import { NextResponse } from "next/server";
import { writeFile, mkdir } from "node:fs/promises";
import path from "node:path";

export async function POST(request: Request) {
  const formData = await request.formData();
  const file = formData.get("file") as File | null;
  if (!file) return NextResponse.json({ error: "No file" }, { status: 400 });

  const bytes = await file.arrayBuffer();
  const ext = path.extname(file.name) || ".png";
  const filename = `${Date.now()}-${Math.random().toString(36).substring(2, 7)}${ext}`;
  const uploadDir = path.join(process.cwd(), "public", "quiz-images", "uploads");
  await mkdir(uploadDir, { recursive: true });
  await writeFile(path.join(uploadDir, filename), Buffer.from(bytes));

  return NextResponse.json({ url: `/quiz-images/uploads/${filename}` });
}