export async function GET(req: Request) {
  try {
    const url = new URL(req.url);
    const baseUrl = process.env.LEDGERONE_API_URL ?? "http://localhost:3051";
    const res = await fetch(`${baseUrl}/api/transactions${url.search}`);
    const body = await res.text();
    return new Response(body, {
      status: res.status,
      headers: {
        "Content-Type": res.headers.get("content-type") ?? "application/json"
      }
    });
  } catch {
    return new Response(
      JSON.stringify({
        data: [],
        meta: { timestamp: new Date().toISOString(), version: "v1" },
        error: { message: "Backend unavailable." }
      }),
      { status: 503, headers: { "Content-Type": "application/json" } }
    );
  }
}