import type { MetadataRoute } from "next";
import { getAllPageSlugs, getAllPostSlugs } from "./lib/payload";

const SITE_URL = "https://einfach-produktiv.mk360.de";

// Every indexable static route in this repo. Deliberately excludes:
// - transactional/session pages already marked `robots: noindex` in their
//   own page.tsx (checkout, checkout/verarbeitung, cart, bestellbestaetigung,
//   newsletter-confirmed, company-settings-preview, /konto/*) — Google
//   explicitly advises against listing noindex URLs in a sitemap.
// - /sticker/[code] and /r/[code]: redirect-only routes with no content of
//   their own (see resolveAndTrackRedirect), not pages to index.
// - /email-preview/[type]: internal template-preview tool, not customer-facing.
// - /blog/[slug] and /[slug] (Payload Pages): appended dynamically below.
const STATIC_ROUTES = [
  "",
  "/blog",
  "/shop",
  "/newsletter",
  "/todo-cards",
  "/der-eine",
  "/tasse-die-pause",
  "/die-sieben",
  "/einfach-anfangen",
  "/7-tage-klarheits-check",
  "/sticker",
  "/agb",
  "/datenschutz",
  "/impressum",
  "/versand",
  "/widerruf",
];

// New routes only ever need adding in one of two places from now on: a
// plain static page.tsx goes in STATIC_ROUTES above; anything authored
// through Payload (a Pages doc or a blog Post) shows up here automatically
// the next time this regenerates — no code change needed for those.
export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
  const [pages, posts] = await Promise.all([getAllPageSlugs(), getAllPostSlugs()]);

  const staticEntries: MetadataRoute.Sitemap = STATIC_ROUTES.map((path) => ({
    url: `${SITE_URL}${path}`,
    changeFrequency: path === "" ? "daily" : "weekly",
    priority: path === "" ? 1 : 0.7,
  }));

  const pageEntries: MetadataRoute.Sitemap = pages.map(({ slug, updatedAt }) => ({
    url: `${SITE_URL}/${slug}`,
    lastModified: updatedAt,
    changeFrequency: "monthly",
    priority: 0.6,
  }));

  const postEntries: MetadataRoute.Sitemap = posts.map(({ slug, updatedAt }) => ({
    url: `${SITE_URL}/blog/${slug}`,
    lastModified: updatedAt,
    changeFrequency: "monthly",
    priority: 0.5,
  }));

  return [...staticEntries, ...pageEntries, ...postEntries];
}