using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using Cysharp.Threading.Tasks;
using UnityEngine;

namespace BITKit.Sensors
{
	public class SensorQueue : MonoBehaviour
	{
		internal static readonly Dictionary<int,ISensor> Sensors=new();
		private static bool IsDirty;
		
		[SerializeField,ReadOnly] private int _position;
		
		private static int[] _keys;
		
		public static void Register(int id,ISensor sensor)
		{
			Sensors.Add(id,sensor);
			MarkDirty();
		}
		public static void UnRegister(int id)
		{
			Sensors.Remove(id);
			MarkDirty();
		}
		public static void MarkDirty()
		{
			IsDirty = true;
		}
		
		[SerializeField] private MonoBehaviour[] sensors;
		
		private void Update()
		{
			if (SensorGlobalSettings.Enabled is false) return;
			if(IsDirty)
			{
				_position = 0;
				_keys = Sensors.Where(IsEnabled).Select(x=>x.Key).ToArray();
				IsDirty = false;
				sensors = Sensors.Values.Where(IsEnabled).OfType<MonoBehaviour>().ToArray();
			}

			if(Sensors.Count is 0) return;
			
			Sensors.ElementAt(_position++).Value.Execute().Forget();
			
			_position %= Sensors.Count;
		}
		private bool IsEnabled(ISensor sensor)
		{
			return sensor.AutoUpdate;
		}
		private bool IsEnabled(KeyValuePair<int,ISensor> pair)
		{
			return pair.Value.AutoUpdate;
		}
	}

}