package mqtt

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"os"

	"github.com/go-basic/uuid"
)

type Config struct {
	Broker   string `json:"broker"`
	ClientId string `json:"client_id"`
	Username string `json:"username"`
	Password string `json:"password"`
}

const configPath = "/opt/vasystem/config/mqtt.conf"

var Options Config

func LoadConfig() {
	if !pathExists(configPath) {
		SaveConfig()
	} else {
		file, _ := os.Open(configPath)
		defer file.Close()

		fd := json.NewDecoder(file)

		fd.Decode(&Options)

		fmt.Printf("%v\n", Options)
	}
}

func SaveConfig() {
	Options = Config{
		"127.0.0.1:1883",
		"smart-ai-helmet-manager" + uuid.New(),
		"admin",
		"admin",
	}

	bytes, err := json.Marshal(Options)
	if err == nil {
		ioutil.WriteFile(configPath, bytes, 0744)
	}
}

func pathExists(path string) bool {
	_, err := os.Stat(path)
	if err == nil {
		return true
	}

	fmt.Printf("%v", err.Error())
	return false
}