using System.Data.Odbc;
using BITFALL.Player.Equip;
using BITFALL.Player.Movement;
using BITKit;
using BITKit.Entities;
using BITKit.Selection;
using UnityEngine.InputSystem;
using BITKit.StateMachine;
using UnityEngine;

namespace BITFALL.Guns.States
{
    [System.Serializable]
    public sealed class None:GunState
    {
    }
    [System.Serializable]
    public class Movement : GunState
    {
        [SerializeField] private ExpectState<bool> _expectRun;
        [Inject] protected ISelector _selector;
        public override void OnStateEntry(IState old)
        {
            switch (old)
            {
                case Aim:
                    root.animator.CrossFade(BITConstant.Player.Movement, 0.32f);
                    break;
                default:
                    root.animator.CrossFade(BITConstant.Player.Movement, 0.16f);
                    break;
            }
            _selector.OnActive += OnActive;
        }
        public override void OnStateExit(IState old, IState newState)
        {
            base.OnStateExit(old, newState);
            _selector.OnActive -= OnActive;
        }
        public override void OnStateUpdate(float deltaTime)
        {
            if (root.animator[0].stateName is not BITConstant.Player.Movement) return;
            if (root.expectFiring.shouldBe && root.fireInterval.AllowUpdate)
            {
                root.Fire();
            }
            if (root.expectAiming.shouldBe && BITAppForUnity.AllowCursor == false)
            {
                root.TransitionState<Aim>();
            }else if (_expectRun)
            {
                root.TransitionState<Run>();
            }
        }
        public void OnActive(ISelectable selectable)
        {
            root.animator.Play(BITConstant.Player.Interactive);
        }
        public override void OnMovementStateChanged(IEntityMovementState old, IEntityMovementState newState)
        {
            _expectRun = newState is IPlayerRunState or IPlayerSprintState;
            if (newState is IPlayerSlideState)
            {
                root.TransitionState<Movement>();
                root.animator.CrossFade(BITConstant.Player.Slide, 0.32f);
            }
        }
    }
    [System.Serializable]
    public sealed class Run : GunState
    {
        private ExpectState<bool> _expectRun;
        private ExpectState<bool> _expectSprint;
        public override void OnStateEntry(IState old)
        {
            root.animator.CrossFade(BITConstant.Player.Run, 0.16f);

            root.inputActionGroup.RegisterCallback(root.aimAction, OnAim);
        }
        public override void OnStateExit(IState old, IState newState)
        {
            root.inputActionGroup.UnRegisterCallback(root.aimAction, OnAim);
        }
        public override void OnStateUpdate(float deltaTime)
        {
            if (root.animator[0].stateName == BITConstant.Player.Movement)
            {
                root.animator.CrossFade(BITConstant.Player.Run, 0.32f);
            }
            if(_expectSprint)
            {
                root.TransitionState<Sprint>();
            }
            else if(_expectRun == false)
            {
                root.TransitionState<Movement>();
            } 
        }
        private void OnAim(InputAction.CallbackContext context)
        {
            if (context.started && BITAppForUnity.AllowCursor == false)
            {
                root.TransitionState<Aim>();
            }
        }

        public override void OnMovementStateChanged(IEntityMovementState old, IEntityMovementState newState)
        {
            _expectRun = newState is IPlayerRunState or IPlayerSprintState;
            _expectSprint = newState is IPlayerSprintState;
        }
    }
    [System.Serializable]
    public sealed class Sprint : GunState
    {
        private ExpectState<bool> _expectSprint;
        public override void OnStateEntry(IState old)
        {
            root.animator.CrossFade(BITConstant.Player.Sprint, 0.32f);

            root.inputActionGroup.RegisterCallback(root.aimAction, OnAim);
        }
        public override void OnStateExit(IState old, IState newState)
        {
            root.inputActionGroup.UnRegisterCallback(root.aimAction, OnAim);
        }
        public override void OnStateUpdate(float deltaTime)
        {
            if(_expectSprint == false)
            {
                root.TransitionState<Movement>();
            }
        }
        private void OnAim(InputAction.CallbackContext context)
        {
            if (context.started && BITAppForUnity.AllowCursor == false)
            {
                root.TransitionState<Aim>();
            }
        }
        public override void OnMovementStateChanged(IEntityMovementState old, IEntityMovementState newState)
        {
            _expectSprint = newState is IPlayerSprintState;
        }
    }
    [System.Serializable]
    public sealed class Aim : GunState
    {
        [Inject]
        private IEquipService _equipService;
        public override void OnStateEntry(IState old)
        {
            switch (old)
            {
                case IPlayerRunState:
                case IPlayerSprintState:
                    root.animator.CrossFade(BITConstant.Player.Aim, 0.32f);
                    break;
                default:
                    root.animator.CrossFade(BITConstant.Player.Aim, 0.16f);
                    break;
            }
            _equipService.Zoom.Allow = true;
            _entityMovement.ExecuteCommand<PlayerCancelRunCommand>();
        }

        public override void OnStateUpdate(float deltaTime)
        {
            if (root.expectFiring.shouldBe && root.fireInterval.AllowUpdate)
            {
                root.Fire();
            }

            if (BITAppForUnity.AllowCursor)
            {
                root.TransitionState<Movement>();
            }
            else if (root.expectAiming.shouldBe)
            {

            }
            else
            {
                root.TransitionState<Movement>();
            }
            _equipService.Zoom.Value = root.aimAction.action.ReadValue<float>();
        }

        public override void OnStateExit(IState old, IState newState)
        {
            base.OnStateExit(old, newState);
            _equipService.Zoom.Allow = false;
        }

        public override void OnMovementStateChanged(IEntityMovementState old, IEntityMovementState newState)
        {
            if (Enabled is false) return;
            if (newState is not (IPlayerRunState or IPlayerSprintState)) return;
            root.expectAiming.Reset();
            root.TransitionState<Movement>();
        }
    }
    [System.Serializable]
    public sealed class Equip : GunState
    {
        private bool completed;
        public override void Initialize()
        {
            base.Initialize();
            root.animator[0].onStateExit += OnAnimationStateExit;
        }


        private void OnAnimationStateExit(string obj)
        {
            if (obj is BITConstant.Player.Equip) completed = true;
        }

        public override void OnStateEntry(IState old)
        {
            completed = false;
            root.animator.Play(BITConstant.Player.Equip,-1,0);
            root.animator.animator.Update(0);
        }
        public override void OnStateUpdate(float deltaTime)
        {
            var state = root.animator[0];
            if (state.stateName == BITConstant.Player.Equip)
            {
                if (completed)
                {
                    root.TransitionState<Movement>();
                }
            }
            else
            {
                root.animator.Play(BITConstant.Player.Equip);
            }
        }
    }

    [System.Serializable]
    public sealed class Reload:GunState
    {
        public override void Initialize()
        {
            base.Initialize();
            root.animator[0].onStateExit += OnAnimationStateExit;
        }
        private void OnAnimationStateExit(string obj)
        {
            if (Enabled is false) return;
            if(obj is BITConstant.Player.Reload)
            {
                root.TransitionState<Movement>();
            }
        }
        public override void OnStateEntry(IState old)
        {
            base.OnStateEntry(old);
           
            _entityMovement.ExecuteCommand<PlayerCancelRunCommand>();
            
            root.UnityEntity.Invoke(Constant.Animation.Play, BITConstant.Player.Reload);
        }
        public override void OnMovementStateChanged(IEntityMovementState old, IEntityMovementState newState)
        {
            if (Enabled is false) return;
            if (newState is IPlayerRunState or IPlayerSprintState)
            {
                root.TransitionState<Movement>();
            }
        }
    }

    [System.Serializable]
    public sealed class Melee : GunState
    {
        public override void Initialize()
        {
            base.Initialize();
            root.animator[0].onStateExit += OnAnimationStateExit;
        }

        private void OnAnimationStateExit(string obj)
        {
            if (Enabled is false) return;
            if (obj is BITConstant.Player.Melee)
            {
                root.TransitionState<Movement>();
            }
        }
        public override void OnStateEntry(IState old)
        {
            root.animator.Play(BITConstant.Player.Melee);
            _entityMovement.ExecuteCommand(new PlayerDisableRunCommand(this));
        }

        public override void OnStateExit(IState old, IState newState)
        {
            _entityMovement.ExecuteCommand(new PlayerEnableRunCommand(this));
        }

        public override void OnStateUpdate(float deltaTime)
        {
            _entityMovement.ExecuteCommand<PlayerCancelRunCommand>();
        }
        public override void OnMovementStateChanged(IEntityMovementState old, IEntityMovementState newState)
        {
            if (Enabled is false) return;
            if (newState is IPlayerRunState or IPlayerSprintState)
            {
                root.TransitionState<Movement>();
            }
        }
    }

    [System.Serializable]
    public sealed class Climb:GunState
    {
        public override void OnStateEntry(IState old)
        {
            root.animator.Play(BITConstant.Player.Climb);
        }

        public override void OnMovementStateChanged(IEntityMovementState old, IEntityMovementState newState)
        {
          if(newState is IPlayerClimbState || (newState is IPlayerLinkState linkState && linkState.LinkArea == 4) )
          {
              root.TransitionState<Climb>();
          }else if (Enabled)
          {
              root.TransitionState<Movement>();
          }
        }
    }

    [System.Serializable]
    public sealed class Holster : GunState
    {
        public override void OnStateEntry(IState old)
        {
            root.animator.CrossFade(BITConstant.Player.Holster,0.16f);
        }
    }
}