namespace FurinaImpact.Kcp
{
    /// <summary>
    /// Options for customized keep-alive functionality.
    /// </summary>
    public sealed class KcpKeepAliveOptions
    {
        /// <summary>
        /// Create an instance of option object for customized keep-alive functionality.
        /// </summary>
        /// <param name="sendInterval">The minimum interval in milliseconds between sending keep-alive messages.</param>
        /// <param name="gracePeriod">When no packets are received during this period (in milliseconds), the transport is considered to be closed.</param>
        public KcpKeepAliveOptions(int sendInterval, int gracePeriod)
        {
            if (sendInterval <= 0)
            {
                throw new ArgumentOutOfRangeException(nameof(sendInterval));
            }
            if (gracePeriod <= 0)
            {
                throw new ArgumentOutOfRangeException(nameof(gracePeriod));
            }
            SendInterval = sendInterval;
            GracePeriod = gracePeriod;
        }

        internal int SendInterval { get; }
        internal int GracePeriod { get; }
    }
}