(function () {
  const PRODUCT_ID = 1599;

  // CENY NÜRBURGRING
  const PRICE_MAP = { 2:900, 3:1350, 4:1750, 5:2150, 6:2400, 7:2700, 8:3000 };

  // DODATKI (ID checkboxa -> label + cena)
  const ADDON_MAP = {
    "102": { label: "Podpięcie przyczepy", price: 100 },
    "111": { label: "Wózki transportowe pod koła", price: 100 }
  };

  const SELECTORS = {
    pickupDate: "#pickup-date",
    dropoffDate: "#dropoff-date",
    summaryBox: ".booking-pricing-info",
    cartForm: "form.cart"
  };

  const onNurbPage = () =>
    document.body.classList.contains("postid-" + PRODUCT_ID);

  function parsePLDate(val) {
    if (!val) return null;
    val = String(val).trim();
    let m = val.match(/^(\d{2})\/(\d{2})\/(\d{4})$/);
    if (m) return new Date(+m[3], +m[2]-1, +m[1]);
    m = val.match(/^(\d{2})\.(\d{2})\.(\d{4})$/);
    if (m) return new Date(+m[3], +m[2]-1, +m[1]);
    return null;
  }

  // INKLUZYWNE LICZENIE DNI (jak MAXI)
  function diffDaysInclusive(d1, d2) {
    const ms = 24 * 60 * 60 * 1000;
    const a = new Date(d1.getFullYear(), d1.getMonth(), d1.getDate());
    const b = new Date(d2.getFullYear(), d2.getMonth(), d2.getDate());
    const diff = Math.round((b - a) / ms);
    return diff >= 0 ? diff + 1 : null;
  }

  function formatPLN(x) {
    return new Intl.NumberFormat("pl-PL", { style: "currency", currency: "PLN" })
      .format(Number(x || 0));
  }

  function ensureHidden(name, value) {
    const form = document.querySelector(SELECTORS.cartForm);
    if (!form) return;
    let el = form.querySelector(`input[name="${name}"]`);
    if (!el) {
      el = document.createElement("input");
      el.type = "hidden";
      el.name = name;
      form.appendChild(el);
    }
    el.value = value ?? "";
  }

  // AUTO: jeśli w labelu jest "za dobę" -> per_day, inaczej one_time
  function detectTypeFromLabel(labelEl) {
    const txt = (labelEl?.textContent || "").toLowerCase();
    return txt.includes("za dob") ? "per_day" : "one_time";
  }

  function getAddons(days) {
    let addonsTotal = 0;
    const addonsList = [];

    // TAK SAMO JAK W MAXI
    document.querySelectorAll("label.custom-block.checked").forEach(label => {
      const inp = label.querySelector('input.booking-extra[name="extras[]"][type="checkbox"]');
      if (!inp) return;

      const key = String(inp.value || "").trim();
      if (!ADDON_MAP[key]) return;

      const type = detectTypeFromLabel(label);
      const unit = Number(ADDON_MAP[key].price || 0);
      const cost = (type === "per_day") ? unit * days : unit;

      addonsTotal += cost;
      addonsList.push({ key, label: ADDON_MAP[key].label, type, unit, cost });
    });

    // unikat
    const uniq = [];
    const seen = new Set();
    addonsList.forEach(a => { if (!seen.has(a.key)) { seen.add(a.key); uniq.push(a); } });

    return { addonsTotal, addonsList: uniq };
  }

  function renderOurBreakdown(days, base, addonsTotal, total, addonsList) {
    const box = document.querySelector(SELECTORS.summaryBox);
    if (!box) return;

    let block = box.querySelector(".nurb-breakdown");
    if (!block) {
      block = document.createElement("div");
      block.className = "nurb-breakdown";
      block.style.marginTop = "10px";
      block.style.fontSize = "13px";
      block.style.opacity = "0.92";
      box.appendChild(block);
    }

    const addonsTxt = addonsList.length
      ? addonsList.map(a => {
          const suffix = (a.type === "per_day") ? ` (${formatPLN(a.unit)}/doba × ${days})` : "";
          return `${a.label}: ${formatPLN(a.cost)}${suffix}`;
        }).join(" • ")
      : "brak";

    block.innerHTML = `
      <div><strong>NÜRBURGRING:</strong></div>
      <div>Czas: ${days} dni</div>
      <div>Pakiet: ${formatPLN(base)}</div>
      <div>Dodatki: ${addonsTxt}</div>
      <div><strong>Razem: ${formatPLN(total)}</strong></div>
    `;
  }

  function recalc() {
    if (!onNurbPage()) return;

    const d1 = parsePLDate(document.querySelector(SELECTORS.pickupDate)?.value);
    const d2 = parsePLDate(document.querySelector(SELECTORS.dropoffDate)?.value);
    if (!d1 || !d2) return;

    const days = diffDaysInclusive(d1, d2);
    if (!days || !PRICE_MAP[days]) return;

    const base = PRICE_MAP[days];
    const { addonsTotal, addonsList } = getAddons(days);
    const total = base + addonsTotal;

    // 🔑 hidden inputy POD PHP (NÜRB)
    ensureHidden("nurb_package_days", days);
    ensureHidden("nurb_base_price", base);
    ensureHidden("nurb_addons_keys", addonsList.map(a => a.key).join(","));
    ensureHidden("nurb_total_price", total);

    renderOurBreakdown(days, base, addonsTotal, total, addonsList);
  }

  document.addEventListener("click", () => setTimeout(recalc, 150), true);
  document.addEventListener("change", () => setTimeout(recalc, 150), true);
  document.addEventListener("DOMContentLoaded", () => setInterval(recalc, 450));
})();