export const MKH_FRESH_DATA_CONTRACT_VERSION = 1;

const OUTDATED_BACKEND_MESSAGE = '本地后端版本过旧或更新后未重启，已停止展示可能过期的库存。'
  + '请停止当前 npm run remote:dev，拉取最新 main 后重新启动。';

export function requireMkhFreshContract(snapshot, { requireApplied = false } = {}) {
  const contractVersion = Number(snapshot?.freshDataContractVersion) || 0;
  if (contractVersion < MKH_FRESH_DATA_CONTRACT_VERSION) {
    throw new Error(OUTDATED_BACKEND_MESSAGE);
  }
  if (requireApplied && snapshot?.freshDataApplied !== true) {
    throw new Error('后端未确认已重读最新运营数据，已停止展示可能过期的库存，请重试。');
  }
  return snapshot;
}