using System.Collections.Generic;
using UnityEngine;

public class UnityMainThreadDispatcher : MonoBehaviour
{
    private static readonly Queue<System.Action> _executionQueue = new Queue<System.Action>();

    private static UnityMainThreadDispatcher _instance;
    public static UnityMainThreadDispatcher Instance()
    {
        if (_instance == null)
        {
            GameObject go = new GameObject("MainThreadDispatcher");
            _instance = go.AddComponent<UnityMainThreadDispatcher>();
            DontDestroyOnLoad(go);
        }
        return _instance;
    }

    public void Enqueue(System.Action action)
    {
        lock (_executionQueue)
        {
            _executionQueue.Enqueue(action);
        }
    }

    private void Update()
    {
        while (_executionQueue.Count > 0)
        {
            var action = _executionQueue.Dequeue();
            action();
        }
    }
}