// pages/order/index.js
const API = require('../../utils/api.js');

Page({
  // 分享给朋友/群聊
  onShareAppMessage() {
    return {
      title: '鸡蛋贸易平台 - 我的订单',
      path: '/pages/order/index',
      imageUrl: '/images/你有好蛋.png'
    }
  },

  // 分享到朋友圈
  onShareTimeline() {
    return {
      title: '鸡蛋贸易平台 - 我的订单',
      query: '',
      imageUrl: '/images/你有好蛋.png'
    }
  },

  data: {
    userInfo: {},
    orders: [],
    loading: false,
    error: '',
    // 订单状态标签
    activeTab: 'all',
    // 时间筛选相关
    dateRange: {
      start: '',
      end: ''
    },
    // 分页相关
    page: 1,
    pageSize: 10,
    hasMore: true,
    loadingMore: false,
    // 统计信息
    statistics: {
      totalOrders: 0,
      totalAmount: 0,
      totalPieces: 0,
      totalWeight: 0,
      unpaidAmount: 0,
      paidAmount: 0
    }
  },

  onLoad() {
    // 页面加载时的初始化逻辑
    this.loadUserInfo(() => {
      this.loadOrders();
    });
  },

  onShow() {
    // 页面显示时的逻辑
    this.loadUserInfo(() => {
      // 更新自定义tabBar状态
      if (typeof this.getTabBar === 'function' && this.getTabBar()) {
        this.getTabBar().setData({
          selected: 4 // 保持与个人中心相同的选中状态
        });
      }
    });
  },

  // 加载用户信息
  loadUserInfo(callback) {
    const app = getApp();
    let userInfo = {};
    
    if (app.globalData.userInfo) {
      userInfo = app.globalData.userInfo;
    } else {
      userInfo = wx.getStorageSync('userInfo') || {};
    }
    
    // 同步更新用户信息，确保loadOrders能获取到最新数据
    this.data.userInfo = userInfo;
    
    // 同时异步更新UI
    this.setData({ userInfo: userInfo }, () => {
      if (callback) callback();
    });
  },

  // 加载订单数据
  loadOrders(isLoadMore = false, activeTab = this.data.activeTab) {
    const userInfo = this.data.userInfo;
    const phoneNumber = userInfo.phoneNumber;
    
    if (!phoneNumber) {
      this.setData({
        error: '请先登录并绑定电话号码',
        orders: []
      });
      return;
    }

    if (isLoadMore) {
      this.setData({ loadingMore: true });
    } else {
      this.setData({ loading: true, error: '' });
    }

    const page = isLoadMore ? this.data.page + 1 : 1;
    const pageSize = this.data.pageSize;
    
    // 根据标签确定付款状态
    let paymentStatus = '';
    if (activeTab === 'unpaid') {
      paymentStatus = '未收款';
    } else if (activeTab === 'completed') {
      paymentStatus = '全款';
    }
    
    console.log('loadOrders - activeTab:', activeTab, 'paymentStatus:', paymentStatus, 'page:', page);

    // 并行请求订单列表和统计数据
    const orderRequest = API.request('/api/orders/list', 'POST', {
      phoneNumber: phoneNumber,
      startDate: this.data.dateRange.start,
      endDate: this.data.dateRange.end,
      paymentStatus: paymentStatus,
      page: page,
      pageSize: pageSize
    }).then(res => {
      return { data: res };
    }).catch(err => {
      throw err;
    });

    // 只有在非加载更多时才请求统计数据（加载更多时统计数据不变）
    const statisticsRequest = isLoadMore ? Promise.resolve(null) : API.request('/api/orders/statistics', 'POST', {
      phoneNumber: phoneNumber,
      startDate: this.data.dateRange.start,
      endDate: this.data.dateRange.end,
      paymentStatus: paymentStatus
    }).then(res => {
      return { data: res };
    }).catch(err => {
      throw err;
    });

    // 处理所有请求
    Promise.all([orderRequest, statisticsRequest])
      .then(([orderRes, statisticsRes]) => {
        console.log('获取订单列表成功:', orderRes.data);
        if (orderRes.data.success) {
          const newOrders = orderRes.data.data.orders || [];
          const totalOrders = isLoadMore ? [...this.data.orders, ...newOrders] : newOrders;
          const hasMore = newOrders.length === pageSize;
          
          // 处理统计数据
          let statistics = this.data.statistics;
          if (statisticsRes && statisticsRes.data && statisticsRes.data.success) {
            statistics = statisticsRes.data.data;
            console.log('获取统计数据成功:', statistics);
          }
          
          this.setData({
            orders: totalOrders,
            page: page,
            hasMore: hasMore,
            loading: false,
            loadingMore: false,
            statistics: statistics
          });
        } else {
          this.setData({
            error: orderRes.data.message || '获取订单失败',
            loading: false,
            loadingMore: false
          });
        }
      })
      .catch((err) => {
        console.error('请求失败:', err);
        this.setData({
          error: err.message || '网络请求失败，请稍后重试',
          loading: false,
          loadingMore: false
        });
      });
  },

  // 返回上一页
  goBack() {
    wx.navigateBack();
  },

  // 查看订单详情
  viewOrderDetail(e) {
    const orderId = e.currentTarget.dataset.orderId;
    wx.navigateTo({
      url: `/pages/order/detail/index?orderId=${orderId}`
    });
  },

  // 去首页购物
  goToHome() {
    wx.switchTab({
      url: '/pages/index/index'
    });
  },

  // 选择开始日期
  bindStartDateChange(e) {
    const startDate = e.detail.value;
    this.setData({
      'dateRange.start': startDate
    });
  },

  // 选择结束日期
  bindEndDateChange(e) {
    const endDate = e.detail.value;
    this.setData({
      'dateRange.end': endDate
    });
  },

  // 重置日期筛选
  resetDateFilter() {
    this.setData({
      'dateRange.start': '',
      'dateRange.end': ''
    });
    this.loadOrders();
  },

  // 应用日期筛选
  applyDateFilter() {
    this.loadOrders();
  },

  // 切换订单状态标签
  switchTab(e) {
    const tab = e.currentTarget.dataset.tab;
    console.log('switchTab - tab:', tab);
    this.setData({
      activeTab: tab,
      page: 1,
      orders: []
    }, () => {
      console.log('switchTab - after setData, activeTab:', this.data.activeTab);
      this.loadOrders(false, tab);
    });
  },

  // 计算统计信息
  calculateStatistics() {
    const orders = this.data.orders;
    if (!orders || orders.length === 0) {
      this.setData({
        statistics: {
          totalOrders: 0,
          totalAmount: 0,
          totalPieces: 0,
          unpaidAmount: 0,
          paidAmount: 0
        }
      });
      return;
    }

    let totalOrders = orders.length;
    let totalAmount = 0;
    let totalPieces = 0;
    let unpaidAmount = 0;
    let paidAmount = 0;

    orders.forEach(order => {
      // 累加总金额和总件数
      if (order.total_amount) {
        totalAmount += parseFloat(order.total_amount) || 0;
      }
      if (order.total_pieces) {
        totalPieces += parseInt(order.total_pieces) || 0;
      }

      // 区分未付款和已付款
      if (order.payment_status === '未收款') {
        if (order.total_amount) {
          unpaidAmount += parseFloat(order.total_amount) || 0;
        }
      } else if (order.payment_status === '全款') {
        if (order.total_amount) {
          paidAmount += parseFloat(order.total_amount) || 0;
        }
      }
    });

    this.setData({
      statistics: {
        totalOrders,
        totalAmount: Math.round(totalAmount * 100) / 100,
        totalPieces,
        unpaidAmount: Math.round(unpaidAmount * 100) / 100,
        paidAmount: Math.round(paidAmount * 100) / 100
      }
    });
  },

  // 滚动到底部的预加载逻辑
  onReachBottom() {
    if (!this.data.loadingMore && this.data.hasMore) {
      this.loadOrders(true, this.data.activeTab);
    }
  }
})