite">' + (S.message ? '<p class="ss-msg ss-' + S.messageTone + '">' + esc(S.message) + "</p>" : "") + "</div>";
    if (!d) { root.innerHTML = h + (S.loading ? '<div class="ss-skeleton" aria-hidden="true"></div>' : ""); root.setAttribute("aria-busy", S.loading); return; }

    // methods
    h += '<div class="ss-methods" role="group" aria-label="Delivery method">';
    d.methods.forEach(function (m) {
      var on = m.method === d.method;
      h += '<button type="button" class="ss-method" data-ss="method" data-v="' + m.method + '" aria-pressed="' + on + '"' + (m.available || on ? "" : ' aria-disabled="true"') + ">" +
        "<b>" + esc(d.text.labels[m.method]) + "</b><small>" + (m.needsAddress ? esc(T.postal) : m.available ? (m.firstDate ? esc(T.nextAvailable + ": " + dateLabel(m.firstDate)) : "") : esc(m.reason || "")) + "</small></button>";
    });
    h += "</div>";
    if (!d.method) { root.innerHTML = h; return; }

    if (d.method === "delivery") {
      h += '<form class="ss-postal" data-ss="postal"><label for="ss-postal-' + rid(root) + '">' + esc(T.postal) + '</label><div class="ss-row"><input id="ss-postal-' + rid(root) + '" name="postal" autocomplete="postal-code" value="' + esc(S.postal) + '"><button type="submit">' + esc(T.check) + "</button></div></form>";
    }
    if (d.split) h += '<p class="ss-msg ss-critical">' + esc(d.split) + "</p>";

    if (d.method !== "shipping" && d.locations.length > 1) {
      h += '<div class="ss-locs" role="group" aria-label="Location">';
      d.locations.forEach(function (l) {
        var on = l.id === d.locationId;
        var right = l.fee ? (l.fee.waived ? T.free : money(l.fee.fee)) : l.distanceKm != null ? l.distanceKm + " km" : "";
        h += '<button type="button" class="ss-loc" data-ss="loc" data-v="' + esc(l.id) + '" aria-pressed="' + on + '"' + (l.eligible ? "" : ' aria-disabled="true"') + "><span><b>" + esc(l.name) + "</b><small>" +
          esc(l.eligible ? (l.first ? T.nextAvailable + ": " + dateLabel(l.first.date) : "") : l.reason || "") + "</small></span><span>" + esc(right) + "</span></button>";
      });
      h += "</div>";
    } else if (d.locationId) {
      var only = d.locations.filter(function (l) { return l.id === d.locationId; })[0];
      if (only && d.method !== "shipping") h += '<p class="ss-note">' + esc(only.name) + (only.fee ? " · " + (only.fee.waived ? T.free : money(only.fee.fee) + " " + T.fee) : "") + "</p>";
    }
    if (!d.locationId) {
      if (d.needsAddress) { root.innerHTML = h; return; }
      var why = d.locations[0] && d.locations[0].reason;
      root.innerHTML = h + (why ? '<p class="ss-msg ss-critical">' + esc(why) + "</p>" : "");
      return;
    }
    if (d.prepNote && d.prepNote.minutes >= 60) h += '<p class="ss-note">' + esc(T.prep + " " + d.prepNote.item) + " (" + Math.round(d.prepNote.minutes / 6) / 10 + " h)</p>";
    var peak = d.dates.filter(function (x) { return x.peak && x.peak.message; })[0];
    if (peak) h += '<p class="ss-msg ss-peak">' + esc(peak.peak.message) + "</p>";

    h += calendar(d);
    h += slots(d, root);
    root.innerHTML = h;
    root.setAttribute("aria-busy", S.loading);
    tickTimer();
  }

  var ridSeq = 0;
  function rid(root) { if (!root.__ssid) root.__ssid = ++ridSeq; return root.__ssid; }

  function calendar(d) {
    var map = {};
    d.dates.forEach(function (x) { map[x.date] = x; });
    var firstAvail = (d.dates.filter(function (x) { return x.available; })[0] || d.dates[0] || {}).date;
    if (!firstAvail) return "";
    var ym = addMonths(firstAvail.slice(0, 7), S.monthOffset);
    var start = d.text.weekStartsOn || 0;
    var first = ym + "-01";
    var lead = (weekday(first) - start + 7) % 7;
    var h = '<div class="ss-cal"><div class="ss-calhead"><button type="button" data-ss="month" data-v="-1" aria-label="Previous month">‹</button><b>' +
      esc(new Intl.DateTimeFormat(LOCALE, { month: "long", year: "numeric", timeZone: "UTC" }).format(new Date(first + "T12:00:00Z"))) +
      '</b><button type="button" data-ss="month" data-v="1" aria-label="Next month">›</button></div><div class="ss-grid" role="grid">';
    for (var w = 0; w < 7; w++) {
      var wd = (start + w) % 7;
      h += '<span class="ss-dow" aria-hidden="true">' + esc(new Intl.DateTimeFormat(LOCALE, { weekday: "narrow", timeZone: "UTC" }).format(new Date(Date.UTC(2023, 0, 1 + wd)))) + "</span>";
    }
    for (var i = 0; i < lead; i++) h += "<span></span>";
    for (var day = 1; day <= daysIn(ym); day++) {
      var date = ym + "-" + String(day).padStart(2, "0");
      var x = map[date];
      var cls = "ss-day", label = dateLabel(date, true), extra = "";
      if (!x) cls += " ss-out";
      else if (x.available) { cls += " ss-avail"; if (d.text.showRemaining && x.remaining != null && x.remaining <= 5) extra = '<i class="ss-left">' + x.remaining + "</i>"; }
      else if (x.waitlist || /full|booked/i.test(x.reasons[0] || "")) { cls += " ss-full"; label += ", " + T.full; }
      else { cls += " ss-closed"; label += ", " + (x.reasons[0] || ""); }
      if (S.date === date) cls += " ss-sel";
      if (x && x.peak) { cls += " ss-peakday"; label += ", " + x.peak.name; }
      h += '<button type="button" class="' + cls + '" data-ss="date" data-v="' + date + '" aria-label="' + esc(label) + '"' + (x && (x.available || x.waitlist || x.reasons.length) ? "" : ' aria-disabled="true"') + ' tabindex="' + (S.date === date || (!S.date && date === firstAvail) ? "0" : "-1") + '">' + day + extra + "</button>";
    }
    return h + "</div></div>";
  }

  function slots(d, root) {
    if (!S.date) return '<p class="ss-note">' + esc(T.choose) + "</p>";
    var x = d.dates.filter(function (y) { return y.date === S.date; })[0];
    if (!x) return "";
    var h = '<div class="ss-day-detail"><h3>' + esc(dateLabel(x.date, true)) + (x.peak ? ' <span class="ss-badge">' + esc(x.peak.name) + "</span>" : "") + "</h3>";
    if (d.dateOnly) h += '<p class="ss-note">' + esc(T.dispatch) + "</p>";
    if (!x.available) {
      h += '<p class="ss-msg ' + (x.waitlist ? "ss-peak" : "ss-critical") + '">' + esc(x.reasons.join(". ")) + "</p>";
      if (x.waitlist && !S.waitlistDone)
        h += '<form class="ss-row" data-ss="waitlist"><input type="email" name="email" required placeholder="Email" aria-label="Email"><button type="submit">' + esc(T.waitlist) + "</button></form>";
      if (S.waitlistDone) h += '<p class="ss-msg ss-success">' + esc(T.joined) + "</p>";
      return h + "</div>";
    }
    h += '<div class="ss-slots" role="group" aria-label="Times">';
    x.slots.forEach(function (s) {
      var on = S.sel && S.sel.date === x.date && S.sel.slot === s.id;
      var sub = s.available ? (d.text.showRemaining && s.remaining != null ? s.remaining + " " + T.left : "") + (s.surcharge ? (s.remaining != null && d.text.showRemaining ? " · " : "") + "+" + money(s.surcharge) : "") : s.reason || "";
      h += '<button type="button" class="ss-slot" data-ss="slot" data-v="' + s.id + '" aria-pressed="' + !!on + '"' + (s.available || on ? "" : ' aria-disabled="true"') + "><b>" + esc(d.dateOnly ? dateLabel(x.date) : slotText(s)) + "</b><small>" + esc(sub) + "</small></button>";
    });
    h += "</div>";
    if (S.sel && S.sel.date === x.date) {
      var live = S.expiresAt && S.expiresAt > Date.now();
      h += '<p class="ss-hold">' + (live ? esc(T.held) + ' <b data-ss-timer></b>' : S.expiresAt ? esc(T.expired) : "✓") + "</p>";
      var loc = d.locations.filter(function (l) { return l.id === d.locationId; })[0];
      if (loc && loc.pickupInstructions) h += '<p class="ss-note">' + esc(loc.pickupInstructions) + "</p>";
    }
    return h + "</div>";
  }

  function tickTimer() {
    var left = S.expiresAt ? S.expiresAt - Date.now() : 0;
    var els = document.querySelectorAll("[data-ss-timer]");
    if (left <= 0 && els.length) return renderAll();
    var s = Math.max(0, Math.round(left / 1000));
    for (var i = 0; i < els.length; i++) els[i].textContent = Math.floor(s / 60) + ":" + String(s % 60).padStart(2, "0");
  }
  setInterval(tickTimer, 1000);

  // ---------- events ----------
  document.addEventListener("click", function (e) {
    var t = e.target.closest && e.target.closest("[data-datewise-root] [data-ss]");
    if (!t || t.tagName === "FORM") return;
    if (t.getAttribute("aria-disabled") === "true" && t.getAttribute("data-ss") !== "date") return;
    var a = t.getAttribute("data-ss"), v = t.getAttribute("data-v");
    if (a === "method" && v !== S.method) { S.method = v; lsSet("method", v); S.date = null; S.monthOffset = 0; refresh(true); }
    else if (a === "loc" && v !== S.locationId) { S.locationId = v; lsSet("location", v); S.date = null; refresh(true); }
    else if (a === "month") { S.monthOffset += +v; renderAll(); }
    else if (a === "date") { S.date = v; S.waitlistDone = false; setMessage(null); renderAll(); focusFirst(".ss-slot:not([aria-disabled])"); }
    else if (a === "slot") hold(S.date, v);
  });

  document.addEventListener("submit", function (e) {
    var f = e.target;
    if (!f.closest || !f.closest("[data-datewise-root]")) return;
    var a = f.getAttribute("data-ss");
    if (!a) return;
    e.preventDefault();
    if (a === "postal") { S.postal = f.postal.value.trim(); lsSet("postal", S.postal); S.date = null; refresh(true); }
    if (a === "waitlist" && S.data) {
      api("/waitlist", { method: S.data.method, locationId: S.data.locationId, date: S.date, slot: "*", email: f.email.value.trim() }).then(function (r) {
        if (r.ok) S.waitlistDone = true; else setMessage(r.message || T.error, "critical");
        renderAll();
      });
    }
  });

  // Arrow-key navigation in the calendar grid.
  document.addEventListener("keydown", function (e) {
    var t = e.target;
    if (!t.classList || !t.classList.contains("ss-day")) return;
    var step = { ArrowLeft: -1, ArrowRight: 1, ArrowUp: -7, ArrowDown: 7 }[e.key];
    if (!step) return;
    var days = Array.prototype.slice.call(t.parentNode.querySelectorAll(".ss-day"));
    var next = days[days.indexOf(t) + step];
    if (next) { e.preventDefault(); t.tabIndex = -1; next.tabIndex = 0; next.focus(); }
  });
  function focusFirst(sel) { setTimeout(function () { var el = document.querySelector("[data-datewise-root] " + sel); if (el) el.focus(); }, 0); }

  // Checkout guard (convenience; the checkout function is the real enforcement).
  function needsTime() { return S.data && S.data.requireScheduling && S.lines.length > 0 && !S.sel; }
  function guard(e) {
    if (!CFG.checkoutGuard || !needsTime()) return;
    var t = e.target.closest && e.target.closest('[name="checkout"], a[href$="/checkout"], form[action$="/checkout"] [type="submit"]');
    if (!t) return;
    e.preventDefault(); e.stopPropagation();
    setMessage(T.needTime, "critical");
    renderAll();
    var r = roots()[0];
    if (r) { r.scrollIntoView({ behavior: "smooth", block: "center" }); }
  }
  document.addEventListener("click", guard, true);

  // React to cart changes made by the theme (add, quantity, remove) — revalidate the selection.
  var realFetch = window.fetch.bind(window);
  window.fetch = function (input, init) {
    var url = typeof input === "string" ? input : input && input.url;
    var p = realFetch(input, init);
    if (url && /\/cart\/(add|change|update|clear)(\.js)?/.test(url) && !S.mutating) p.then(function () { refresh(); });
    return p;
  };
  ["cart:updated", "cart:change", "cart-drawer:open", "ajaxCart:updated"].forEach(function (n) {
    document.addEventListener(n, function (e) { if (!(e.detail && e.detail.source === "datewise")) refresh(); });
  });
  if (typeof window.subscribe === "function" && window.PUB_SUB_EVENTS)
    window.subscribe(window.PUB_SUB_EVENTS.cartUpdate, function (ev) { if (!ev || ev.source !== "datewise") refresh(); });

  // ---------- cart drawer mounting ----------
  var DRAWER_SELECTORS = [CFG.drawerSelector, "cart-drawer .drawer__footer", "#CartDrawer .drawer__footer", "#CartDrawer-Footer", ".cart-drawer__footer", "#cart-drawer .cart__footer", ".js-cart-drawer .cart-drawer__footer", "[data-cart-drawer] footer"].filter(Boolean);
  function mountDrawer() {
    for (var i = 0; i < DRAWER_SELECTORS.length; i++) {
      var foot = document.querySelector(DRAWER_SELECTORS[i]);
      if (foot && !foot.querySelector("[data-datewise-root]")) {
        var el = document.createElement("div");
        el.className = "datewise datewise--drawer";
        el.setAttribute("data-datewise-root", "");
        el.setAttribute("data-drawer", "");
        foot.insertBefore(el, foot.firstChild);
        if (S.data) render(el); else refresh(true);
        return;
      }
    }
  }
  if (cfgEl) {
    mountDrawer();
    new MutationObserver(function () { mountDrawer(); }).observe(document.body, { childList: true, subtree: true });
  }

  // ---------- waitlist offer links (?datewise_offer=…) ----------
  function adoptOffer() {
    var m = location.search.match(/[?&]datewise_offer=([^&]+)/);
    if (!m) return Promise.resolve();
    return api("/offer?token=" + encodeURIComponent(m[1]), null, "GET").then(function (o) {
      if (!o.ok) { setMessage(o.message, "critical"); return; }
      S.token = o.token; lsSet("token", o.token);
      S.method = o.method; S.locationId = o.locationId; S.date = o.date;
      setMessage(T.offer + ": " + dateLabel(o.date, true) + ".", "success");
      return load().then(function () { if (S.data && S.data.locationId === o.locationId) return hold(o.date, o.slot); });
    });
  }

  adoptOffer().then(function () { if (!S.data) refresh(true); });
})();