import Link from 'next/link'
import { getPayload } from 'payload'
import configPromise from '@payload-config'
import { clearFrontendCache } from './admin-cache-actions'

const QUICK_LINKS = [
  {
    description: 'Manage hero modules, featured products, support panels, and homepage news surfaces.',
    href: '/admin/globals/homepage',
    title: 'Homepage',
  },
  {
    description: 'Open core product records, templates, editor-driven pages, downloads, reviews, and videos.',
    href: '/admin/collections/products',
    title: 'Products',
  },
  {
    description: 'Review firmware, manuals, online-upgrade entries, and release-note content.',
    href: '/admin/collections/downloads',
    title: 'Downloads',
  },
  {
    description: 'Keep support landing copy, FAQ content, contact instructions, and warranty policy aligned.',
    href: '/admin/globals/supportPage',
    title: 'Support',
  },
  {
    description: 'Track incoming after-sales, distributor, and OEM requests in one operations lane.',
    href: '/admin/collections/afterServiceRequests',
    title: 'Operations',
  },
  {
    description: 'Publish news, maintain redirects, and keep site-wide branding settings consistent.',
    href: '/admin/collections/news',
    title: 'Publishing',
  },
] as const

const WORKSTREAMS = [
  'Template-backed products: keep local template assignments stable and manage hero/card media from the product record.',
  'Editor-driven products: use the imported legacy HTML as the rebuild reference, then move final content into overview and structured fields.',
  'Downloads: maintain release notes, package links, online-upgrade guidance, and product visibility together.',
  'Social proof: attach videos and reviews directly to each product so the frontend tabs stay complete.',
] as const

function formatCount(value: number) {
  return new Intl.NumberFormat('en-US').format(value)
}

async function getOverviewCounts() {
  const payload = await getPayload({ config: configPromise })

  const [
    products,
    downloads,
    productVideos,
    productReviews,
    news,
    faqs,
    dealers,
    afterServiceRequests,
    distributorRequests,
    oemRequests,
  ] = await Promise.all([
    payload.count({ collection: 'products' }),
    payload.count({ collection: 'downloads' }),
    payload.count({ collection: 'productVideos' }),
    payload.count({ collection: 'productReviews' }),
    payload.count({ collection: 'news' }),
    payload.count({ collection: 'faqs' }),
    payload.count({ collection: 'dealers' }),
    payload.count({ collection: 'afterServiceRequests' }),
    payload.count({ collection: 'distributorRequests' }),
    payload.count({ collection: 'oemRequests' }),
  ])

  return [
    { eyebrow: 'Catalog', href: '/admin/collections/products', title: 'Products', value: products.totalDocs },
    { eyebrow: 'Catalog', href: '/admin/collections/downloads', title: 'Downloads', value: downloads.totalDocs },
    { eyebrow: 'Social Proof', href: '/admin/collections/productVideos', title: 'Product Videos', value: productVideos.totalDocs },
    { eyebrow: 'Social Proof', href: '/admin/collections/productReviews', title: 'Product Reviews', value: productReviews.totalDocs },
    { eyebrow: 'Publishing', href: '/admin/collections/news', title: 'News', value: news.totalDocs },
    { eyebrow: 'Support', href: '/admin/collections/faqs', title: 'FAQs', value: faqs.totalDocs },
    { eyebrow: 'Sales', href: '/admin/collections/dealers', title: 'Dealers', value: dealers.totalDocs },
    {
      eyebrow: 'Operations',
      href: '/admin/collections/afterServiceRequests',
      title: 'Requests',
      value: afterServiceRequests.totalDocs + distributorRequests.totalDocs + oemRequests.totalDocs,
    },
  ]
}

export async function AdminHome({ cacheCleared = false }: { cacheCleared?: boolean }) {
  const stats = await getOverviewCounts()

  return (
    <div className="studio-home">
      <section className="studio-home__hero">
        <div>
          <p className="studio-home__eyebrow">Eversolo Content Studio</p>
          <h1 className="studio-home__title">A cleaner control room for products, publishing, and support.</h1>
          <p className="studio-home__lede">
            This workspace keeps template-backed products, CMS-built pages, firmware updates, reviews,
            videos, and support operations in one place.
          </p>
        </div>
        <div className="studio-home__actions">
          <Link className="studio-home__primary" href="/admin/collections/products">
            Open products
          </Link>
          <Link className="studio-home__secondary" href="/admin/globals/homepage">
            Edit homepage
          </Link>
          <form action={clearFrontendCache}>
            <input type="hidden" name="returnTo" value="/admin" />
            <button className="studio-home__secondary studio-home__secondary--warm" type="submit">
              Clear frontend cache
            </button>
          </form>
        </div>
      </section>

      {cacheCleared ? (
        <section className="studio-home__notice" aria-live="polite">
          Frontend cache cleared. Refresh the storefront to confirm the latest content, ordering, and homepage feeds.
        </section>
      ) : null}

      <section className="studio-home__stats">
        {stats.map((stat) => (
          <Link key={stat.title} href={stat.href} className="studio-home__stat-card">
            <span className="studio-home__stat-eyebrow">{stat.eyebrow}</span>
            <strong className="studio-home__stat-value">{formatCount(stat.value)}</strong>
            <span className="studio-home__stat-title">{stat.title}</span>
          </Link>
        ))}
      </section>

      <section className="studio-home__grid">
        <div className="studio-home__panel">
          <div className="studio-home__panel-head">
            <h2>Priority lanes</h2>
            <p>Jump into the surfaces that drive the storefront most often.</p>
          </div>
          <div className="studio-home__link-list">
            {QUICK_LINKS.map((item) => (
              <Link key={item.href} className="studio-home__link-card" href={item.href}>
                <strong>{item.title}</strong>
                <span>{item.description}</span>
              </Link>
            ))}
          </div>
        </div>

        <div className="studio-home__panel">
          <div className="studio-home__panel-head">
            <h2>Editorial guidance</h2>
            <p>Keep the admin team working the same way across templates, downloads, and support.</p>
          </div>
          <ul className="studio-home__checklist">
            {WORKSTREAMS.map((item) => (
              <li key={item}>{item}</li>
            ))}
          </ul>
        </div>
      </section>
    </div>
  )
}