using UnityEngine;

namespace BaseGames.World
{
    /// <summary>
    /// 幻象板（Phantom Plate）：玩家可从下方穿过，从上方站立的单向平台。
    /// 使用 PlatformEffector2D + Collider2D 实现；支持下蹲跌落（按下 + 跳跃）。
    ///
    /// 挂载要求：同一 GameObject 上需有 Collider2D 和 PlatformEffector2D。
    /// </summary>
    [RequireComponent(typeof(Collider2D))]
    [RequireComponent(typeof(PlatformEffector2D))]
    public class PhantomPlate : MonoBehaviour
    {
        [Header("下蹲跌落")]
        [Tooltip("按住下方向 + 跳跃时临时禁用碰撞器，允许玩家向下穿过平台")]
        [SerializeField] private bool _allowDropThrough = true;

        [Tooltip("禁用碰撞器的持续时间（秒）")]
        [SerializeField] private float _dropDisableDuration = 0.3f;

        private Collider2D     _col;
        private PlatformEffector2D _effector;
        private float          _reEnableTimer;
        private bool           _isDisabled;

        private void Awake()
        {
            _col      = GetComponent<Collider2D>();
            _effector = GetComponent<PlatformEffector2D>();

            // 确保 PlatformEffector2D 配置为单向平台
            _effector.useOneWay         = true;
            _effector.surfaceArc        = 170f;
            _col.usedByEffector         = true;
        }

        private void Update()
        {
            if (!_isDisabled) return;

            _reEnableTimer -= Time.deltaTime;
            if (_reEnableTimer <= 0f)
            {
                _col.enabled = true;
                _isDisabled  = false;
            }
        }

        /// <summary>
        /// 由玩家状态机调用：触发下蹲跌落，临时禁用碰撞器。
        /// </summary>
        public void TriggerDropThrough()
        {
            if (!_allowDropThrough || _isDisabled) return;

            _col.enabled   = false;
            _isDisabled    = true;
            _reEnableTimer = _dropDisableDuration;
        }

#if UNITY_EDITOR
        private void OnDrawGizmos()
        {
            // 绘制蓝色轮廓以便与实体地面区分
            if (TryGetComponent<Collider2D>(out var col))
            {
                Gizmos.color = new Color(0.3f, 0.6f, 1f, 0.4f);
                Gizmos.DrawWireCube(col.bounds.center, col.bounds.size);
            }
        }
#endif
    }
}