using System;
using System.Collections.Generic;
using UnityEngine;

public class MainThreadDispatcher : MonoBehaviour
{
    private static MainThreadDispatcher instance;
    private readonly Queue<Action> callbacksQueue = new Queue<Action>();

    private void Awake()
    {
        if (instance == null)
        {
            instance = this;
            DontDestroyOnLoad(gameObject);
        }
        else
        {
            Destroy(gameObject);
        }
    }

    public static void Enqueue(Action callback)
    {
        lock (instance.callbacksQueue)
        {
            instance.callbacksQueue.Enqueue(callback);
        }
    }

    private void Update()
    {
        lock (callbacksQueue)
        {
            while (callbacksQueue.Count > 0)
            {
                callbacksQueue.Dequeue().Invoke();
            }
        }
    }
}