import 'dart:async';

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

import '../tools/toast.dart';
import 'io_tool/io_model.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);
//连接状态回调
typedef ConnectStateCallBack = Function(DeviceConnectionState connectionState);

class BlueManage{
  FlutterReactiveBle? _flutterReactiveBle;
  final List<DiscoveredDevice> _scanDevices = [];

  Uuid serviceId = Uuid.parse('0000FFF0-0000-1000-8000-00805F9B34FB');
  Uuid characteristicIdSubscription = Uuid.parse("fff1");//用来订阅的特征id
  Uuid characteristicIdWrite = Uuid.parse("fff2");// 用来写入的特征id
  String connectDeviceMacAddress = "";
  String connectDeviceName = "";

  // final int _limitLen = 20;

  // 监听发送事件
  StreamSubscription<EventSendModel>? _sendStreamSubscription;
  StreamSubscription? _scanSubscription;

  // 监听蓝牙连接状态
  DeviceConnectionState? deviceConnectionState = DeviceConnectionState.disconnected;

  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();
    print("蓝牙功能初始化了");
    _initSendStreamSubscription();
  }

  void _initSendStreamSubscription() {
    _sendStreamSubscription ??= EventBusManager().eventBus!.on<EventSendModel>().listen((
          EventSendModel model) {
        if (model.sendChannel == DataChannel.ble) {
          // managerAppWriteData(model.data);
          writeCharacteristicWithResponse(model.data);
        }
      });
  }

  /// 开始扫描蓝牙设备
  void startScan(bool isScanAll, ScanResultCallBack scanResultCallBack) {
    _scanDevices.clear();
    _scanSubscription = _flutterReactiveBle!.scanForDevices(withServices: []).listen((device) {
      // 判断名字为空的直接剔除
      if(device.name.isEmpty){
        return;
      }
      // print("startScanDevice:${device}");
      // 判断是否
      if(isScanAll == true){
        if (((device.serviceUuids.isNotEmpty ? device.serviceUuids[0] : "").toString().contains("758824"))&& (device.rssi >= -100)) {
          // 查询id相同的元素
          final knownDeviceIndex = _scanDevices.indexWhere((d) => d.id == device.id);
          // 不存在的时候返回-1
          if (knownDeviceIndex >= 0) {
            _scanDevices[knownDeviceIndex] = device;
          } else {
            _scanDevices.add(device);
          }

          scanResultCallBack(_scanDevices);
        }
      }else{
        if (((device.serviceUuids.isNotEmpty ? device.serviceUuids[0] : "").toString().contains("758824")) && ((device.serviceUuids.isNotEmpty ? device.serviceUuids[0] : "").toString()[31] != "1") && (device.rssi >= -100)) {
          // 查询id相同的元素
          final knownDeviceIndex = _scanDevices.indexWhere((d) => d.id == device.id);
          // 不存在的时候返回-1
          if (knownDeviceIndex >= 0) {
            _scanDevices[knownDeviceIndex] = device;
          } else {
            _scanDevices.add(device);
          }
          // print("_scanDevices:$_scanDevices");
          scanResultCallBack(_scanDevices);
        }
      }

    }, onError: (Object e) {
      print('Device scan fails with error: $e');
    });
  }

  /// 连接监听状态
  Future<void> connect(String deviceMAC, String deviceName, {ConnectStateCallBack? connectStateCallBack, bool? isFrist = false ,bool isShowLoading = true}) async {
    connectDeviceMacAddress = deviceMAC;
    connectDeviceName = deviceName;
    print("connectDeviceId:$connectDeviceMacAddress  connectDeviceName:$connectDeviceName");

    if(isShowLoading){
      EasyLoading.show();
      Future.delayed(const Duration(seconds: 10), () { //asynchronous delay
        print("10s之后 菊花没有隐藏的话，强制隐藏菊花");
        if(EasyLoading.isShow){
          EasyLoading.dismiss();
        }
      });
    }
    _flutterReactiveBle!.connectToDevice(id: connectDeviceMacAddress, connectionTimeout: const Duration(seconds: 100000)).listen((connectionStateUpdate) async {
      // 获取状态
      deviceConnectionState = connectionStateUpdate.connectionState;
      print('ConnectionState for device $deviceMAC : ${connectionStateUpdate.connectionState}');

      // if(connectionStateUpdate.connectionState != DeviceConnectionState.connected){
      //   EasyLoading.dismiss();
      // }

      if(connectionStateUpdate.connectionState == DeviceConnectionState.connected){
        // 如果状态是连接的开始发现服务
        // await discoverServices(connectDeviceId, connectDeviceName);
        try {
          // print('Start discovering services for: $deviceId');
          List<DiscoveredService> result = await _flutterReactiveBle!.discoverServices(deviceMAC);
          // print("mmmmmmmmm$result");
          if(result.isNotEmpty){
            for (var i = 0; i < result.length; i++) {
              DiscoveredService discoveredService = result[i];
              if (discoveredService.serviceId.toString() == "fff0"){
                // getDiscoveredService = discoveredService;
                for (var j = 0; j < discoveredService.characteristics.length; j++) {
                  DiscoveredCharacteristic discoveredCharacteristic = discoveredService.characteristics[j];
                  if (discoveredCharacteristic.characteristicId.toString() == "fff1") {
                    // 订阅用
                    characteristicIdSubscription = discoveredCharacteristic.characteristicId;
                    // print("Subscription characteristicId:${result[i].characteristicIds[j].toString()} serviceId:${result[i].serviceId} deviceId:$deviceMAC");
                  }
                  if (discoveredCharacteristic.characteristicId.toString() == "fff2") {
                    // 用来写入
                    characteristicIdWrite= discoveredCharacteristic.characteristicId;
                    // print("1111111111111111characteristicId:${discoveredCharacteristic.characteristicId} serviceId:${serviceId} deviceId:$deviceId");
                  }
                }
              }
            }
          }else{
            EasyLoading.dismiss();
          }
          _subScribeToCharacteristic(QualifiedCharacteristic(characteristicId: characteristicIdSubscription, serviceId: Uuid.parse("fff0"), deviceId: deviceMAC));
          print('Discovering services finished');

          if(isFrist == true){
            // var publicKey = await Storage.getStringList(saveBluePublicKey);
            // List<int> publicKeyDataList = changeStringListToIntList(publicKey!);
            // if(publicKeyDataList.isNotEmpty ){
            //   IoSenderManage.getPrivateKey(
            //       lockId:BlueManage().connectDeviceName,
            //       keyID:"1",
            //       authUserID:"1",
            //       nowTime:1,
            //       publicKeyData:publicKeyDataList,
            //       needAuthor:1);
            // }else{
              // 第一次添加锁的时候需要先获取公钥
              IoSenderManage.getPublicKey(lockId: deviceName);
            // }
          }
          connectStateCallBack!(connectionStateUpdate.connectionState);
        } on Exception catch (e) {
          EasyLoading.dismiss();
          print('Error occurred when discovering services: $e');
          rethrow;
        }
      }
    }, onError: (Object e){
      EasyLoading.dismiss();
      print('Connecting to device $deviceMAC resulted in error $e');
        }
    );
  }

  /// 停止扫描蓝牙设备
  Future<void> stopScan() async {
    await _scanSubscription?.cancel();
    _scanSubscription = null;
  }

  // 断开连接
  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,
      // ));
    }
  }

  // 重新连接
  Future<void> judgeReconnect(String deviceMAC, String deviceName, ConnectStateCallBack? connectStateCallBack, {bool isShowLoading = true}) async {
    // print("11111111$deviceConnectionState");
    if(deviceMAC.isEmpty){
      Toast.show(msg: "未连接到设备，请确保在设备附近，设备未被连接，设备已打开");
      // return;
    }
    if(deviceConnectionState == DeviceConnectionState.connected){
      // print("2222222:$deviceConnectionState");
      if(isShowLoading){
        EasyLoading.show();
        Future.delayed(const Duration(seconds: 10), () { //asynchronous delay
          print("10s之后 菊花没有隐藏的话，强制隐藏菊花");
          if(EasyLoading.isShow){
            EasyLoading.dismiss();
          }
        });
      }
      connectStateCallBack!(deviceConnectionState!);
    }else{
      // print("333333333:${deviceConnectionState}");
      connect(deviceMAC, deviceName, isShowLoading: false, connectStateCallBack: (state){
        // print("44444444:${state}");
        // if(deviceConnectionState == DeviceConnectionState.connected){
          connectStateCallBack!(state);
        // }else {
        //   Toast.show(msg: "连接设备失败，请确保在设备附近，设备未被连接，设备已打开");
        // }
      });
    }
  }

  // 扫描服务，并过滤服务
  // Future<List<DiscoveredService>> discoverServices(String deviceMAC, String deviceName, {bool? isFrist = false}) async {
  //   try {
  //     // print('Start discovering services for: $deviceId');
  //     List<DiscoveredService> result = await _flutterReactiveBle!.discoverServices(deviceMAC);
  //     // print("mmmmmmmmm$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
  //               characteristicIdSubscription = discoveredCharacteristic.characteristicId;
  //               // getDiscoveredCharacteristic = discoveredCharacteristic;
  //               print("1111111111111111characteristicId:${result[i].characteristicIds[j].toString()} serviceId:${result[i].serviceId} deviceId:$deviceMAC");
  //             }
  //             if (discoveredCharacteristic.characteristicId.toString() == "fff2") {
  //               // 用来写入
  //               characteristicIdWrite= discoveredCharacteristic.characteristicId;
  //               // print("1111111111111111characteristicId:${discoveredCharacteristic.characteristicId} serviceId:${serviceId} deviceId:$deviceId");
  //               // qualifiedCharacteristic = QualifiedCharacteristic(characteristicId: discoveredCharacteristic.characteristicId, serviceId:serviceId , deviceId: deviceId);
  //             }
  //           }
  //         }
  //       }
  //     }
  //     _subScribeToCharacteristic(QualifiedCharacteristic(characteristicId: characteristicIdSubscription, serviceId: Uuid.parse("fff0"), deviceId: deviceMAC));
  //     print('Discovering services finished');
  //
  //     if(isFrist == true){
  //       // 第一次添加锁的时候需要先获取公钥
  //       IoSenderManage.getPublicKey(lockId: deviceName);
  //     }
  //     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
  var allData = <int>[];
  _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");
      var dataLen = 0;// 高16位用来指示后面数据块内容的长度

      if((data[0] == 0xEF)&&(data[1] == 0x01)&&(data[2] == 0xEE)&&(data[3] == 0x02)){
        // 当包有头时
        // 判断是否需要分包
        dataLen = data[8] * 256 + data[9];
        print("dataLen1111:$dataLen getDataLength:${data.length}");
        if(dataLen + 12 > data.length){
          // 当前包的长度小于实际的包时 分包添加 不解析
          allData.addAll(data);
        }else{
          // 当前包的长度小于实际的包时 不分包 解析
          allData.addAll(data);
          CommandReciverManager.appDataReceive(allData);
          // 发送完解析初始化数组
          allData = <int>[];
        }
      }else{
        // 当包没有头时 是分包的包 直接添加
        allData.addAll(data);
        // var len = allData[8] * 256 + allData[9];
        print("dataLen222:$dataLen");
        if(dataLen <= (allData.length - 14)){
          // 当长度小于等于当前包的数据时 直接解析数据
          CommandReciverManager.appDataReceive(allData);
          // 发送完解析初始化数组
          allData = <int>[];
        }
      }
    }, onError: (dynamic error) {
      EasyLoading.dismiss();
      print("subscribeToCharacteristic error:$error");
    });
  }

  // 写入
  Future<void> writeCharacteristicWithResponse(List<int> value) async {
    QualifiedCharacteristic characteristic = QualifiedCharacteristic(characteristicId: characteristicIdWrite, serviceId: serviceId, deviceId: connectDeviceMacAddress);
    print('Write with characteristicId：${characteristic.characteristicId} serviceId：${characteristic.serviceId} deviceId：${characteristic.deviceId} value : $value \nhexStr:${radixHex16String(value)}');
    int mtuLength = await _flutterReactiveBle!.requestMtu(deviceId: characteristic.deviceId, mtu: 250);
    print("mtuLength:$mtuLength");
    try {
      List<int> valueList = value;
      List subData = splitList(valueList, mtuLength);
      print('得到的分割数据:$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;
    }
  }

  disposed(){
    _sendStreamSubscription?.cancel();
  }
}