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

namespace Azerion.BlueStack.Common
{
    public class AdsEventExecutor : MonoBehaviour
    {
        public static AdsEventExecutor instance = null;
        private static List<Action> adEventsQueue = new List<Action>();
        private static volatile bool adEventsQueueEmpty = true;

        public static void Initialize()
        {
            if (IsActive())
            {
                return;
            }

            GameObject gameObject = new GameObject("AdsMainThreadExecuter");
            gameObject.hideFlags = HideFlags.HideAndDontSave;
            DontDestroyOnLoad(gameObject);
            instance = gameObject.AddComponent<AdsEventExecutor>();
        }

        public static bool IsActive()
        {
            return instance != null;
        }

        public void Awake()
        {
            DontDestroyOnLoad(gameObject);
        }

        public static void ExecuteInUpdate(Action action)
        {
            if (action == null) return;
            object obj = adEventsQueue;
            lock (obj)
            {
                adEventsQueue.Add(action);
                adEventsQueueEmpty = false;
            }
        }

        public static void InvokeInUpdate(UnityEvent eventParam)
        {
            ExecuteInUpdate(delegate { eventParam.Invoke(); });
        }

        public void Update()
        {
            if (adEventsQueueEmpty)
            {
                return;
            }

            List<Action> list = new List<Action>();
            object obj = adEventsQueue;
            lock (obj)
            {
                list.AddRange(adEventsQueue);
                adEventsQueue.Clear();
                adEventsQueueEmpty = true;
            }

            foreach (Action current in list)
            {
                if (current.Target != null)
                {
                    current();
                }
            }
        }

        public void OnDisable()
        {
            instance = null;
        }
    }
}