namespace GermanApp.Domain.Entities;

/// <summary>
/// Represents a refresh token for JWT authentication.
/// </summary>
public class RefreshToken
{
    public int Id { get; internal set; }
    public int UserId { get; internal set; }
    public string Token { get; internal set; } = string.Empty;
    public DateTime ExpiresAt { get; internal set; }
    public bool IsActive { get; internal set; } = true;
    public DateTime CreatedAt { get; internal set; }
    public DateTime? RevokedAt { get; internal set; }

    /// <summary>
    /// Constructor for EF Core deserialization.
    /// </summary>
    private RefreshToken() { }

    /// <summary>
    /// Factory method to create a new refresh token.
    /// </summary>
    public static RefreshToken Create(int userId, string token, int expireDays = 7)
    {
        return new RefreshToken
        {
            UserId = userId,
            Token = token,
            ExpiresAt = DateTime.UtcNow.AddDays(expireDays),
            CreatedAt = DateTime.UtcNow
        };
    }

    /// <summary>
    /// Revokes the refresh token.
    /// </summary>
    public void Revoke()
    {
        IsActive = false;
        RevokedAt = DateTime.UtcNow;
    }

    /// <summary>
    /// Checks if the token is expired.
    /// </summary>
    public bool IsExpired() => DateTime.UtcNow >= ExpiresAt;

    /// <summary>
    /// Checks if the token is valid (not revoked and not expired).
    /// </summary>
    public bool IsValid() => IsActive && !IsExpired();
}