function initManager(param, callback) {
  ble.initManager(param, function (ret) {
    if (ret.state == "poweredOn") {
      console.log("初始化成功");
      callback(true)
    } else {
      callback(false)
    }
  })
}

function scan(param, callback) {
  ble.scan(param, function (ret) {
    if (ret.status) {
      console.log('正在扫描');
    } else {
      console.log('扫描失败');
    }
    callback(ret.status)
  });
}

function getPeripheral(callback) {
  ble.getPeripheral(function (ret) {
    // console.log(JSON.stringify(ret));
    var res = {};
    if (ret.peripherals.length > 0) {
      ret.peripherals.forEach(p => {
        if (p.name) {
          console.log(p.name)
        }
        if (p.name && p.name.startsWith("BLUE2USART")) {
          // console.log(p.name)
          // console.log(p.uuid)
          res = p
          callback(res)
        }
      })
    } else {
      callback(res)
    }
  })
}

function connect(param, callback) {
  ble.connect(param, function (ret, err) {
    if (ret.status) {
      console.log("连接成功！");
    } else {
      console.log("连接失败！");
    }
    callback(ret.status)
  })
}

function disconnect(param, callback) {
  ble.disconnect(param, function (ret, err) {
    if (ret.status) {
      console.log("断开连接成功！");
    } else {
      console.log("断开连接失败！");
    }
    callback(ret)
  });
}

function discoverService(param, callback) {
  ble.discoverService(param, function (ret) {
    var res = '';
    if (ret.services.length > 0) {
      console.log("发现服务成功！");
      ret.services.forEach(s => {
        if (s.startsWith("0000ffe")) {
          callback(s)
        }
      })
    } else {
      console.log("发现服务失败！");
      callback(res)
    }
  })
}

function discoverCharacteristics(param, callback) {
  ble.discoverCharacteristics(param, function (ret) {
    var res = '';
    if (ret.characteristics.length > 0) {
      console.log("发现特征成功！");
      ret.characteristics.forEach(s => {
        if (s.serviceUUID === param.serviceUUID) {
          callback(s.uuid)
        }
      })
    } else {
      console.log("发现特征失败！");
      callback(res)
    }
  })
}

function setNotify(param, callback) {
  ble.setNotify(param, function (ret) {
    // console.log(JSON.stringify(ret))
    var value = ret.characteristic.value;
    if (ret && value.startsWith('ff01')) {
      var wei = value.substr(14, 12);
      wei = Math.round(Number(hex2a(wei)))
    }
    callback(wei)
  })
}

function writeValueForCharacteristic(param) {
  ble.writeValueForCharacteristic(param, function (ret) {
    // console.log(JSON.stringify(ret));
    if (ret.status) {
      // console.log("发送成功");
    } else {
      console.log("发送失败");
    }
  });
}

function getMess(param,callback) {
      var param1 = {
        SF: "AA A5 ",
        LEN: '1A 00 ',
        DES: 'FF FF ',
        SRC: '12 34 ',
        TID: 'B0 A1 ',
        CMD1: '38 02 ',
        X: '00 00 ',
        Y: '00 00 ',
        WIDTH: '40 00 ',
        HEIGHT: '20 00 ',
        FORMAT: '00 00 01 00 ',
        CNT: '04 00 ',
        CRC: '00 00 ',
        EF: '5A 55  ',
        msg: ''
      }
      var newmsg = feedName
      var msglen = newmsg.getByteLen();
      var ttr = ''
      if (Number(_planSum - _feedNum) >= 0) {
        ttr = '少'
        echartsType = '少'
      } else {
        ttr = '多'
        echartsType = '多'
      }
      if (msglen < 8) {
        for (var i = 0; i < 8 - msglen; i++) {
          newmsg = newmsg + ' '
        }
        newmsg = newmsg + ttr
      } else {
        newmsg = feedName + ttr
      }
      // param1.msg = newmsg + Math.abs(Number(_planSum - _feedNum)).toFixed(0) + 'kg'
      param1.msg = newmsg + Math.abs(Number(param.value)).toFixed(0) + 'kg'
      // console.log(param1.msg)
      zfk.getMsg(param1, function (ret, err) {
        var str = ret.sendMsg;
        str = str.replace(/\s+/g, "")
        const num = str.length / 2;
        param.value = "FF0500" + num.toString(16) + str;
        writeValueForCharacteristic(param,function (ret) {
          callback(ret)
        })
      })
}