// POST /api/echo — echoes back the request body with server metadata.
export async function API_post(req: Request): Promise<Response> {
  let body: unknown = null;

  try {
    body = await req.json();
  } catch {
    return Response.json(
      { error: "Invalid JSON body" },
      { status: 400 },
    );
  }

  return Response.json({
    echo: body,
    server: {
      time: new Date().toISOString(),
      method: req.method,
      headers: Object.fromEntries(req.headers.entries()),
    },
  });
}

// GET /api/echo — returns usage instructions.
export async function API_get(req: Request): Promise<Response> {
  return Response.json({
    usage: "POST a JSON body to this endpoint to see it echoed back.",
    example: { text: "hello", timestamp: "2026-04-11T00:00:00Z" },
  });
}