using UnityEngine;
using UnityEngine.SceneManagement;

namespace UltimateWater.Internal
{
	public class SceneSingleton<T> : MonoBehaviour where T : MonoBehaviour
	{
		private static T _Instance;

		private static bool _Quiting;

		public static T Instance
		{
			get
			{
				if (_Instance != null)
				{
					return _Instance;
				}
				SceneManager.sceneUnloaded -= OnSceneUnloaded;
				SceneManager.sceneUnloaded += OnSceneUnloaded;
				_Instance = (T)Object.FindObjectOfType(typeof(T));
				if (_Instance != null)
				{
					return _Instance;
				}
				if (_Quiting)
				{
					return null;
				}
				_Instance = new GameObject("[" + typeof(T).Name + "] - instance").AddComponent<T>();
				return _Instance;
			}
		}

		private void OnApplicationQuit()
		{
			_Quiting = true;
		}

		private void OnDestroy()
		{
			_Quiting = true;
		}

		private static void OnSceneUnloaded(Scene scene)
		{
			_Quiting = false;
		}
	}
}