package argon2

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

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

// Hash
func (algorithm Algorithm) Hash(data []byte) (string, error) {
	// Generate Salt
	salt := make([]byte, algorithm.saltLen)
	_, err := rand.Read(salt)
	// Handle Error
	if err != nil {
		return "", err
	}
	// Return Hash
	return fmt.Sprintf("$argon2id$v=%d$m=%d,t=%d,p=%d$%s$%s", argon2.Version, algorithm.memory, algorithm.time, algorithm.threads, base64.RawStdEncoding.EncodeToString(salt), base64.RawStdEncoding.EncodeToString(argon2.IDKey(data, salt, algorithm.time, algorithm.memory, algorithm.threads, algorithm.keyLen))), err
}