package common

import (
	"fmt"
	"strconv"
	"strings"
)

type Device int

const (
	Unknown Device = iota
	TRex
	HMI
	Mobile
	Service
)

// Key returns formatting for websockets, kafka, redis given an ID
//  ex: TRex.Key("FISKER123") returns "1:FISKER123"
func (d Device) Key(id string) string {
	return fmt.Sprintf("%d:%s", d, id)
}

func (d Device) String() string {
	return [...]string{"unknown", "trex", "hmi", "mobile", "service"}[d]
}

func (d Device) EnumIndex() int {
	return int(d)
}

// ParseDeviceKey is a generic parser for keys from websockets, kafka, redis
// If unable to parse string correctly, will return device type Unknown
//  ex: "1:FISKER123" returns (TRex, "FISKER123")
//  ex: "-1:FISKER123" returns (Unknown, "FISKER123")
//  ex: "FISKER123" returns (Unknown, "FISKER123")
func ParseDeviceKey(key string) (Device, string) {
	keys := strings.Split(key, ":")

	if len(keys) == 1 {
		return Unknown, keys[0]
	} else if len(keys) != 2 {
		return Unknown, ""
	}

	i, err := strconv.Atoi(keys[0])
	if err != nil {
		return Unknown, keys[1]
	}

	return Device(i), keys[1]
}