using System.Collections.Generic;
using UnityEngine;

public enum NodeState
{
    Success, Failure, Running
}

public abstract class Node
{
    protected NodeState state;
    public NodeState State => state;
    public abstract NodeState Evaluate();
}

public class Selector : Node
{
    protected List<Node> nodes = new List<Node>(); // children nodes
    
    public Selector(List<Node> nodes)
    {
        this.nodes = nodes;
    }
    
    public override NodeState Evaluate()
    {
        foreach (var node in nodes)
        {
            switch (node.Evaluate())
            {
                case NodeState.Failure:
                    continue;
                case NodeState.Success:
                    state = NodeState.Success;
                    return state;
                case NodeState.Running:
                    state = NodeState.Running;
                    return state;
            }
        }
        state = NodeState.Failure;
        return state;
    }
}