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

/// 笔记详情页
class NoteDetailPage extends StatefulWidget {
  final Note note;

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

  @override
  State<NoteDetailPage> createState() => _NoteDetailPageState();
}

class _NoteDetailPageState extends State<NoteDetailPage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.note.title),
        actions: [
          IconButton(
            icon: const Icon(Icons.edit),
            onPressed: () => _navigateToEdit(context),
          ),
          IconButton(
            icon: const Icon(Icons.delete_outline),
            onPressed: () => _showDeleteDialog(context),
          ),
        ],
      ),
      body: SingleChildScrollView(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            // 标签区域
            if (widget.note.tags.isNotEmpty) _buildTagsSection(context),

            // 内容区域
            _buildContentSection(context),

            // 时间信息
            _buildTimeSection(context),
          ],
        ),
      ),
    );
  }

  /// 构建标签区域
  Widget _buildTagsSection(BuildContext context) {
    return Container(
      padding: const EdgeInsets.all(16),
      child: Wrap(
        spacing: 8,
        runSpacing: 8,
        children: widget.note.tags.map((tag) {
          return Chip(
            label: Text(tag),
            backgroundColor: Theme.of(context).colorScheme.primaryContainer,
            labelStyle: TextStyle(
              color: Theme.of(context).colorScheme.onPrimaryContainer,
            ),
          );
        }).toList(),
      ),
    );
  }

  /// 构建内容区域
  Widget _buildContentSection(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(16),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(
            widget.note.content,
            style: Theme.of(context).textTheme.bodyLarge?.copyWith(
                  height: 1.8,
                ),
          ),
        ],
      ),
    );
  }

  /// 构建时间信息区域
  Widget _buildTimeSection(BuildContext context) {
    return Container(
      margin: const EdgeInsets.all(16),
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: Theme.of(context).colorScheme.surfaceContainerHighest,
        borderRadius: BorderRadius.circular(12),
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Icon(
                Icons.access_time,
                size: 18,
                color: Theme.of(context).colorScheme.onSurfaceVariant,
              ),
              const SizedBox(width: 8),
              Text(
                '创建时间',
                style: Theme.of(context).textTheme.titleSmall?.copyWith(
                      fontWeight: FontWeight.bold,
                    ),
              ),
            ],
          ),
          const SizedBox(height: 8),
          Text(
            _formatDateTime(widget.note.createdAt),
            style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                  color: Theme.of(context).colorScheme.onSurfaceVariant,
                ),
          ),
          const SizedBox(height: 16),
          Row(
            children: [
              Icon(
                Icons.edit,
                size: 18,
                color: Theme.of(context).colorScheme.onSurfaceVariant,
              ),
              const SizedBox(width: 8),
              Text(
                '更新时间',
                style: Theme.of(context).textTheme.titleSmall?.copyWith(
                      fontWeight: FontWeight.bold,
                    ),
              ),
            ],
          ),
          const SizedBox(height: 8),
          Text(
            _formatDateTime(widget.note.updatedAt),
            style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                  color: Theme.of(context).colorScheme.onSurfaceVariant,
                ),
          ),
        ],
      ),
    );
  }

  /// 格式化日期时间
  String _formatDateTime(DateTime dateTime) {
    return '${dateTime.year}-${dateTime.month.toString().padLeft(2, '0')}-${dateTime.day.toString().padLeft(2, '0')} ${dateTime.hour.toString().padLeft(2, '0')}:${dateTime.minute.toString().padLeft(2, '0')}';
  }

  /// 跳转到编辑页面
  void _navigateToEdit(BuildContext context) {
    Navigator.pushNamed(context, '/note-form', arguments: widget.note).then((_) {
      context.read<AppProvider>().loadNotes();
    });
  }

  /// 显示删除对话框
  void _showDeleteDialog(BuildContext context) {
    showDialog(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('确认删除'),
        content: Text('确定要删除"${widget.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(widget.note.id);
              if (!mounted) return;
              Navigator.pop(context);
              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),
            ),
          ),
        ],
      ),
    );
  }
}