package device

import (
	"encoding/json"
	"goAdapter/setting"
	"log"
	"os"
	"path/filepath"
	"strconv"
	"time"

	"github.com/tarm/serial"
)

type SerialInterfaceParam struct {
	Name     string `json:"Name"`
	BaudRate string `json:"BaudRate"`
	DataBits string `json:"DataBits"` //数据位: 5, 6, 7 or 8 (default 8)
	StopBits string `json:"StopBits"` //停止位: 1 or 2 (default 1)
	Parity   string `json:"Parity"`   //校验: N - None, E - Even, O - Odd (default E),(The use of no parity requires 2 stop bits.)
	Timeout  string `json:"Timeout"`  //通信超时
	Interval string `json:"Interval"` //通信间隔
}

type CommunicationSerialTemplate struct {
	Name  string               `json:"Name"`  //接口名称
	Type  string               `json:"Type"`  //接口类型,比如serial,tcp,udp,http
	Param SerialInterfaceParam `json:"Param"` //接口参数
	Port  *serial.Port         `json:"-"`     //通信句柄
}

var CommunicationSerialMap = make([]*CommunicationSerialTemplate, 0)

func (c *CommunicationSerialTemplate) Open() bool {

	serialParam := c.Param
	serialBaud, _ := strconv.Atoi(serialParam.BaudRate)

	var serialParity serial.Parity
	switch serialParam.Parity {
	case "N":
		serialParity = serial.ParityNone
	case "O":
		serialParity = serial.ParityOdd
	case "E":
		serialParity = serial.ParityEven
	}

	var serialStop serial.StopBits
	switch serialParam.StopBits {
	case "1":
		serialStop = serial.Stop1
	case "1.5":
		serialStop = serial.Stop1Half
	case "2":
		serialStop = serial.Stop2
	}

	serialConfig := &serial.Config{
		Name:        serialParam.Name,
		Baud:        serialBaud,
		Parity:      serialParity,
		StopBits:    serialStop,
		ReadTimeout: time.Millisecond * 1,
	}

	var err error
	c.Port, err = serial.OpenPort(serialConfig)
	if err != nil {
		setting.Logger.Errorf("open serial err %v", err)
		return false
	} else {
		setting.Logger.Debugf("open serial %s ok", c.Param.Name)
	}

	return true
}

func (c *CommunicationSerialTemplate) Close() bool {

	return true
}

func (c *CommunicationSerialTemplate) WriteData(data []byte) int {

	//log.Printf("len is %d\n",len(data))
	//log.Printf("c %+v\n",c)

	if c.Port == nil {
		setting.Logger.Errorf("serial writeData err")
		return 0
	}

	cnt, err := c.Port.Write(data)
	if err != nil {
		log.Println(err)
	}

	return cnt
}

func (c *CommunicationSerialTemplate) ReadData(data []byte) int {

	if c.Port == nil {
		return 0
	}

	cnt, _ := c.Port.Read(data)

	return cnt
}

func (c *CommunicationSerialTemplate) GetName() string {
	return c.Name
}

func (c *CommunicationSerialTemplate) GetTimeOut() string {
	return c.Param.Timeout
}

func (c *CommunicationSerialTemplate) GetInterval() string {
	return c.Param.Interval
}

//func NewCommunicationSerialTemplate(commName, commType string, param SerialInterfaceParam) *CommunicationSerialTemplate {
//
//	return &CommunicationSerialTemplate{
//		Param: param,
//		CommunicationTemplate: CommunicationTemplate{
//			Name: commName,
//			Type: commType,
//		},
//	}
//}

func ReadCommSerialInterfaceListFromJson() bool {

	exeCurDir, _ := filepath.Abs(filepath.Dir(os.Args[0]))
	fileDir := exeCurDir + "/selfpara/commSerialInterface.json"

	if fileExist(fileDir) == true {
		fp, err := os.OpenFile(fileDir, os.O_RDONLY, 0777)
		if err != nil {
			log.Println("open commSerialInterface.json err", err)
			return false
		}
		defer fp.Close()

		data := make([]byte, 20480)
		dataCnt, err := fp.Read(data)

		err = json.Unmarshal(data[:dataCnt], &CommunicationSerialMap)
		if err != nil {
			log.Println("commSerialInterface unmarshal err", err)
			return false
		}
		return true
	} else {
		log.Println("commSerialInterface.json is not exist")

		return false
	}
}

func WriteCommSerialInterfaceListToJson() {

	exeCurDir, _ := filepath.Abs(filepath.Dir(os.Args[0]))

	fileDir := exeCurDir + "/selfpara/commSerialInterface.json"

	fp, err := os.OpenFile(fileDir, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0777)
	if err != nil {
		log.Println("open commSerialInterface.json err", err)
		return
	}
	defer fp.Close()

	sJson, _ := json.Marshal(CommunicationSerialMap)

	_, err = fp.Write(sJson)
	if err != nil {
		log.Println("write commSerialInterface.json err", err)
	}
	log.Println("write commSerialInterface.json sucess")
}