---
import Layout from "../../layouts/Layout.astro";
import AddToCartButton from "../../components/AddToCartButton.astro";
import { getProductByHandle, getDefaultRegion } from "../../lib/medusa";
import { formatEUR, formatGrundpreis } from "../../lib/format";

export const prerender = false;

const { handle } = Astro.params;
const region = await getDefaultRegion();
const product = handle ? await getProductByHandle(handle, region.id) : null;

if (!product) {
  return Astro.redirect("/shop");
}

const infoByVariant = Object.fromEntries(
  product.variants.map((variant) => [
    variant.id,
    {
      price: variant.calculated_price ? formatEUR(variant.calculated_price.calculated_amount) : "",
      grundpreis:
        variant.calculated_price && variant.metadata?.net_weight_grams
          ? formatGrundpreis(variant.calculated_price.calculated_amount, variant.metadata.net_weight_grams)
          : null,
    },
  ])
);
const initial = infoByVariant[product.variants[0]?.id] ?? { price: "", grundpreis: null };
const deliveryTime = product.metadata?.delivery_time;

const gallery = (product.images?.length ? product.images.map((i) => i.url) : product.thumbnail ? [product.thumbnail] : []);
---

<Layout title={product.title} description={product.description ?? product.title}>
  <section class="mx-auto max-w-6xl px-4 sm:px-6 lg:px-8 py-8 sm:py-12">
    <nav class="flex items-center gap-2 text-sm text-brand-text-muted">
      <a href="/shop" class="hover:text-brand-primary transition-colors">Shop</a>
      <span>/</span>
      {product.metadata?.category && (
        <>
          <span>{product.metadata.category}</span>
          <span>/</span>
        </>
      )}
      <span class="text-brand-text">{product.title}</span>
    </nav>

    <div class="mt-8 grid gap-12 sm:grid-cols-2">
      <div>
        <div id="main-image" class="aspect-square rounded-2xl bg-brand-surface overflow-hidden">
          {gallery[0] && <img src={gallery[0]} alt={product.title} class="h-full w-full object-cover" />}
        </div>
        {gallery.length > 1 && (
          <div class="mt-4 flex gap-3">
            {gallery.map((url, index) => (
              <button
                class:list={[
                  "gallery-thumb h-16 w-16 rounded-lg overflow-hidden ring-2 transition-colors",
                  index === 0 ? "ring-brand-primary" : "ring-transparent",
                ]}
                data-src={url}
              >
                <img src={url} alt="" class="h-full w-full object-cover" />
              </button>
            ))}
          </div>
        )}
      </div>

      <div>
        {product.metadata?.category && (
          <p class="text-xs font-semibold uppercase tracking-[0.2em] text-brand-accent">{product.metadata.category}</p>
        )}
        <h1 class="mt-2 text-3xl font-semibold text-brand-ink">{product.title}</h1>

        <div class="mt-3 flex items-baseline gap-3">
          <p id="product-price" class="text-2xl font-semibold text-brand-primary">{initial.price}</p>
          <span class="text-sm text-brand-text-muted">inkl. MwSt.</span>
        </div>
        <p id="product-grundpreis" class="mt-1 text-sm text-brand-text-muted">{initial.grundpreis ?? ""}</p>

        <p class="mt-6 text-brand-text whitespace-pre-line">{product.description}</p>

        <div class="mt-8">
          <AddToCartButton variants={product.variants} regionId={region.id} />
        </div>

        <div class="mt-8 grid gap-3 sm:grid-cols-2">
          {deliveryTime && (
            <p class="flex items-center gap-2 text-sm text-brand-text-muted">
              <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 shrink-0" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 10V3L4 14h7v7l9-11h-7z" />
              </svg>
              Lieferzeit: {deliveryTime}
            </p>
          )}
          <p class="flex items-center gap-2 text-sm text-brand-text-muted">
            <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 shrink-0" fill="none" viewBox="0 0 24 24" stroke="currentColor">
              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7" />
            </svg>
            Regional aus Hamburg
          </p>
          <p class="flex items-center gap-2 text-sm text-brand-text-muted">
            <svg xmlns="http://www.w3.org/2000/svg" class="h-4 w-4 shrink-0" fill="none" viewBox="0 0 24 24" stroke="currentColor">
              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M5 13l4 4L19 7" />
            </svg>
            Nachhaltig produziert
          </p>
        </div>
      </div>
    </div>
  </section>

  <script type="application/json" id="variant-info" set:html={JSON.stringify(infoByVariant)} />
</Layout>

<script>
  const priceEl = document.getElementById("product-price");
  const grundpreisEl = document.getElementById("product-grundpreis");
  const infoJson = document.getElementById("variant-info")?.textContent;

  if (priceEl && grundpreisEl && infoJson) {
    const info: Record<string, { price: string; grundpreis: string | null }> = JSON.parse(infoJson);
    document.querySelectorAll<HTMLInputElement>('input[name="variant"]').forEach((input) => {
      input.addEventListener("change", () => {
        const entry = info[input.value];
        priceEl.textContent = entry?.price ?? "";
        grundpreisEl.textContent = entry?.grundpreis ?? "";
      });
    });
  }

  const mainImage = document.querySelector<HTMLImageElement>("#main-image img");
  document.querySelectorAll<HTMLButtonElement>(".gallery-thumb").forEach((thumb) => {
    thumb.addEventListener("click", () => {
      if (mainImage && thumb.dataset.src) mainImage.src = thumb.dataset.src;
      document.querySelectorAll(".gallery-thumb").forEach((t) => {
        t.classList.remove("ring-brand-primary");
        t.classList.add("ring-transparent");
      });
      thumb.classList.remove("ring-transparent");
      thumb.classList.add("ring-brand-primary");
    });
  });
</script>