using UnityEngine;
using BaseGames.Core.Events;

namespace BaseGames.Player
{
    /// <summary>
    /// 灵泉充能系统（架构 05_PlayerModule §7）。
    /// 订阅 EVT_EnemyDied 事件，每次击杀调用 PlayerStats.AddKillPoints()；
    /// 积分达到阈值时由 PlayerStats 内部自动增加 SpringCharge 并重置积分。
    /// 使用灵泉（UseSpring）由 PlayerController 处理输入、SpringState 执行动画与消耗。
    /// </summary>
    public class SpringSystem : MonoBehaviour
    {
        [SerializeField] private PlayerStats            _stats;
        [SerializeField] private StringEventChannelSO  _onEnemyDied;   // EVT_EnemyDied

        private EventSubscription _sub;
        private bool _subscribed;

        private void OnEnable()
        {
            if (_onEnemyDied != null)
            {
                _sub = _onEnemyDied.Subscribe(OnEnemyDied);
                _subscribed = true;
            }
        }

        private void OnDisable()
        {
            if (_subscribed)
            {
                _sub.Dispose();
                _subscribed = false;
            }
        }

        private void OnEnemyDied(string _enemyId)
        {
            _stats?.AddKillPoints(1);
        }
    }
}