/*********************************************************************
 * \file   BehaviourTreeSelector.cs
 * \author Ryan Wang Nian Jing
 * \brief  Based off Kheng Ian's SC_BTSelector.cs
 *         Selectors function like "OR" nodes, returning success on the
 *         first successful child and stopping operation
 *
 * \copyright Copyright (c) 2022 DigiPen Institute of Technology. Reproduction
   or disclosure of this file or its contents without the prior written
   consent of DigiPen Institute of Technology is prohibited.
 *********************************************************************/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SHADE_Scripting.AIBehaviour.BehaviourTree
{
  public class BehaviourTreeSelector : BehaviourTreeNode
  {
    public BehaviourTreeSelector(string name) : base(name) { }
    public BehaviourTreeSelector(string name, List<BehaviourTreeNode> children) :
      base(name, children)
    { }

    public override BehaviourTreeNodeStatus Evaluate()
    {
      onEnter(BehaviourTreeNodeStatus.RUNNING);
      for (int i = 0; i < children.Count; ++i)
      {
        switch (children[i].Evaluate())
        {
          case BehaviourTreeNodeStatus.RUNNING:
            status = BehaviourTreeNodeStatus.RUNNING;
            onExit(BehaviourTreeNodeStatus.RUNNING);
            return status;
          case BehaviourTreeNodeStatus.SUCCESS:
            status = BehaviourTreeNodeStatus.SUCCESS;
            onExit(BehaviourTreeNodeStatus.SUCCESS);
            return status;
          case BehaviourTreeNodeStatus.FAILURE:
            continue;
        }
      }
      status = BehaviourTreeNodeStatus.FAILURE;
      onExit(BehaviourTreeNodeStatus.FAILURE);
      return status;
    }
  }
}