using System;
using System.Collections;
using System.Collections.Generic;
using BITFALL.Items.Melee;
using BITKit;
using BITKit.Core.Entites;
using BITKit.Entities;
using BITKit.Entities.Melee;
using BITKit.StateMachine;
using Cysharp.Threading.Tasks;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.InputSystem.Interactions;

namespace BITFALL.Entities.Equipment.Melee
{
	public interface IPlayerMeleeControllerState : IState
	{
	}
	public abstract class PlayerMeleeControllerState : IPlayerMeleeControllerState
	{
		[SerializeField] protected MeleeController meleeController;

		public virtual bool Enabled { get; set; }
		public virtual void Initialize()
		{
			
		}

		public virtual void OnStateEntry(IState old)
		{
		}

		public virtual void OnStateUpdate(float deltaTime)
		{
		}

		public virtual void OnStateExit(IState old, IState newState)
		{
		}
	}
	public sealed class MeleeController : BITEquipBase<IPlayerMeleeControllerState>
	{
		[Header(Constant.Header.Input)]
		[SerializeField] private InputActionReference attackAction;

		[Header(Constant.Header.Gameobjects)]
		[SerializeField] private Transform velocityReference;
		
		public override string AddressablePath => item.AddressablePath;
		public AssetableMelee melee => item as AssetableMelee;
		protected override Vector3 meleeForce => _velocity;
		private Vector3 _velocity;
		private Vector3 _lastPosition;
		
		[Inject]
		private IEntityMovement _movement;
		public override void OnAwake()
		{
			base.OnAwake();
			inputActionGroup.RegisterCallback(attackAction, OnAttack);
		}

		public override void Entry()
		{
			base.Entry();
			TransitionState<Draw>();
		}

		public override void OnUpdate(float deltaTime)
		{
			base.OnUpdate(deltaTime);
			var position = velocityReference.position;
			_velocity = (position - _lastPosition).normalized;
			_lastPosition = position;
			UpdateState(deltaTime);

			var sqr = _movement.LocomotionBasedVelocity.sqrMagnitude;
			
			animator.animator.SetFloat(BITConstant.Player.SqrMagnitude,sqr);
		}

		private void OnAttack(InputAction.CallbackContext context)
		{
			//如果启用了指针则不开火
			if(BITAppForUnity.AllowCursor)
			{
				return;
			}
			switch (context)
			{
				case {interaction: TapInteraction,performed:true} when CurrentState is not (Attack or HeavyAttack or Draw):
					TransitionState<Attack>();
					break;
				case {interaction: HoldInteraction,started:true} when CurrentState is not (Charging or Attack or HeavyAttack or Draw):
					TransitionState<Charging>();
					break;
				case {interaction: HoldInteraction,canceled:true} when CurrentState is not (Attack or Idle or Draw):
					TransitionState<HeavyAttack>();
					break;
			}
		}
	
	}

}