using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using BITKit;
using BITKit.Entities;
using BITKit.Entities.Player;
using BITKit.Events;
using BITKit.Game;
using BITKit.Sensors;
using Cysharp.Threading.Tasks;
using UnityEngine;

namespace BITFALL.Scenes
{
	public class EvacuateArea : MonoBehaviour,IAction
	{
		[SerializeReference, SubclassSelector] private ISensor sensor;
		[SerializeReference,SubclassSelector] private IGameService gameService;

		[SerializeField] private Optional<float> stopGameWhenEvacuated = new();
		
		[SerializeField] private UnityEvent onEvacuated;
		private CancellationToken _cancellationToken;
		private void Start()
		{
			_cancellationToken = this.GetCancellationTokenOnDestroy();
		}

		public async void EvacuateScopedPlayer()
		{
			var players = sensor.Get()
				.FirstOrDefault(x=> x.TryGetComponent<IEntityPlayerComponent>(out _));
			
			if(players is null)return;

			var player = players.GetComponent<IEntityPlayerComponent>();
			
			Destroy(players.gameObject);

			if (!stopGameWhenEvacuated.Allow)
			{
				onEvacuated?.Invoke();
				return;
			}
			
			BIT4Log.Log<EvacuateArea>($"玩家已撤离,战局将在{stopGameWhenEvacuated.Value}秒后停止");

			try
			{
				await Task.Delay(TimeSpan.FromSeconds(stopGameWhenEvacuated.Value), _cancellationToken);
			}
			catch (OperationCanceledException)
			{
				return;
			}
		
			BIT4Log.Log<EvacuateArea>($"玩家已撤离,战局已停止");
			gameService.Stop();
			
			onEvacuated?.Invoke();
		}

		void IAction.Execute() => EvacuateScopedPlayer();
	}
}