using System;
using System.Security.Cryptography;
using System.Text;

using TextSender_API.Models;

namespace TextSender_API.Controllers;

public class PasswordVerification
{
    #region Fiends
    private int _keySize = 64;
    private int _iterations = 350000;
    #endregion

    #region Constructors
    #endregion

    #region Methods
    public Salt CreateSalt(User user)
    {
        var salt = new Salt();
        salt.Key = RandomNumberGenerator.GetBytes(this._keySize);

        return salt;
    }

    public string HashPassword(User user, Salt salt)
    {
        var hashAlgorithm = HashAlgorithmName.SHA512;

        var hash = Rfc2898DeriveBytes.Pbkdf2(
            Encoding.UTF8.GetBytes(user.Password!),
            salt.Key!,
            this._iterations,
            hashAlgorithm,
            this._keySize);

        return Convert.ToHexString(hash);
    }
    #endregion
}