import 'package:flutter/services.dart';

class LocationService {
  static final LocationService _instance = LocationService._internal();

  /// 获取单例
  factory LocationService() => _instance;

  // 方法通道
  final MethodChannel _methodChannel = MethodChannel(
    'com.yunqiinnovation.location_service',
  );

  // 事件通道 - 简化为只使用数据和状态通道
  late final EventChannel _dataEventChannel;
  late final EventChannel _statusEventChannel;

  // 事件流
  late final Stream<dynamic> _dataStream;
  late final Stream<dynamic> _statusStream;

  // 获取事件流
  Stream<dynamic> get onDataReceived => _dataStream;

  // 状态流直接传递原始数据
  Stream<dynamic> get onStatusUpdated => _statusStream;

  // 内部构造函数
  LocationService._internal() {
    _dataEventChannel = const EventChannel(
      'com.yunqiinnovation.music_service/data_events',
    );
    _statusEventChannel = const EventChannel(
      'com.yunqiinnovation.music_service/status_events',
    );

    // 初始化事件流
    _dataStream = _dataEventChannel.receiveBroadcastStream();
    _statusStream = _statusEventChannel.receiveBroadcastStream();
  }

  Future<Map<String, double>> location() async {
    final result = await _methodChannel.invokeMethod<Map>('location');
    return {
      'latitude': result?['longitude'] ?? 0.0,
      'longitude': result?['longitude'] ?? 0.0,
    };
  }
}