const event = require('./event');
const penDataHandle = require('./penDataHandle');
const utils = require('./utils');

class TTSDK {
  constructor() {
    // 离线接收进行量
    this.gofflineDataProgress = 0
    // 离线数据量
    this.offlineDataNum = 0
    // 进度
    this.gefflineCounter = 0
    // 已连接蓝牙deviceId
    this.connectDeviceId = null
    // 已连接serviceid
    this.connectServiceId = null
    // 已连接characteristicId
    this.connectCharacteristicId = null
    this.finishFlag = false
    this.allDevices = {}
    this.allDevices.foundDevices = []
    this.blueToothOn = false
  }
  // 监听本地蓝牙状态
  listenBlueState(blueToothON) {
    tt.onBluetoothAdapterStateChange(res => {
      if (res.available) {
        tt.offBluetoothAdapterStateChange()
        if (blueToothOn) {
          blueToothON();
        }
      }
    })
  }
  // 初始化蓝牙
  initBlueTooth(success, fail) {
    tt.openBluetoothAdapter({
      success: (res) => {
        if (success) {
          success()
        }
      },
      fail: (res) => {
        if (fail) {
          fail()
        }
      }
    })
  }
  // 读取本地蓝牙适配器状态信息
  getLocalBlueToothState() {
    return tt.getBluetoothAdapterState({
      success: (res) => {
        return {
          isDiscovering: res.discovering,
          isAvailable: res.available
        }
      },
    })
  }
  // 监听连接的蓝牙设备断开
  listenBlueConnection() {
    tt.onBLEConnectionStateChange((result) => {
      if (this.connectDeviceId === result.deviceId && !result.connected) {
        event.emit('unConnect', true)
      }
    })
  }
  // 搜索附近的蓝牙设备
  searchBlueTooth(success, fail) {
    tt.startBluetoothDevicesDiscovery({
      allowDuplicatesKey: true,
      success: (res) => {
        if (success) {
          success();
        }
      },
      fail: () => {
        if (fail) {
          fail()
        }
      }
    })
  }
  // 查找到的设备列表
  showBlueToothList(that) {
    let flag = true
    tt.onBluetoothDeviceFound(res => {
      res.devices.forEach(device => {
        let penCheck = ab2hex(device.advertisData)
        if (penCheck.length < 10) {
          return
        }
        if (penCheck.slice(0, 4).join(':').toUpperCase() !== '31:32:33:34') {
          return
        }
        device.macAddress = penCheck.slice(4, 10).reverse().join(':').toUpperCase();
        if (this.allDevices.foundDevices.length !== 0) {
          flag = this.allDevices.foundDevices.every((item, index) => {
            return item.deviceId !== device.deviceId
          })
        }
        if (flag) {
          this.allDevices.foundDevices.push(device)
        }
      })
      // console.log(penData)
      that.setData({
        blueToothList: this.allDevices
      })
    })
  }
  // 停止蓝牙搜索
  stopBlueToothSearch(success, fail) {
    tt.stopBluetoothDevicesDiscovery({
      success: (res) => {
        if (success) {
          success()
        }
      },
      fail: () => {
        if (fail) {
          fail()
        }
      }
    })
  }
  //释放蓝牙
  closeBlueTooth(success, fail) {
    tt.closeBluetoothAdapter({
      success: () => {
        if (success) {
          success()
        }
      },
      fail: () => {
        if (fail) {
          fail()
        }
      }
    })
  }
  // 创建蓝牙连接
  createBlueToothConnection(deviceId, success, fail) {
    tt.connectBLEDevice({
      deviceId,
      success: () => {
        tt.stopBluetoothDevicesDiscovery({
          success: (res) => {
            console.log('stop')
          },
        })
        if (success) {
          success();
        }
      },
      fail: () => {
        if (fail) {
          fail();
        }
      }
    });
  };
  // 断开蓝牙设备
  unConnectBlueTooth(deviceId, success, fail) {
    tt.disconnectBLEDevice({
      deviceId,
      success: () => {
        if (success) {
          success();
        }
      },
      fail: () => {
        if (fail) {
          fail();
        }
      }
    })
  }
  // 获取蓝牙色设备服务
  getBlueToothService(deviceId, success, fail) {
    tt.getBLEDeviceServices({
      deviceId,
      success: (res) => {

        if (success) {
          success()
        }
      },
      fail: () => {
        if (fail) {
          fail()
        }
      }
    })
  }
  // 获取蓝牙设备某个服务的所有特征值
  getBlueToothCharaceristics(deviceId, serviceId) {
    tt.getBLEDeviceCharacteristics({
      deviceId,
      serviceId,
      success: (res) => {
        res.characteristics.forEach((item) => {
          if (item.properties.notify || item.properties.indicate) {
            tt.notifyBLECharacteristicValueChange({
              state: true,
              deviceId,
              serviceId,
              characteristicId: item.uuid,
              success: () => {
                console.log('notifyBLECharacteristicValueChange success------: ' + res.errMsg)
              }
            })
          }
          // 向蓝牙写数据
          if (item.properties.write && item.uuid == '0000F102-0000-1000-8000-00805F9B34FB') {
            this.connectDeviceId = deviceId
            this.connectServiceId = serviceId
            this.connectCharacteristicId = item.uuid
          }
        })
        this.getPenModal();
        this.setRTCTime(new Date().getTime())
      },
      fail: () => {

      }
    })
    // 监听 第一时间获取数据
    tt.onBLECharacteristicValueChange((res) => {
      switch (res.characteristicId) {
        // 实时数据
        case "0000FFF1-0000-1000-8000-00805F9B34FB":
          var dataArr = ab2hex(characteristic.value)
          let dataLength = dataArr.length / 10
          for (let i = 0; i < dataLength; i++) {
            penDataHandle.splitData(hex2Bytes(dataArr.slice(i * 10, (i + 1) * 10)))
          }
          break;
          // 离线数据
        case '0000F202-0000-1000-8000-00805F9B34FB':
          let dataArray = ab2hex(res.value)
          let dataLength1 = dataArray.length / 10
          for (let i = 0; i < dataLength1; i++) {
            let newArr = dataArray.slice(i * 10, (i + 1) * 10)
            let arr = hex2Bytes(newArr)
            penDataHandle.splitData(arr, false)
          }
          break;
        case "0000F101-0000-1000-8000-00805F9B34FB":
          let dataArr1 = ab2hex(res.value)
          let arr = hex2Bytes(dataArr1);
          getDataInfo(arr, this);
          break;
        default:
          break;
      }
    })
  }
  // 写入总封装
  dealData(index, arrData, success, fail) {
    let buffer = new ArrayBuffer(index)
    let bufferView = new DataView(buffer)
    for (let i = 0; i < index; i++) {
      bufferView.setUint8(i, arrData[i])
    }
    tt.writeBLECharacteristicValue({
      characteristicId: this.connectCharacteristicId,
      serviceId: this.connectServiceId,
      deviceId: this.connectDeviceId,
      value: buffer,
      success: () => {
        if (success) {
          success();
        }
      },
      fail: () => {
        if (fail) {
          fail()
        }
      }
    })
  }
  // 写入笔名
  setPenName(penName, success, fail) {
    let strBytesArr = strToUtf8(penName);
    let byteLength = strBytesArr.length;
    let offLineBuffer = new ArrayBuffer(byteLength + 2);
    let DataViews = new DataView(offLineBuffer);
    DataViews.setUint8(0, 0xA2);
    DataViews.setUint8(1, byteLength);
    for (let i = 0; i < byteLength; i++) {
      DataViews.setUint8(i + 2, strBytesArr[i])
    }
    tt.writeBLECharacteristicValue({
      characteristicId: this.connectCharacteristicId,
      serviceId: this.connectServiceId,
      deviceId: this.connectDeviceId,
      value: buffer,
      success: () => {
        if (success) {
          success();
        }
      },
      fail: () => {
        if (fail) {
          fail()
        }
      }
    })
  }
  // 请求笔名
  getPenName(success, fail) {
    this.dealData(3, [0xa0, 0x01, 0xff], success, fail)
  }
  //  获取MAC地址
  getMACAddress(success, fail) {
    this.dealData(3, [164, 1, 255], success, fail)
  }
  // 获取蓝牙固件版本
  getPenFirmWare(success, fail) {
    this.dealData(3, [0xa6, 0x01, 0xff], success, fail)
  }
  // 获取剩余电量
  getPenBattery(success, fail) {
    this.dealData(3, [0xa8, 0x01, 0xff], success, fail)
  }
  // 写入rtc时间
  // 传入时间为想改写时间的时间戳
  setRTCTime(RTCTime, success, fail) {
    let timeStamp = (RTCTime - 1262275200000) / 1000;
    console.log(timeStamp, 'timestamp')
    this.dealData(6, [0xac, 0x04, timeStamp & 0xff, (timeStamp >> 8) & 0xff, (timeStamp >> 16) & 0xff, (timeStamp >> 24) & 0xff], success, fail);
  }
  // 请求rtc时间
  getRTCTime(success, fail) {
    this.dealData(3, [0xaa, 0x01, 0xff], success, fail)
  }
  // 写入自动关机时间
  setPenAutoOff(offTime, success, fail) {
    if (offTime > 120 || offTime < 0) {
      return console.error('自动关机时间的范围为0~120')
    }
    this.dealData(4, [0xb2, 0x02, offTime % 256, offTime / 256], success, fail)
  }
  // 请求自动关机时间
  getPenAutoOff(success, fail) {
    this.dealData(3, [0xb0, 0x01, 0xff], success, fail)
  }
  // 获取已使用内存
  getPenMemory(success, fail) {
    this.dealData(3, [0xb6, 0x01, 0xff], success, fail)
  }
  // 获取是否点笔开机
  getPenClickMode(success, fail) {
    this.dealData(3, [0xb8, 0x01, 0xff], success, fail)
  }
  // 设置点笔开机
  setPenClickMode(isClick, success, fail) {
    this.dealData(3, [0xba, 0x01, isClick ? 0x01 : 0x00], success, fail)
  }
  // 设置是否蜂鸣
  setPenBeep(isOn, success, fail) {
    this.dealData(3, [0xbe, 0x01, isOn ? 0x01 : 0x00], success, fail)
  }
  // 获取是否蜂鸣
  getPenBeep(success, fail) {
    this.dealData(3, [0xbc, 0x01, 0xff], success, fail)
  }
  //  恢复出厂设置
  restoreFactory(success, fail) {
    this.dealData(3, [0xb4, 0x01, 0xff, success, fail])
  }
  // 写入压力敏感度
  setPenSensor(level, success, fail) {
    this.dealData(3, [0xd2, 0x01, level], success, fail)
  }
  // 获取压力敏感度
  getPenSensor(success, fail) {
    this.dealData(3, [0xd0, 0x01, 0xff], success, fail)
  }
  // 设置LED灯颜色
  setPenLedColor(color, success, fail) {
    this.dealData(3, [0xd6, 0x01, color], success, fail)
  }
  // 获取led颜色
  getPenLedColor(success, fail) {
    this.dealData(3, [0xd4, 0x01, 0xff], success, fail)
  }
  // 获取压力校正值
  getPenSensorRegulate(success, fail) {
    this.dealData(3, [0xd8, 0x01, 0xff], success, fail)
  }
  // 获取mcu固件版本
  getMCUVersion(success, fail) {
    this.dealData(3, [0xda, 0x01, 0xff], success, fail)
  }
  // 获取笔的类型
  getPenModal(success, fail) {
    this.dealData(3, [0xe4, 0x01, 0xff], success, fail)
  }
  // 获取点码类型
  getPenPointType(success, fail) {
    this.dealData(3, [0xe6, 0x01, 0xff], success, fail)
  }
  // led设置开关
  setLedConfig(isOn, success, fail) {
    this.dealData(3, [0xee, 0x01, isOn ? 0x01 : 0x00], success, fail)
  }
  // 获取led是够可以设置的结果
  getLedConfig(success, fail) {
    this.dealData(3, [0xec, 0x01, 0xff], success, fail)
  }
  // 获取离线数据量大小
  getPenOfflineDataSize(success, fail) {
    this.dealData(3, [0xc0, 0x01, 0xff], success, fail)
  }
  // 开始获得离线数据
  startGetOfflineData(success, fail) {
    this.dealData(3, [0xc2, 0x01, 0x00], success, fail)
  }
  // 停止获得离线数据
  stopGetOfflineData(success, fail) {
    this.dealData(3, [0xc2, 0x01, 0x01], success, fail)
  }
  // 暂停获得离线数据
  pauseGetOfflineData(success, fail) {
    this.dealData(3, [0xcb, 0x01, 0x00], success, fail)
  }
  // 继续获得离线数据
  continueGetOfflineData(success, fail) {
    this.dealData(3, [0xcb, 0x01, 0x01], success, fail)
  }
  // 删除离线数据
  deleteOfflineData(success, fail) {
    this.dealData(3, [0xc8, 0x01, 0xff], success, fail)
  }
  // 确认离线数据已经接受完毕
  confirmOfflineDataDone(success, fail) {
    this.dealData(3, [0xc6, 0x01, this.finishFlag ? 0x00 : 0x01], success, fail)
  }
}

// arrayBuffer转16进制字符串数组
const ab2hex = (buffer) => {
  return Array.prototype.map.call(new Uint8Array(buffer), x => ('00' + x.toString(16)).slice(-2))
}
// hex to bytes
const hex2Bytes = (arr) => {
  return arr.map((item) => {
    return parseInt(item, 16)
  })
}
const getDataInfo = (lpData, doneFlag) => {
  // console.log(doneFlag)
  const data = {};
  let len = 0;
  let val = lpData.slice(2, len + 2);
  switch (lpData[0]) {
    case 0xa1:
      len = lpData[1] & 0xff;
      val = byteToString(lpData.slice(2, len + 2));
      emitData({
        data: val,
        cmd: 'getPenName'
      })
      break;
    case 0xa3:
      if (lpData[2] === 0x00) {
        emitData({
          cmd: 'setPenName',
          data: true
        })
      } else {
        emitData({
          cmd: 'setPenName',
          data: false
        })
      }
      break
    case 0xa5:
      let macAddress = lpData.slice(2, lpData.length).map((item) => {
        return MAC(item)
      }).join(':')
      emitData({
        cmd: 'getMacAddress',
        data: macAddress
      })
      break;
    case 0xa7:
      let res = byteToString(lpData.slice(2, lpData.length))
      emitData({
        cmd: 'getBlueToothVersion',
        data: res
      })
      break;
    case 0xa9:
      let penBattery = lpData[2] & 0xff;
      let penIsCharging = lpData[3] === 0x01;
      emitData({
        cmd: 'getPenBattery',
        data: {
          penBattery: `${penBattery}%`,
          penIsCharging
        }
      })
      break;
      // 获取笔的rtc时间
    case 0xab:
      const startTime = 1262275200000;
      let currentTime = (new Date()).getTime();
      let mPen_time = (lpData[2] & 0xff) | ((lpData[3] << 8) & 0xff00) | ((lpData[4] << 16) & 0xff0000) | ((lpData[5] << 24) & 0xff000000);
      let timeOffset = (currentTime - startTime) / 1000
      let offTimeoff = timeOffset - mPen_time
      console.log(offTimeoff, '时间差')
      penDataHandle.changeOffset(offTimeoff);
      emitData({
        cmd: "getRTCtime",
        data: (mPen_time * 1000 + startTime)
      })
      break;
    case 0xad:
      emitData({
        cmd: 'setRTCtime',
        data: lpData[2] === 0x00
      })
      break;
    case 0xb1:
      val = lpData.slice(2, 4);
      let penAutoShutDown = (val[0] & 0xff) | ((val[1] << 8) & 0xff00)
      emitData({
        cmd: 'getPenAutoShutDownTime',
        data: penAutoShutDown
      })
      break;
    case 0xb3:
      emitData({
        cmd: 'setPenAutoOff',
        data: lpData[2] === 0x00
      })
      break
    case 0xb5:
      emitData({
        cmd: 'RestoreFactorySettings',
        data: lpData[2] === 0x00
      })
      break
    case 0xb7:
      console.log(lpData[2] & 0xff)
      emitData({
        cmd: 'getUsedMemory',
        data: lpData[2] & 0xff + '%'
      })
      break;
    case 0xb9:
      emitData({
        cmd: 'getPenClickMode',
        data: lpData[2] === 0x01
      })
      break
    case 0xbb:
      emitData({
        cmd: 'setPenClickMode',
        data: lpData[2] === 0x00
      })
      break
    case 0xbd:
      emitData({
        cmd: 'getPenBeep',
        data: lpData[2] === 0x01
      })
      break
    case 0xbf:
      emitData({
        cmd: 'setPenBeep',
        data: lpData[2] === 0x00
      })
      break
    case 0xd1:
      emitData({
        cmd: 'getPenSensor',
        data: lpData[2] & 0xff
      })
      break
    case 0xd3:
      emitData({
        cmd: "setPenSensor",
        data: lpData[2] === 0x00
      })
      break
    case 0xd5:
      emitData({
        cmd: 'getLEDColor',
        data: lpData[2] & 0xff
      })
      break
      // case 0xd7:
      //   emitData({
      //     cmd: "setPenSensor",
      //     data: lpData[2] === 0x00
      //   })
      //   break
    case 0xd9:
      var sensitivityCorrection = "20g:" + (((lpData[3] << 8) & 0xff00) + (lpData[2] & 0xff)) + "300g:" + (((lpData[5] << 8) & 0xff00) + (lpData[4] & 0xff));
      emitData({
        cmd: "getSensitivityCorrection",
        data: sensitivityCorrection
      })
      break;
    case 0xdb:
      len = lpData[1] & 0xff;
      val = lpData.slice(2, len + 2);
      var isR = lpData[2] & 0xff;
      var mcu_firmware = "";
      if (isR) {
        mcu_firmware = "MCUF_" + "R" + (lpData[4] & 0xff * 10) + (lpData[5] & 0xff) + (data[6] & 0xff);
      } else {
        mcu_firmware = "MCUF_" + "B" + (lpData[4] & 0xff) + (lpData[5] & 0xff) + (lpData[6] & 0xff);
      }
      emitData({
        cmd: 'getMCUVersion',
        data: mcu_firmware
      })
      break;
    case 0xe1:
      let oid4CodeValue = 0
      let oidFlag = (lpData[2] >> 7 & 0x01);
      if (oidFlag == 1) { // oid4 high-coder
        let oid_a = (lpData[8] << 40);
        let oid_b = (lpData[9] << 32);
        oid4CodeValue = (oid_a & 0x3f0000000000) + (oid_b & 0xff00000000) + ((lpData[10] << 24) & 0xff000000) + ((lpData[11] << 16) & 0xf0000) + ((lpData[12] << 8) & 0xff00) + (lpData[13] & 0xff);


      } else if (oidFlag == 0) { // oid3 high-coder
        oid4CodeValue = ((lpData[10] & 0xff) << 24) | (lpData[11] << 16) | (lpData[12] << 8) | (lpData[13]);

      } else {
        //   console.log("The oidFlag state is : " + oidFlag);
      }
      if (oid4CodeValue == 0) {
        return;
      }
      if ((lpData[2] & 0x10) != 0) {
        return;
      }
      emitData({
        cmd: 'getOID4CodeValue',
        data: oid4CodeValue
      })
      break;
    case 0xf0:
      let penColor = lpData.slice(2, lpData.length);
      emitData({
        cmd: 'penColor',
        data: penColor
      })
      break;
      //  读取笔的类型
    case 0xe5:
      // console.log(lpData[2])
      switch (lpData[2]) {
        case 0x00:
          utils.changeDistanceAndAngle(3.3641, 17)
          break
        case 0x01:
          utils.changeDistanceAndAngle(2.9431, 180);
          break;
        case 0x02:
          utils.changeDistanceAndAngle(2.9431, 180);
          break
        case 0x03:
          utils.changeDistanceAndAngle(4.3841, 17);
          break;
        case 0x08:
          event.emit('130', true)
          utils.changeDistanceAndAngle(2.8, 180);
          break;
        case 0x09:
          event.emit('130', true)
          utils.changeDistanceAndAngle(2.8, 180)
          break
        case 0x10:
          event.emit('130', true)
          utils.changeDistanceAndAngle(2.5, 180);
          break
        default:
          break
      }
      break
    case 0xeb:
      var mPen_CurrentCodePointType = "";
      switch (lpData[2]) {
        case 0:
          mPen_CurrentCodePointType = "OID3";
          break;
        case 1:
          mPen_CurrentCodePointType = "OID4";
          break;
        default:
          break;
      }
      emitData({
        cmd: 'getCodePointType',
        data: mPen_CurrentCodePointType
      })
      break;
      // 获取离线数据量
    case 0xc1:
      let offlineDataSize = lpData.slice(2, lpData.length);
      console.log(lpData, 'lpdata')
      let offlineDataNum = parseInt((((offlineDataSize[3] << 24) & 0xff000000) | ((offlineDataSize[2] << 16) & 0xff0000) | ((offlineDataSize[1] << 8) & 0xff00) | (offlineDataSize[0] & 0xff)) / 10);
      emitData({
        cmd: "getOfflineDataNum",
        data: offlineDataNum
      })
      break;
      // 开始获取离线数据
    case 0xc3:
      if (lpData[2] === 0x00) {
        emitData({
          cmd: 'startGetOffline',
          data: true
        })
      } else {
        emitData({
          cmd: "startGetOffline",
          data: false
        })
      }
      break
    case 0xc4:
      doneFlag.gofflineDataProgress = 0
      console.log(doneFlag)
      emitData({
        cmd: 'offLineProgressStop',
        data: lpData[2] === 0x00
      })
      break
    case 0xcc:
      emitData({
        cmd: "offLineProgressPause",
        data: lpData[2] === 0x00
      })
      break
    case 0xcd:
      emitData({
        cmd: 'offLineProgressContinue',
        data: lpData[2] === 0x00
      })
      break
    case 0xc5:
      doneFlag.finishFlag = lpData[2] === 0x00
      // console.log(doneFlag)
      doneFlag.gofflineDataProgress = 0
      // console.log(doneFlag)
      setTimeout(() => {
        emitData({
          cmd: 'offLineProgressFinish',
          data: lpData[2] === 0x00 ? '100%' : false
        })
        event.emit('finish', true)
      }, 1000)
      break
    case 0xc7:
      emitData({
        cmd: 'offLineDataConfirm',
        data: lpData[2] === 0x00
      })
      break
    case 0xc9:
      emitData({
        cmd: 'offLineDataDelete',
        data: lpData[2] === 0x00
      })
      break

  }
}
// byte数组转字符串
const byteToString = (arr) => {
  if (typeof arr === 'string') {
    return arr;
  }
  var str = '',
    _arr = arr;
  for (var i = 0; i < _arr.length; i++) {
    var one = _arr[i].toString(2),
      v = one.match(/^1+?(?=0)/);
    if (v && one.length == 8) {
      var bytesLength = v[0].length;
      var store = _arr[i].toString(2).slice(7 - bytesLength);
      for (var st = 1; st < bytesLength; st++) {
        store += _arr[st + i].toString(2).slice(2);
      }
      str += String.fromCharCode(parseInt(store, 2));
      i += bytesLength - 1;
    } else {
      str += String.fromCharCode(_arr[i]);
    }
  }
  return str;
}
const emitData = (val) => {
  event.emit('penData', val);
}
// 字符串转utf-8
const strToUtf8 = (str) => {
  const utf8 = [];
  for (let ii = 0; ii < str.length; ii++) {
    let charCode = str.charCodeAt(ii);
    if (charCode < 0x80) utf8.push(charCode);
    else if (charCode < 0x800) {
      utf8.push(0xc0 | (charCode >> 6), 0x80 | (charCode & 0x3f));
    } else if (charCode < 0xd800 || charCode >= 0xe000) {
      utf8.push(0xe0 | (charCode >> 12), 0x80 | ((charCode >> 6) & 0x3f), 0x80 | (charCode & 0x3f));
    } else {
      ii++;
      charCode = 0x10000 + (((charCode & 0x3ff) << 10) | (str.charCodeAt(ii) & 0x3ff));
      utf8.push(
        0xf0 | (charCode >> 18),
        0x80 | ((charCode >> 12) & 0x3f),
        0x80 | ((charCode >> 6) & 0x3f),
        0x80 | (charCode & 0x3f),
      );
    }
  }
  //兼容汉字，ASCII码表最大的值为127，大于127的值为特殊字符
  for (let jj = 0; jj < utf8.length; jj++) {
    var code = utf8[jj];
    if (code > 127) {
      utf8[jj] = code - 256;
    }
  }
  return utf8;
}
const MAC = (num) => {
  let num1 = changeData(Math.floor(num / 16));
  let num2 = changeData(num % 16);
  return num1 + num2
}

function changeData(num) {
  let nums = null
  if (num >= 10) {
    switch (num) {
      case 10:
        nums = 'A';
        break;
      case 11:
        nums = 'B'
        break;
      case 12:
        nums = 'C';
        break;
      case 13:
        nums = 'D'
        break
      case 14:
        nums = 'E';
        break
      case 15:
        nums = 'F'
        break
      default:
        break
    }
  } else {
    nums = num + ''
  }
  return nums;
}
class Queue {
  constructor() {
    this.dataStore = []
  }
  enqueue(item) {
    this.dataStore.push(item)
  }

  dequeue() {
    return this.dataStore.shift()
  }
  front() {
    return this.dataStore[0]
  }
  back() {
    return this.dataStore[this.dataStore.length - 1]
  }
  getLength() {
    return this.dataStore.length
  }
  empty() {
    return this.dataStore.length === 0
  }
  toString() {
    let retStr = ''
    this.dataStore.forEach((item) => {
      retStr += item + '\n'
    })
    return retStr
  }
}
// hex字符串转typedArray
const hex2TypeArray = (hex) => {
  return new Uint8Array(hex.match(/[\da-f]{2}/gi).map(function (h) {
    return parseInt(h, 16)
  })).buffer
}
export {
  TTSDK
}