namespace Davanci.Utils
{
    using UnityEngine;
    public class SingletonMB<T> : MonoBehaviour where T : class
    {
        private static SingletonMB<T> instance;

        /// <summary>
        ///     Makes the object singleton not be destroyed automatically when loading a new scene.
        /// </summary>
        public bool DontDestroy;

        public static T Instance => instance as T;

        protected virtual void Awake()
        {
            if (instance != null)
            {
                Destroy(gameObject);
            }
            else
            {
                instance = this;
                if (DontDestroy)
                    DontDestroyOnLoad(this);
                Initialize();
            }
        }

        protected virtual void Initialize()
        {
        }

        protected virtual void Shutdown()
        {
        }

        protected virtual void OnDestroy()
        {
            if (instance == this)
            {
                instance = null;
                Shutdown();
            }
        }

        protected virtual void OnApplicationQuit()
        {
            if (instance == this)
            {
                instance = null;
                Shutdown();
            }
        }
    }
}