// /app/api/bgremove/route.ts
import { NextResponse } from "next/server";

export const runtime = "nodejs";
export const dynamic = "force-dynamic";

const BGBYE_URL =
  process.env.BGBYE_URL ||
  process.env.BG_BYE_URL ||
  process.env.BGREMOVER_BASE_URL || // <-- support your existing env var
  "http://bgbye:7001";

export async function POST(req: Request) {
  try {
    const inForm = await req.formData();
    const method = String(inForm.get("method") || "");
    const file = inForm.get("file") as any;

    // Loosen the guard: some Node/undici builds return a File-like Blob from a different realm
    if (!file || !method) {
      return NextResponse.json({ error: "file and method are required" }, { status: 400 });
    }

    const outForm = new FormData();
    const filename = (file as any).name || "upload";
    outForm.set("method", method);
    outForm.set("file", file, filename);

    const res = await fetch(`${BGBYE_URL}/remove_background/`, { method: "POST", body: outForm });

    const buf = await res.arrayBuffer();
    return new NextResponse(buf, {
      status: res.status,
      headers: {
        "content-type": res.headers.get("content-type") || "application/octet-stream",
        "cache-control": "no-store",
      },
    });
  } catch (err: any) {
    return NextResponse.json({ error: String(err?.message || err) }, { status: 500 });
  }
}