using System;
using System.Collections;
using System.Collections.Generic;
using System.Threading;
using BITKit.UX;
using UnityEngine;
using Cysharp.Threading.Tasks;
using System.Threading.Tasks;
using Task = System.Threading.Tasks.Task;

// ReSharper disable Unity.NoNullPropagation

namespace BITKit.SceneManagement.UX
{
	public class UXSceneLoading : MonoBehaviour
	{
		[Header(Constant.Header.Settings)]
		[SerializeReference, SubclassSelector] private ISceneService sceneService;
		[SerializeField] private float fadeOutTime = 0.5f;
		[SerializeField] private UXLabel sceneNameLabel;
		[SerializeField] private UXBar loadingBar;
		[SerializeField] private UXElement backgroundImage;
		[SerializeField] private bool autoDestroyAfterLoaded;
		
		protected float _progress;
		protected float _currentProgress;
		private CancellationToken _cancellationToken;

		private void Awake()
		{
			_cancellationToken = gameObject.GetCancellationTokenOnDestroy();
		}

		private void Start()
		{
			sceneService.OnLoadScene += OnLoadScene;
			sceneService.OnSceneLoadProgress+=OnSceneLoadProgress;
			sceneService.OnSceneLoaded += OnSceneLoaded;
		}

		private void Update()
		{
			_currentProgress = Mathf.Lerp(_currentProgress, _progress, Time.deltaTime * 10);
			loadingBar?.Set(_currentProgress);
		}
		private void OnDestroy()
		{
			sceneService.OnLoadScene -= OnLoadScene;
			sceneService.OnSceneLoadProgress-=OnSceneLoadProgress;
			sceneService.OnSceneLoaded -= OnSceneLoaded;
		}

		private void OnSceneLoadProgress(string arg1, float arg2)
		{
			_progress = arg2;
		}

		private void OnLoadScene(string obj)
		{
			sceneNameLabel?.Set(obj);
			
		}
		private async void OnSceneLoaded(string obj)
		{
			if(autoDestroyAfterLoaded is false)return;
			backgroundImage.SetActive(false);
			try
			{
				await Task.Delay(TimeSpan.FromSeconds(fadeOutTime),_cancellationToken);
				Destroy(gameObject);
			}
			catch (OperationCanceledException)
			{
			}
		}

	}
}