using System;
using UnityEngine;

public abstract class GuardedValueNodeBehavior : NodeBehavior
{
	private bool evaluating;

	protected virtual void Start()
	{
		RecomputeIfAuthoritative();
	}

	public override void OnInputValueChanged(string inputPortName, BSValue value)
	{
		RecomputeIfAuthoritative();
	}

	protected void RecomputeIfAuthoritative()
	{
		if (!base.IsAuthoritative || Node == null)
		{
			return;
		}
		if (evaluating)
		{
			HandleEvaluationLoop();
			return;
		}
		evaluating = true;
		try
		{
			RecomputeCore();
		}
		catch (Exception exception)
		{
			Debug.LogException(exception, this);
			HandleEvaluationLoop();
		}
		finally
		{
			evaluating = false;
		}
	}

	protected abstract void RecomputeCore();

	protected virtual void HandleEvaluationLoop()
	{
		ClearAllValueOutputs();
	}

	protected void ClearAllValueOutputs()
	{
		if (Node == null)
		{
			return;
		}
		for (int i = 0; i < Node.OutputPorts.Count; i++)
		{
			NodePort nodePort = Node.OutputPorts[i];
			if (nodePort != null && nodePort.Kind == PortKind.Value)
			{
				SetOutputValueIfChanged(nodePort.Name, BSValue.None);
			}
		}
	}
}