import { NextResponse } from "next/server";

const FLASK_URL = process.env.FLASK_BACKEND_URL || "http://127.0.0.1:8000";

export async function POST(request: Request) {
  try {
    const body = await request.json();

    const res = await fetch(`${FLASK_URL}/predict`, {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify(body),
    });

    if (!res.ok) {
      const errText = await res.text();
      return NextResponse.json(
        { error: `Flask backend error: ${errText}` },
        { status: res.status },
      );
    }

    const data = await res.json();
    return NextResponse.json(data);
  } catch (error) {
    console.error("Proxy error:", error);
    return NextResponse.json(
      { error: "Failed to connect to prediction backend. Is the Flask server running?" },
      { status: 502 },
    );
  }
}