package medtronic

import (

"fmt"

)

// Voltage represents the battery voltage in milliVolts.

type Voltage int

func (r Voltage) String() string {

return fmt.Sprintf("%g", float64(r)/1000)

}

// BatteryInfo represents the pump's battery voltage and low-battery state.

type BatteryInfo struct {

Voltage Voltage

LowBattery bool

}

func decodeBatteryInfo(data []byte) BatteryInfo {

return BatteryInfo{

LowBattery: data[1] != 0,

Voltage: Voltage(twoByteInt(data[2:4]) * 10),

}

}

// Battery returns the pump's battery information.

func (pump *Pump) Battery() BatteryInfo {

data := pump.Execute(battery)

if pump.Error() != nil {

return BatteryInfo{}

}

if len(data) < 4 || data[0] != 3 {

pump.BadResponse(battery, data)

return BatteryInfo{}

}

return decodeBatteryInfo(data)

}