using UnityEngine;
using BaseGames.Parry;

namespace BaseGames.Combat
{
    /// <summary>
    /// 可被玩家弹反的抛射物。
    /// 触发时优先检测弹反窗口；若成功弹反则反向飞行并可切换伤害源；
    /// 否则走正常伤害流水线。
    /// </summary>
    public class ParryableProjectile : LinearProjectile
    {
        [SerializeField] private DamageSourceSO _reflectSource;

        private bool _reflected;

        protected override void OnInitialized()
        {
            // 禁用子 HitBox 的自动检测，改由本组件的 OnTriggerEnter2D 手动处理，
            // 以便在命中前插入弹反判断。
            _hitBox.Deactivate();
            _rb.velocity = Direction * _config.Speed;
        }

        private void OnTriggerEnter2D(Collider2D other)
        {
            // ── 弹反判断 ────────────────────────────────────────────────
            if (!_reflected)
            {
                var parrySystem = other.GetComponentInParent<ParrySystem>();
                if (parrySystem != null && parrySystem.IsParrying && parrySystem.ConsumeParry())
                {
                    _reflected   = true;
                    Direction    = -Direction;
                    _rb.velocity = Direction * _config.Speed * _config.ParrySpeedMultiplier;

                    // 阵营随弹反翻转：切到 PlayerProjectile 层（否则碰撞矩阵
                    // EnemyProjectile↔EnemyHurtBox 不碰撞，反射后永远打不中敌人），
                    // 伤害目标层同步从玩家侧切到敌人侧。
                    int playerProjLayer = LayerMask.NameToLayer("PlayerProjectile");
                    if (playerProjLayer >= 0) gameObject.layer = playerProjLayer;
                    RetargetToEnemyFaction();

                    if (_reflectSource != null)
                        DamageInfo = DamageInfo.From(_reflectSource);
                    return;
                }
            }

            // ── 正常命中 ─────────────────────────────────────────────────
            // 本类绕过 HitBox 自行判定，需自行套用其伤害目标层过滤
            if ((_hitBox.TargetLayers.value & (1 << other.gameObject.layer)) == 0) return;
            var hurtBox = other.GetComponent<HurtBox>();
            if (hurtBox != null)
            {
                hurtBox.ReceiveDamage(DamageInfo);
                ReturnToPool();
            }
        }

        protected override void OnDisable()
        {
            base.OnDisable();
            _reflected = false;
        }
    }
}