using UnityEngine;
using BaseGames.Core;
using BaseGames.Core.Events;
using BaseGames.Combat;

namespace BaseGames.VFX
{
    /// <summary>
    /// 全局命中特效派发器：订阅 HitConfirmedEventChannel，
    /// 根据 DamageInfo.FxType 从 VFXCatalog 查找并播放特效。
    /// 放置在 Persistent 场景的 [Systems] GameObject 上。
    /// </summary>
    public class HitFXSpawner : MonoBehaviour
    {
        [SerializeField] private HitConfirmedEventChannelSO _onHitConfirmed;
        [SerializeField] private VFXCatalogSO               _catalog;

        private readonly CompositeDisposable _subs = new();

        private void Awake()
        {
            Debug.Assert(_catalog != null, "[HitFXSpawner] _catalog 未赋值，请在 Inspector 中指定 VFXCatalogSO。", this);
            _catalog.Initialize();
        }

        private void OnEnable()
        {
            _onHitConfirmed?.Subscribe(HandleHit).AddTo(_subs);
        }

        private void OnDisable()
        {
            _subs.Clear();
        }

        private void HandleHit(HitInfo info)
        {
            var pool = ServiceLocator.GetOrDefault<IVFXPoolService>();
            if (pool == null) return;

            if (_catalog.TryGetHitFX(info.DamageInfo.FxType, out var vfxRef))
                pool.Play(vfxRef, info.HitPoint);
        }
    }
}