const auth = require('../../../utils/auth');
const { formatDateTime } = require('../../../utils/format');

const STATUS_MAP = {
  0: '待支付',
  1: '已支付',
  2: '支付失败',
  3: '已退款',
  4: '已取消'
};

Page({
  data: {
    registrations: [],
    registrationsLoading: false,
    registrationsLoadingText: '加载中...',
    pageNo: 1,
    pageSize: 10,
    hasMore: true
  },

  onShow() {
    const accessToken = wx.getStorageSync('accessToken') || '';
    if (!accessToken) {
      wx.redirectTo({ url: '/subpackages/mine/login/login' });
      return;
    }
    if (!this.data.registrations || this.data.registrations.length === 0) {
      this.initData();
    }
  },

  onPullDownRefresh() {
    
    this.initData(true).finally(() => wx.stopPullDownRefresh());
  },

  initData(reset = false) {
    if (reset) {
      this.setData({
        registrations: [],
        pageNo: 1,
        hasMore: true,
        registrationsLoadingText: '加载中...'
      });
    }
    return this.loadRegistrations(reset ? 1 : this.data.pageNo, reset);
  },

  loadRegistrations(pageNo, reset = false) {
    if (this.data.registrationsLoading) return Promise.resolve();
    if (!this.data.hasMore && !reset) return Promise.resolve();

    if (reset) {
      this.setData({ pageNo, registrationsLoading: true });
    } else {
      this.setData({ registrationsLoading: true });
    }

    const pageSize = this.data.pageSize;

    return auth
      .fetchMyRegistrations({ pageNo, pageSize })
      .then((page) => {
        const rows = (page && Array.isArray(page.rows) ? page.rows : []).map((r) => {
          return {
            ...r,
            registrationTimeText: formatDateTime(r.registrationTime),
            statusText: STATUS_MAP[r.status] || r.status
          };
        });

        const nextRows = reset ? rows : this.data.registrations.concat(rows);
        const pages = page && typeof page.pages === 'number' ? page.pages : 1;
        const hasMore = pageNo < pages && rows.length > 0;

        this.setData({
          registrations: nextRows,
          hasMore,
          registrationsLoading: false,
          registrationsLoadingText: hasMore ? '加载中...' : '没有更多了'
        });
      })
      .catch(() => {
        this.setData({
          registrationsLoading: false,
          registrationsLoadingText: '加载失败'
        });
      });
  },

  onReachBottom() {
    if (this.data.registrationsLoading || !this.data.hasMore) return;
    const next = this.data.pageNo + 1;
    this.setData({ pageNo: next });
    this.loadRegistrations(next, false);
  },

  goToMine() {
    wx.navigateTo({ url: '/pages/mine/mine' });
  }
});