(function (global) {
  var DEFAULT_REQUIRED_DAILY_FREE_ARTICLES = 2;

  function isTruthy(value) {
    return (
      value === true ||
      value === 1 ||
      value === '1' ||
      String(value).toLowerCase() === 'true'
    );
  }

  function firstDefined(source, keys) {
    if (!source || typeof source !== 'object') return undefined;

    for (var i = 0; i < keys.length; i += 1) {
      var key = keys[i];
      if (
        Object.prototype.hasOwnProperty.call(source, key) &&
        source[key] !== undefined &&
        source[key] !== null
      ) {
        return source[key];
      }
    }

    return undefined;
  }

  function toNumber(value, fallback) {
    var numberValue = Number(value);
    return Number.isFinite(numberValue) ? numberValue : fallback;
  }

  function buildQuotaReason(todayCount, requiredCount) {
    return (
      '今天需先发布' +
      requiredCount +
      '篇审核通过的免费文章后，才能发布付费文章（当前' +
      todayCount +
      '篇）'
    );
  }

  function parseSummary(userData, options) {
    var data = userData && typeof userData === 'object' ? userData : {};
    var config = options || {};
    var status = String(
      firstDefined(data, ['expertStatus', 'expert_status']) || ''
    ).toLowerCase();
    var isIntern = /实习|intern|trial/.test(status);
    var isRegularByStatus = /正式|regular|formal/.test(status);
    var isRegularExpert =
      isTruthy(
        firstDefined(data, [
          'is_regular_expert',
          'isRegularExpert',
          'regularExpert',
        ])
      ) || isRegularByStatus;
    var hasExpertIdentity =
      isTruthy(firstDefined(data, ['is_expert', 'isExpert', 'expert'])) ||
      isTruthy(
        firstDefined(data, [
          'is_regular_expert',
          'isRegularExpert',
          'regularExpert',
        ])
      ) ||
      isIntern ||
      isRegularByStatus;
    var requiredCount = toNumber(
      firstDefined(data, [
        'requiredDailyApprovedFreeArticleCount',
        'required_daily_approved_free_article_count',
      ]),
      config.requiredDailyFreeArticleCount || DEFAULT_REQUIRED_DAILY_FREE_ARTICLES
    );
    var todayCount = toNumber(
      firstDefined(data, [
        'todayApprovedFreeArticleCount',
        'today_approved_free_article_count',
      ]),
      0
    );
    var quotaExemptRaw = firstDefined(data, [
      'payArticleFreeQuotaExempt',
      'pay_article_free_quota_exempt',
    ]);
    var canPublishRaw = firstDefined(data, [
      'canPublishPayArticle',
      'can_publish_pay_article',
    ]);
    var backendReason = String(
      firstDefined(data, [
        'payArticlePublishReason',
        'pay_article_publish_reason',
      ]) || ''
    );
    var quotaExempt = isTruthy(quotaExemptRaw);
    var hasBackendPaidDecision = canPublishRaw !== undefined;
    var canPaid = false;
    var paidReason = '';

    if (quotaExempt) {
      canPaid = true;
    } else if (hasBackendPaidDecision) {
      canPaid = isTruthy(canPublishRaw);
      paidReason = canPaid
        ? ''
        : backendReason ||
          (!hasExpertIdentity || !isRegularExpert
            ? '正式专家才能发布付费文章'
            : buildQuotaReason(todayCount, requiredCount));
    } else if (!hasExpertIdentity || !isRegularExpert) {
      paidReason = '正式专家才能发布付费文章';
    } else {
      canPaid = todayCount >= requiredCount;
      paidReason = canPaid ? '' : buildQuotaReason(todayCount, requiredCount);
    }

    return {
      hasExpertIdentity: hasExpertIdentity,
      isRegularExpert: hasExpertIdentity && isRegularExpert,
      canFree: hasExpertIdentity,
      canPaid: canPaid,
      quotaExempt: quotaExempt,
      todayFreeArticleCount: todayCount,
      requiredDailyFreeArticleCount: requiredCount,
      paidReason: paidReason,
      reason: paidReason,
    };
  }

  global.PublishPermission = {
    isTruthy: isTruthy,
    parseSummary: parseSummary,
  };
})(typeof window !== 'undefined' ? window : globalThis);