import 'package:flutter/material.dart';
import '../core/theme/app_theme.dart';

/// 移动端列表卡片的单个字段（label: value）。
class MobileCardField {
  final String label;
  final String? value;

  /// 自定义值控件（如带颜色的金额、状态徽章）；提供后忽略 [value]。
  final Widget? valueWidget;
  const MobileCardField(this.label, this.value, {this.valueWidget});
}

/// 窄屏（手机）列表的通用卡片：标题 + 右上角徽章 + 字段竖排 + 底部操作。
/// 替代宽屏的表格行，使一行数据在手机上可一屏读完、操作可点。
class MobileListCard extends StatelessWidget {
  final Widget title;
  final Widget? subtitle;
  final Widget? trailing;
  final List<MobileCardField> fields;
  final List<Widget>? actions;
  final VoidCallback? onTap;

  const MobileListCard({
    super.key,
    required this.title,
    this.subtitle,
    this.trailing,
    this.fields = const [],
    this.actions,
    this.onTap,
  });

  @override
  Widget build(BuildContext context) {
    return Card(
      margin: EdgeInsets.zero,
      elevation: 0,
      shape: RoundedRectangleBorder(
        borderRadius: BorderRadius.circular(8),
        side: BorderSide(color: Colors.grey.shade200),
      ),
      child: InkWell(
        borderRadius: BorderRadius.circular(8),
        onTap: onTap,
        child: Padding(
          padding: const EdgeInsets.all(12),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Row(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Expanded(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        DefaultTextStyle(
                          style: const TextStyle(
                            fontSize: 15,
                            fontWeight: FontWeight.w600,
                            color: AppTheme.textPrimary,
                          ),
                          child: title,
                        ),
                        if (subtitle != null) ...[
                          const SizedBox(height: 2),
                          DefaultTextStyle(
                            style: const TextStyle(
                                fontSize: 12,
                                color: AppTheme.textSecondary),
                            child: subtitle!,
                          ),
                        ],
                      ],
                    ),
                  ),
                  if (trailing != null) ...[
                    const SizedBox(width: 8),
                    trailing!,
                  ],
                ],
              ),
              if (fields.isNotEmpty) ...[
                const SizedBox(height: 10),
                ...fields.map(_buildField),
              ],
              if (actions != null && actions!.isNotEmpty) ...[
                const Divider(height: 18),
                Align(
                  alignment: Alignment.centerRight,
                  child: Wrap(
                    spacing: 4,
                    children: actions!,
                  ),
                ),
              ],
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildField(MobileCardField f) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 3),
      child: Row(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          SizedBox(
            width: 64,
            child: Text(
              f.label,
              style: const TextStyle(
                  fontSize: 13, color: AppTheme.textSecondary),
            ),
          ),
          Expanded(
            child: f.valueWidget ??
                Text(
                  f.value ?? '—',
                  style: const TextStyle(
                      fontSize: 13, color: AppTheme.textPrimary),
                ),
          ),
        ],
      ),
    );
  }
}