package flow

import (
	"encoding/binary"
	"fmt"
	"log"
)

// Sensor 传感器
type Sensor struct {
	SP01 uint16 // 清洗罐气压传感器 SP-01 罐体排空,值≤0.5(暂定)
	SP02 uint16 // 清洗液水箱水位传感器 SP-02 模拟量传感器
	LT01 uint16 // 清洗罐满水位传感器 (非接触式水位传感器) LT-01 模拟量传感器
	LT02 uint16 // 清洗罐排水传感器 (非接触式水位传感器) LT-02 模拟量传感器
	LT03 uint8  // 清洗液水箱满水位传感器 (浮子式水位传感器) LT-03 值为1,清洗液水箱满水位
}

func (sensor *Sensor) String() string {
	return fmt.Sprintf("SP01=%d SP02=%d LT01=%d LT02=%d LT03=%d", sensor.SP01, sensor.SP02, sensor.LT01, sensor.LT02, sensor.LT03)
}

func NewSensor(buf []byte) *Sensor {

	if len(buf) == 14 {

		if buf[0] == byte(0xaa) && buf[1] == byte(0x55) {

			sensor := &Sensor{}

			sensor.SP01 = binary.BigEndian.Uint16(buf[2:4])
			sensor.SP02 = binary.BigEndian.Uint16(buf[4:6])
			sensor.LT01 = binary.BigEndian.Uint16(buf[6:8])
			sensor.LT02 = binary.BigEndian.Uint16(buf[8:10])
			sensor.LT03 = uint8(buf[10])

			return sensor
		}

	}

	log.Println(buf, "非标准传感器字节流")

	return nil
}

// BytesFromSensor 生成Buf从Sensor
func BytesFromSensor(sensor *Sensor) []byte {
	buf := make([]byte, 14)
	buf[0] = byte(0xaa)
	buf[1] = byte(0x55)

	binary.BigEndian.PutUint16(buf[2:4], sensor.SP01)
	binary.BigEndian.PutUint16(buf[4:6], sensor.SP02)
	binary.BigEndian.PutUint16(buf[6:8], sensor.LT01)
	binary.BigEndian.PutUint16(buf[8:10], sensor.LT02)
	buf[10] = sensor.LT03

	for _, b := range buf[0:13] {
		buf[13] += b
	}

	return buf
}