package bcrypt

import (
	"fmt"

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

// Verifier verifys passwords using Bcrypt.
type Verifier struct{}

// Verify verifys a Password.
func (bv *Verifier) Verify(password string, hashOnDB string) error {
	err := bcrypt.CompareHashAndPassword([]byte(hashOnDB), []byte(password))
	if err != nil {
		return fmt.Errorf("verify password: %w", err)
	}

	return nil
}

// Hash calculates a hash to be stored on the database.
func (bv *Verifier) Hash(password string) (string, error) {
	hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
	if err != nil {
		return "", fmt.Errorf("hash password: %w", err)
	}

	return string(hash[:]), nil
}