using UnityEngine;
using Platformer.Mechanics;

namespace EerieVillage.Skills.Effectors
{
    /// <summary>
    /// PD 지시 2026-05-13 — Inspector 영역 ActiveSkillData 값 변경 시 살아있는 시각화 박스도 즉시 반영.
    /// LateUpdate 매 frame data 정합 갱신: position·rotation·localScale.
    /// </summary>
    public class LiveHitboxSync : MonoBehaviour
    {
        public enum FollowMode
        {
            /// <summary>Anchor + (0, OffsetDistance) + OffsetXY · size=HitboxSize · rot=FxRotation (A05 MeleeArea)</summary>
            AnchorYOffset,
            /// <summary>Anchor (Enemy) + (0, OffsetDistance) + OffsetXY · size=HitboxSize · rot=FxRotation (A04 Lightning·primary 사망 시 마지막 위치 유지)</summary>
            EnemyAnchoredAtStrike,
            /// <summary>Anchor (Player) + facing × (OffsetDistance + length/2) + OffsetXY · size=(length, width) · rot=facing+FxRotation (A_Laser)</summary>
            PlayerFacingLaser,
        }

        public ActiveSkillData Data;
        public Transform Anchor;
        public FollowMode Mode;
        // PlayerFacingLaser 영역 영역 — Anchor (Player) 영역 PlayerController.Facing 영역 영역
        public PlayerController PlayerCtrl;
        // EnemyAnchoredAtStrike — Anchor (primary enemy) 사망 시 마지막 위치 캐싱
        Vector2 _lastAnchorPos;
        bool _hasLastPos;

        void LateUpdate()
        {
            if (Data == null) return;

            Vector2 anchorPos;
            if (Anchor != null) { anchorPos = Anchor.position; _lastAnchorPos = anchorPos; _hasLastPos = true; }
            else if (_hasLastPos) anchorPos = _lastAnchorPos;
            else return;

            Vector2 pos = anchorPos;
            float angle = 0f;
            Vector3 scale = transform.localScale;

            switch (Mode)
            {
                case FollowMode.AnchorYOffset:
                case FollowMode.EnemyAnchoredAtStrike:
                    pos += Data.OffsetDistance + Data.OffsetXY;
                    angle = Data.FxRotation;
                    scale = new Vector3(Data.HitboxSize.x, Data.HitboxSize.y, 1f);
                    break;
                case FollowMode.PlayerFacingLaser:
                    Vector2 facing = (PlayerCtrl != null) ? PlayerCtrl.Facing : Vector2.right;
                    facing = facing.normalized;
                    float length = Mathf.Max(Data.HitboxSize.x, 1f);
                    float width = Mathf.Max(Data.HitboxSize.y, 0.5f);
                    pos += Data.OffsetDistance + Data.OffsetXY + facing * (length * 0.5f);
                    angle = Mathf.Atan2(facing.y, facing.x) * Mathf.Rad2Deg + Data.FxRotation;
                    scale = new Vector3(length, width, 1f);
                    break;
            }

            transform.position = pos;
            transform.rotation = Quaternion.Euler(0f, 0f, angle);
            transform.localScale = scale;
        }
    }
}