#if GRAPH_DESIGNER
using UnityEngine;
using Opsive.BehaviorDesigner.Runtime.Tasks;
using Opsive.BehaviorDesigner.Runtime.Tasks.Actions;
using BaseGames.Enemies;

namespace BaseGames.Enemies.AI
{
    /// <summary>
    /// 动作：移动到目标并等待 OnGoalReached 事件（事件驱动，替代轮询版 BD_MoveTo）。
    /// OnGoalReached 触发后返回 Success；路径失败返回 Failure。
    /// </summary>
    [TaskName("Move To And Wait")]
    [TaskCategory("BaseGames/Enemy/Movement")]
    [TaskDescription("导航到目标点，到达后原地等待指定时长，然后返回 Success")]
    public sealed class BD_MoveToAndWait : Action
    {
        [SerializeField] private Transform m_Target;

        private EnemyBase _enemy;
        private bool      _reached;
        private bool      _failed;

        public override void OnAwake() => _enemy = gameObject.GetComponent<EnemyBase>();

        public override void OnStart()
        {
            _reached = _failed = false;
            if (_enemy?.Nav == null) { _failed = true; return; }
            _enemy.Nav.OnGoalReached    += HandleReached;
            _enemy.Nav.OnNavPathFailed  += HandleFailed;
            var pos = m_Target != null ? (Vector2)m_Target.position
                     : _enemy.PlayerTransform != null ? (Vector2)_enemy.PlayerTransform.position
                     : (Vector2)transform.position;
            _enemy.Nav.RequestMoveTo(pos);
        }

        public override TaskStatus OnUpdate()
        {
            if (_failed)  return TaskStatus.Failure;
            if (_reached) return TaskStatus.Success;
            return TaskStatus.Running;
        }

        public override void OnEnd()
        {
            if (_enemy?.Nav != null)
            {
                _enemy.Nav.OnGoalReached   -= HandleReached;
                _enemy.Nav.OnNavPathFailed -= HandleFailed;
            }
        }

        private void HandleReached() => _reached = true;
        private void HandleFailed()  => _failed  = true;
    }
}
#endif