(function (root, factory) {
  // 相册模块同时支持浏览器页面和 Node 单元测试。
  if (typeof module === 'object' && module.exports) {
    module.exports = factory(root);
    return;
  }

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

  var documentRef = root.document;
  var selectedAlbumId = '';

  function normalizeList(data) {
    // 相册接口列表响应兼容数组、rows、records、list、data。
    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) {
    // 相册名称和照片说明进入 innerHTML 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 queryAll(selector, rootNode) {
    return Array.prototype.slice.call((rootNode || documentRef).querySelectorAll(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 getCurrentGenealogyId() {
    var search = root.location && root.location.search;
    var page = query('[data-album-page], [data-promo-album-page]');

    return getQueryParam(search, 'genealogyId') ||
      (page && page.getAttribute('data-genealogy-id')) ||
      getQueryParam(search, 'id') ||
      '';
  }

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

    return text || undefined;
  }

  function toNumber(value, fallback) {
    var text = String(value === undefined || value === null ? '' : value).trim();
    var number = Number(text);

    return text && Number.isFinite(number) ? number : fallback;
  }

  function buildAlbumBody(values) {
    // AlbumBody 来自 APP.openapi.json，albumName 必填。
    var source = values || {};

    return {
      albumName: String(source.albumName || '').trim(),
      albumDesc: trimOrUndefined(source.albumDesc),
      coverOssId: toNumber(source.coverOssId),
      sortOrder: toNumber(source.sortOrder, 1),
      status: String(source.status || '').trim() || '0'
    };
  }

  function buildPhotoBody(values) {
    // AlbumPhotoBody 来自 APP.openapi.json，ossId 必填。
    var source = values || {};

    return {
      ossId: toNumber(source.ossId),
      photoTitle: trimOrUndefined(source.photoTitle),
      photoDesc: trimOrUndefined(source.photoDesc),
      photographer: trimOrUndefined(source.photographer),
      shootTime: trimOrUndefined(source.shootTime),
      sortOrder: toNumber(source.sortOrder, 1),
      status: String(source.status || '').trim() || '0'
    };
  }

  function getAlbumId(item) {
    return pick(item, ['albumId', 'id'], '');
  }

  function buildAlbumRow(item) {
    var albumId = getAlbumId(item);
    var name = pick(item, ['albumName', 'name'], '未命名相册');
    var photoCount = pick(item, ['photoCount', 'photos'], '0');
    var desc = pick(item, ['albumDesc', 'description'], '暂无说明');

    return '<button class="module-row album-row" type="button" data-album-id="' + escapeHtml(albumId) + '">' +
      '<div><h3>' + escapeHtml(name) + '</h3><p>' + escapeHtml(photoCount) + ' 张照片 · ' + escapeHtml(desc) + '</p></div>' +
      '<span class="pill">管理</span></button>';
  }

  function buildPhotoRow(item) {
    var title = pick(item, ['photoTitle', 'title'], '未命名照片');
    var desc = pick(item, ['photoDesc', 'description'], '暂无说明');
    var photographer = pick(item, ['photographer'], '未记录拍摄人');

    return '<div class="module-row album-photo-row"><div><h3>' + escapeHtml(title) + '</h3><p>' + escapeHtml(desc) + ' · ' + escapeHtml(photographer) + '</p></div><span class="pill">照片</span></div>';
  }

  function renderAlbums(items) {
    var container = query('[data-album-list], [data-promo-album-list]');
    var list = normalizeList(items);

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

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

  function renderPhotos(items) {
    var container = query('[data-album-photo-list]');
    var list = normalizeList(items);

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

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

  function getFormValues(form) {
    var values = {};

    queryAll('[name]', form).forEach(function (field) {
      values[field.name] = field.value;
    });

    return values;
  }

  async function loadAlbums() {
    var api = getApi();
    var genealogyId = getCurrentGenealogyId();

    if (!api || !genealogyId) return;

    try {
      renderAlbums(await api.albums(genealogyId));
    } catch (error) {
      showMessage(error.message || '相册加载失败');
    }
  }

  async function loadPhotos(albumId) {
    var api = getApi();
    var genealogyId = getCurrentGenealogyId();

    if (!api || !genealogyId || !albumId) return;

    selectedAlbumId = albumId;
    try {
      renderPhotos(await api.albumPhotos(genealogyId, albumId));
    } catch (error) {
      showMessage(error.message || '照片加载失败');
    }
  }

  async function submitAlbum(form) {
    var api = getApi();
    var genealogyId = getCurrentGenealogyId();
    var body = buildAlbumBody(getFormValues(form));

    if (!api || !genealogyId) {
      showMessage('请从具体家谱进入相册管理');
      return;
    }

    if (!body.albumName) {
      showMessage('请填写相册名称');
      return;
    }

    try {
      if (selectedAlbumId) {
        await api.updateAlbum(genealogyId, selectedAlbumId, body);
      } else {
        await api.createAlbum(genealogyId, body);
      }

      form.reset();
      selectedAlbumId = '';
      showMessage('相册已保存');
      loadAlbums();
    } catch (error) {
      showMessage(error.message || '保存相册失败');
    }
  }

  async function submitPhoto(form) {
    var api = getApi();
    var genealogyId = getCurrentGenealogyId();
    var body = buildPhotoBody(getFormValues(form));

    if (!api || !genealogyId || !selectedAlbumId) {
      showMessage('请先选择相册');
      return;
    }

    if (!body.ossId) {
      showMessage('请填写照片 OSS ID');
      return;
    }

    try {
      await api.createAlbumPhoto(genealogyId, selectedAlbumId, body);
      form.reset();
      showMessage('照片已添加');
      loadPhotos(selectedAlbumId);
    } catch (error) {
      showMessage(error.message || '添加照片失败');
    }
  }

  function bindActions() {
    if (!documentRef) return;

    documentRef.addEventListener('click', function (event) {
      var albumButton = event.target.closest('[data-album-id]');

      if (!albumButton) return;
      event.preventDefault();
      loadPhotos(albumButton.getAttribute('data-album-id'));
    });

    documentRef.addEventListener('submit', function (event) {
      var albumForm = event.target.closest('[data-album-form]');
      var photoForm = event.target.closest('[data-album-photo-form]');

      if (albumForm) {
        event.preventDefault();
        submitAlbum(albumForm);
      }

      if (photoForm) {
        event.preventDefault();
        submitPhoto(photoForm);
      }
    });
  }

  function init() {
    if (!documentRef) return;

    bindActions();
    loadAlbums();
  }

  return {
    normalizeList: normalizeList,
    buildAlbumBody: buildAlbumBody,
    buildPhotoBody: buildPhotoBody,
    buildAlbumRow: buildAlbumRow,
    init: init
  };
});