using System;
using Cielonos.MainGame.Buffs.Character;
using SLSUtilities.General;
using UnityEngine;

namespace Cielonos.MainGame.Inventory.Collections
{
    /// <summary>
    /// 聚变催化器 / Fusion Catalyst (Passive, Moser)
    /// 降低 Fusion 引爆所需的最低层数阈值。
    /// 订阅 onApplyBuffToOther，在 Fusion Buff 施加前修改 minimumStackToExplode。
    /// </summary>
    public class FusionCatalyst : PassiveEquipmentBase
    {
        private const string EventKey = nameof(FusionCatalyst);

        public override void OnObtained()
        {
            base.OnObtained();
            Action<CharacterBuffBase> onApplyBuff = OnApplyBuffToOther;
            player.eventSm.onApplyBuffToTarget.Add(EventKey, onApplyBuff.ToPrioritized());
        }

        public override void OnDiscarded()
        {
            player.eventSm.onApplyBuffToTarget.Remove(EventKey);
            base.OnDiscarded();
        }

        /// <summary>
        /// 在 Buff 施加到目标前拦截，若为 Fusion 则降低其引爆阈值。
        /// </summary>
        private void OnApplyBuffToOther(CharacterBuffBase buff)
        {
            if (buff is not Fusion fusion) return;
            int reduction = Mathf.RoundToInt(passiveAttributeSm.GetItemAttribute("FusionExplosionThresholdReduction"));
            fusion.minimumStackToExplode -= reduction;
        }
    }
}