/// 商家的订单
library;

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:loopin/utils/wxsdk.dart';
import 'package:loopin/api/shop_api.dart';
import 'package:loopin/components/my_toast.dart';
import 'package:loopin/service/http.dart';

import '../../behavior/custom_scroll_behavior.dart';

class Seller extends StatefulWidget {
  const Seller({super.key});

  @override
  State<Seller> createState() => _SellerState();
}

class _SellerState extends State<Seller> with SingleTickerProviderStateMixin {
  GlobalKey<ScaffoldState> scaffoldKey = GlobalKey();
  // 分页内容 - 为每个Tab单独存储数据
  final int pageSize = 10;
  bool isLoadingMore = false;
  bool isRefreshing = false;

  // 为每个Tab单独存储状态
  List<Map<String, dynamic>> _allOrders = [];
  List<Map<String, dynamic>> _pendingPaymentOrders = [];
  List<Map<String, dynamic>> _pendingVerificationOrders = [];
  List<Map<String, dynamic>> _completedOrders = [];
  List<Map<String, dynamic>> _closedOrders = [];
  List<Map<String, dynamic>> _refundingOrders = [];
  List<Map<String, dynamic>> _refundedOrders = [];
  List<Map<String, dynamic>> _cancelledOrders = [];

  // 每个Tab的分页状态
  Map<int, int> _pageNums = {};
  Map<int, int> _totalCounts = {};
  Map<int, bool> _hasMoreData = {};
  Map<int, bool> _isLoading = {};

  // 订单状态：0->待付款；1->待核销；2->已完成；3->已关闭；4->退款中；5->已退款 6->已取消  精确匹配
  List tabList = [
    {'id': '', 'name': "全部", 'index': 0},
    {'id': 0, 'name': "待付款", 'index': 1},
    {'id': 1, 'name': "待核销", 'index': 2},
    {'id': 2, 'name': "已完成", 'index': 3},
    {'id': 3, 'name': "已关闭", 'index': 4},
    {'id': 4, 'name': "退款中", 'index': 5},
    {'id': 5, 'name': "已退款", 'index': 6},
    {'id': 6, 'name': "已取消", 'index': 7}
  ];

  late ScrollController scrollController = ScrollController();
  late TabController tabController = TabController(initialIndex: 0, length: tabList.length, vsync: this);

  @override
  void initState() {
    super.initState();
    // 初始化分页状态
    for (var tab in tabList) {
      _pageNums[tab['index']] = 1;
      _totalCounts[tab['index']] = 0;
      _hasMoreData[tab['index']] = true;
      _isLoading[tab['index']] = false;
    }

    // 监听滚动事件
    scrollController.addListener(_scrollListener);
    // 监听tab切换事件
    tabController.addListener(_tabChanged);
    // 获取初始订单列表
    getOrderList(false);
  }

  @override
  void dispose() {
    scrollController.removeListener(_scrollListener);
    scrollController.dispose();
    tabController.removeListener(_tabChanged);
    tabController.dispose();
    super.dispose();
  }

  // 获取当前Tab的订单列表
  List<Map<String, dynamic>> _getCurrentOrderList() {
    final currentIndex = tabController.index;
    switch (currentIndex) {
      case 0: return _allOrders;
      case 1: return _pendingPaymentOrders;
      case 2: return _pendingVerificationOrders;
      case 3: return _completedOrders;
      case 4: return _closedOrders;
      case 5: return _refundingOrders;
      case 6: return _refundedOrders;
      case 7: return _cancelledOrders;
      default: return _allOrders;
    }
  }

  // 设置当前Tab的订单列表
  void _setCurrentOrderList(List<Map<String, dynamic>> orders, bool loadMore) {
    final currentIndex = tabController.index;
    setState(() {
      switch (currentIndex) {
        case 0:
          if (loadMore) {
            _allOrders.addAll(orders);
          } else {
            _allOrders = orders;
          }
          break;
        case 1:
          if (loadMore) {
            _pendingPaymentOrders.addAll(orders);
          } else {
            _pendingPaymentOrders = orders;
          }
          break;
        case 2:
          if (loadMore) {
            _pendingVerificationOrders.addAll(orders);
          } else {
            _pendingVerificationOrders = orders;
          }
          break;
        case 3:
          if (loadMore) {
            _completedOrders.addAll(orders);
          } else {
            _completedOrders = orders;
          }
          break;
        case 4:
          if (loadMore) {
            _closedOrders.addAll(orders);
          } else {
            _closedOrders = orders;
          }
          break;
        case 5:
          if (loadMore) {
            _refundingOrders.addAll(orders);
          } else {
            _refundingOrders = orders;
          }
          break;
        case 6:
          if (loadMore) {
            _refundedOrders.addAll(orders);
          } else {
            _refundedOrders = orders;
          }
          break;
        case 7:
          if (loadMore) {
            _cancelledOrders.addAll(orders);
          } else {
            _cancelledOrders = orders;
          }
          break;
      }
    });
  }

  // 滚动监听
  void _scrollListener() {
    final currentIndex = tabController.index;
    if (scrollController.position.pixels == scrollController.position.maxScrollExtent &&
        !_isLoading[currentIndex]! &&
        _hasMoreData[currentIndex]!) {
      getOrderList(true);
    }
  }

  // Tab切换监听
  void _tabChanged() {
    if (tabController.index != tabController.previousIndex) {
      // 如果当前Tab没有数据，则加载数据
      final currentOrders = _getCurrentOrderList();
      if (currentOrders.isEmpty) {
        getOrderList(false);
      }
    }
  }

  // 获取订单列表
  void getOrderList(bool loadMore) async {
    final currentIndex = tabController.index;
    final currentTab = tabList[currentIndex];

    if (_isLoading[currentIndex]! || isRefreshing) return;

    setState(() {
      if (!loadMore) {
        _pageNums[currentIndex] = 1;
        isRefreshing = true;
      } else {
        _isLoading[currentIndex] = true;
      }
    });

    try {
      final status = currentTab['id'];

      final res = await Http.post(ShopApi.myOrderList, data: {
        'current': _pageNums[currentIndex], // 当前页码
        'size': pageSize,
        'status': status == '' ? '' : status.toString(),
      });

      if (res['code'] == 200 && res['data'] != null) {
        final data = res['data'];
        final List<Map<String, dynamic>> newOrders = List<Map<String, dynamic>>.from(data['records'] ?? []);
        final int total = data['total'] ?? 0;

        debugPrint(data.toString(), wrapWidth: 1024);

        // 更新当前Tab的数据
        _setCurrentOrderList(newOrders, loadMore);

        // 更新分页状态 - 使用total总数判断
        setState(() {
          // 更新总数
          _totalCounts[currentIndex] = total;

          // 判断是否还有更多数据
          final currentOrderCount = _getCurrentOrderList().length;
          _hasMoreData[currentIndex] = currentOrderCount < total;

          // 如果有更多数据，增加页码
          if (_hasMoreData[currentIndex]!) {
            _pageNums[currentIndex] = _pageNums[currentIndex]! + 1;
          }
        });
      }
    } catch (e) {
      print('获取订单列表失败: $e');
      setState(() {
        _hasMoreData[currentIndex] = false;
      });
    } finally {
      setState(() {
        isRefreshing = false;
        _isLoading[currentIndex] = false;
      });
    }
  }

  // 刷新数据时重置分页状态
  void _refreshData() {
    final currentIndex = tabController.index;
    setState(() {
      _pageNums[currentIndex] = 1;
      _totalCounts[currentIndex] = 0;
      _isLoading[currentIndex] = false;
      _hasMoreData[currentIndex] = true;
    });
    getOrderList(false);
  }

  // 获取付款文案
  String _getPaymentText(dynamic status) {
    int statusCode = status is String ? int.tryParse(status) ?? 0 : (status is int ? status : 0);

    switch (statusCode) {
      case 0: // 待付款
        return '待付款: ';
      case 1: // 待核销
        return '已付款: ';
      case 2: // 已完成
        return '实付款: ';
      case 3: // 已关闭
        return '订单金额: ';
      case 4: // 退款中
        return '实付款: ';
      case 5: // 已退款
        return '退款金额: ';
      case 6: // 已取消
        return '订单金额: ';
      default:
        return '金额: ';
    }
  }

  // 构建订单项Widget
  Widget _buildOrderItem(Map<String, dynamic> order) {
    return GestureDetector(
      child: Container(
        margin: EdgeInsets.only(bottom: 10.0),
        padding: EdgeInsets.all(10.0),
        decoration: BoxDecoration(
          color: Colors.white,
          borderRadius: BorderRadius.circular(15.0),
          boxShadow: [
            BoxShadow(
              color: Colors.black.withAlpha(10),
              offset: Offset(0.0, 1.0),
              blurRadius: 1.0,
              spreadRadius: 0.0,
            ),
          ],
        ),
        child: Column(
          children: [
            Row(
              children: [
                Wrap(
                  crossAxisAlignment: WrapCrossAlignment.center,
                  spacing: 5.0,
                  children: [
                    ClipOval(
                      child: Image.asset(
                        'assets/images/avatar/img11.jpg',
                        width: 25.0,
                      ),
                    ),
                    Text(order['items'][0]['tenantName'] ?? '商家名称'),
                    Icon(
                      Icons.arrow_forward_ios_rounded,
                      color: Colors.grey,
                      size: 12.0,
                    ),
                  ],
                ),
                Spacer(),
                Text(
                  _getStatusText(order['status']),
                  style: TextStyle(color: _getStatusColor(order['status'])),
                )
              ],
            ),
            SizedBox(height: 10),
            // 商品信息
            if (order['items'] != null && order['items'].isNotEmpty)
              ...order['items'].map<Widget>((item) => Row(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Container(
                        width: 80.0,
                        height: 80.0,
                        decoration: BoxDecoration(
                          color: Colors.grey[200],
                          borderRadius: BorderRadius.circular(4.0),
                        ),
                        child: order['items'][0]['pic'] != null && order['items'][0]['pic'].isNotEmpty
                            ? Image.network(
                               order['items'][0]['pic'],
                                width: 80.0,
                                height: 80.0,
                                fit: BoxFit.cover,
                              )
                            : Icon(
                                Icons.shopping_bag_outlined,
                                size: 40.0,
                                color: Colors.grey[400],
                              ),
                      ),
                      SizedBox(width: 10),
                      Expanded(
                        child: Column(
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: [
                            Text(
                              item['productName'] ?? '商品名称',
                              maxLines: 2,
                              overflow: TextOverflow.ellipsis,
                              style: TextStyle(fontSize: 14),
                            ),
                            SizedBox(height: 5),
                            Row(
                              children: [
                                Text(
                                  '¥${item['salePrice'] ?? '0'}',
                                  style: TextStyle(color: Colors.red, fontSize: 16),
                                ),
                                Spacer(),
                                Text(
                                  'x${item['quantity'] ?? '1'}',
                                  style: TextStyle(color: Colors.grey),
                                ),
                              ],
                            ),
                          ],
                        ),
                      )
                    ],
                  )).toList(),
            SizedBox(height: 10),
            // 金额信息
            Container(
              padding: EdgeInsets.all(5.0),
              decoration: BoxDecoration(
                color: Colors.grey[50],
                borderRadius: BorderRadius.circular(5.0),
              ),
              child: Row(
                children: [
                  Spacer(),
                  Text.rich(
                    TextSpan(children: [
                      TextSpan(text: _getPaymentText(order['status'])), // 根据状态获取文案
                      TextSpan(
                        text: '¥${order['totalAmount'] ?? '0'}',
                        style: TextStyle(color: Colors.red, fontSize: 16),
                      ),
                    ]),
                  ),
                ],
              ),
            ),
            SizedBox(height: 10),
            // 根据状态显示不同的按钮
            _buildActionButtons(order),
          ],
        ),
      ),
      onTap: () {
        Get.toNamed('/order/detail', arguments: {'orderId': order['id']});
      },
    );
  }

  // 获取状态文本
  String _getStatusText(dynamic status) {
    // 处理字符串或数字类型的状态
    int statusCode = status is String ? int.tryParse(status) ?? 0 : (status is int ? status : 0);

    switch (statusCode) {
      case 0:
        return '待付款';
      case 1:
        return '待核销';
      case 2:
        return '已完成';
      case 3:
        return '已关闭';
      case 4:
        return '退款中';
      case 5:
        return '已退款';
      case 6:
        return '已取消';
      default:
        return '未知状态';
    }
  }

  // 获取状态颜色
  Color _getStatusColor(dynamic status) {
    int statusCode = status is String ? int.tryParse(status) ?? 0 : (status is int ? status : 0);

    switch (statusCode) {
      case 0:
        return Colors.grey;
      case 1:
        return Colors.blue;
      case 2:
        return Colors.green;
      case 3:
        return Colors.red;
      case 4:
        return Colors.orange;
      case 5:
        return Colors.grey;
      case 6:
        return Colors.grey;
      default:
        return Colors.black;
    }
  }

  // 构建操作按钮
  Widget _buildActionButtons(dynamic orderObject) {
    // 处理字符串或数字类型的状态
    var status = orderObject['status'];
    var orderId = orderObject['id'];
    int statusCode = status is String ? int.tryParse(status) ?? 0 : (status is int ? status : 0);
    switch (statusCode) {
      case 0: // 待付款
        return Row(
          mainAxisAlignment: MainAxisAlignment.end,
          children: [
            ElevatedButton(
              onPressed: () => _cancelOrder(orderId),
              style: ButtonStyle(backgroundColor: WidgetStateProperty.all(Colors.white)),
              child: Text('取消订单'),
            ),
            SizedBox(width: 10),
            ElevatedButton(
              onPressed: () => _payOrder(orderId),
              style: ButtonStyle(
                backgroundColor: WidgetStateProperty.all(Color(0xff07c160)),
                foregroundColor: WidgetStateProperty.all(Colors.white),
              ),
              child: Text('去支付'),
            ),
          ],
        );
      case 1: // 待核销
        return Row(
          mainAxisAlignment: MainAxisAlignment.end,
        );
      case 2: // 已完成
        return Row(
          mainAxisAlignment: MainAxisAlignment.end,
        );
      default:
        return SizedBox.shrink();
    }
  }

  // 订单操作的方法
  void _cancelOrder(String orderId) async {
    try {
      final res = await Http.post('${ShopApi.cancelGoodsOrder}/$orderId');
      print('取消订单成功-------------->${res}');

      if (res['code'] == 200) {
        MyToast().tip(
          title: '订单已取消',
          position: 'center',
          type: 'success',
        );
        // 刷新所有相关的tab
        _refreshAllRelatedTabs();
      }
    } catch (e) {
      print('取消订单失败-------------->${e}');
    }
  }

  // 刷新所有相关的tab
  void _refreshAllRelatedTabs() {
    // 需要刷新的tab索引：全部(0)、待付款(1)、已取消(7)
    List<int> tabsToRefresh = [0, 1, 7];

    for (int tabIndex in tabsToRefresh) {
      _resetTabData(tabIndex);

      // 如果当前正在查看这个tab，立即刷新数据
      if (tabController.index == tabIndex) {
        getOrderList(false);
      }
    }
  }

  void _payOrder(_orderId) {
     // 打开微信小程序的某个页面地址，如pages/index/index
     Wxsdk.openMiniApp(orderId: _orderId);
  }

  // 重置指定tab的数据
  void _resetTabData(int index) {
    setState(() {
      _pageNums[index] = 1;
      _totalCounts[index] = 0;
      _isLoading[index] = false;
      _hasMoreData[index] = true;

      switch (index) {
        case 0: _allOrders = []; break;
        case 1: _pendingPaymentOrders = []; break;
        case 2: _pendingVerificationOrders = []; break;
        case 3: _completedOrders = []; break;
        case 4: _closedOrders = []; break;
        case 5: _refundingOrders = []; break;
        case 6: _refundedOrders = []; break;
        case 7: _cancelledOrders = []; break;
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      key: scaffoldKey,
      backgroundColor: Colors.white,
      appBar: AppBar(
        titleSpacing: 1.0,
        title: Text(
          '我的订单',
          style: TextStyle(fontSize: 18),
        ),
        bottom: PreferredSize(
          preferredSize: Size.fromHeight(45.0),
          child: Container(
             height: 45.0,
             alignment: Alignment.centerLeft,
              child: TabBar(
                controller: tabController,
                tabAlignment: TabAlignment.start,
                isScrollable: true,
                padding: EdgeInsets.only(left: 0),
                indicatorPadding: EdgeInsets.zero,
                labelPadding: EdgeInsets.symmetric(horizontal: 10.0),
                tabs: tabList
                    .map((item) => Container(
                          constraints: BoxConstraints(minWidth: 70),
                          alignment: Alignment.center,
                          child: Badge.count(
                            backgroundColor: Colors.red,
                            offset: Offset(14, -4),
                            count: item['badge'] ?? 0,
                            isLabelVisible: item['badge'] != null && item['badge'] > 0,
                            child: Text(
                              item['name'],
                              style: TextStyle(fontSize: 16),
                              overflow: TextOverflow.ellipsis,
                            ),
                          ),
                        ))
                    .toList(),
                    overlayColor: WidgetStateProperty.all(Colors.transparent),
                    unselectedLabelColor: Colors.black87,
                    labelColor: Color(0xFFFF5000),
                    indicator: UnderlineTabIndicator(
                      borderRadius: BorderRadius.circular(10.0),
                      borderSide: BorderSide(color: Color(0xFFFF5000), width: 2.0),
                    ),
                    indicatorSize: TabBarIndicatorSize.label,
                    unselectedLabelStyle: TextStyle(fontSize: 16.0, fontFamily: 'Microsoft YaHei'),
                    labelStyle: TextStyle(fontSize: 16.0, fontFamily: 'Microsoft YaHei', fontWeight: FontWeight.w700),
                    dividerHeight: 0,
                  ),
          ),
        ),
      ),
      body: TabBarView(
        controller: tabController,
        children: List.generate(tabList.length, (index) {
          return RefreshIndicator(
            onRefresh: () async {
              _refreshData();
            },
            child: ScrollConfiguration(
              behavior: CustomScrollBehavior().copyWith(scrollbars: false),
              child: Container(
                color: Colors.grey[50],
                child: Builder(
                  builder: (context) {
                    final currentOrders = _getOrderListByIndex(index);
                    final isLoading = _isLoading[index] ?? false;
                    final hasMoreData = _hasMoreData[index] ?? false;

                    return currentOrders.isEmpty && !isRefreshing
                        ? emptyTip()
                        : ListView.builder(
                            controller: scrollController,
                            physics: AlwaysScrollableScrollPhysics(),
                            padding: EdgeInsets.all(10.0),
                            itemCount: currentOrders.length + (hasMoreData ? 1 : 0),
                            itemBuilder: (context, itemIndex) {
                              if (itemIndex == currentOrders.length) {
                                return _buildLoadMoreIndicator(isLoading);
                              }
                              return _buildOrderItem(currentOrders[itemIndex]);
                            },
                          );
                  }
                ),
              ),
            ),
          );
        }),
      ),
    );
  }

  // 根据索引获取订单列表
  List<Map<String, dynamic>> _getOrderListByIndex(int index) {
    switch (index) {
      case 0: return _allOrders;
      case 1: return _pendingPaymentOrders;
      case 2: return _pendingVerificationOrders;
      case 3: return _completedOrders;
      case 4: return _closedOrders;
      case 5: return _refundingOrders;
      case 6: return _refundedOrders;
      case 7: return _cancelledOrders;
      default: return _allOrders;
    }
  }

  // 加载更多指示器
  Widget _buildLoadMoreIndicator(bool isLoading) {
    return Padding(
      padding: EdgeInsets.symmetric(vertical: 15.0),
      child: Center(
        child: isLoading
            ? Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  SizedBox(
                    width: 20,
                    height: 20,
                    child: CircularProgressIndicator(strokeWidth: 2),
                  ),
                  SizedBox(width: 10),
                  Text('加载中...', style: TextStyle(color: Colors.grey)),
                ],
              )
            : Text('没有更多数据了', style: TextStyle(color: Colors.grey)),
      ),
    );
  }

  Widget emptyTip() {
    return Container(
      width: double.infinity,
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          Image.asset(
            'assets/images/empty.png',
            width: 100.0,
          ),
          SizedBox(height: 10),
          Text(
            '还没有相关订单~',
            style: TextStyle(color: Colors.grey, fontSize: 12.0),
          )
        ],
      ),
    );
  }
}