/*********************************************************************
 * \file   BehaviourTreeSequence.cs
 * \author Ryan Wang Nian Jing
 * \brief  Based off Kheng Ian's SC_BTSelector.cs
 *         Sequences function like "AND" nodes, having to process every child
 *         successfully to return a success. Returns a failure on the first
 *         child that fails
 *
 * \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 BehaviourTreeSequence : BehaviourTreeNode
  {
    public BehaviourTreeSequence(string name) : base(name) { }
    public BehaviourTreeSequence(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.SUCCESS:
              continue;
            case BehaviourTreeNodeStatus.RUNNING:
              status = BehaviourTreeNodeStatus.RUNNING;
              onExit(BehaviourTreeNodeStatus.RUNNING);
              return status;
            case BehaviourTreeNodeStatus.FAILURE:
              status = BehaviourTreeNodeStatus.FAILURE;
              onExit(BehaviourTreeNodeStatus.FAILURE);
              return status;
          }
        }
        status = BehaviourTreeNodeStatus.SUCCESS;
        onExit(BehaviourTreeNodeStatus.SUCCESS);
        return status;
      }
    }

  }
}