// 烹饪笔记控制器
// 创建时间: 2026-04-09
// 更新时间: 2026-04-12
// 名称: cooking_note_controller.dart
// 作用: 管理烹饪笔记的增删改查，支持Hive和SharedPreferences双重存储
// 上次更新内容: 添加SharedPreferences备选存储，确保笔记正确保存

import 'package:flutter/foundation.dart';
import 'package:get/get.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'dart:convert';
import '../../models/data/record/cooking_note_model.dart';
import '../../services/data/storage/hive_service.dart';

class CookingNoteController extends GetxController {
  static CookingNoteController get to => Get.find();

  final HiveService _hiveService = HiveService();
  final RxList<CookingNoteModel> _notes = <CookingNoteModel>[].obs;
  static const String _sharedPrefsKey = 'cooking_notes';

  SharedPreferences? _prefs;

  List<CookingNoteModel> get notes => _notes;

  @override
  void onInit() {
    super.onInit();
    _initPrefs();
  }

  Future<void> _initPrefs() async {
    try {
      _prefs = await SharedPreferences.getInstance();
      await loadNotes();
    } catch (e) {
      debugPrint('初始化SharedPreferences失败: $e');
    }
  }

  /// 加载所有烹饪笔记（优先Hive，失败则从SharedPreferences加载）
  Future<void> loadNotes() async {
    try {
      // 先尝试从Hive加载
      if (_hiveService.isInitialized) {
        final notes = _hiveService.getCookingNotes();
        if (notes.isNotEmpty) {
          _notes.assignAll(notes);
          debugPrint('从Hive加载笔记: ${notes.length}条');
          return;
        }
      }

      _prefs ??= await SharedPreferences.getInstance();
      final String? data = _prefs!.getString(_sharedPrefsKey);
      if (data != null && data.isNotEmpty) {
        final List<dynamic> jsonList = json.decode(data);
        _notes.assignAll(
          jsonList.map((json) => CookingNoteModel.fromJson(json)).toList(),
        );
        debugPrint('从SharedPreferences加载笔记: ${_notes.length}条');
      }
    } catch (e) {
      debugPrint('加载烹饪笔记失败: $e');
    }
  }

  /// 添加烹饪笔记
  Future<void> addNote(CookingNoteModel note) async {
    try {
      // 保存到Hive
      if (_hiveService.isInitialized) {
        await _hiveService.addCookingNote(note);
        debugPrint('笔记已保存到Hive: ${note.id}');
      }

      // 同时保存到SharedPreferences作为备份
      _notes.add(note);
      await _saveToSharedPreferences();
      debugPrint('笔记已保存到SharedPreferences: ${note.id}');
    } catch (e) {
      debugPrint('添加烹饪笔记失败: $e');
      // 即使失败也尝试保存到内存
      _notes.add(note);
    }
  }

  /// 更新烹饪笔记
  Future<void> updateNote(CookingNoteModel note) async {
    try {
      // 更新Hive
      if (_hiveService.isInitialized) {
        await _hiveService.updateCookingNote(note);
      }

      // 更新SharedPreferences
      final index = _notes.indexWhere((n) => n.id == note.id);
      if (index >= 0) {
        _notes[index] = note;
        await _saveToSharedPreferences();
      }
    } catch (e) {
      debugPrint('更新烹饪笔记失败: $e');
    }
  }

  /// 删除烹饪笔记
  Future<void> deleteNote(String id) async {
    try {
      // 从Hive删除
      if (_hiveService.isInitialized) {
        await _hiveService.deleteCookingNote(id);
      }

      // 从SharedPreferences删除
      _notes.removeWhere((n) => n.id == id);
      await _saveToSharedPreferences();
    } catch (e) {
      debugPrint('删除烹饪笔记失败: $e');
    }
  }

  /// 获取菜谱相关的笔记
  List<CookingNoteModel> getNotesByRecipeId(String recipeId) {
    return _notes.where((note) => note.recipeId == recipeId).toList();
  }

  /// 清空所有笔记
  Future<void> clearAllNotes() async {
    try {
      // 清空Hive
      if (_hiveService.isInitialized) {
        await _hiveService.clearCookingNotes();
      }

      // 清空SharedPreferences
      _notes.clear();
      await _saveToSharedPreferences();
    } catch (e) {
      debugPrint('清空烹饪笔记失败: $e');
    }
  }

  /// 保存到SharedPreferences
  Future<void> _saveToSharedPreferences() async {
    try {
      _prefs ??= await SharedPreferences.getInstance();
      final data = json.encode(_notes.map((n) => n.toJson()).toList());
      await _prefs!.setString(_sharedPrefsKey, data);
      debugPrint('笔记已保存到SharedPreferences: ${_notes.length}条');
    } catch (e) {
      debugPrint('保存笔记到SharedPreferences失败: $e');
    }
  }

  /// 获取所有标签
  List<String> getAllTags() {
    final tags = <String>{};
    for (final note in _notes) {
      tags.addAll(note.tags);
    }
    return tags.toList()..sort();
  }

  /// 根据标签筛选笔记
  List<CookingNoteModel> getNotesByTag(String tag) {
    return _notes.where((note) => note.tags.contains(tag)).toList();
  }

  String exportToJson() {
    final data = _notes.map((e) => e.toJson()).toList();
    return const JsonEncoder.withIndent('  ').convert(data);
  }

  String exportToCsv() {
    final buffer = StringBuffer();
    buffer.writeln('ID,菜谱ID,标题,内容,标签,创建时间');
    for (final note in _notes) {
      buffer.writeln(
        [
          note.id,
          note.recipeId,
          '"${(note.title ?? '').replaceAll('"', '""')}"',
          '"${note.content.replaceAll('"', '""').replaceAll('\n', ' ')}"',
          '"${note.tags.join('; ')}"',
          note.createdAt,
        ].join(','),
      );
    }
    return buffer.toString();
  }

  String exportToMarkdown() {
    final buffer = StringBuffer();
    buffer.writeln('# 📝 烹饪笔记');
    buffer.writeln();
    for (final note in _notes) {
      buffer.writeln('## ${note.displayTitle}');
      if (note.hasTags) {
        buffer.writeln('标签: ${note.tags.map((t) => '`$t`').join(' ')}');
      }
      buffer.writeln();
      buffer.writeln(note.content);
      buffer.writeln();
      buffer.writeln('*${note.displayDate}*');
      buffer.writeln('---');
      buffer.writeln();
    }
    return buffer.toString();
  }

  void importFromJson(Map<String, dynamic> json) {
    try {
      final note = CookingNoteModel.fromJson(json);
      if (!_notes.any((n) => n.id == note.id)) {
        addNote(note);
      }
    } catch (e) {
      debugPrint('CookingNoteController: importFromJson failed: $e');
    }
  }
}