"use client";

import { useEffect, useState } from "react";

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

export default function AdminProductsPage() {
  const [products, setProducts] = useState<Product[]>([]);
  const [loading, setLoading] = useState(false);
  const [message, setMessage] = useState("");

  async function loadProducts() {
    setLoading(true);
    setMessage("");
    try {
      const res = await fetch("/api/admin/products/list");
      const data = await res.json();
      if (!res.ok) throw new Error(data.error || "Failed to load products");
      setProducts(data.products || []);
    } catch (err: any) {
      setMessage(err.message || "Failed to load products.");
    } finally {
      setLoading(false);
    }
  }

  useEffect(() => {
    loadProducts();
  }, []);

  async function refreshFromStripe() {
    setLoading(true);
    setMessage("");
    try {
      const res = await fetch("/api/admin/products/refresh", { method: "POST" });
      const data = await res.json();
      if (!res.ok) throw new Error(data.error || "Failed to refresh products");
      await loadProducts();
    } catch (err: any) {
      setMessage(err.message || "Failed to refresh products.");
    } finally {
      setLoading(false);
    }
  }

  async function updateProduct(p: Product) {
    setLoading(true);
    setMessage("");
    try {
      const res = await fetch("/api/admin/products/update", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          productId: p.stripeProductId,
          name: p.name,
          description: p.description,
          unitAmount: p.unitAmount,
          active: p.active,
        }),
      });
      const data = await res.json();
      if (!res.ok) throw new Error(data.error || "Failed to update product");
      setMessage("Saved.");
    } catch (err: any) {
      setMessage(err.message || "Failed to update product.");
    } finally {
      setLoading(false);
    }
  }

  return (
    <main className="admin-page">
      <section className="section">
        <div className="container admin-page__inner">
          <h1 className="page-title">Admin: Product Cache</h1>
          <p className="connect-muted">
            This dashboard manages cached products shown on the storefront.
          </p>
          <div className="connect-actions">
            <button className="btn" onClick={refreshFromStripe} disabled={loading}>
              Refresh from Stripe
            </button>
            <button className="btn btn--ghost" onClick={loadProducts} disabled={loading}>
              Reload
            </button>
          </div>

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

          <div className="admin-grid">
            {products.map((p) => (
              <div key={p.stripeProductId} className="admin-card">
                <input
                  value={p.name}
                  onChange={(e) =>
                    setProducts((prev) =>
                      prev.map((item) =>
                        item.stripeProductId === p.stripeProductId
                          ? { ...item, name: e.target.value }
                          : item
                      )
                    )
                  }
                />
                <textarea
                  value={p.description || ""}
                  onChange={(e) =>
                    setProducts((prev) =>
                      prev.map((item) =>
                        item.stripeProductId === p.stripeProductId
                          ? { ...item, description: e.target.value }
                          : item
                      )
                    )
                  }
                />
                <div className="admin-row">
                  <input
                    type="number"
                    value={p.unitAmount}
                    onChange={(e) =>
                      setProducts((prev) =>
                        prev.map((item) =>
                          item.stripeProductId === p.stripeProductId
                            ? { ...item, unitAmount: Number(e.target.value) }
                            : item
                        )
                      )
                    }
                  />
                  <div className="admin-currency">{p.currency.toUpperCase()}</div>
                </div>
                <label className="admin-toggle">
                  <input
                    type="checkbox"
                    checked={p.active}
                    onChange={(e) =>
                      setProducts((prev) =>
                        prev.map((item) =>
                          item.stripeProductId === p.stripeProductId
                            ? { ...item, active: e.target.checked }
                            : item
                        )
                      )
                    }
                  />
                  Active on storefront
                </label>
                <button className="btn" onClick={() => updateProduct(p)} disabled={loading}>
                  Save
                </button>
              </div>
            ))}
            {!products.length && !loading ? (
              <div className="connect-muted">No cached products.</div>
            ) : null}
          </div>
        </div>
      </section>
    </main>
  );
}