using UnityEngine;

namespace UltraCombos
{
	public abstract class Singleton<T> : MonoBehaviour where T : Component
	{

		#region Fields

		private static T instance;

		[SerializeField]
		private bool persistance = true;

		#endregion

		#region Properties

		public static T Instance
		{
			get
			{
				if (instance == null)
				{
					instance = FindFirstObjectByType<T>();
					if (instance == null)
					{
						var go = new GameObject();
						go.name = typeof(T).Name;
						instance = go.AddComponent<T>();
					}
				}
				return instance;
			}
		}

		#endregion

		#region Methods

		protected virtual void Awake()
		{
			if (instance == null)
			{
				instance = this as T;
				if (persistance)
				{
					DontDestroyOnLoad(gameObject);
				}
			}
			else
			{
				Destroy(gameObject);
			}
		}

		#endregion

	}

}