import type { Game } from './engine';

/** Physical card identity is not a lot identity: the same card can later
 * re-enter an ordinary auction. Return null when no current lot exists. */
export function originalAuctionInspectionLot(
  game: Pick<Game, 'richeseAuction' | 'auction' | 'turn'>,
): string | null {
  if (game.richeseAuction) return typeof game.richeseAuction.event === 'string'
    ? game.richeseAuction.event : null;
  const auction = game.auction;
  if (!auction || !Number.isSafeInteger(auction.index) || auction.index < 0 ||
      !Array.isArray(auction.cards) || !auction.cards[auction.index] ||
      typeof auction.cards[auction.index].id !== 'string') return null;
  return JSON.stringify([auction.occupiedEvent ?? game.turn, auction.index, auction.cards[auction.index].id]);
}