Program.cs


public class ActionDamage : ActionNode
{
    private IPlayer _player;
    private int _damage;

    public ActionDamage(int damage) : base(null)
    {
        _damage = damage;
    }

    public override NodeStatus Execute()
    {
        if (_player == null)
        {
            var player = BehaviorTree?.Blackboard.GetValue<IPlayer>("Player");
            if (player == null) throw new Exception("Player not found in blackboard.");
            _player = player;
        }
        _player.Health -= _damage;
        Console.WriteLine($"Player damaged for {_damage}. Remaining health: {_player.Health}");
        return _player.Health <= 0 ? NodeStatus.Failure : NodeStatus.Success;
    }
}

public class PlayerConditionNode : ConditionNode
{
    private IPlayer _player;
    private Func<IPlayer, bool> _playerCondition;

    public PlayerConditionNode(Func<IPlayer, bool> playerCondition) : base(null)
    {
        _playerCondition = playerCondition;
    }

    public override NodeStatus Execute()
    {
        if (_player == null)
        {
            var player = BehaviorTree?.Blackboard.GetValue<IPlayer>("Player");
            if (player == null) throw new Exception("Player not found in blackboard.");
            _player = player;
        }

        bool result = _playerCondition(_player);
        return result ? NodeStatus.Success : NodeStatus.Failure;
    }
}
public class Program
{
    public static void Main(string[] args)
    {
        BehaviorTree _behaviorTree = new BehaviorTree(
            new SelectorNode(new List<Node>
            {
                    new SequenceNode(new List<Node>
                    {
                        new PlayerConditionNode(player => player.Health > 50),
                        new ActionDamage(20),
                    }),
                    new SequenceNode(new List<Node>
                    {
                        new ActionNode(() => {
                            Console.WriteLine("Not harming player, health is low.");
                            return NodeStatus.Success;
                        })
                    }),
            })
        );

        _behaviorTree.Blackboard.SetValue<IPlayer>("Player", new DummyPLayer(100));
        var steps = 5;
        for (int i = 0; i < steps; i++)
        {
            _behaviorTree.Tick();
        }
    }
}