import 'package:flutter/material.dart';
import 'package:sensors_plus/sensors_plus.dart';
import 'package:vibration/vibration.dart';
import 'dart:async';
import '../models/record.dart';
import './record_page.dart';
import '../widgets/record_list.dart';
import '../data/mock_data.dart';  // 暂时使用模拟数据
import '../services/database_service.dart';

class HomePage extends StatefulWidget {
  const HomePage({Key? key}) : super(key: key);

  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  StreamSubscription? _accelerometerSubscription;
  DateTime? _lastShakeTime;
  int _shakeCount = 0;
  bool _isNavigating = false;
  final _dbService = DatabaseService();
  List<Record> records = [];

  @override
  void initState() {
    super.initState();
    _initShakeDetection();
    _loadRecords();
  }

  /// 加载记录
  Future<void> _loadRecords() async {
    final loadedRecords = await _dbService.getAllRecords();
    setState(() {
      records = loadedRecords;
      records.sort((a, b) => b.createTime.compareTo(a.createTime));
    });
  }

  /// 初始化摇晃检测
  void _initShakeDetection() {
    _accelerometerSubscription = accelerometerEvents.listen((event) {
      // 主要检测左右摇晃（x轴）
      if (event.x.abs() > 25) {
        final now = DateTime.now();
        if (_lastShakeTime == null) {
          _lastShakeTime = now;
          _shakeCount = 1;
        } else {
          // 缩短有效时间窗口，要求更快的摇晃
          if (now.difference(_lastShakeTime!) < const Duration(milliseconds: 500)) {
            _shakeCount++;
            if (_shakeCount >= 2) {
              _navigateToRecordPageWithVibration();
              _shakeCount = 0;
              _lastShakeTime = null;
            }
          } else {
            // 重置计数
            _shakeCount = 1;
          }
          _lastShakeTime = now;
        }
      }
    });
  }

  /// 带震动的记账页面导航
  void _navigateToRecordPageWithVibration() async {
    if (_isNavigating) return;
    
    _isNavigating = true;
    // 添加震动反馈
    if (await Vibration.hasVibrator() ?? false) {
      Vibration.vibrate(duration: 200);
    }
    
    _navigateToRecordPage();
  }

  /// 导航到记账页面
  void _navigateToRecordPage([Record? record]) {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => RecordPage(
          record: record,
          onSave: (newRecord) async {
            if (record != null) {
              await _dbService.updateRecord(newRecord);
            } else {
              await _dbService.insertRecord(newRecord);
            }
            await _loadRecords();
          },
        ),
        maintainState: false,
      ),
    ).then((_) {
      _isNavigating = false;
    });
  }

  /// 删除记录
  void _deleteRecord(String recordId) async {
    await _dbService.deleteRecord(recordId);
    await _loadRecords();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('记账本'),
      ),
      body: RecordList(
        records: records,
        onRecordTap: _navigateToRecordPage,
        onRecordDelete: _deleteRecord,
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () => _navigateToRecordPage(),
        child: const Icon(Icons.add),
      ),
    );
  }

  @override
  void dispose() {
    _accelerometerSubscription?.cancel();
    super.dispose();
  }
}