import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../providers/app_provider.dart';
import '../models/data_models.dart';

/// 笔记列表项组件
class NoteListItem extends StatelessWidget {
  final Note note;

  const NoteListItem({super.key, required this.note});

  @override
  Widget build(BuildContext context) {
    return Card(
      margin: const EdgeInsets.only(bottom: 12),
      child: InkWell(
        onTap: () {
          // 跳转到详情页
          Navigator.pushNamed(context, '/note-detail', arguments: note);
        },
        borderRadius: BorderRadius.circular(12),
        child: Padding(
          padding: const EdgeInsets.all(16),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              // 标题
              Text(
                note.title,
                style: Theme.of(context).textTheme.titleMedium?.copyWith(
                  fontWeight: FontWeight.bold,
                ),
              ),
              
              const SizedBox(height: 8),
              
              // 内容摘要
              Text(
                note.content,
                style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                  color: Theme.of(context).colorScheme.onSurfaceVariant,
                ),
                maxLines: 3,
                overflow: TextOverflow.ellipsis,
              ),
              
              const SizedBox(height: 12),
              
              // 标签
              if (note.tags.isNotEmpty) ...[
                Wrap(
                  spacing: 6,
                  runSpacing: 6,
                  children: note.tags.map((tag) => _buildTag(context, tag)).toList(),
                ),
              ],
              
              const SizedBox(height: 12),
              
              // 时间信息和操作按钮
              Row(
                mainAxisAlignment: MainAxisAlignment.spaceBetween,
                children: [
                  Text(
                    _formatDate(note.updatedAt),
                    style: Theme.of(context).textTheme.bodySmall?.copyWith(
                      color: Theme.of(context).colorScheme.onSurfaceVariant,
                    ),
                  ),
                  Row(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      IconButton(
                        icon: const Icon(Icons.edit, size: 20),
                        onPressed: () {
                          Navigator.pushNamed(context, '/note-form', arguments: note);
                        },
                        padding: EdgeInsets.zero,
                        constraints: const BoxConstraints(),
                      ),
                      IconButton(
                        icon: const Icon(Icons.delete_outline, size: 20),
                        color: Colors.red,
                        onPressed: () => _showDeleteDialog(context, note),
                        padding: EdgeInsets.zero,
                        constraints: const BoxConstraints(),
                      ),
                    ],
                  ),
                ],
              ),
            ],
          ),
        ),
      ),
    );
  }

  /// 构建标签
  Widget _buildTag(BuildContext context, String tag) {
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
      decoration: BoxDecoration(
        color: Theme.of(context).colorScheme.primaryContainer,
        borderRadius: BorderRadius.circular(12),
      ),
      child: Text(
        '#$tag',
        style: TextStyle(
          fontSize: 12,
          color: Theme.of(context).colorScheme.onPrimaryContainer,
        ),
      ),
    );
  }

  /// 格式化日期
  String _formatDate(DateTime date) {
    final now = DateTime.now();
    final difference = now.difference(date);
    
    if (difference.inDays == 0) {
      if (difference.inHours == 0) {
        if (difference.inMinutes == 0) {
          return '刚刚';
        }
        return '${difference.inMinutes}分钟前';
      }
      return '${difference.inHours}小时前';
    } else if (difference.inDays < 7) {
      return '${difference.inDays}天前';
    } else {
      return '${date.year}-${date.month.toString().padLeft(2, '0')}-${date.day.toString().padLeft(2, '0')}';
    }
  }

  /// 显示删除对话框
  void _showDeleteDialog(BuildContext context, Note note) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('确认删除'),
        content: Text('确定要删除"${note.title}"吗？此操作不可恢复。'),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('取消'),
          ),
          TextButton(
            onPressed: () async {
              await context.read<AppProvider>().removeNote(note.id);
              if (!context.mounted) return;
              Navigator.pop(context);
              ScaffoldMessenger.of(context).showSnackBar(
                const SnackBar(
                  content: Text('已删除'),
                  behavior: SnackBarBehavior.floating,
                ),
              );
            },
            child: const Text(
              '删除',
              style: TextStyle(color: Colors.red),
            ),
          ),
        ],
      ),
    );
  }
}