/**
 * Optional, dev-only SEO sanity check — NOT part of the build or deploy
 * pipeline, never blocks production. Run manually:
 *
 *   npm run seo:check
 *
 * Only ever warns; exits 0 regardless of findings (a content gap here isn't
 * a broken deploy).
 */
import { getPayload } from "payload";
import config from "../payload.config";

let warnings = 0;

function warn(message: string) {
  warnings++;
  console.warn(`  ⚠ ${message}`);
}

async function checkCollection(
  payload: Awaited<ReturnType<typeof getPayload>>,
  collection: "offers" | "events" | "posts",
  label: string,
) {
  console.log(`${label}:`);
  const { docs } = await payload.find({ collection, limit: 500, depth: 0 });

  const slugCounts = new Map<string, number>();
  for (const doc of docs as { slug?: string | null; title?: string }[]) {
    if (doc.slug) slugCounts.set(doc.slug, (slugCounts.get(doc.slug) ?? 0) + 1);
  }
  for (const [slug, count] of slugCounts) {
    if (count > 1) warn(`Slug „${slug}“ kommt ${count}× vor.`);
  }

  for (const doc of docs as { slug?: string | null; title?: string; seo?: { description?: string | null } | null }[]) {
    if (!doc.title?.trim()) warn(`Dokument ohne Titel (slug: ${doc.slug ?? "—"}).`);
    if (!doc.slug?.trim()) warn(`Dokument ohne Slug: „${doc.title ?? "—"}“.`);
  }

  if (docs.length === 0) console.log("  (keine Einträge)");
}

async function checkMedia(payload: Awaited<ReturnType<typeof getPayload>>) {
  console.log("Medien (Alt-Texte):");
  const { docs } = await payload.find({ collection: "media", limit: 1000, depth: 0 });
  const missingAlt = (docs as { alt?: string; filename?: string }[]).filter((doc) => !doc.alt?.trim());
  if (missingAlt.length === 0) {
    console.log("  Alle Bilder haben einen Alt-Text.");
  } else {
    for (const doc of missingAlt) warn(`Bild ohne Alt-Text: ${doc.filename ?? "unbekannt"}`);
  }
}

async function run() {
  const payload = await getPayload({ config });

  await checkCollection(payload, "offers", "Angebote");
  await checkCollection(payload, "events", "Termine");
  await checkCollection(payload, "posts", "Aktuelles");
  await checkMedia(payload);

  console.log(`\n${warnings === 0 ? "Keine Auffälligkeiten gefunden." : `${warnings} Hinweis(e) gefunden — siehe oben.`}`);
  process.exit(0);
}

run().catch((err) => {
  console.error(err);
  process.exit(0);
});