(function (root, factory) {
  // 推广内容模块同时服务应用介绍、下载页和公告详情页。
  if (typeof module === 'object' && module.exports) {
    module.exports = factory(root);
    return;
  }

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

  var documentRef = root.document;

  function normalizeList(data) {
    // 推广接口使用通用列表响应，兼容后端常见数组包裹字段。
    if (Array.isArray(data)) return data;
    if (!data || typeof data !== 'object') return [];
    if (Array.isArray(data.rows)) return data.rows;
    if (Array.isArray(data.records)) return data.records;
    if (Array.isArray(data.list)) return data.list;
    if (Array.isArray(data.data)) return data.data;
    return [];
  }

  function pick(item, keys, fallback) {
    var source = item || {};
    var index;
    var value;

    for (index = 0; index < keys.length; index += 1) {
      value = source[keys[index]];
      if (value !== undefined && value !== null && value !== '') return value;
    }

    return fallback || '';
  }

  function escapeHtml(value) {
    // 标题、摘要、链接等普通文本进入 HTML 前统一转义。
    return String(value === undefined || value === null ? '' : value)
      .replace(/&/g, '&amp;')
      .replace(/</g, '&lt;')
      .replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;')
      .replace(/'/g, '&#39;');
  }

  function getApi() {
    return root.GenealogyApi && root.GenealogyApi.defaultClient;
  }

  function query(selector, rootNode) {
    return (rootNode || documentRef).querySelector(selector);
  }

  function showMessage(message) {
    if (root.layui && root.layui.layer) {
      root.layui.layer.msg(message);
      return;
    }

    root.alert(message);
  }

  function getQueryParam(search, name) {
    var params = new URLSearchParams(String(search || '').replace(/^\?/, ''));

    return params.get(name) || '';
  }

  function getPromotionId(item) {
    return String(pick(item, ['promotionId', 'id', 'articleId'], ''));
  }

  function getTitle(item) {
    return pick(item, ['promotionTitle', 'title', 'name'], '推广内容');
  }

  function getSummary(item) {
    return pick(item, ['summary', 'description', 'promotionDesc', 'remark'], '了解平台最新内容与应用服务。');
  }

  function getContent(item) {
    return pick(item, ['promotionContent', 'content', 'articleContent'], '<p>暂无详细内容</p>');
  }

  function getTime(item) {
    return pick(item, ['publishTime', 'createTime', 'updateTime'], '');
  }

  function getLink(item, fallback) {
    return pick(item, ['linkUrl', 'url', 'targetUrl'], fallback || 'notice-detail.html?id=' + encodeURIComponent(getPromotionId(item)));
  }

  function getCover(item) {
    return pick(item, ['coverUrl', 'coverImage', 'imageUrl', 'bannerUrl'], 'public/images/app-home.png');
  }

  function buildPromotionCard(item) {
    var title = getTitle(item);
    var summary = getSummary(item);
    var time = getTime(item);
    var link = getLink(item);

    return '<a class="promotion-card" href="' + escapeHtml(link) + '" data-promotion-id="' + escapeHtml(getPromotionId(item)) + '">' +
      '<img src="' + escapeHtml(getCover(item)) + '" alt="' + escapeHtml(title) + '" />' +
      '<div><h3>' + escapeHtml(title) + '</h3><p>' + escapeHtml(summary) + '</p><span>' + escapeHtml(time) + '</span></div></a>';
  }

  function buildDownloadCard(item) {
    var title = getTitle(item);
    var summary = getSummary(item);
    var link = getLink(item, 'download.html');

    return '<a class="card soft download-card tilt-card" href="' + escapeHtml(link) + '" data-promotion-id="' + escapeHtml(getPromotionId(item)) + '">' +
      '<h3>' + escapeHtml(title) + '</h3><p>' + escapeHtml(summary) + '</p></a>';
  }

  function pickPromotion(list, promotionId) {
    var items = normalizeList(list);
    var id = String(promotionId || '');
    var index;

    if (!items.length) return null;
    if (!id) return items[0];

    for (index = 0; index < items.length; index += 1) {
      if (getPromotionId(items[index]) === id) return items[index];
    }

    return items[0];
  }

  function buildNoticeDetail(item) {
    return {
      title: getTitle(item),
      summary: getSummary(item),
      content: getContent(item),
      time: getTime(item)
    };
  }

  function renderPromotionCards(items) {
    var container = query('[data-promotion-list]');
    var list = normalizeList(items);

    if (!container) return;
    if (!list.length) {
      container.innerHTML = '<div class="api-empty">暂无推广内容</div>';
      return;
    }

    container.innerHTML = list.map(buildPromotionCard).join('');
  }

  function renderDownloadCards(items) {
    var container = query('[data-promotion-download-list]');
    var list = normalizeList(items);

    if (!container) return;
    if (!list.length) {
      container.innerHTML = '<div class="api-empty">暂无下载推广内容</div>';
      return;
    }

    container.innerHTML = list.map(buildDownloadCard).join('');
  }

  function renderNoticeDetail(items) {
    var search = root.location && root.location.search;
    var selected = pickPromotion(items, getQueryParam(search, 'id'));
    var detail = selected ? buildNoticeDetail(selected) : null;
    var title = query('[data-promotion-title]');
    var summary = query('[data-promotion-summary]');
    var content = query('[data-promotion-content]');
    var time = query('[data-promotion-time]');

    if (!detail) return;
    if (title) title.textContent = detail.title;
    if (summary) summary.textContent = detail.summary;
    if (content) content.innerHTML = detail.content;
    if (time) time.textContent = detail.time || '发布时间待定';
  }

  async function loadPromotions() {
    var api = getApi();
    var data;

    if (!api) return;

    try {
      data = await api.promotions();
      renderPromotionCards(data);
      renderDownloadCards(data);
      renderNoticeDetail(data);
    } catch (error) {
      showMessage(error.message || '推广内容加载失败');
    }
  }

  function init() {
    if (!documentRef || !query('[data-promotion-page]')) return;

    loadPromotions();
  }

  return {
    normalizeList: normalizeList,
    buildPromotionCard: buildPromotionCard,
    buildDownloadCard: buildDownloadCard,
    pickPromotion: pickPromotion,
    buildNoticeDetail: buildNoticeDetail,
    init: init
  };
});