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

namespace BaseGames.Enemies.AI
{
    /// <summary>
    /// BD Action：敌人巡逻行为。
    /// 持续令敌人向当前朝向移动，遇墙/边缘时自动转向。
    /// </summary>
    public class BD_Patrol : Action
    {
        [Tooltip("检测地面边缘的向下射线长度")]
        public float edgeCheckLength = 1.2f;
        [Tooltip("检测障碍物的水平射线长度")]
        public float wallCheckLength = 0.4f;
        [Tooltip("地面/墙壁 LayerMask")]
        public LayerMask groundLayer;

        private EnemyBase _enemy;
        private float     _dir = 1f;

        public override void OnStart()
        {
            _enemy = GetComponent<EnemyBase>();
        }

        public override TaskStatus OnUpdate()
        {
            if (_enemy == null) return TaskStatus.Failure;

            if (ShouldFlip())
                _dir = -_dir;

            _enemy.MoveInDirection(_dir);
            return TaskStatus.Running;
        }

        public override void OnEnd()
        {
            _enemy?.StopMovement();
        }

        private bool ShouldFlip()
        {
            Transform t = _enemy.transform;
            Vector2 pos = t.position;

            // 前方边缘检测：在脚前方向下射线，若无地面则转向
            Vector2 edgeOrigin = pos + Vector2.right * (_dir * 0.3f) + Vector2.down * 0.1f;
            bool hasGround = Physics2D.Raycast(edgeOrigin, Vector2.down, edgeCheckLength, groundLayer);
            if (!hasGround) return true;

            // 前方障碍检测：水平射线，若撞墙则转向
            bool hitWall = Physics2D.Raycast(pos, Vector2.right * _dir, wallCheckLength, groundLayer);
            if (hitWall) return true;

            return false;
        }
    }
}
#endif