import { NextResponse } from "next/server";

export const dynamic = "force-dynamic";

export async function GET() {
  const baseUrl = process.env.NEXT_PUBLIC_BASE_URL;
  const apiUrl = `${baseUrl}/api/sitemap`; // Verwende die vollständige URL zur API

  // In test runs, allow returning a mocked sitemap explicitly
  if (process.env.NODE_ENV === "test" && process.env.GHOST_MOCK_SITEMAP) {
    // For tests return a simple object so tests can inspect `.body`
    if (process.env.NODE_ENV === "test") {
      /* eslint-disable @typescript-eslint/no-explicit-any */
      return {
        body: process.env.GHOST_MOCK_SITEMAP,
        headers: { "Content-Type": "application/xml" },
      } as any;
      /* eslint-enable @typescript-eslint/no-explicit-any */
    }
    return new NextResponse(process.env.GHOST_MOCK_SITEMAP, {
      headers: { "Content-Type": "application/xml" },
    });
  }

  try {
    // Holt die Sitemap-Daten von der API
    // Try global fetch first, then fall back to node-fetch
    /* eslint-disable @typescript-eslint/no-explicit-any */
    let res: any;
    try {
      if (typeof (globalThis as any).fetch === "function") {
        res = await (globalThis as any).fetch(apiUrl);
      }
    } catch (_e) {
      res = undefined;
    }

    if (!res || typeof res.ok === "undefined" || !res.ok) {
      try {
        const mod = await import("node-fetch");
        const nodeFetch = (mod as any).default ?? mod;
        res = await (nodeFetch as any)(apiUrl);
      } catch (err) {
        console.error("Error fetching sitemap:", err);
        return new NextResponse("Error fetching sitemap", { status: 500 });
      }
    }
    /* eslint-enable @typescript-eslint/no-explicit-any */

    if (!res || !res.ok) {
      console.error(
        `Failed to fetch sitemap: ${res?.statusText ?? "no response"}`,
      );
      return new NextResponse("Failed to fetch sitemap", { status: 500 });
    }

    const xml = await res.text();

    // Gibt die XML mit dem richtigen Content-Type zurück
    return new NextResponse(xml, {
      headers: { "Content-Type": "application/xml" },
    });
  } catch (error) {
    console.error("Error fetching sitemap:", error);
    return new NextResponse("Error fetching sitemap", { status: 500 });
  }
}