using System;
using System.Collections.Generic;
using System.Reflection;
using UnityEngine;
using UnityEngine.SceneManagement;

public class MonoBehaviourSingleton<T> : MonoBehaviourExtended where T : MonoBehaviour
{
	private static readonly Dictionary<Type, object> instances = new Dictionary<Type, object>();

	public static T Instance
	{
		get
		{
			Type typeFromHandle = typeof(T);
			if (!instances.TryGetValue(typeFromHandle, out var value))
			{
				bool flag = false;
				MethodInfo methodInfo = typeFromHandle.GetMethod("GetComponentInChildren", new Type[0]).MakeGenericMethod(typeFromHandle);
				for (int i = 0; i < SceneManager.sceneCount; i++)
				{
					Scene sceneAt = SceneManager.GetSceneAt(i);
					GameObject[] rootGameObjects = sceneAt.GetRootGameObjects();
					foreach (GameObject gameObject in rootGameObjects)
					{
						Transform obj = gameObject.transform;
						object[] parameters = new Type[0];
						object obj2 = methodInfo.Invoke(obj, parameters);
						if (obj2 != null)
						{
							return obj2 as T;
						}
					}
					if (!sceneAt.isLoaded)
					{
						flag = true;
					}
				}
				if (flag)
				{
					return null;
				}
				MonoBehaviourExtended.LogWarning("Not found " + typeFromHandle.Name + " in the scene!");
				MonoBehaviourExtended.Log("Creating new instance of " + typeFromHandle.Name + ". Start() will be delayed one frame!");
				GameObject obj3 = new GameObject(typeFromHandle.Name, typeFromHandle);
				UnityEngine.Object.DontDestroyOnLoad(obj3);
				return obj3.GetComponent<T>();
			}
			return value as T;
		}
		private set
		{
			instances.Add(typeof(T), value);
		}
	}

	protected new void Awake()
	{
		if (!instances.ContainsKey(typeof(T)))
		{
			Instance = this as T;
		}
		else
		{
			MonoBehaviourExtended.LogWarning("There are multiple " + typeof(T).Name + " in the scene!");
		}
		base.Awake();
	}

	protected void OnDestroy()
	{
		instances.Remove(typeof(T));
	}
}