import type { MetadataRoute } from "next";
import { API_URL } from "@/config/constants";
import { getAvailablePlaceConfigs } from "@/app/facilityData";
import { buildAbsoluteUrl } from "@/app/seo";

type SitemapFacility = {
  slug?: string;
  status_updated_at?: string | null;
  vtg_updated_at?: string | null;
};

const staticRoutes: MetadataRoute.Sitemap = [
  {
    url: buildAbsoluteUrl("/"),
    lastModified: new Date(),
    changeFrequency: "daily",
    priority: 1,
  },
  {
    url: buildAbsoluteUrl("/golfbaner"),
    lastModified: new Date(),
    changeFrequency: "daily",
    priority: 0.95,
  },
  {
    url: buildAbsoluteUrl("/medlemskap"),
    lastModified: new Date(),
    changeFrequency: "daily",
    priority: 0.8,
  },
  {
    url: buildAbsoluteUrl("/vtg"),
    lastModified: new Date(),
    changeFrequency: "daily",
    priority: 0.8,
  },
];

export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
  let facilities: SitemapFacility[] = [];

  try {
    const res = await fetch(`${API_URL}/facilities`, { cache: "no-store" });
    if (res.ok) {
      const data = await res.json();
      facilities = Array.isArray(data) ? data : [];
    }
  } catch {
    facilities = [];
  }

  const placeRoutes = getAvailablePlaceConfigs().map((slug) => ({
    url: buildAbsoluteUrl(`/sted/${slug}`),
    lastModified: new Date(),
    changeFrequency: "daily" as const,
    priority: slug === "norge" ? 0.9 : 0.75,
  }));

  const facilityRoutes = facilities
    .filter((facility) => Boolean(facility.slug))
    .map((facility) => ({
      url: buildAbsoluteUrl(`/golfbaner/${facility.slug}`),
      lastModified: facility.status_updated_at || facility.vtg_updated_at || new Date(),
      changeFrequency: "daily" as const,
      priority: 0.7,
    }));

  return [...staticRoutes, ...placeRoutes, ...facilityRoutes];
}