import 'package:flutter/material.dart';
import 'package:flutter_reactive_ble/flutter_reactive_ble.dart';
import 'package:star_lock/blue/sender_manage.dart';

import '../app_settings/app_settings.dart';
import 'io_tool/io_tool.dart';
import 'io_tool/manager_event_bus.dart';
import 'reciver_data.dart';

typedef ScanResultCallBack = void Function(List<DiscoveredDevice> devices);

class BlueManage{
  FlutterReactiveBle? _flutterReactiveBle;
  List<DiscoveredDevice> _scanDevices = [];
  QualifiedCharacteristic? qualifiedCharacteristic;
  DiscoveredCharacteristic? getDiscoveredCharacteristic;
  Uuid serviceId = Uuid.parse('0000FFF0-0000-1000-8000-00805F9B34FB');
  final int _limitLen = 20;

  static BlueManage? _manager;
  BlueManage._init();

  static BlueManage? shareManager(){
    _manager ??=  BlueManage._init();
    _manager!._initBlue();
    return _manager;
  }

  factory BlueManage() => shareManager()!;
  BlueManage? get manager => shareManager();

  void _initBlue(){
    _flutterReactiveBle = FlutterReactiveBle();
  }

  /// 开始扫描蓝牙设备
  void startScan(ScanResultCallBack scanResultCallBack) {
    _scanDevices.clear();
    _flutterReactiveBle!.scanForDevices(withServices: []).listen((device) {
      // 判断名字为空的直接剔除
      if(device.name.isEmpty){
        return;
      }
      // print("startScanDevice:${device}");
      if (((device.serviceUuids.isNotEmpty ? device.serviceUuids[0] : "").toString().contains("758824")) && (device.rssi >= -100)) {
        // print("11111111111111111:${device}");
        final knownDeviceIndex = _scanDevices.indexWhere((d) => d.id == device.id);

        if (knownDeviceIndex >= 0) {
          _scanDevices[knownDeviceIndex] = device;
        } else {
          _scanDevices.add(device);
        }
        // EventBusManager().eventBusFir(_scanDevices);
        scanResultCallBack(_scanDevices);
      }
      // _pushState();
    }, onError: (Object e) {
      print('Device scan fails with error: $e');
    });
  }

  /// 连接监听状态
  Future<void> connect(String deviceMAC) async {
    print("connect:$deviceMAC");
    _flutterReactiveBle!.connectToDevice(id: deviceMAC).listen((connectionStateUpdate) {
      print('ConnectionState for device $deviceMAC : ${connectionStateUpdate.connectionState}');
      // EventBusManager().eventBusFir(connectionStateUpdate);
      if(connectionStateUpdate.connectionState == DeviceConnectionState.connected){
        // getPublicKey(update.deviceId);
        // 如果状态是连接的开始发现服务
        discoverServices(deviceMAC);
      }
    }, onError: (Object e){
          print('Connecting to device $deviceMAC resulted in error $e');
        }
    );
  }

  Future<void> disconnect(String deviceMAC) async {
    try {
      print('disconnecting to device: $deviceMAC');
    } on Exception catch (e, _) {
      print("Error disconnecting from a device: $e");
    } finally {
      EventBusManager().eventBusFir(ConnectionStateUpdate(
        deviceId: deviceMAC,
        connectionState: DeviceConnectionState.disconnected,
        failure: null,
      ));
    }
  }

  // 扫描服务，并过滤服务
  Future<List<DiscoveredService>> discoverServices(String deviceId) async {
    try {
      // print('Start discovering services for: $deviceId');
      List<DiscoveredService> result = await _flutterReactiveBle!.discoverServices(deviceId);
      // print("mmmmmmmmm$result");
      if(result.isNotEmpty){
        for (var i = 0; i < result.length; i++) {
          DiscoveredService discoveredService = result[i];
          // print("objectdiscoveredService.serviceId.toString() ${discoveredService.serviceId.toString()}");
          if (discoveredService.serviceId.toString() == "fff0"){
            // getDiscoveredService = discoveredService;
            for (var j = 0; j < discoveredService.characteristics.length; j++) {
              DiscoveredCharacteristic discoveredCharacteristic = discoveredService.characteristics[j];

              // print("hhhhhhhhhh${result[i].characteristicIds[j].toString()}");
              if (discoveredCharacteristic.characteristicId.toString() == "fff1") {
                // 订阅用
                getDiscoveredCharacteristic = discoveredCharacteristic;
                // print("1111111111111111characteristicId:${result[i].characteristicIds[j].toString()} serviceId:${result[i].serviceId} deviceId:$deviceId");
              }
              if (discoveredCharacteristic.characteristicId.toString() == "fff2") {
                // print("1111111111111111characteristicId:${discoveredCharacteristic.characteristicId} serviceId:${serviceId} deviceId:$deviceId");
                qualifiedCharacteristic = QualifiedCharacteristic(characteristicId: discoveredCharacteristic.characteristicId, serviceId:serviceId , deviceId: deviceId);
              }
            }
          }
        }
      }
      subScribeToCharacteristic(QualifiedCharacteristic(characteristicId: getDiscoveredCharacteristic!.characteristicId, serviceId: Uuid.parse("fff0"), deviceId: deviceId));
      print('Discovering services finished');

      EventBusManager().eventBusFir(qualifiedCharacteristic);
      return result;
    } on Exception catch (e) {
      print('Error occurred when discovering services: $e');
      rethrow;
    }
  }

  // 听上报来的数据,参数来自前面扫描到的结果
  subScribeToCharacteristic(QualifiedCharacteristic characteristic) {
    _flutterReactiveBle!.subscribeToCharacteristic(characteristic).listen((data) {
      // code to handle incoming data
      print("subscribeToCharacteristic: deviceId = ${characteristic.deviceId} characteristicId =${characteristic.characteristicId}---上报来的数据data = $data");
      CommandReciverManager.appDataReceive(data, "");
    }, onError: (dynamic error) {
      print("subscribeToCharacteristic error:$error");
    });
  }

  // 写入
  Future<void> writeCharacteristicWithResponse(QualifiedCharacteristic characteristic, List<int> value) async {
    print('Write with characteristicId：${characteristic.characteristicId} serviceId：${characteristic.serviceId} deviceId：${characteristic.deviceId} value : $value \nhexStr:${radixString(value)}');

    try {
      List<int> valueList = value;
      List subData = splitList(valueList, _limitLen);
      print('得到的分割数据:$subData');

      for (int i = 0; i < subData.length; i++) {
        await _flutterReactiveBle!.writeCharacteristicWithResponse(characteristic, value: subData[i]).then((value) async {
          await Future.delayed(const Duration(milliseconds: 1))
              .then((value) async {
            print('分包发送成功了');
          });
        });
      }
    } on Exception catch (e, s) {
      print('Error occurred when writing: $e');
      // ignore: avoid_print
      print(s);
      rethrow;
    }
  }



  // 读取
  Future<List<int>> readCharacteristic(QualifiedCharacteristic characteristic) async {
    try {
      final result = await _flutterReactiveBle!.readCharacteristic(characteristic);
      print("readListresult$result");
      return result;
    } on Exception catch (e, s) {
      print('Error occurred when reading ${characteristic.characteristicId} : $e',);
      rethrow;
    }
  }


  Future<void> writeCharacteristicWithoutResponse(
      QualifiedCharacteristic characteristic, List<int> value) async {
    try {
      await _flutterReactiveBle!.writeCharacteristicWithoutResponse(characteristic,
          value: value);
    } on Exception catch (e, s) {
      // ignore: avoid_print
      print(s);
      rethrow;
    }
  }

}