import ProductPage from "../../../components/ProductPage";
import { productService } from "../../../lib/services/productService";
import type { Metadata } from 'next';
import { Suspense } from 'react';
import { getSeoConfig, formatPageTitle } from "../../../lib/seo";

export async function generateMetadata(
  { params }: { params: Promise<{ slug: string }> }
): Promise<Metadata> {
  const resolvedParams = await params;
  const product = await productService.getProductBySlug(resolvedParams.slug);
  const config = await getSeoConfig();

  if (!product) {
    return {
      title: formatPageTitle('مکمل درمانی یافت نشد', config.brandNameFa, config.titleSeparator, config.titlePosition),
    };
  }

  const nameFa = product.nameFa || product.name;
  const nameEn = product.nameEn ? ` (${product.nameEn})` : '';
  const rawTitle = `${nameFa}${nameEn}`;
  const title = formatPageTitle(rawTitle, config.brandNameFa, config.titleSeparator, config.titlePosition, false);
  const description = (product.shortDescription || product.description || '').substring(0, 155).trim() || config.defaultMetaDescription;
  const rawKeywords = (product as unknown as Record<string, unknown>).keywords;
  const keywords = typeof rawKeywords === 'string' ? rawKeywords.split(',').map(k => k.trim()) : (product.main_ingredients || config.keywords);
  const canonicalUrl = `${config.canonicalBaseUrl.replace(/\/$/, '')}/shop/${resolvedParams.slug}`;

  return {
    title,
    description,
    keywords,
    openGraph: {
      title,
      description,
      images: [product.image || config.ogImageUrl],
      url: canonicalUrl,
      siteName: config.brandNameFa,
      type: "website",
    },
    alternates: {
      canonical: canonicalUrl,
    }
  };
}

export default async function ShopProductPage({ params }: { params: Promise<{ slug: string }> }) {
  const resolvedParams = await params;
  const product = await productService.getProductBySlug(resolvedParams.slug);
  
  if (!product) {
    return <ProductPage productSlug={resolvedParams.slug} />;
  }

  const siteUrl = process.env.NEXT_PUBLIC_SITE_URL || 'https://canina.ir';
  const productUrl = `${siteUrl}/shop/${resolvedParams.slug}`;
  const priceInRial = product.priceValue * 10;

  const productJsonLd = {
    '@context': 'https://schema.org',
    '@type': 'Product',
    name: product.nameFa || product.name,
    image: product.image,
    description: product.shortDescription || product.description,
    sku: product.artNo,
    mpn: product.artNo,
    brand: {
      '@type': 'Brand',
      name: 'Canina pharma GmbH'
    },
    category: product.category,
    offers: {
      '@type': 'Offer',
      url: productUrl,
      priceCurrency: 'IRR',
      price: priceInRial,
      availability: 'https://schema.org/InStock',
      itemCondition: 'https://schema.org/NewCondition',
      seller: {
        '@type': 'Organization',
        name: 'کنینا ایران'
      }
    }
  };

  const breadcrumbJsonLd = {
    '@context': 'https://schema.org',
    '@type': 'BreadcrumbList',
    itemListElement: [
      {
        '@type': 'ListItem',
        position: 1,
        name: 'صفحه اصلی',
        item: siteUrl
      },
      {
        '@type': 'ListItem',
        position: 2,
        name: 'فروشگاه مکمل‌ها',
        item: `${siteUrl}/shop`
      },
      {
        '@type': 'ListItem',
        position: 3,
        name: product.nameFa || product.name,
        item: productUrl
      }
    ]
  };

  const safeProductJsonLd = JSON.stringify(productJsonLd).replace(/</g, '\\u003c');
  const safeBreadcrumbJsonLd = JSON.stringify(breadcrumbJsonLd).replace(/</g, '\\u003c');

  return (
    <>
      <script
        type="application/ld+json"
        dangerouslySetInnerHTML={{ __html: safeProductJsonLd }}
      />
      <script
        type="application/ld+json"
        dangerouslySetInnerHTML={{ __html: safeBreadcrumbJsonLd }}
      />
      <Suspense fallback={
        <div className="min-h-screen bg-medical-gray-50 p-6 max-w-7xl mx-auto font-vazir" dir="rtl">
          <div className="animate-pulse space-y-6">
            <div className="h-8 bg-medical-gray-200 rounded-2xl w-48" />
            <div className="grid md:grid-cols-12 gap-8">
              <div className="md:col-span-5 h-80 bg-white border border-medical-gray-200 rounded-[2.5rem]" />
              <div className="md:col-span-7 space-y-4">
                <div className="h-10 bg-medical-gray-200 rounded-2xl w-3/4" />
                <div className="h-6 bg-medical-gray-100 rounded-xl w-1/2" />
                <div className="h-24 bg-medical-gray-100 rounded-2xl w-full" />
              </div>
            </div>
          </div>
        </div>
      }>
        <ProductPage productSlug={resolvedParams.slug} />
      </Suspense>
    </>
  );
}