using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using BITKit;
using BITKit.Entities;
using JetBrains.Annotations;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.InputSystem.Interactions;

namespace BITFALL.Entities.Improvised
{
	[CustomType(typeof(ImprovisedServiceInterface))]
	public class ImprovisedService : EntityBehavior,ImprovisedServiceInterface
	{
		[Inject] private IHealth _health;
		[Inject(true)] private IKnockdown _knockdown;
		
		private IBasicItem _improvisedItem;
		
		public event Func<IBasicItem, bool> OnTryEquipImprovisedItem;
		public event Func<IBasicItem, bool> OnTryUnEquipImprovisedItem;
		public event Action<IBasicItem> OnEquipImprovisedItem;
		public event Action<IBasicItem> OnUnEquipImprovisedItem;

		public override void OnAwake()
		{
			_health.OnSetAlive += _ =>
			{
				TryUnEquipImprovised(out var _);
			};
			if (_knockdown is not null)
			{
				_knockdown.OnKnockdown += () =>
				{
					TryUnEquipImprovised(out _);
				};
			}
		}

		public bool IsImprovised => _improvisedItem is not null;

		public bool TryGetImprovisedItem(out IBasicItem item)
		{
			item = _improvisedItem;
			return item is not null;
		}

		public bool TryEquipImprovisedItem(IBasicItem weapon)
		{
			if (OnTryEquipImprovisedItem.CastAsFunc().Any(func => func.Invoke(weapon) is false))
			{
				return false;
			}
			if (TryGetImprovisedItem(out var current))
			{
				TryUnEquipImprovised(out _);
			}
			_improvisedItem = weapon;
			OnEquipImprovisedItem?.Invoke(weapon);
			return true;
		}
		public void TryUnEquipImprovised()=>
			TryUnEquipImprovised(out var _);
		public void TryUnEquipImprovised(InputAction.CallbackContext context)
		{
			if (context is { interaction: PressInteraction, performed: true })
			//if (context is { interaction: HoldInteraction, performed: true })
			{
				TryUnEquipImprovised(out var _);
			}
		}
		public bool TryUnEquipImprovised(out IBasicItem weapon)
		{
			if (_improvisedItem is null)
			{
				weapon = null;
				return false;
			}
			if (OnTryUnEquipImprovisedItem.CastAsFunc().Any(x => x.Invoke(_improvisedItem) is false))
			{
				weapon = null;
				return false;
			}
			weapon = _improvisedItem;
			_improvisedItem = null;
			OnUnEquipImprovisedItem?.Invoke(weapon);
			return true;
		}
		

	}
}