using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using XNode;
using RPGCreationKit.BehaviourTree;
using RPGCreationKit.AI;

namespace RPGCreationKit.BehaviourTree
{
    /// <summary>
    /// Changes the Steering Behaviour of this AI
    /// </summary>
    [CreateNodeMenu("RPGCK_BehaviourTree/Actions/AI/Change Steering Behaviour", order = 1)]
    [System.Serializable]
    public class AI_ChangeSteeringBehaviour : BTNode
    {
        RckAI thisAI;
        public SteeringBehaviours behaviour;

        // Use this for initialization
        protected override void Init()
        {
            base.Init();
        }

        // Return the correct value of an output port when requested
        public override object GetValue(NodePort port)
        {
            return null; // Replace this
        }

        public override NodeState Execute()
        {
            if (m_NodeState == NodeState.Success || m_NodeState == NodeState.Failure)
                if (hasEvaluated == true)
                    return m_NodeState;

            if (!STARTED)
                OnStart();

            thisAI.selectedSteeringBehaviour = behaviour;

            m_NodeState = NodeState.Success;
            hasEvaluated = true;
            return m_NodeState;
        }


        public override void OnRemoveConnection(NodePort port)
        {
            base.OnRemoveConnection(port);
            indexInSequence = -1;
        }

        public override void OnStart()
        {
            thisAI = (this.graph as RPGCK_BT).ai;
            STARTED = true;
        }

        public override void ReEvaluate()
        {
            if (m_NodeState != NodeState.Running)
                base.ReEvaluate();
        }
    }
}