---
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="Checkout" description="Complete your order at Van's DIY & Bastelbedarf." lang={lang} path="/checkout/">
  <section class="section-tight">
    <div class="container">
      <span class="eyebrow">{t.checkout.eyebrow}</span>
      <h1>{t.checkout.title}</h1>
      <p class="todo-note">{t.checkout.todoNote}</p>
    </div>
  </section>

  <section class="section-tight">
    <div class="container checkout-layout">
      <form class="frm card" id="checkout-form">
        <div class="checkout-split">
        <div class="checkout-split-col">
        <h3>{t.checkout.step2}</h3>
        <div class="payment-options">
          <label class="pay-option" style="--brand-color:#009cde; --brand-bg:#003087;">
            <span class="pay-icon" style="background:linear-gradient(160deg, #0070ba, #003087); color:#fff;">P</span>
            <span>PayPal</span>
            <input type="radio" name="pay" value="paypal" checked />
          </label>
          <label class="pay-option" style="--brand-color:#ffb3c7; --brand-bg:#17120f;">
            <span class="pay-icon" style="background:linear-gradient(160deg, #ffc9d8, #ffb3c7); color:#0a0a0a;">K</span>
            <span>Klarna</span>
            <input type="radio" name="pay" value="klarna" />
          </label>
          <label class="pay-option" style="--brand-color:#ff9838; --brand-bg:#241f3d;">
            <span class="pay-icon pay-icon-cc" style="background:linear-gradient(160deg, #2a2a3d, #14141f);">
              <span class="cc-dot cc-dot-a"></span><span class="cc-dot cc-dot-b"></span>
            </span>
            <span>{t.checkout.creditCard}<span class="pay-sub">{t.checkout.creditCardSub}</span></span>
            <input type="radio" name="pay" value="kreditkarte" />
          </label>
          <label class="pay-option" style="--brand-color:#7fa8c9; --brand-bg:#3b5a76;">
            <span class="pay-icon pay-icon-emoji" style="background:linear-gradient(160deg, #4d7599, #2c4258);">🏦</span>
            <span>{t.checkout.bankTransfer}</span>
            <input type="radio" name="pay" value="ueberweisung" />
          </label>
        </div>

        <div class="pay-connect">
          <div class="pay-panel" data-panel="paypal">
            <p>{t.checkout.payPalHint}</p>
            <div id="paypal-button-container"></div>
          </div>
          <div class="pay-panel" data-panel="klarna" hidden>
            <p>{t.checkout.klarnaHint}</p>
            <button type="button" class="btn btn-outline pay-connect-btn" id="klarna-connect">{t.checkout.klarnaConnect}</button>
            <p class="pay-connect-status" id="klarna-status"></p>
          </div>
          <div class="pay-panel" data-panel="kreditkarte" hidden>
            <p>{t.checkout.cardHint}</p>
            <div class="card-fields">
              <div>
                <label for="cc-number">{t.checkout.cardNumber}</label>
                <input type="text" id="cc-number" inputmode="numeric" placeholder="1234 5678 9012 3456" maxlength="19" />
              </div>
              <div class="grid grid-2">
                <div><label for="cc-expiry">{t.checkout.cardExpiry}</label><input type="text" id="cc-expiry" placeholder="MM/YY" maxlength="5" /></div>
                <div><label for="cc-cvc">{t.checkout.cardCvc}</label><input type="text" id="cc-cvc" inputmode="numeric" placeholder="123" maxlength="4" /></div>
              </div>
            </div>
          </div>
          <div class="pay-panel" data-panel="ueberweisung" hidden>
            <p>{t.checkout.bankHintReal}</p>
            <div class="bank-details" id="bank-details"></div>
          </div>
        </div>

        </div>
        <div class="checkout-split-divider" aria-hidden="true"><span>🧵</span></div>
        <div class="checkout-split-col">
        <h3>{t.checkout.step1}</h3>
        <div><label for="email">{t.checkout.email}</label><input id="email" type="email" required /></div>
        <div class="grid grid-2">
          <div><label for="vorname">{t.checkout.firstName}</label><input id="vorname" type="text" required /></div>
          <div><label for="nachname">{t.checkout.lastName}</label><input id="nachname" type="text" required /></div>
        </div>
        <div><label for="strasse">{t.checkout.street}</label><input id="strasse" type="text" placeholder="1 Example Street" required /></div>
        <div class="grid grid-2">
          <div><label for="plz">{t.checkout.zip}</label><input id="plz" type="text" inputmode="numeric" maxlength="8" placeholder="SW1A 1AA" required /></div>
          <div><label for="ort">{t.checkout.city}</label><input id="ort" type="text" placeholder="London" required /></div>
        </div>
        <div>
          <label for="land">{t.checkout.country}</label>
          <select id="land">
            <option value="de">Germany</option>
            <option value="at">Austria</option>
            <option value="ch">Switzerland</option>
            <option value="lu">Luxembourg</option>
          </select>
        </div>

        </div>
        </div>

        <hr class="divider" />
        <h3>{t.checkout.step3}</h3>
        <div id="checkout-summary" class="checkout-summary"></div>
        <p class="small">{t.common.vatNote}</p>

        <div class="checkbox-row">
          <input id="agb" type="checkbox" required />
          <label for="agb">{t.checkout.agbPrefix} <a href="/agb/">{t.checkout.agbLink}</a> {t.checkout.agbSuffix}</label>
        </div>
        <div class="checkbox-row">
          <input id="widerruf" type="checkbox" required />
          <label for="widerruf">{t.checkout.revocationPrefix} <a href="/widerruf/">{t.checkout.revocationLink}</a> {t.checkout.revocationAnd} <a href="/datenschutz/">{t.checkout.privacyLink}</a> {t.checkout.revocationSuffix}</label>
        </div>

        <button class="btn btn-primary btn-block" type="submit">{t.checkout.orderButton}</button>
      </form>

      <aside class="card checkout-aside">
        <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>
        <hr class="divider stitched" />
        <h3>🚚 {t.checkout.shippingHintTitle}</h3>
        <p class="small">{t.checkout.shippingHint}</p>
        <a class="small" href="/en/versand-zahlung/">{t.checkout.shippingLink}</a>
      </aside>
    </div>
  </section>
</Layout>

<script define:vars={{ freeLabel: t.checkout.free, totalLabel: t.checkout.total, shippingLabel: t.cart.shipping, emptyCartAlert: t.checkout.emptyCartAlert, thankYouPath: "/en/checkout/danke/", checkoutLang: lang }}>
  // WICHTIG: define:vars-Skripte laufen als IIFE, keine "import"-Anweisungen möglich.
  window.__checkoutVars = { freeLabel, totalLabel, shippingLabel, emptyCartAlert, thankYouPath, checkoutLang, discountLabel, couponInvalid, couponAppliedTemplate, couponRemoveLabel, klarnaConnectLabel, klarnaConnectingLabel, klarnaConnectedLabel, bankHolderLabel, bankIbanLabel, bankBicLabel, bankBankNameLabel, bankPlaceholderLabel };
</script>
<script type="module">
  import { getCart, cartTotal, appliedCoupon, couponDiscount, setCouponCode, clearCoupon } from "../../../scripts/cart";
  import { formatPrice } from "../../../i18n/format";
  import { products } from "../../../data/products";
  import { berechneVersandkosten } from "../../../data/versand";
import { effektiverZeilenpreis } from "../../../data/rabatt";
import { bankverbindung, bankverbindungVollstaendig } from "../../../data/bankverbindung";

  const { freeLabel, totalLabel, shippingLabel, emptyCartAlert, thankYouPath, checkoutLang, discountLabel, couponInvalid, couponAppliedTemplate, couponRemoveLabel, klarnaConnectLabel, klarnaConnectingLabel, klarnaConnectedLabel, bankHolderLabel, bankIbanLabel, bankBicLabel, bankBankNameLabel, bankPlaceholderLabel } = window.__checkoutVars;

  const summary = document.getElementById("checkout-summary");
  const landSelect = document.getElementById("land");
  const cart = getCart();
  const subtotal = cartTotal();
  let currentTotal = 0;

  function renderSummary() {
    const land = landSelect.value;
    const shipping = cart.length === 0 ? 0 : berechneVersandkosten(land, cart.map((i) => ({ slug: i.slug, preis: i.preis, menge: i.menge })), products);
    const coupon = appliedCoupon();
    const discount = couponDiscount(subtotal);
    const total = Math.max(0, subtotal - discount) + shipping;
    currentTotal = total;

    summary.innerHTML = `
      ${cart.map((i) => {
        const produkt = products.find((p) => p.slug === i.slug);
        const zeilenpreis = produkt ? effektiverZeilenpreis(produkt, i.menge) : i.menge * i.preis;
        return `<div class="row"><span>${i.menge}× ${i.name}</span><span>${formatPrice(zeilenpreis, checkoutLang)}</span></div>`;
      }).join("")}
      ${coupon && discount > 0 ? `<div class="row"><span>${discountLabel}</span><span>-${formatPrice(discount, checkoutLang)}</span></div>` : ""}
      <div class="row"><span>${shippingLabel}</span><span>${shipping === 0 ? freeLabel : formatPrice(shipping, checkoutLang)}</span></div>
      <div class="row total"><span>${totalLabel}</span><span>${formatPrice(total, checkoutLang)}</span></div>
    `;

    const couponStatus = document.getElementById("coupon-status");
    const couponInput = document.getElementById("coupon-input");
    if (coupon && discount > 0) {
      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(); renderSummary(); });
    } else {
      couponStatus.textContent = couponInput.dataset.invalid === "1" ? couponInvalid : "";
    }
  }

  renderSummary();
  landSelect.addEventListener("change", renderSummary);

  // Zahlungsart-Auswahl: pro Methode ein Panel, nur die gewählte ist sichtbar. Macht die
  // Auswahl sofort "aktionabel" statt ein reines Formularfeld zu sein.
  const payPanels = document.querySelectorAll(".pay-panel");
  function showPayPanel(method) {
    payPanels.forEach((p) => { p.hidden = p.dataset.panel !== method; });
  }
  document.querySelectorAll('input[name="pay"]').forEach((radio) => {
    radio.addEventListener("change", () => showPayPanel(radio.value));
  });
  const initialPay = document.querySelector('input[name="pay"]:checked');
  if (initialPay) showPayPanel(initialPay.value);

  // PayPal: echte PayPal Smart Buttons über das offizielle JS-SDK (Sandbox-Client-ID "sb" —
  // kostenlos, ohne eigenes Konto testbar). Klick öffnet den echten PayPal-Login-Popup. Für den
  // Live-Betrieb muss hier nur "sb" durch VanVans echte (kostenlose) PayPal-Business-Client-ID
  // ersetzt werden, siehe developer.paypal.com.
  let paypalLoaded = false;
  function loadPayPalButtons() {
    if (paypalLoaded || !document.getElementById("paypal-button-container")) return;
    paypalLoaded = true;
    const script = document.createElement("script");
    script.src = "https://www.paypal.com/sdk/js?client-id=sb&currency=EUR&intent=capture";
    script.onload = () => {
      if (!window.paypal) return;
      window.paypal.Buttons({
        style: { layout: "vertical", color: "blue", shape: "pill", label: "paypal" },
        createOrder: (data, actions) => actions.order.create({
          purchase_units: [{ amount: { value: Math.max(0.01, currentTotal).toFixed(2), currency_code: "EUR" } }],
        }),
        onApprove: (data, actions) => actions.order.capture().then(() => { location.href = thankYouPath; }),
      }).render("#paypal-button-container");
    };
    document.head.appendChild(script);
  }
  loadPayPalButtons();

  // Klarna: echtes "Verbinden" braucht eine serverseitige Session mit VanVans Klarna-Händlerkonto
  // (Phase 2, Cloudflare Worker). Bis dahin ein sauber gestalteter Demo-Verbindungsablauf, damit
  // die Oberfläche schon fertig aussieht und 1:1 austauschbar ist, sobald die Anbindung steht.
  const klarnaBtn = document.getElementById("klarna-connect");
  const klarnaStatus = document.getElementById("klarna-status");
  if (klarnaBtn) {
    klarnaBtn.addEventListener("click", () => {
      klarnaBtn.disabled = true;
      klarnaBtn.textContent = klarnaConnectingLabel;
      setTimeout(() => {
        klarnaBtn.textContent = klarnaConnectLabel;
        klarnaBtn.disabled = false;
        klarnaStatus.textContent = "✅ " + klarnaConnectedLabel;
      }, 1100);
    });
  }

  // Banküberweisung (Vorkasse): braucht KEINE externe Anbindung — zeigt einfach VanVans echte,
  // im Adminbereich hinterlegte Kontodaten an. Das ist die einzige der vier Zahlungsarten, die
  // schon zu 100% "fertig" funktioniert.
  const bankDetailsEl = document.getElementById("bank-details");
  if (bankDetailsEl) {
    if (bankverbindungVollstaendig(bankverbindung)) {
      bankDetailsEl.innerHTML = `
        <div class="bank-row"><span>${bankHolderLabel}</span><span>${bankverbindung.kontoinhaber}</span></div>
        <div class="bank-row"><span>${bankIbanLabel}</span><span>${bankverbindung.iban}</span></div>
        ${bankverbindung.bic ? `<div class="bank-row"><span>${bankBicLabel}</span><span>${bankverbindung.bic}</span></div>` : ""}
        ${bankverbindung.bank ? `<div class="bank-row"><span>${bankBankNameLabel}</span><span>${bankverbindung.bank}</span></div>` : ""}
      `;
    } else {
      bankDetailsEl.innerHTML = `<p class="small">${bankPlaceholderLabel}</p>`;
    }
  }

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

  document.getElementById("checkout-form").addEventListener("submit", (e) => {
    e.preventDefault();
    if (cart.length === 0) {
      alert(emptyCartAlert);
      return;
    }
    location.href = thankYouPath;
  });
</script>