public Tuple<Activity, Behaviour> CollectWood(WorldView state)
{
if (state.Location != home && state.CanCollect<Wood>() > 0)
{
lastWoodSource = state.Location;
return Do.Collect<Wood>().Then(ReturnHome);
}
if (state.CanHarvest<Wood>() > 0)
{
return Do.Harvest<Wood>().Then(CollectWood);
}
if (lastWoodSource != null && lastWoodSource != state.Location)
{
return Move.Towards(lastWoodSource).Then(CollectWood);
}
lastWoodSource = null;
return FindWood(state);
}