import type { SimulationFunction } from '@x12i/api-simulator';
import { checkoutsForMember, findBook } from '../state/checkout-ledger.js';

/** GET /members/:memberId/checkouts -- a small join across the ledger and catalog. */
export const memberCheckouts: SimulationFunction = ({ request }) => {
  const memberId = request.params.memberId ?? '';
  const items = checkoutsForMember(memberId).map((record) => ({
    ...record,
    title: findBook(record.bookId)?.title ?? 'Unknown title'
  }));

  return { status: 200, body: { memberId, count: items.length, items } };
};