pub const AlertDescription = enum(u8) {
    pub const Error = error{
        TlsAlertUnexpectedMessage,
        TlsAlertBadRecordMac,
        TlsAlertRecordOverflow,
        TlsAlertHandshakeFailure,
        TlsAlertBadCertificate,
        TlsAlertUnsupportedCertificate,
        TlsAlertCertificateRevoked,
        TlsAlertCertificateExpired,
        TlsAlertCertificateUnknown,
        TlsAlertIllegalParameter,
        TlsAlertUnknownCa,
        TlsAlertAccessDenied,
        TlsAlertDecodeError,
        TlsAlertDecryptError,
        TlsAlertProtocolVersion,
        TlsAlertInsufficientSecurity,
        TlsAlertInternalError,
        TlsAlertInappropriateFallback,
        TlsAlertMissingExtension,
        TlsAlertUnsupportedExtension,
        TlsAlertUnrecognizedName,
        TlsAlertBadCertificateStatusResponse,
        TlsAlertUnknownPskIdentity,
        TlsAlertCertificateRequired,
        TlsAlertNoApplicationProtocol,
        TlsAlertUnknown,
    };

    close_notify = 0,
    unexpected_message = 10,
    bad_record_mac = 20,
    record_overflow = 22,
    handshake_failure = 40,
    bad_certificate = 42,
    unsupported_certificate = 43,
    certificate_revoked = 44,
    certificate_expired = 45,
    certificate_unknown = 46,
    illegal_parameter = 47,
    unknown_ca = 48,
    access_denied = 49,
    decode_error = 50,
    decrypt_error = 51,
    protocol_version = 70,
    insufficient_security = 71,
    internal_error = 80,
    inappropriate_fallback = 86,
    user_canceled = 90,
    missing_extension = 109,
    unsupported_extension = 110,
    unrecognized_name = 112,
    bad_certificate_status_response = 113,
    unknown_psk_identity = 115,
    certificate_required = 116,
    no_application_protocol = 120,
    _,

    pub fn toError(alert: AlertDescription) Error!void {
        switch (alert) {
            .close_notify => {}, // not an error
            .unexpected_message => return error.TlsAlertUnexpectedMessage,
            .bad_record_mac => return error.TlsAlertBadRecordMac,
            .record_overflow => return error.TlsAlertRecordOverflow,
            .handshake_failure => return error.TlsAlertHandshakeFailure,
            .bad_certificate => return error.TlsAlertBadCertificate,
            .unsupported_certificate => return error.TlsAlertUnsupportedCertificate,
            .certificate_revoked => return error.TlsAlertCertificateRevoked,
            .certificate_expired => return error.TlsAlertCertificateExpired,
            .certificate_unknown => return error.TlsAlertCertificateUnknown,
            .illegal_parameter => return error.TlsAlertIllegalParameter,
            .unknown_ca => return error.TlsAlertUnknownCa,
            .access_denied => return error.TlsAlertAccessDenied,
            .decode_error => return error.TlsAlertDecodeError,
            .decrypt_error => return error.TlsAlertDecryptError,
            .protocol_version => return error.TlsAlertProtocolVersion,
            .insufficient_security => return error.TlsAlertInsufficientSecurity,
            .internal_error => return error.TlsAlertInternalError,
            .inappropriate_fallback => return error.TlsAlertInappropriateFallback,
            .user_canceled => {}, // not an error
            .missing_extension => return error.TlsAlertMissingExtension,
            .unsupported_extension => return error.TlsAlertUnsupportedExtension,
            .unrecognized_name => return error.TlsAlertUnrecognizedName,
            .bad_certificate_status_response => return error.TlsAlertBadCertificateStatusResponse,
            .unknown_psk_identity => return error.TlsAlertUnknownPskIdentity,
            .certificate_required => return error.TlsAlertCertificateRequired,
            .no_application_protocol => return error.TlsAlertNoApplicationProtocol,
            _ => return error.TlsAlertUnknown,
        }
    }
}