/** 微信服务号订阅暗号（精确匹配，忽略首尾与中间空白）。 */

export const PUSH_SUBSCRIPTION_SECRET_CODES = Object.freeze({
  morningSubscribe: '美丽心情',
  newsImmediate: '新闻早报',
});

function normalizeSecretCodeText(text) {
  return String(text ?? '').trim().replace(/\s+/g, '');
}

/**
 * 解析订阅暗号。
 * @returns {{ kind: 'morning_subscribe' }|{ kind: 'news_immediate' }|null}
 */
export function parsePushSubscriptionSecretCode(text) {
  const compact = normalizeSecretCodeText(text);
  if (!compact) return null;
  if (compact === PUSH_SUBSCRIPTION_SECRET_CODES.morningSubscribe) {
    return { kind: 'morning_subscribe' };
  }
  if (compact === PUSH_SUBSCRIPTION_SECRET_CODES.newsImmediate) {
    return { kind: 'news_immediate' };
  }
  return null;
}