using System;
using System.Collections;
using System.Collections.Generic;
using System.Threading;
using BITKit;
using BITKit.Tween;
using Cysharp.Threading.Tasks;
using NodeCanvas.Framework;
using UnityEngine;
using UnityEngine.UI;
using Object = UnityEngine.Object;

namespace Net.Project.B.NodeCanvas
{
    public class BlackScreenTask : ActionTask
    {
        [RuntimeInitializeOnLoadMethod]
        private static void Reload()
        {
            var newGo = new GameObject("black screen");
            var canvas =   newGo.AddComponent<Canvas>();
            canvas.renderMode = RenderMode.ScreenSpaceOverlay;

            canvas.vertexColorAlwaysGammaSpace = true;
            
            Object.DontDestroyOnLoad(newGo);

            var newImageGo = new GameObject("image");
            newImageGo.transform.SetParent(newGo.transform);
            
            var image = newImageGo.AddComponent<UnityEngine.UI.Image>();
            image.color = Color.clear;
            image.raycastTarget = false;
            image.rectTransform.anchorMin = Vector2.zero;
            image.rectTransform.anchorMax = Vector2.one;
            image.rectTransform.sizeDelta = Vector2.zero;
            image.rectTransform.anchoredPosition = Vector2.zero;

            _image = image;
        }

        private static Image _image;
        private static CancellationTokenSource _cancellationTokenSource;

        protected override async void OnExecute()
        {
            _cancellationTokenSource?.Cancel();

            _cancellationTokenSource = new CancellationTokenSource();

            try
            {
                await BITween.Lerp(x => _image.color = x, Color.clear, Color.black, 1f, Color.Lerp,
                    _cancellationTokenSource.Token);

            }
            catch (OperationCanceledException)
            {
                return;
            }
            finally
            {
                EndAction();
            }

            try
            {
                await UniTask.NextFrame();
                await UniTask.NextFrame();
                
                await BITween.Lerp(x => _image.color = x, Color.black, Color.clear, 1f, Color.Lerp,
                    _cancellationTokenSource.Token);
            }
            catch (OperationCanceledException)
            {
                
            }
        }

        protected override void OnStop(bool interrupted)
        {
            if (interrupted)
            {
                _cancellationTokenSource?.Cancel();
            }
        }
    }
}