private bool HandleTradingSessionParameters()

in FixAntenna/NetCore/FixEngine/Session/MessageHandler/PerType/LogonMessageHandler.cs [278:346]
64 lines of code
13 McCabe index (conditional complexity)

		private bool HandleTradingSessionParameters(
			FixMessage message, AcceptorFixSession acceptorFixSession,
			long expectedInMsgSeqNum, long expectedOutMsgSeqNum)
		{
			var restoredInSeqNum = (long?) acceptorFixSession.GetAttribute(ExtendedFixSessionAttribute.SequenceWasDecremented.Name);
			var currentInSeqNum = restoredInSeqNum ?? acceptorFixSession.RuntimeState.InSeqNum;
			var currentOutSeqNum = acceptorFixSession.RuntimeState.OutSeqNum;
			var firstSessionConnection = currentInSeqNum == 1 && currentOutSeqNum == 1;

			var config = acceptorFixSession.ConfigAdapter;
			var schedule = new Schedule(config.TradePeriodBegin, config.TradePeriodEnd, config.TradePeriodTimeZone);

			if (schedule.IsTradingPeriodDefined())
			{
				if (IsLastResetOccurredAfterPeriodEnd(acceptorFixSession, schedule))
				{
					var reason = "Illegal state on handle of reset sequence numbers from first logon: last reset is after scheduled end of trading period";
					OnFailedSeqNumResetFromFirstLogon(message, acceptorFixSession, reason, null);
				}
				else if (!IsLastResetOccurredInTradingPeriod(acceptorFixSession, schedule) || firstSessionConnection)
				{
					if (Log.IsTraceEnabled)
					{
						Log.Trace("Trade period is defined for session " + Session.Parameters.SessionId +
							" and needs sequence reset (first connect in this period)");
					}

					return ResetSequencesFromFirstLogon(message, acceptorFixSession, expectedInMsgSeqNum, expectedOutMsgSeqNum);
				}
				else
				{
					if (Log.IsTraceEnabled)
					{
						Log.Trace("No needs reset for session " + Session.Parameters.SessionId +
							" in this trading period (it was done already)");
					}
				}
			}
			else if (schedule.IsOnlyPeriodBeginDefined())
			{
				if (!IsLastResetOccurredAfterPeriodBegin(acceptorFixSession, schedule) || firstSessionConnection)
				{
					if (Log.IsTraceEnabled)
					{
						Log.Trace("Trade period begins for session " + Session.Parameters.SessionId +
							" and needs sequence reset (first connect in this period)");
					}

					return ResetSequencesFromFirstLogon(message, acceptorFixSession, expectedInMsgSeqNum, expectedOutMsgSeqNum);
				}
				else
				{
					if (Log.IsTraceEnabled)
					{
						Log.Trace("Trade period begins for session " + Session.Parameters.SessionId +
							" but reset was done before");
					}
				}
			}
			else
			{
				var reason = "Trading period is not defined for the session with enabled reset sequence from first logon. Session: "
						+ acceptorFixSession.Parameters.SessionId;
				Log.Warn(reason);
				return true;
			}

			return false;
		}