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

  var documentRef = root.document;

  function normalizeList(data) {
    // VIP 列表接口使用通用 ListResult，兼容 rows、records、list、data 等常见包裹。
    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) {
    // 套餐名、说明和订单号进入 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 trimOrUndefined(value) {
    var text = String(value === undefined || value === null ? '' : value).trim();

    return text || undefined;
  }

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

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

  function formatPrice(value) {
    var number = Number(value);

    if (!Number.isFinite(number)) return '价格待定';
    return '￥' + number;
  }

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

    return duration ? duration + '天' : '有效期见套餐说明';
  }

  function formatPayType(value) {
    var map = {
      wechat: '微信支付',
      alipay: '支付宝',
      balance: '余额支付'
    };
    var key = String(value || '').trim();

    return map[key] || key || '支付方式待确认';
  }

  function buildVipOrderBody(values) {
    // VipOrderBody 来自 APP.openapi.json，packageId 必填，genealogyId 和 payType 可选。
    var source = values || {};

    return {
      packageId: toNumberOrUndefined(source.packageId),
      genealogyId: toNumberOrUndefined(source.genealogyId),
      payType: trimOrUndefined(source.payType)
    };
  }

  function getPackageId(item) {
    return pick(item, ['packageId', 'vipPackageId', 'id'], '');
  }

  function buildPackageCard(item) {
    var packageId = getPackageId(item);
    var name = pick(item, ['packageName', 'name', 'title'], '会员套餐');
    var price = pick(item, ['price', 'salePrice', 'amount'], '');
    var duration = pick(item, ['durationDays', 'validDays', 'days'], '');
    var description = pick(item, ['description', 'packageDesc', 'remark'], '开通后享受会员服务权益');

    return '<button class="vip-package-card" type="button" data-vip-package-id="' + escapeHtml(packageId) + '">' +
      '<span class="vip-package-name">' + escapeHtml(name) + '</span>' +
      '<strong>' + escapeHtml(formatPrice(price)) + '</strong>' +
      '<small>' + escapeHtml(formatDuration(duration)) + '</small>' +
      '<p>' + escapeHtml(description) + '</p></button>';
  }

  function buildOrderRow(item) {
    var orderNo = pick(item, ['orderNo', 'orderSn', 'id'], '订单号待返回');
    var packageName = pick(item, ['packageName', 'vipPackageName', 'name'], 'VIP 订单');
    var payType = formatPayType(pick(item, ['payType', 'paymentType'], ''));
    var status = pick(item, ['orderStatus', 'status', 'payStatus'], '状态待确认');

    return '<div class="module-row vip-order-row"><div><h3>' + escapeHtml(packageName) + '</h3><p>' +
      escapeHtml(orderNo) + ' · ' + escapeHtml(payType) + ' · ' + escapeHtml(status) +
      '</p></div><span class="pill">订单</span></div>';
  }

  function renderPackages(items) {
    var container = query('[data-vip-package-list]');
    var list = normalizeList(items);

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

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

  function renderOrders(items) {
    var container = query('[data-vip-order-list]');
    var list = normalizeList(items);

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

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

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

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

    return values;
  }

  function setOrderStatus(message) {
    var status = query('[data-vip-order-status]');

    if (status) status.textContent = message;
  }

  async function loadVipData() {
    var api = getApi();

    if (!api) return;

    try {
      renderPackages(await api.vipPackages());
      renderOrders(await api.vipOrders());
    } catch (error) {
      showMessage(error.message || '会员服务加载失败');
    }
  }

  function selectPackage(button) {
    var packageId = button.getAttribute('data-vip-package-id') || '';
    var field = query('[name="packageId"]');

    queryAll('[data-vip-package-id]').forEach(function (item) {
      item.classList.remove('is-selected');
    });
    button.classList.add('is-selected');
    if (field) field.value = packageId;
  }

  async function submitOrder(form) {
    var api = getApi();
    var body = buildVipOrderBody(getFormValues(form));

    if (!api) return;
    if (!body.packageId) {
      showMessage('请选择会员套餐');
      return;
    }

    try {
      await api.createVipOrder(body);
      setOrderStatus('订单已创建，请继续完成支付');
      showMessage('会员订单已创建');
      renderOrders(await api.vipOrders());
    } catch (error) {
      showMessage(error.message || '会员订单创建失败');
    }
  }

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

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

      if (!packageButton) return;
      selectPackage(packageButton);
    });

    documentRef.addEventListener('submit', function (event) {
      var form = event.target.closest('[data-vip-order-form]');

      if (!form) return;
      event.preventDefault();
      submitOrder(form);
    });
  }

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

    bindActions();
    loadVipData();
  }

  return {
    normalizeList: normalizeList,
    buildVipOrderBody: buildVipOrderBody,
    buildPackageCard: buildPackageCard,
    buildOrderRow: buildOrderRow,
    init: init
  };
});