"use client";

import { useEffect, useState } from "react";

type Product = {
  id: string;
  name: string;
  description?: string | null;
  unitAmount?: number | null;
  currency?: string | null;
  stripePriceId?: string | null;
};

export default function StorefrontPage({ params }: { params: { accountId: string } }) {
  const { accountId: slug } = params;
  const [products, setProducts] = useState<Product[]>([]);
  const [loading, setLoading] = useState(false);
  const [message, setMessage] = useState("");
  const [accountId, setAccountId] = useState("");

  useEffect(() => {
    if (slug) {
      window.localStorage.setItem("connectStoreSlug", slug);
    }
    async function load() {
      setLoading(true);
      setMessage("");
      try {
        const lookup = await fetch(`/api/connect/account/lookup?slug=${slug}`);
        const lookupData = await lookup.json();
        if (!lookup.ok) throw new Error(lookupData.error || "Store not found");
        setAccountId(lookupData.accountId);

        const res = await fetch(`/api/storefront/products?slug=${slug}`);
        const data = await res.json();
        if (!res.ok) throw new Error(data.error || "Failed to load products");
        const normalized =
          data.products?.map((p: any) => ({
            id: p.stripeProductId ?? p.id,
            name: p.name,
            description: p.description,
            unitAmount: p.unitAmount ?? p.default_price?.unit_amount ?? null,
            currency: p.currency ?? p.default_price?.currency ?? null,
            stripePriceId: p.stripePriceId ?? p.default_price?.id ?? null,
          })) || [];
        setProducts(normalized);
      } catch (err: any) {
        setMessage(err.message || "Failed to load products.");
      } finally {
        setLoading(false);
      }
    }
    load();
  }, [slug]);

  async function buyNow(product: Product) {
    if (!product.unitAmount || !product.currency || !accountId) {
      setMessage("Product is missing a price.");
      return;
    }
    setLoading(true);
    setMessage("");
    try {
      const res = await fetch("/api/connect/checkout", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
          body: JSON.stringify({
            accountId,
            name: product.name,
            description: product.description,
            unitAmount: product.unitAmount,
            currency: product.currency,
            quantity: 1,
          }),
        });
      const data = await res.json();
      if (!res.ok) throw new Error(data.error || "Failed to start checkout");
      window.location.href = data.url;
    } catch (err: any) {
      setMessage(err.message || "Checkout failed.");
    } finally {
      setLoading(false);
    }
  }

  async function addToCart(product: Product) {
    if (!product.unitAmount || !product.currency || !product.stripePriceId) {
      setMessage("Product is missing a price.");
      return;
    }
    setLoading(true);
    setMessage("");
    try {
      const res = await fetch("/api/cart/add", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          slug,
          productId: product.id,
          priceId: product.stripePriceId,
          name: product.name,
          unitAmount: product.unitAmount,
          currency: product.currency,
          quantity: 1,
        }),
      });
      const data = await res.json();
      if (!res.ok) throw new Error(data.error || "Failed to add to cart");
      setMessage("Added to cart.");
    } catch (err: any) {
      setMessage(err.message || "Failed to add to cart.");
    } finally {
      setLoading(false);
    }
  }

  return (
    <main className="storefront-page">
      <section className="section">
        <div className="container storefront-page__inner">
          <h1 className="page-title">Storefront</h1>
          <p className="storefront-muted">
            Store: {slug} (mapped to a connected account)
          </p>

          {message ? <div className="connect-message">{message}</div> : null}

          <div className="storefront-grid">
            {products.map((product) => (
              <div key={product.id} className="storefront-card">
                <h3>{product.name}</h3>
                <p>{product.description || "No description provided."}</p>
                <div className="storefront-price">
                  {product.unitAmount
                    ? `${(product.unitAmount / 100).toFixed(2)} ${product.currency?.toUpperCase() || "USD"}`
                    : "No price"}
                </div>
                <div className="storefront-actions">
                  <button className="btn" onClick={() => buyNow(product)} disabled={loading}>
                    Buy now (Checkout)
                  </button>
                  <a
                    className="btn btn--ghost"
                    href={`/storefront/${slug}/pay?productId=${product.id}`}
                  >
                    Pay with card
                  </a>
                  <button
                    className="btn btn--ghost"
                    onClick={() => addToCart(product)}
                    disabled={loading}
                  >
                    Add to cart
                  </button>
                  <a className="btn btn--ghost" href="/cart">
                    View cart
                  </a>
                </div>
              </div>
            ))}
            {!products.length && !loading ? (
              <div className="storefront-muted">No products yet.</div>
            ) : null}
          </div>
        </div>
      </section>
    </main>
  );
}