using UnityEngine;

namespace UFS3.Management
{
	public class SceneSingleton<T> : MonoBehaviour where T : MonoBehaviour
	{
		private static T _instance;

		private static readonly object _lock = new object();

		public static T Instance
		{
			get
			{
				if (_instance == null)
				{
					lock (_lock)
					{
						if (_instance == null)
						{
							_instance = Object.FindObjectOfType<T>();
							if (_instance == null)
							{
								_instance = new GameObject(typeof(T).Name).AddComponent<T>();
							}
						}
					}
				}
				return _instance;
			}
		}

		protected virtual void Awake()
		{
			if (_instance != null && _instance != this)
			{
				Debug.Log("Copy of Singleton Instance already exists, destroying new one.");
				Object.Destroy(base.gameObject);
			}
			else
			{
				_instance = this as T;
			}
		}
	}
}