import { NextResponse } from "next/server";
import { auth } from "@/lib/auth";
import { saveUploadedFile, UploadError } from "@/lib/upload";
import { uploadKindSchema } from "@/lib/validations/upload";

export const runtime = "nodejs";

export async function POST(request: Request) {
  const session = await auth();
  if (!session?.user) {
    return NextResponse.json({ error: "Unauthorized." }, { status: 401 });
  }

  try {
    const formData = await request.formData();
    const kindResult = uploadKindSchema.safeParse(formData.get("kind"));
    const file = formData.get("file");

    if (!kindResult.success || !(file instanceof File)) {
      return NextResponse.json({ error: "A valid upload kind and file are required." }, { status: 400 });
    }

    const uploadedFile = await saveUploadedFile(file, kindResult.data);
    return NextResponse.json(uploadedFile, { status: 201 });
  } catch (error) {
    if (error instanceof UploadError) {
      return NextResponse.json({ error: error.message }, { status: error.statusCode });
    }

    console.error("Upload failed", error);
    return NextResponse.json({ error: "The file could not be uploaded." }, { status: 500 });
  }
}