import 'package:flutter/foundation.dart';
import 'package:flutter/services.dart';
import 'dart:async';

import 'zhiwen_platform_interface.dart';

/// An implementation of [ZhiwenPlatform] that uses method channels.
class MethodChannelZhiwen extends ZhiwenPlatform {
  /// The method channel used to interact with the native platform.
  @visibleForTesting
  final methodChannel = const MethodChannel('zhiwen');

  /// The event channel for receiving fingerprint enrollment progress.
  @visibleForTesting
  final progressEventChannel = const EventChannel('zhiwen_progress');

  /// 进度事件流控制器
  Stream<Map<String, dynamic>>? _progressStream;

  @override
  Future<String?> getPlatformVersion() async {
    final version = await methodChannel.invokeMethod<String>('getPlatformVersion');
    return version;
  }

  @override
  Future<bool> openDevice(String devicePath, int baudRate) async {
    final result = await methodChannel.invokeMethod<bool>(
      'openDevice',
      {'devicePath': devicePath, 'baudRate': baudRate},
    );
    return result ?? false;
  }

  @override
  Future<void> closeDevice() async {
    await methodChannel.invokeMethod('closeDevice');
  }

  @override
  Future<Map<String, dynamic>> enrollFingerprint(int userId) async {
    final result = await methodChannel.invokeMethod('enrollFingerprint', {'userId': userId});
    return Map<String, dynamic>.from(result as Map);
  }

  @override
  Future<Map<String, dynamic>> verifyFingerprint(int userId) async {
    final result = await methodChannel.invokeMethod('verifyFingerprint', {'userId': userId});
    return Map<String, dynamic>.from(result as Map);
  }

  @override
  Future<Map<String, dynamic>> deleteAllFingerprint() async {
    final result = await methodChannel.invokeMethod('deleteAllFingerprint');
    return Map<String, dynamic>.from(result as Map);
  }

  @override
  Future<Map<String, dynamic>> deleteOneFingerprint(int userId) async {
    final result = await methodChannel.invokeMethod('deleteOneFingerprint', {'userId': userId});
    return Map<String, dynamic>.from(result as Map);
  }

  @override
  Future<Map<String, dynamic>> identifyFingerprint() async {
    final result = await methodChannel.invokeMethod('identifyFingerprint');
    return Map<String, dynamic>.from(result as Map);
  }

  @override
  Future<Map<String, dynamic>> getUserCount() async {
    final result = await methodChannel.invokeMethod('getUserCount');
    return Map<String, dynamic>.from(result as Map);
  }

  /// 获取指纹录入进度事件流
  @override
  Stream<Map<String, dynamic>> get progressStream {
    _progressStream ??= progressEventChannel
        .receiveBroadcastStream()
        .map((event) => Map<String, dynamic>.from(event as Map));
    return _progressStream!;
  }
}