import type { MetadataRoute } from "next";
import { getAllBlogPosts } from "./content";
import { sitemapUrl } from "./siteMetadata";
import { USE_CASE_DETAIL_SLUGS } from "./useCaseSyntheticPost";

const STATIC_PUBLIC_PATHS = [
  "/",
  "/about",
  "/learn",
  "/templates",
  "/blog",
  "/use-cases",
  "/how-it-works",
  "/privacy",
  "/terms",
  "/cookies",
] as const;

/**
 * Public marketing URLs for `/sitemap.xml`, plus listed published rules when
 * the caller supplies them. Omits signed-in product routes (`/create`,
 * `/login`, `/profile`), admin, and unlisted guest-claim `/rules/[id]`.
 */
export function buildPublicSitemap(
  listedRules: ReadonlyArray<{ id: string; updatedAt: Date }> = [],
): MetadataRoute.Sitemap {
  const entries: MetadataRoute.Sitemap = STATIC_PUBLIC_PATHS.map((path) => ({
    url: sitemapUrl(path),
  }));

  for (const post of getAllBlogPosts()) {
    entries.push({
      url: sitemapUrl(`/blog/${post.slug}`),
      lastModified: post.lastModified,
    });
  }

  for (const slug of USE_CASE_DETAIL_SLUGS) {
    entries.push({ url: sitemapUrl(`/use-cases/${slug}`) });
    entries.push({ url: sitemapUrl(`/use-cases/${slug}/rule`) });
  }

  for (const rule of listedRules) {
    entries.push({
      url: sitemapUrl(`/rules/${encodeURIComponent(rule.id)}`),
      lastModified: rule.updatedAt,
    });
  }

  return entries;
}