using MxGateway.Contracts;

namespace MxGateway.Server.Workers;

public sealed class WorkerFrameProtocolOptions
{
    public const int DefaultMaxMessageBytes = 16 * 1024 * 1024;

    public WorkerFrameProtocolOptions(string sessionId)
        : this(
            sessionId,
            GatewayContractInfo.WorkerProtocolVersion,
            DefaultMaxMessageBytes)
    {
    }

    public WorkerFrameProtocolOptions(
        string sessionId,
        uint protocolVersion,
        int maxMessageBytes)
    {
        if (string.IsNullOrWhiteSpace(sessionId))
        {
            throw new WorkerFrameProtocolException(
                WorkerFrameProtocolErrorCode.InvalidConfiguration,
                "Worker frame protocol requires a session id.");
        }

        if (protocolVersion == 0)
        {
            throw new WorkerFrameProtocolException(
                WorkerFrameProtocolErrorCode.InvalidConfiguration,
                "Worker frame protocol requires a non-zero protocol version.");
        }

        if (maxMessageBytes <= 0)
        {
            throw new WorkerFrameProtocolException(
                WorkerFrameProtocolErrorCode.InvalidConfiguration,
                "Worker frame protocol max message size must be greater than zero.");
        }

        SessionId = sessionId;
        ProtocolVersion = protocolVersion;
        MaxMessageBytes = maxMessageBytes;
    }

    public string SessionId { get; }

    public uint ProtocolVersion { get; }

    public int MaxMessageBytes { get; }
}