using UnityEngine;

namespace GameFramework
{
    /// <summary>
    /// 持久化单例基类。跨场景保留（DontDestroyOnLoad），重复实例自动销毁。
    /// 管理器（AudioManager / ScoreManager / GameManager / SceneLoader）都继承它。
    /// </summary>
    public class PersistentSingleton<T> : MonoBehaviour where T : Component
    {
        public static T Instance { get; private set; }

        protected virtual void Awake()
        {
            if (Instance == null)
            {
                Instance = this as T;
            }
            else if (Instance != this)
            {
                Destroy(gameObject);
                return;
            }
            DontDestroyOnLoad(gameObject);
        }
    }
}