flutter/lib/pages/order/seller.dart

/// 商家的订单
library;

import 'package:flutter/material.dart';
import 'package:get/get.dart';
import 'package:loopin/api/shop_api.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
  int pageNum = 1;
  final int pageSize = 10;
  bool isLoadingMore = false;
  bool isRefreshing = false;
  List<Map<String, dynamic>> pageOrderList = [];

  List tabList = [
    {'id': 0, 'name': "全部"}, // 0表示全部
    {'id': 4, 'name': "已退款", 'badge': 1}, // 4对应已退款
    {'id': 2, 'name': "待核销", 'badge': 1}, // 2对待核销
    {'id': 3, 'name': "已完成"}, // 3对已完成
    {'id': 5, 'name': "取消"} // 5对取消
  ];

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

  @override
  void initState() {
    super.initState();
    // 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();
  }

  // 滚动监听
  void _scrollListener() {
    if (scrollController.position.pixels == scrollController.position.maxScrollExtent && !isLoadingMore) {
      getOrderList(true);
    }
  }

  // Tab切换监听
  void _tabChanged() {
    if (tabController.indexIsChanging) {
      // 切换tab时重新加载数据
      getOrderList(false);
    }
  }

  // 获取订单列表
  void getOrderList(bool loadMore) async {
    if (isLoadingMore || isRefreshing) return;

    setState(() {
      if (!loadMore) {
        pageNum = 1; // 重置为第一页
        isRefreshing = true;
        pageOrderList = [];
      } else {
        isLoadingMore = true;
      }
    });

    try {
      final currentTab = tabList[tabController.index];
      final status = currentTab['id'];

      final res = await Http.post(ShopApi.myOrderList, data: {
        'current': pageNum, // 当前页码
        'size': pageSize,
      //  'orderStatus': status == 0 ? '' : status.toString(), // 0表示全部，传空字符串
      });

      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;
        final int currentPage = data['current'] ?? 1;
        final int pages = data['pages'] ?? 1;

        setState(() {
          if (loadMore) {
            pageOrderList.addAll(newOrders);
          } else {
            pageOrderList = newOrders;
          }

          // 分页逻辑
          if (newOrders.isNotEmpty && currentPage < pages) {
            pageNum = currentPage + 1; // 下一页
            isLoadingMore = true;
          } else {
            isLoadingMore = false; // 没有更多数据
          }
        });
      }
    } catch (e) {
      print('获取订单列表失败: $e');
      setState(() {
        isLoadingMore = false;
      });
    } finally {
      setState(() {
        isRefreshing = false;
      });
    }
  }

  // 刷新数据时重置分页状态
  void _refreshData() {
    setState(() {
      pageNum = 1;
      isLoadingMore = false;
    });
    getOrderList(false);
  }

  // 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['shopName'] ?? '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: item['image'] != null && item['image'].isNotEmpty
                            ? Image.network(
                                item['image'],
                                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(
                                  '¥${item['price'] ?? '0'}',
                                  style: TextStyle(color: Colors.red, fontSize: 16),
                                ),
                                Spacer(),
                                Text(
                                  'x${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: '实付款: '),
                      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['status']),
          ],
        ),
      ),
      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 1:
        return '待付款';
      case 2:
        return '待核销';
      case 3:
        return '已完成';
      case 4:
        return '已退款';
      case 5:
        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 1:
        return Colors.orange;
      case 2:
        return Colors.blue;
      case 3:
        return Colors.green;
      case 4:
        return Colors.red;
      case 5:
        return Colors.grey;
      default:
        return Colors.black;
    }
  }

  // 构建操作按钮
  Widget _buildActionButtons(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 1: // 待付款
        return Row(
          mainAxisAlignment: MainAxisAlignment.end,
          children: [
            ElevatedButton(
              onPressed: () => _cancelOrder(),
              style: ButtonStyle(backgroundColor: WidgetStateProperty.all(Colors.white)),
              child: Text('取消订单'),
            ),
            SizedBox(width: 10),
            ElevatedButton(
              onPressed: () => _payOrder(),
              style: ButtonStyle(
                backgroundColor: WidgetStateProperty.all(Color(0xff07c160)),
                foregroundColor: WidgetStateProperty.all(Colors.white),
              ),
              child: Text('去支付'),
            ),
          ],
        );
      case 2: // 待核销
        return Row(
          mainAxisAlignment: MainAxisAlignment.end,
          children: [
            ElevatedButton(
              onPressed: () => _contactCustomerService(),
              style: ButtonStyle(
                backgroundColor: WidgetStateProperty.all(Color(0xFFFCBE13)),
                foregroundColor: WidgetStateProperty.all(Colors.white),
              ),
              child: Text('联系客服'),
            ),
          ],
        );
      case 3: // 已完成
        return Row(
          mainAxisAlignment: MainAxisAlignment.end,
          children: [
            ElevatedButton(
              onPressed: () => _deleteOrder(),
              style: ButtonStyle(backgroundColor: WidgetStateProperty.all(Colors.white)),
              child: Text('删除订单'),
            ),
          ],
        );
      default:
        return SizedBox.shrink();
    }
  }

  // 订单操作的方法
  void _cancelOrder() {
    // 取消订单逻辑
  }

  void _payOrder() {
    // 支付订单逻辑
  }

  void _contactCustomerService() {
    // 联系客服逻辑
  }

  void _deleteOrder() {
    // 删除订单逻辑
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      key: scaffoldKey,
      backgroundColor: Colors.white,
      appBar: AppBar(
        titleSpacing: 1.0,
        title: Text(
          '商家订单',
          style: TextStyle(fontSize: 18),
        ),
        bottom: PreferredSize(
          preferredSize: Size.fromHeight(45.0),
          child: Row(children: [
            Expanded(
              child: TabBar(
                controller: tabController,
                tabs: tabList
                    .map((item) => Container(
                          alignment: Alignment.center,
                          height: 45.0,
                          child: Badge.count(
                            backgroundColor: Colors.red,
                            offset: Offset(14, -4),
                            count: item['badge'] ?? 0,
                            isLabelVisible: item['badge'] != null ? true : false,
                            child: Text(
                              item['name'],
                              style: TextStyle(fontSize: 16),
                              overflow: TextOverflow.ellipsis,
                              softWrap: false,
                            ),
                          ),
                        ))
                    .toList(),
                isScrollable: false,
                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.tab,
                unselectedLabelStyle: TextStyle(fontSize: 16.0, fontFamily: 'Microsoft YaHei'),
                labelStyle: TextStyle(fontSize: 18.0, fontFamily: 'Microsoft YaHei', fontWeight: FontWeight.w700),
                dividerHeight: 0,
                padding: EdgeInsets.symmetric(horizontal: 10.0),
                labelPadding: EdgeInsets.symmetric(horizontal: 10.0),
                indicatorPadding: EdgeInsets.symmetric(horizontal: 15.0, vertical: 5.0),
              ),
            ),
          ]),
        ),
      ),
      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: pageOrderList.isEmpty && !isRefreshing
                    ? emptyTip()
                    : ListView.builder(
                        controller: scrollController,
                        physics: AlwaysScrollableScrollPhysics(),
                        padding: EdgeInsets.all(10.0),
                        itemCount: pageOrderList.length + (isLoadingMore ? 1 : 0),
                        itemBuilder: (context, index) {
                          if (index == pageOrderList.length) {
                            return _buildLoadMoreIndicator();
                          }
                          return _buildOrderItem(pageOrderList[index]);
                        },
                      ),
              ),
            ),
          );
        }),
      ),
    );
  }

  // 加载更多指示器
  Widget _buildLoadMoreIndicator() {
    return Padding(
      padding: EdgeInsets.symmetric(vertical: 15.0),
      child: Center(
        child: isLoadingMore
            ? 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, // 覆盖整个页面宽度
      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),
          )
        ],
      ),
    );
  }
}