(function (root, factory) {
  if (typeof module === 'object' && module.exports) {
    module.exports = factory(root);
    return;
  }

  root.AppPromotionPages = factory(root);
  if (root.document) {
    root.document.addEventListener('DOMContentLoaded', function () {
      root.AppPromotionPages.init();
    });
  }
})(typeof globalThis !== 'undefined' ? globalThis : window, function (root) {
  'use strict';

  function escapeHtml(value) {
    return String(value === undefined || value === null ? '' : value)
      .replace(/&/g, '&')
      .replace(/</g, '&lt;')
      .replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;')
      .replace(/'/g, '&#39;');
  }

  function normalizeId(value) {
    var normalized;

    if (typeof value === 'number' && !Number.isSafeInteger(value)) return '';
    if (value === undefined || value === null) return '';
    normalized = String(value).trim();
    return /^[1-9][0-9]*$/.test(normalized) ? normalized : '';
  }

  function text(value) {
    return value === undefined || value === null ? '' : String(value).trim();
  }

  function normalizeTargetUrl(value) {
    var normalized = text(value);
    var parsed;

    if (!normalized) return '';
    try {
      parsed = new URL(normalized);
    } catch (error) {
      return '';
    }
    return parsed.protocol === 'http:' || parsed.protocol === 'https:' ? parsed.href : '';
  }

  function normalizePromotion(item) {
    var source = item || {};
    var promotionId = normalizeId(source.promotionId);
    var promotionTitle = text(source.promotionTitle);

    if (!promotionId || !promotionTitle || String(source.status) !== '0') return null;
    return {
      promotionId: promotionId,
      promotionTitle: promotionTitle,
      promotionDesc: text(source.promotionDesc),
      targetUrl: normalizeTargetUrl(source.targetUrl)
    };
  }

  function normalizePromotionList(data) {
    var items;

    if (!Array.isArray(data)) return [];
    items = data.map(normalizePromotion);
    return items.some(function (item) { return !item; }) ? [] : items;
  }

  function renderPromotionCard(item) {
    var content = '<div><h3>' + escapeHtml(item.promotionTitle) + '</h3>' +
      '<p>' + escapeHtml(item.promotionDesc) + '</p></div>';

    if (!item.targetUrl) {
      return '<article class="promotion-card" data-promotion-id="' +
        escapeHtml(item.promotionId) + '">' + content + '</article>';
    }
    return '<a class="promotion-card" data-promotion-id="' + escapeHtml(item.promotionId) +
      '" href="' + escapeHtml(item.targetUrl) +
      '" target="_blank" rel="noopener noreferrer">' + content + '</a>';
  }

  function renderPromotionList(data) {
    var items = normalizePromotionList(data);

    if (!items.length) return '<div class="api-empty">当前暂无应用推广</div>';
    return items.map(renderPromotionCard).join('');
  }

  function renderPromotionLoginRequired() {
    return '<div class="api-empty">登录后可查看应用推广，<a href="login.html">立即登录</a></div>';
  }

  async function loadPromotions(api) {
    var data;
    var items;

    if (!api || typeof api.promotions !== 'function') throw new Error('应用推广接口不可用');
    data = await api.promotions({ platform: 'pc' });
    items = normalizePromotionList(data);
    if (!Array.isArray(data) || items.length !== data.length) {
      throw new Error('推广列表响应无效');
    }
    return items;
  }

  function isUnauthorized(error) {
    return Number(error && (error.status || error.code)) === 401;
  }

  async function init() {
    var page = root.document && root.document.querySelector('[data-promotion-page]');
    var list = root.document && root.document.querySelector('[data-promotion-list]');
    var api = root.GenealogyApi && root.GenealogyApi.defaultClient;

    if (!page || !list) return;
    if (!api || !api.getToken || !api.getToken()) {
      list.innerHTML = renderPromotionLoginRequired();
      return;
    }

    try {
      list.classList.add('is-loading');
      list.innerHTML = renderPromotionList(await loadPromotions(api));
    } catch (error) {
      if (isUnauthorized(error)) {
        if (api.clearToken) api.clearToken();
        list.innerHTML = renderPromotionLoginRequired();
        return;
      }
      list.innerHTML = '<div class="api-empty">应用推广读取失败，请稍后重试</div>';
    } finally {
      list.classList.remove('is-loading');
    }
  }

  return {
    normalizePromotion: normalizePromotion,
    normalizePromotionList: normalizePromotionList,
    normalizeTargetUrl: normalizeTargetUrl,
    renderPromotionList: renderPromotionList,
    renderPromotionLoginRequired: renderPromotionLoginRequired,
    loadPromotions: loadPromotions,
    isUnauthorized: isUnauthorized,
    init: init
  };
});