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

namespace BaseGames.Enemies.AI
{
    /// <summary>
    /// 条件：目标坐标从当前位置是否可到达（调用 NavAgent.CanReach，无法寻路时 Failure）。
    /// 用于 Boss 阶段切换或小怪决策能否追击到跨平台目标。
    /// </summary>
    [TaskName("Can Reach Target?")]
    [TaskCategory("BaseGames/Enemy/Perception")]
    [TaskDescription("检查 NavAgent 是否可以规划到目标的有效路径")]
    public sealed class BD_CanReachTarget : Conditional
    {
        [Tooltip("检查目标（留空则使用玩家位置）")]
        [SerializeField] private Transform m_Target;

        private EnemyBase _enemy;

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

        public override TaskStatus OnUpdate()
        {
            if (_enemy?.Nav == null) return TaskStatus.Failure;
            Vector2 pos = m_Target != null
                ? (Vector2)m_Target.position
                : _enemy.PlayerTransform != null ? (Vector2)_enemy.PlayerTransform.position : Vector2.zero;
            return _enemy.Nav.CanReach(pos) ? TaskStatus.Success : TaskStatus.Failure;
        }
    }
}
#endif