using System.Threading;
using System.Threading.Tasks;

namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Ipc;

/// <summary>
///     Strategy for handling each post-Hello frame the sidecar's <see cref="TcpFrameServer"/>
///     reads. Implementations deserialize the body per the <see cref="MessageKind"/>, dispatch
///     to the historian, and write the corresponding reply through the supplied
///     <see cref="FrameWriter"/>.
/// </summary>
public interface IFrameHandler
{
    /// <summary>Handles a frame from the sidecar frame server.</summary>
    /// <param name="kind">The type of message being handled.</param>
    /// <param name="body">The serialized message body.</param>
    /// <param name="writer">The frame writer to send responses.</param>
    /// <param name="ct">Cancellation token for the operation.</param>
    Task HandleAsync(MessageKind kind, byte[] body, FrameWriter writer, CancellationToken ct);
}