package lib

import (
	"crypto/ed25519"
	"crypto/rand"
	"io/ioutil"
	"os"
	"time"
)

var PrivateKey ed25519.PrivateKey
var PublicKey ed25519.PublicKey
var filePrivateKey string = "/keys/privatekey.pem"
var filePublicKey string = "/keys/publickey.pem"

func InitLoginBiscuit() error {

	if _, err := os.Stat(filePrivateKey); os.IsNotExist(err) {
		rng := rand.Reader
		PublicKey, PrivateKey, _ = ed25519.GenerateKey(rng)
		if err := ioutil.WriteFile(filePrivateKey, PrivateKey, 0600); err != nil {
			return err
		}
		if err := ioutil.WriteFile(filePublicKey, PublicKey, 0600); err != nil {
			return err
		}
	} else {
		var err error = nil
		PrivateKey, err = ioutil.ReadFile(filePrivateKey)
		if err != nil {
			return err
		}
		PublicKey, err = ioutil.ReadFile(filePublicKey)
		if err != nil {
			return err
		}
	}
	return nil
}

func InitGlobalBiscuit() error {
	for {
		time.Sleep(1 * time.Second)
		_, err := os.Stat(filePublicKey)
		if err == nil {
			break
		}
	}
	for {
		time.Sleep(1 * time.Second)
		_, err := os.Stat(filePrivateKey)
		if err == nil {
			break
		}
	}
	var err error = nil
	PrivateKey, err = ioutil.ReadFile(filePrivateKey)
	if err != nil {
		return err
	}
	PublicKey, err = ioutil.ReadFile(filePublicKey)
	if err != nil {
		return err
	}

	return nil
}