app-zj/lib/plugin/bluetooth_plugin.dart

import 'dart:io';

import 'package:flutter/services.dart';
import 'package:logger/logger.dart';

import '../main.dart';
import '../router/my_navigator.dart';

class BluetoothPlugin {
  factory BluetoothPlugin() => _instance;
  BluetoothPlugin._();
  static final BluetoothPlugin _instance = BluetoothPlugin._();
  static BluetoothPlugin get instance => _instance;

   final String delimiterStr = "_NIMBOT_";
  final MethodChannel _channel = const MethodChannel("io.flutter.plugins/bluetooth/methods");
  final EventChannel _onReceiveDataStream = const EventChannel('io.flutter.plugins/bluetooth/onDiscoveryDevice');
  final EventChannel _onDeviceStateStream = const EventChannel('io.flutter.plugins/bluetooth/onDeviceState');


  //是否打开蓝牙
  Future<bool> isBleOpen() async {
    if (Platform.isIOS) {
      return true;
    }
    return _channel.invokeMethod('isBleOpen').then<bool>((d) => d);
  }

  //安卓版本是否大于等于31
  Future<bool> isSDKIntGreaterOrEqual31() async {
    if (Platform.isIOS) {
      return true;
    }
    return _channel.invokeMethod('isSDKIntGreaterOrEqual').then<bool>((d) => d);
  }

  //开始扫描
  Future<int> startBluetoothDiscovery() async {
    if (Platform.isIOS) {
      return 0;
    }
    return _channel.invokeMethod('startBluetoothDiscovery').then<int>((d) => d);
  }

  //开始配对
  Future<int> startBluetoothPair(BlueDeviceInfo deviceInfo) async {
    if (Platform.isIOS) {
      return 0;
    }
    String deviceInfoStr = deviceInfo.deviceName+delimiterStr+deviceInfo.deviceMac+delimiterStr+deviceInfo.connectState;
    return _channel.invokeMethod('startBluetoothPair', deviceInfoStr).then<int>((d) => d);
  }

  //开始连接
  Future<int> startBluetoothConnect(BlueDeviceInfo deviceInfo) async {

    if (Platform.isIOS) {
      return 0;
    }
    String deviceInfoStr = deviceInfo.deviceName+delimiterStr+deviceInfo.deviceMac+delimiterStr+deviceInfo.connectState;
    return _channel.invokeMethod('startBluetoothConnect', deviceInfoStr).then<int>((d) => d);
  }

  //断开连接
  Future<int> endBluetoothConnect(BlueDeviceInfo deviceInfo) async {

    if (Platform.isIOS) {
      return 0;
    }
    String deviceInfoStr = deviceInfo.deviceName+delimiterStr+deviceInfo.deviceMac+delimiterStr+deviceInfo.connectState;
    return _channel.invokeMethod('endBluetoothConnect', deviceInfoStr).then<int>((d) => d);
  }


  //开始打印
  Future<int> startBluetoothPrint(BlueDeviceInfo deviceInfo) async {

    if (Platform.isIOS) {
      return 0;
    }
    String deviceInfoStr = deviceInfo.deviceName+delimiterStr+deviceInfo.deviceMac+delimiterStr+deviceInfo.connectState;
    return _channel.invokeMethod('startBluetoothPrint', deviceInfoStr).then<int>((d) => d);
  }






  /// 接收数据监听
  Stream<BlueDeviceInfo?> get onReceiveDataStream async* {

    yield* _onReceiveDataStream
        .receiveBroadcastStream()
        .map((buffer) {

      String str = buffer;
      List<String> strList = str.split(delimiterStr);

      if(strList.length == 3) {
        BlueDeviceInfo deviceInfo = BlueDeviceInfo(deviceName: strList[0], deviceMac: strList[1], connectState: strList[2]);
        return deviceInfo;
      }
      return null;
    });
  }

  /// 接收数据监听
  Stream<String?> get onDeviceStateStream async* {

    yield* _onDeviceStateStream
        .receiveBroadcastStream()
        .map((buffer) {

      return buffer.toString();
    });
  }
}


class DeviceState {

  static String scanStart = "scanStart";

  static String scanEnd = "scanEnd";

  static String pairEnd = "pairEnd";
}

class BlueDeviceInfo {

  String deviceName;
  String deviceMac;
  String connectState;

  String? _connectStateStr;

  BlueDeviceInfo({required this.deviceName, required this.deviceMac, required this.connectState});

  String get connectStateStr {

    if(connectState == '10') {
      _connectStateStr = "未配对";
    }
    if(connectState == '11') {
      _connectStateStr = "配对中";
    }
    if(connectState == '12') {
      _connectStateStr = "已配对";
    }
    if(connectState == '13') {
      _connectStateStr = "断开";
    }
    return _connectStateStr ?? "未知";
  }

  void connectSuccess() {
    connectState = '13';
  }

  void disConnectSuccess() {
    connectState = '12';
  }

  @override
  String toString() {
    return {'deviceName:': deviceName, "mac:": deviceMac, "state:": connectState}.toString();
  }
}