using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using BITKit;
using BITKit.Entities;
using BITKit.Entities.Melee;
using Cysharp.Threading.Tasks;
using Cysharp.Threading.Tasks.Triggers;
using Unity.Collections;
using UnityEngine;
using UnityEngine.VFX;

namespace BITFALL.Melee
{
	[Serializable]
	public class MeleeServiceSingleton : IMeleeService
	{
		public void Melee(MeleeCommand command) => MeleeService.Melee(command);
	}
	public struct MeleeDamageMessage:IDamageType{}
	public class MeleeService : MonoBehaviour,IMeleeService
	{
		internal static MeleeService Singleton;
		[RuntimeInitializeOnLoadMethod]
		private static void Initialize()
		{
			Queue.Clear();
		}
		private static readonly Queue<MeleeCommand> Queue = new();
		public static void Melee(MeleeCommand command)=>Queue.Enqueue(command);
		[SerializeField] private LayerMask detectLayer;
		private void Awake()
		{
			Singleton = this;
		}

		private void FixedUpdate()
		{
			if (Queue.TryDequeue(out var command) is false) return;

			var colliders = Physics.OverlapSphere(command.Position, command.Range,detectLayer);
			var damaged= new List<IEntity>();
			foreach (var x in colliders.Where(x=>x.GetComponent<IDamagable>() is not null))
			{
				var damageable = x.GetComponent<IDamagable>();
				if (damaged.Contains(damageable.Entity))
				{
					continue;
				}
				damaged.Add(damageable.Entity);
				damageable.GiveDamage(new DamageMessage()
				{
					initiator = UnityEntitiesService.Get(command.PlayerId) as IEntity,
					damageType = new MeleeDamageMessage
					{
						
					},
					target = damageable.Entity,
					damage = 64,
					hit = damageable,
				});
				var direction = (damageable.Rigidbody.position - (Vector3)command.Position).normalized;
				damageable.Rigidbody.AddForceAtPositionAsync(direction * 512 ,command.Position,ForceMode.Impulse).Forget();

				if (x.TryGetComponent<ITag>(out var _tag))
				{
					DI.Get<VFXService>().Spawn(new Location
					{
						position = x.transform.position,
						rotation = Quaternion.identity,
						forward = direction
					},_tag.GetTags());
				}
			}
		}

		void IMeleeService.Melee(MeleeCommand command) => Melee(command);
	}

}