using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using BITKit;
using BITKit.Entities;
using UnityEngine.UIElements;
using UnityEngine.InputSystem;
using BITKit.Animations;
using BITKit.StateMachine;
using BITFALL;
namespace BITFALL.Guns
{
    [System.Serializable]
    public class Idle : GunState, ISelectableCallback
    {
        public override void OnStateEnter(IState old)
        {
            root.animator.CrossFade(BITGun._Movement, 0.16f);
            root.Entity.RegisterCallback<ISelectableCallback>(this);
        }
        public override void OnStateExit(IState old, IState newState)
        {
            base.OnStateExit(old, newState);
            root.Entity.UnRegisterCallback<ISelectableCallback>(this);
        }
        public override void OnStateUpdate()
        {
            if (root.animator[0].stateName is BITGun._Movement)
            {
                if (root.isFiring.shouldBe && root.fireUpdater)
                {
                    root.Fire();
                }
                if (root.isAiming.shouldBe && BITAppForUnity.AllowCursor == false)
                {
                    root.stateMachine.StateMachine.TransitionState<Aim>();
                }
            }
        }
        public override void OnMovementCallback(IMovementCallback callback)
        {
            switch (callback)
            {
                case OnRunCallback runCallback:
                    if (runCallback.started || runCallback.updated)
                    {
                        root.stateMachine.StateMachine.TransitionState<Run>();
                    }
                    break;
            }
        }

        public void OnHover(ISelectable selectable)
        {
        }

        public void OnActive(ISelectable selectable)
        {
            root.animator.Play(BITGun._Interactive);
        }

        public void OnInactive(ISelectable selectable)
        {
        }
    }
    [System.Serializable]
    public class Run : GunState
    {
        public override void OnStateEnter(IState old)
        {
            root.animator.CrossFade(BITGun._Run, 0.16f);

            root.actionGroup.RegisterCallback(root.aimAction, OnAim);
        }
        public override void OnStateExit(IState old, IState newState)
        {
            root.actionGroup.UnRegisterCallback(root.aimAction, OnAim);
        }
        public override void OnStateUpdate()
        {
            if (root.animator[0].stateName == BITGun._Movement)
            {
                root.animator.CrossFade(BITGun._Run, 0.32f);
            }
        }
        public override void OnMovementCallback(IMovementCallback callback)
        {
            switch (callback)
            {
                case OnRunCallback runCallback:
                    if (runCallback.canceled || runCallback.updated is false)
                    {
                        root.stateMachine.StateMachine.TransitionState<Idle>();
                    }
                    break;
            }
        }
        void OnAim(InputAction.CallbackContext context)
        {
            if (context.started && BITAppForUnity.AllowCursor == false)
            {
                root.stateMachine.StateMachine.TransitionState<Aim>();
            }
        }
    }
    [System.Serializable]
    public class Aim : GunState
    {
        public override void OnStateEnter(IState old)
        {
            root.animator.CrossFade(BITGun._Aim, 0.16f);
            root.Entity
            .Invoke<IMovementCancelAction>(
                new CancelRunOrSprint()
            );
        }
        public override void OnStateUpdate()
        {
            if (root.isFiring.shouldBe && root.fireUpdater)
            {
                root.Fire();
            }

            if (BITAppForUnity.AllowCursor)
            {
                root.stateMachine.StateMachine.TransitionState<Idle>();
            }
            else if (root.isAiming.shouldBe)
            {

            }
            else
            {
                root.stateMachine.StateMachine.TransitionState<Idle>();
            }
        }
        public override void OnMovementCallback(IMovementCallback callback)
        {
            switch (callback)
            {
                case OnRunCallback runCallback:
                    if (runCallback.started)
                    {
                        root.stateMachine.StateMachine.TransitionState<Idle>();
                    }
                    break;
            }
        }
    }
    [System.Serializable]
    public class Equip : GunState
    {
        IntervalUpdate updater = new(0.16f);
        public override void OnStateEnter(IState old)
        {
            updater.Reset();
            root.animator.Play(BITGun._Equip);
        }
        public override void OnStateUpdate()
        {
            var state = root.animator[0];
            if (updater.canUpdate)
            {
                if (state.stateName == BITGun._Equip)
                {
                    if (state.currentState.normalizedTime >= 1)
                    {
                        root.stateMachine.StateMachine.TransitionState<Idle>();
                    }
                }
                else
                {
                    root.animator.Play(BITGun._Equip);
                }
            }
        }
    }
}