import { Suspense } from 'react';
import { redirect } from 'next/navigation';
import { getServerSession } from '@/lib/auth/getServerSession';
import { PERMISSIONS } from '@/lib/permissions/permissions';
import AccessDenied from '@/components/admin/errors/AccessDenied';
import ProductForm from '@/components/admin/products/ProductForm';
import { ProductFormSkeleton } from '@/components/admin/products/ProductSkeleton';
import { cookies } from 'next/headers';
import Link from 'next/link';
import { SESSION_COOKIE } from '@/lib/auth/requireAuth';
import { Metadata } from 'next';

interface EditProductPageProps {
  params: Promise<{
    id: string;
  }>;
}

export const metadata: Metadata = {
  title: 'Edit Product',
};

async function getProduct(id: string, sessionToken: string) {
  try {
    const baseUrl = process.env.NEXT_PUBLIC_APP_URL || 'http://localhost:3000';
    const res = await fetch(`${baseUrl}/api/products/${id}`, {
      cache: 'no-store',
      headers: { Authorization: `Bearer ${sessionToken}` },
    });
    if (!res.ok) return null;
    const data = await res.json();
    console.log(data);
    return data.data;
  } catch (error) {
    console.error('Failed to fetch product:', error);
    return null;
  }
}

async function getFormData(sessionToken: string) {
  try {
    const baseUrl = process.env.NEXT_PUBLIC_APP_URL || 'http://localhost:3000';
    const res = await fetch(`${baseUrl}/api/products/form-data`, {
      cache: 'no-store',
      headers: { Authorization: `Bearer ${sessionToken}` },
    });
    if (!res.ok) throw new Error('Failed to fetch form data');
    const data = await res.json();
    return data.data;
  } catch (error) {
    console.error('Failed to fetch form data:', error);
    return {
      categories: [],
      tags: [],
      attributes: [],
      languages: [],
      default_language: 'en',
    };
  }
}

async function EditProductContent({ params }: EditProductPageProps) {
  const cookieStore = await cookies();
  const sessionId = cookieStore.get(SESSION_COOKIE)?.value;
  if (!sessionId) redirect('/admin/login');

  const session = await getServerSession();
  if (!session) redirect('/admin/login');
  
  if (!session.permissions.includes(PERMISSIONS.PRODUCTS_UPDATE)) {
    return <AccessDenied />;
  }
  
  const { id } = await params;
  const [product, formData] = await Promise.all([
    getProduct(id, sessionId),
    getFormData(sessionId),
  ]);
  
  if (!product) {
    return (
      <div className="sm:p-6">
        <div className="text-center py-12">
          <h2 className="text-xl font-semibold mb-2" style={{ color: 'var(--color-text)' }}>
            Product not found
          </h2>
          <p className="text-sm mb-6" style={{ color: 'var(--color-text-secondary)' }}>
            The product you&apos;re trying to edit doesn&apos;t exist or has been deleted.
          </p>
          <Link
            href="/admin/dashboard/products"
            className="inline-block px-4 py-2 rounded-lg text-sm font-medium transition-all hover:opacity-90"
            style={{ background: 'var(--color-cta)', color: 'white' }}
          >
            Back to Products
          </Link>
        </div>
      </div>
    );
  }
  
  return (
    <>
      <div className="mb-6">
        <h1 className="text-2xl font-semibold" style={{ color: 'var(--color-text)' }}>
          Edit Product
        </h1>
        <p className="text-sm mt-1" style={{ color: 'var(--color-text-secondary)' }}>
          Update product details, variations, images, and more
        </p>
      </div>
      
      <ProductForm 
        mode="edit" 
        initialData={product} 
        languages={formData.languages}
        categories={formData.categories}
        tags={formData.tags}
        attributes={formData.attributes}
        defaultLanguage={formData.default_language}
      />
    </>
  );
}

export default async function EditProductPage({ params }: EditProductPageProps) {
  return (
    <div className="sm:p-6">
      <Suspense fallback={<ProductFormSkeleton />}>
        <EditProductContent params={params} />
      </Suspense>
    </div>
  );
}