import { buyPlane, performAction } from '@/lib/game/actions';

// POST /api/market/buy-plane (v0.8.0) — body { model: string }. Buys a catalog
// aircraft at full price; it arrives 'available' with a full tank at the home base
// (EDDF). 400 missing/non-string model or unknown catalog model; 409 insufficient
// funds. On success returns the full state snapshot (new plane + reduced cash).

export async function POST(req: Request) {
  let body: unknown;
  try {
    const text = await req.text();
    body = text ? JSON.parse(text) : {};
  } catch {
    return Response.json({ error: 'invalid JSON body' }, { status: 400 });
  }
  if (typeof body !== 'object' || body === null || Array.isArray(body)) {
    return Response.json({ error: 'body must be a JSON object' }, { status: 400 });
  }
  const input = body as Record<string, unknown>;
  for (const key of Object.keys(input)) {
    if (key !== 'model') {
      return Response.json({ error: `unknown field "${key}"` }, { status: 400 });
    }
  }
  if (typeof input.model !== 'string' || input.model.length === 0) {
    return Response.json({ error: 'model must be a non-empty string' }, { status: 400 });
  }

  const model = input.model;
  return performAction(req, (inst) => buyPlane(inst, model));
}