import { NextRequest, NextResponse } from "next/server";
import { getApiUrlFromRequest, getPaymentConfig } from "@/config/services.config";

function resolvePayApiUrl(request: NextRequest): string {
  const hostHeader =
    request.headers.get("host") || request.headers.get("x-forwarded-host");
  return (
    (hostHeader ? getApiUrlFromRequest(hostHeader) : null) ||
    getPaymentConfig().apiUrl
  ).replace(/\/$/, "");
}

export async function POST(request: NextRequest) {
  try {
    const formData = await request.formData();
    const image = formData.get("image");
    if (!(image instanceof File)) {
      return NextResponse.json(
        { ok: false, error: "缺少图片文件 image" },
        { status: 400 }
      );
    }

    const payload = new FormData();
    payload.append("image", image, image.name || "proof.jpg");

    const apiUrl = resolvePayApiUrl(request);
    const res = await fetch(`${apiUrl}/nomadvip/recognize_discount_proof`, {
      method: "POST",
      body: payload,
      cache: "no-store",
    });

    const data = await res.json().catch(() => ({}));
    if (!res.ok) {
      return NextResponse.json(
        { ok: false, error: data?.error || "识别服务异常" },
        { status: res.status }
      );
    }
    return NextResponse.json(data);
  } catch (error) {
    return NextResponse.json(
      {
        ok: false,
        error: error instanceof Error ? error.message : "识别请求失败",
      },
      { status: 500 }
    );
  }
}