namespace Renci.SshNet.Messages.Connection
{
    /// <summary>
    /// Represents SSH_MSG_CHANNEL_SUCCESS message.
    /// </summary>
    public class ChannelWindowAdjustMessage : ChannelMessage
    {
        /// <inheritdoc />
        public override string MessageName
        {
            get
            {
                return "SSH_MSG_CHANNEL_WINDOW_ADJUST";
            }
        }

        /// <inheritdoc />
        public override byte MessageNumber
        {
            get
            {
                return 93;
            }
        }

        /// <summary>
        /// Gets number of bytes to add to the window.
        /// </summary>
        public uint BytesToAdd { get; private set; }

        /// <summary>
        /// Gets the size of the message in bytes.
        /// </summary>
        /// <value>
        /// The size of the messages in bytes.
        /// </value>
        protected override int BufferCapacity
        {
            get
            {
                var capacity = base.BufferCapacity;
                capacity += 4; // BytesToAdd
                return capacity;
            }
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="ChannelWindowAdjustMessage"/> class.
        /// </summary>
        public ChannelWindowAdjustMessage()
        {
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="ChannelWindowAdjustMessage"/> class.
        /// </summary>
        /// <param name="localChannelNumber">The local channel number.</param>
        /// <param name="bytesToAdd">The bytes to add.</param>
        public ChannelWindowAdjustMessage(uint localChannelNumber, uint bytesToAdd)
            : base(localChannelNumber)
        {
            BytesToAdd = bytesToAdd;
        }

        /// <summary>
        /// Called when type specific data need to be loaded.
        /// </summary>
        protected override void LoadData()
        {
            base.LoadData();

            BytesToAdd = ReadUInt32();
        }

        /// <summary>
        /// Called when type specific data need to be saved.
        /// </summary>
        protected override void SaveData()
        {
            base.SaveData();

            Write(BytesToAdd);
        }

        internal override void Process(Session session)
        {
            session.OnChannelWindowAdjustReceived(this);
        }
    }
}
