package argon2

import (
	"crypto/rand"
	"encoding/base64"
	"fmt"

	"golang.org/x/crypto/argon2"
)

func Hash(text string) (string, error) {
	salt := make([]byte, saltLength)
	_, err := rand.Read(salt)
	if err != nil {
		return "", err
	}

	hash := argon2.IDKey([]byte(text), salt, iterations, memory, parallelism, keyLength)

	saltB64 := base64.RawStdEncoding.EncodeToString(salt)
	hashB64 := base64.RawStdEncoding.EncodeToString(hash)

	encoded := fmt.Sprintf("$argon2id$v=19$m=%d,t=%d,p=%d$%s$%s", memory, iterations, parallelism, saltB64, hashB64)
	return encoded, nil
}