import 'package:flutter/material.dart';
import '../../../../app/theme/app_colors.dart';
import '../../../../app/theme/app_typography.dart';
import '../../../../app/theme/app_spacing.dart';
import '../../../../shared/widgets/status_tag.dart';
import '../../../../shared/widgets/empty_state.dart';

/// A5. 交易模块（二级市场）
///
/// 我的挂单、我的交易记录
class TradingPage extends StatefulWidget {
  const TradingPage({super.key});

  @override
  State<TradingPage> createState() => _TradingPageState();
}

class _TradingPageState extends State<TradingPage>
    with SingleTickerProviderStateMixin {
  late TabController _tabController;

  @override
  void initState() {
    super.initState();
    _tabController = TabController(length: 2, vsync: this);
  }

  @override
  void dispose() {
    _tabController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('我的交易'),
        bottom: TabBar(
          controller: _tabController,
          tabs: const [
            Tab(text: '我的挂单'),
            Tab(text: '交易记录'),
          ],
        ),
      ),
      body: TabBarView(
        controller: _tabController,
        children: [
          _buildMyListings(),
          _buildTransactionHistory(),
        ],
      ),
    );
  }

  Widget _buildMyListings() {
    return ListView.separated(
      padding: const EdgeInsets.fromLTRB(20, 16, 20, 100),
      itemCount: 3,
      separatorBuilder: (_, __) => const SizedBox(height: 12),
      itemBuilder: (context, index) {
        final statuses = [
          StatusTags.onSale(),
          StatusTags.completed(),
          StatusTags.cancelled(),
        ];
        return Container(
          padding: AppSpacing.cardPadding,
          decoration: BoxDecoration(
            color: AppColors.surface,
            borderRadius: AppSpacing.borderRadiusMd,
            border: Border.all(color: AppColors.borderLight),
          ),
          child: Column(
            children: [
              Row(
                children: [
                  Container(
                    width: 48,
                    height: 48,
                    decoration: BoxDecoration(
                      color: AppColors.primarySurface,
                      borderRadius: AppSpacing.borderRadiusSm,
                    ),
                    child: Icon(Icons.confirmation_number_outlined,
                        color: AppColors.primary.withValues(alpha: 0.4), size: 22),
                  ),
                  const SizedBox(width: 12),
                  Expanded(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text(['星巴克 \$25', 'Amazon \$50', 'Nike \$80'][index],
                            style: AppTypography.labelMedium),
                        const SizedBox(height: 4),
                        Row(
                          children: [
                            Text('挂单价 ', style: AppTypography.caption),
                            Text('\$${[21.25, 42.50, 68.00][index]}',
                                style: AppTypography.priceSmall.copyWith(fontSize: 14)),
                          ],
                        ),
                      ],
                    ),
                  ),
                  statuses[index],
                ],
              ),
              const SizedBox(height: 12),
              Container(
                padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
                decoration: BoxDecoration(
                  color: AppColors.gray50,
                  borderRadius: AppSpacing.borderRadiusSm,
                ),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    Text('挂单时间: 2026/02/${9 - index}',
                        style: AppTypography.caption),
                    if (index == 0)
                      GestureDetector(
                        onTap: () {},
                        child: Text('撤单', style: AppTypography.labelSmall.copyWith(
                          color: AppColors.error,
                        )),
                      ),
                  ],
                ),
              ),
            ],
          ),
        );
      },
    );
  }

  Widget _buildTransactionHistory() {
    return ListView.separated(
      padding: const EdgeInsets.fromLTRB(20, 16, 20, 100),
      itemCount: 6,
      separatorBuilder: (_, __) => const SizedBox(height: 8),
      itemBuilder: (context, index) {
        final isBuy = index % 2 == 0;
        return Container(
          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
          decoration: BoxDecoration(
            color: AppColors.surface,
            borderRadius: AppSpacing.borderRadiusSm,
            border: Border.all(color: AppColors.borderLight),
          ),
          child: Row(
            children: [
              Container(
                width: 36,
                height: 36,
                decoration: BoxDecoration(
                  color: isBuy ? AppColors.successLight : AppColors.errorLight,
                  shape: BoxShape.circle,
                ),
                child: Icon(
                  isBuy ? Icons.arrow_downward_rounded : Icons.arrow_upward_rounded,
                  size: 18,
                  color: isBuy ? AppColors.success : AppColors.error,
                ),
              ),
              const SizedBox(width: 12),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    Text(
                      isBuy ? '买入' : '卖出',
                      style: AppTypography.labelMedium,
                    ),
                    Text(
                      '品牌 ${index + 1} 礼品卡',
                      style: AppTypography.caption,
                    ),
                  ],
                ),
              ),
              Column(
                crossAxisAlignment: CrossAxisAlignment.end,
                children: [
                  Text(
                    '${isBuy ? "-" : "+"}\$${(index + 1) * 15}.00',
                    style: AppTypography.labelMedium.copyWith(
                      color: isBuy ? AppColors.textPrimary : AppColors.success,
                    ),
                  ),
                  Text('02/${10 - index} 14:${30 + index}',
                      style: AppTypography.caption),
                ],
              ),
            ],
          ),
        );
      },
    );
  }
}