---
import Layout from "../../../layouts/Layout.astro";
import type { Locale } from "../../../i18n/config";
import { useTranslations } from "../../../i18n/ui";

const lang: Locale = "en";
const t = useTranslations(lang);
---
<Layout title="Cart" description="Your cart at Van's DIY & Bastelbedarf." lang={lang} path="/warenkorb/">
  <section class="section-tight">
    <div class="container">
      <span class="eyebrow">{t.cart.eyebrow}</span>
      <h1>{t.cart.title}</h1>
    </div>
  </section>

  <section class="section-tight">
    <div class="container">
      <div id="cart-empty" class="card" style="display:none;">
        <p>{t.cart.empty}</p>
        <a class="btn btn-primary" href="/en/shop/">{t.common.browseShop}</a>
      </div>

      {/* Treuebonus-Banner: nur sichtbar, wenn im Konto ein Bonus wartet (siehe scripts/account.ts)
          — erklärt direkt hier, dass man unten bei einem Artikel "-20%" auswählen kann. */}
      <div class="card loyalty-banner" id="loyalty-banner" style="display:none;">
        <span class="loyalty-banner-icon" aria-hidden="true">🎁</span>
        <div>
          <strong>{t.cart.loyaltyBannerTitle}</strong>
          <p>{t.cart.loyaltyBannerText}</p>
        </div>
      </div>

      <div id="cart-content" class="cart-layout" style="display:none;">
        <div class="card cart-items" id="cart-items"></div>
        <aside class="card cart-summary">
          <h3>🧾 {t.cart.subtotal}</h3>
          <div id="summary-items" class="checkout-summary"></div>
          <div class="summary-row"><span>{t.cart.subtotal}</span><span id="sum-subtotal">0,00 €</span></div>
          <div class="summary-row discount-row" id="discount-row" style="display:none;"><span>{t.cart.discount}</span><span id="sum-discount">-0,00 €</span></div>
          <div class="summary-row discount-row" id="partner-discount-row" style="display:none;"><span>{t.cart.partnerDiscount}</span><span id="sum-partner-discount">-0,00 €</span></div>
          <div class="summary-row discount-row" id="loyalty-discount-row" style="display:none;"><span>{t.cart.loyaltyDiscount}</span><span id="sum-loyalty-discount">-0,00 €</span></div>
          <div class="summary-row discount-row" id="abo-discount-row" style="display:none;"><span>{t.cart.aboDiscount}</span><span id="sum-abo-discount">-0,00 €</span></div>
          <div class="coupon-row">
            <label for="coupon-input">{t.cart.couponLabel}</label>
            <div class="coupon-input-group">
              <input type="text" id="coupon-input" placeholder={t.cart.couponPlaceholder} />
              <button type="button" id="coupon-apply" class="btn btn-outline btn-sm">{t.cart.couponApply}</button>
            </div>
            <p class="small" id="coupon-status"></p>
          </div>
          <div class="coupon-row">
            <label for="partner-code-input">{t.cart.partnerCodeLabel}</label>
            <div class="coupon-input-group">
              <input type="text" id="partner-code-input" placeholder={t.cart.partnerCodePlaceholder} />
              <button type="button" id="partner-code-apply" class="btn btn-outline btn-sm">{t.cart.partnerCodeApply}</button>
            </div>
            <p class="small" id="partner-code-status"></p>
          </div>
          <div class="ship-country-row">
            <label for="cart-land">📦 {t.checkout.country}</label>
            <select id="cart-land">
              <option value="de">Germany</option>
              <option value="at">Austria</option>
              <option value="ch">Switzerland</option>
              <option value="lu">Luxembourg</option>
            </select>
          </div>
          <div class="summary-row"><span>{t.cart.shipping}</span><span id="sum-shipping">{t.cart.shippingCalculated}</span></div>
          <p class="free-shipping-badge" id="shipping-hint"></p>
          <hr class="divider" />
          <div class="summary-row total"><span>{t.cart.total}</span><span id="sum-total">0,00 €</span></div>
          <p class="small">{t.common.vatNote}</p>
          <a class="btn btn-primary btn-block" href="/en/checkout/">{t.cart.toCheckout}</a>
        </aside>
      </div>
    </div>
  </section>
</Layout>

<script define:vars={{ freeShipFrom: 75, removeLabel: t.cart.remove, perItemLabel: t.cart.perItem, remainingTemplate: t.cart.remaining("__V__"), freeShippingText: t.cart.freeShipping, freeLabel: t.checkout.free, cartLang: lang, mengenrabattTemplate: t.cart.mengenrabatt("__P__"), couponInvalid: t.cart.couponInvalid, couponAppliedTemplate: t.cart.couponApplied("__C__"), couponRemoveLabel: t.cart.couponRemove, buyNowLabel: t.cart.buyNow, keptInCartLabel: t.cart.keptInCart, partnerCodeInvalid: t.cart.partnerCodeInvalid, partnerCodeAppliedTemplate: t.cart.partnerCodeApplied("__C__"), partnerCodeRemoveLabel: t.cart.partnerCodeRemove, loyaltySelectLabel: t.cart.loyaltySelectLabel, loyaltySelectedLabel: t.cart.loyaltySelectedLabel, gratisLabel: t.cart.gratisPraemie }}>
  // WICHTIG: define:vars-Skripte laufen als IIFE, keine "import"-Anweisungen möglich.
  window.__cartVars = { freeShipFrom, removeLabel, perItemLabel, remainingTemplate, freeShippingText, freeLabel, cartLang, mengenrabattTemplate, couponInvalid, couponAppliedTemplate, couponRemoveLabel, buyNowLabel, keptInCartLabel, partnerCodeInvalid, partnerCodeAppliedTemplate, partnerCodeRemoveLabel, loyaltySelectLabel, loyaltySelectedLabel, gratisLabel };
</script>
<script type="module">
  import { getCart, updateQuantity, removeFromCart, cartTotal, appliedCoupon, couponDiscount, setCouponCode, clearCoupon, appliedPartnerCode, partnerCodeDiscount, setPartnerCode, clearPartnerCode, totalDiscount, treuebonusDiscount, aboDiscount, istAusgewaehlt, setAusgewaehlt, zeilenpreisFuer } from "../../../scripts/cart";
  import { formatPrice } from "../../../i18n/format";
  import { getProduct, products } from "../../../data/products";
  import { berechneVersandkosten } from "../../../data/versand";
import { mengenrabattProzent } from "../../../data/rabatt";
import { getAccount, treueFortschritt, setTreuebonusArtikel } from "../../../scripts/account";

  const { freeShipFrom, removeLabel, perItemLabel, remainingTemplate, freeShippingText, freeLabel, cartLang, mengenrabattTemplate, couponInvalid, couponAppliedTemplate, couponRemoveLabel, buyNowLabel, keptInCartLabel, partnerCodeInvalid, partnerCodeAppliedTemplate, partnerCodeRemoveLabel, loyaltySelectLabel, loyaltySelectedLabel, gratisLabel } = window.__cartVars;
  const landSelect = document.getElementById("cart-land");

  function render() {
    const cart = getCart();
    const empty = document.getElementById("cart-empty");
    const content = document.getElementById("cart-content");
    const itemsEl = document.getElementById("cart-items");

    if (cart.length === 0) {
      empty.style.display = "block";
      content.style.display = "none";
      return;
    }
    empty.style.display = "none";
    content.style.display = "grid";

    const zeilen = cart.map((i) => {
      const produkt = getProduct(i.slug);
      const zeilenpreis = zeilenpreisFuer(i);
      const mengenProzent = produkt ? mengenrabattProzent(produkt, i.menge) : 0;
      return { item: i, produkt, zeilenpreis, mengenProzent };
    });

    // Treuebonus: nur relevant, wenn im Konto gerade eine Belohnung auf Einlösung wartet — dann
    // darf hier EIN Artikel frei ausgewählt werden, auf den die -20% angewendet werden.
    const konto = getAccount();
    const treueAktiv = treueFortschritt(konto).aktiv;
    const gewaehlterSlug = konto.treuebonusArtikelSlug;
    const loyaltyBanner = document.getElementById("loyalty-banner");
    if (loyaltyBanner) loyaltyBanner.style.display = treueAktiv ? "flex" : "none";

    itemsEl.innerHTML = zeilen.map(({ item: i, produkt, zeilenpreis, mengenProzent }) => {
      const foto = produkt?.bilder?.[0];
      const thumb = foto
        ? `<img class="thumb product-photo" src="${foto}" alt="${i.name}" loading="lazy" />`
        : `<div class="img-placeholder thumb" role="img" aria-label="${i.name}"></div>`;
      const mengenBadge = mengenProzent > 0 ? `<div class="small mengenrabatt-badge">${mengenrabattTemplate.replace("__P__", mengenProzent)}</div>` : "";
      const ausgewaehlt = istAusgewaehlt(i);
      const keptBadge = !ausgewaehlt ? `<div class="small kept-in-cart-badge">🕓 ${keptInCartLabel}</div>` : "";
      const istTreueartikel = gewaehlterSlug === i.slug;
      const loyaltyControl = !treueAktiv ? "" : istTreueartikel
        ? `<span class="loyalty-selected-badge">${loyaltySelectedLabel}</span>`
        : `<label class="loyalty-select"><input type="radio" name="loyalty-artikel" data-loyalty-slug="${i.slug}" /> ${loyaltySelectLabel}</label>`;
      const gratisBadge = i.gratis ? `<div class="small loyalty-selected-badge">🧸 ${gratisLabel}</div>` : "";
      return `
      <div class="cart-item ${ausgewaehlt ? "" : "deselected"} ${istTreueartikel ? "loyalty-selected" : ""}">
        <input type="checkbox" class="buy-toggle" data-slug="${i.slug}" ${ausgewaehlt ? "checked" : ""} aria-label="${buyNowLabel}" title="${buyNowLabel}" />
        ${thumb}
        <div class="info">
          <strong>${i.name}</strong>
          ${!i.gratis ? `<div class="small">${formatPrice(zeilenpreis / i.menge, cartLang)} ${perItemLabel}</div>` : ""}
          ${mengenBadge}
          ${keptBadge}
          ${gratisBadge}
          ${loyaltyControl}
        </div>
        <div class="qty-controls">
          <button data-action="dec" data-slug="${i.slug}" aria-label="−">−</button>
          <span>${i.menge}</span>
          <button data-action="inc" data-slug="${i.slug}" aria-label="+">+</button>
        </div>
        <div class="line-total">${formatPrice(zeilenpreis, cartLang)}</div>
        <a href="#" class="remove" data-action="remove" data-slug="${i.slug}">✕ ${removeLabel}</a>
      </div>
    `;
    }).join("");

    itemsEl.querySelectorAll("[data-loyalty-slug]").forEach((el) => {
      el.addEventListener("change", (e) => {
        setTreuebonusArtikel(e.currentTarget.dataset.loyaltySlug);
        render();
      });
    });

    // Nur ausgewählte Artikel fließen in Rechnung/Zwischensumme/Versand/Checkout ein — abgewählte
    // bleiben sichtbar im Warenkorb liegen (leicht abgedunkelt), ohne mitgekauft zu werden.
    const ausgewaehlteZeilen = zeilen.filter(({ item: i }) => istAusgewaehlt(i));

    // Rechnungs-Übersicht in der Zusammenfassung — dieselbe Positionsliste wie im Warenkorb
    // links, nur kompakt als "Beleg" (Menge × Name → Zeilenpreis), passend zum Checkout.
    document.getElementById("summary-items").innerHTML = ausgewaehlteZeilen.map(({ item: i, zeilenpreis }) =>
      `<div class="row"><span>${i.menge}× ${i.name}</span><span>${formatPrice(zeilenpreis, cartLang)}</span></div>`
    ).join("");

    const subtotal = cartTotal();
    const remaining = Math.max(0, freeShipFrom - subtotal);
    const shipping = berechneVersandkosten(landSelect.value, ausgewaehlteZeilen.map(({ item: i }) => ({ slug: i.slug, preis: i.preis, menge: i.menge })), products);
    const coupon = appliedCoupon();
    const discount = couponDiscount(subtotal);
    const partnerCode = appliedPartnerCode();
    const partnerDiscount = partnerCodeDiscount(subtotal);
    const total = Math.max(0, subtotal - totalDiscount(subtotal)) + shipping;
    document.getElementById("sum-subtotal").textContent = formatPrice(subtotal, cartLang);
    document.getElementById("sum-shipping").textContent = shipping === 0 ? freeLabel : formatPrice(shipping, cartLang);
    document.getElementById("sum-total").textContent = formatPrice(total, cartLang);
    document.getElementById("shipping-hint").textContent =
      remaining > 0 ? remainingTemplate.replace("__V__", formatPrice(remaining, cartLang)) : `🩵 ${freeShippingText}`;

    const discountRow = document.getElementById("discount-row");
    const couponStatus = document.getElementById("coupon-status");
    const couponInput = document.getElementById("coupon-input");
    if (coupon && discount > 0) {
      discountRow.style.display = "flex";
      document.getElementById("sum-discount").textContent = "-" + formatPrice(discount, cartLang);
      couponStatus.innerHTML = `✅ ${couponAppliedTemplate.replace("__C__", coupon.code)} <a href="#" id="coupon-clear">✕ ${couponRemoveLabel}</a>`;
      couponInput.value = coupon.code;
      const clearLink = document.getElementById("coupon-clear");
      if (clearLink) clearLink.addEventListener("click", (e) => { e.preventDefault(); clearCoupon(); render(); });
    } else {
      discountRow.style.display = "none";
      couponStatus.textContent = couponInput.dataset.invalid === "1" ? couponInvalid : "";
    }

    const partnerDiscountRow = document.getElementById("partner-discount-row");
    const partnerStatus = document.getElementById("partner-code-status");
    const partnerInput = document.getElementById("partner-code-input");
    if (partnerCode && partnerDiscount > 0) {
      partnerDiscountRow.style.display = "flex";
      document.getElementById("sum-partner-discount").textContent = "-" + formatPrice(partnerDiscount, cartLang);
      partnerStatus.innerHTML = `✅ ${partnerCodeAppliedTemplate.replace("__C__", partnerCode.code)} <a href="#" id="partner-code-clear">✕ ${partnerCodeRemoveLabel}</a>`;
      partnerInput.value = partnerCode.code;
      const partnerClearLink = document.getElementById("partner-code-clear");
      if (partnerClearLink) partnerClearLink.addEventListener("click", (e) => { e.preventDefault(); clearPartnerCode(); render(); });
    } else {
      partnerDiscountRow.style.display = "none";
      partnerStatus.textContent = partnerInput.dataset.invalid === "1" ? partnerCodeInvalid : "";
    }

    const loyaltyDiscountRow = document.getElementById("loyalty-discount-row");
    const loyaltyDiscount = treuebonusDiscount();
    if (loyaltyDiscountRow) {
      if (loyaltyDiscount > 0) {
        loyaltyDiscountRow.style.display = "flex";
        document.getElementById("sum-loyalty-discount").textContent = "-" + formatPrice(loyaltyDiscount, cartLang);
      } else {
        loyaltyDiscountRow.style.display = "none";
      }
    }

    const aboDiscountRow = document.getElementById("abo-discount-row");
    const aboDiscountBetrag = aboDiscount(subtotal);
    if (aboDiscountRow) {
      if (aboDiscountBetrag > 0) {
        aboDiscountRow.style.display = "flex";
        document.getElementById("sum-abo-discount").textContent = "-" + formatPrice(aboDiscountBetrag, cartLang);
      } else {
        aboDiscountRow.style.display = "none";
      }
    }

    itemsEl.querySelectorAll("button, a.remove").forEach((el) => {
      el.addEventListener("click", (e) => {
        e.preventDefault();
        const target = e.currentTarget;
        const slug = target.dataset.slug;
        const action = target.dataset.action;
        const item = getCart().find((i) => i.slug === slug);
        if (!item) return;
        // Nie mehr in den Warenkorb legen können, als tatsächlich auf Lager ist.
        if (action === "inc") {
          const produkt = getProduct(slug);
          const max = produkt ? produkt.bestand : Infinity;
          updateQuantity(slug, Math.min(item.menge + 1, max));
        }
        if (action === "dec") updateQuantity(slug, item.menge - 1);
        if (action === "remove") removeFromCart(slug);
        render();
      });
    });

    itemsEl.querySelectorAll(".buy-toggle").forEach((el) => {
      el.addEventListener("change", (e) => {
        setAusgewaehlt(e.currentTarget.dataset.slug, e.currentTarget.checked);
        render();
      });
    });
  }

  document.getElementById("coupon-apply").addEventListener("click", () => {
    const input = document.getElementById("coupon-input");
    const code = input.value.trim();
    if (!code) { clearCoupon(); render(); return; }
    setCouponCode(code);
    input.dataset.invalid = appliedCoupon() ? "0" : "1";
    render();
  });

  document.getElementById("partner-code-apply").addEventListener("click", () => {
    const input = document.getElementById("partner-code-input");
    const code = input.value.trim();
    if (!code) { clearPartnerCode(); render(); return; }
    setPartnerCode(code);
    input.dataset.invalid = appliedPartnerCode() ? "0" : "1";
    render();
  });

  render();
  window.addEventListener("cart:changed", render);
  // Treuebonus-Auswahl liegt im Konto, nicht im Warenkorb — eigenes Event, damit die Anzeige
  // auch reagiert, wenn sich NUR das Konto ändert (z.B. Bonus wird woanders freigeschaltet).
  window.addEventListener("account:changed", render);
  landSelect.addEventListener("change", render);
</script>