import { NextResponse } from "next/server";
import { auth } from "@/auth";
import {
  createAssetModel,
  listAssetModels,
  validateCreateAssetModelInput,
} from "@/lib/asset-models";

// Mirrors src/app/api/asset-category-attribute-defs/route.ts's pattern —
// middleware.ts excludes /api from route protection, so this checks the
// session itself. Flat permission model (CLAUDE.md): only "logged in or
// not", no role check.
export async function POST(request: Request): Promise<NextResponse> {
  const session = await auth();
  if (!session) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }

  let body: unknown;
  try {
    body = await request.json();
  } catch {
    return NextResponse.json({ error: "Request body must be valid JSON" }, { status: 400 });
  }

  if (typeof body !== "object" || body === null) {
    return NextResponse.json({ error: "Request body must be a JSON object" }, { status: 400 });
  }

  const { categoryId, manufacturer, name, specs } = body as Record<string, unknown>;
  const validation = validateCreateAssetModelInput({ categoryId, manufacturer, name, specs });

  if (!validation.ok) {
    return NextResponse.json({ error: validation.error }, { status: 400 });
  }

  const created = await createAssetModel(validation.value);
  if (!created.ok) {
    return NextResponse.json({ error: created.error }, { status: 400 });
  }
  return NextResponse.json(created.value, { status: 201 });
}

export async function GET(): Promise<NextResponse> {
  const session = await auth();
  if (!session) {
    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
  }

  const assetModels = await listAssetModels();
  return NextResponse.json(assetModels, { status: 200 });
}