using System;
using Code.Infrastructure.Camera;
using Code.Infrastructure.Camera.CameraStates;
using Code.Infrastructure.Input;
using Cysharp.Threading.Tasks;
using UnityEngine;
using UnityEngine.InputSystem;

namespace Code.Game.OfficeGame.BattleMode
{
    [Infrastructure.Generators.State(typeof(CameraMode), typeof(CameraStateMachineContext), ManualInherit = true)]
    public partial class CameraBattleModeState : BaseCameraState
    {
        private Vector3 _rotationOffset = new(30f, 0, 0);
        private int _cameraZoneMask = LayerMask.GetMask("CameraZone");

        public CameraBattleModeState(CameraStateMachineContext context) : base(context)
        {
        }
        public override CameraMode MyState => CameraMode.BattleMode;
        public override UniTask EnterState()
        {
            Context.InputService.BindActionPerformed(
                (int)ActionMappings.BattleMode,
                (int)BattleModeActions.Movement,
                SetMovement);
            Context.InputService.BindActionCancelled(
                (int)ActionMappings.BattleMode,
                (int)BattleModeActions.Movement,
                ResetMovement);
            return UniTask.CompletedTask;
        }

        public override UniTask ExitState()
        {
            Context.InputService.UnbindActionPerformed(
                (int)ActionMappings.BattleMode, 
                (int)BattleModeActions.Movement, 
                SetMovement);
            Context.InputService.UnbindActionCancelled(
                (int)ActionMappings.BattleMode,
                (int)BattleModeActions.Movement,
                ResetMovement);
            return UniTask.CompletedTask;
        }

        private Vector2 _movement;
        private float _speed = 5f; // ToConf
        private void SetMovement(InputAction.CallbackContext obj)
        {
            _movement = obj.ReadValue<Vector2>();
        }

        private void ResetMovement(InputAction.CallbackContext obj)
        {
            _movement = Vector2.zero;
        }

        public override void Update()
        {
            
        }

        private const float ZoneSearchRadius = 3f;
        private static readonly Collider[] _zoneBuffer = new Collider[8];

        public override void LateUpdate()
        {
            var camTransform = Context.cameraLoadedData.Camera.transform;
            var desired = camTransform.position 
                          + new Vector3(_movement.x, 0 , _movement.y) * (Time.deltaTime * _speed);

            int count = Physics.OverlapSphereNonAlloc(
                camTransform.position,
                ZoneSearchRadius,
                _zoneBuffer,
                _cameraZoneMask,
                QueryTriggerInteraction.Collide);

            if (count == 0)
            {
                if (Physics.CheckSphere(desired, 0.01f, _cameraZoneMask, QueryTriggerInteraction.Collide))
                    camTransform.position = desired;
                return;
            }

            var best = camTransform.position;
            var bestSqr = float.MaxValue;

            for (int i = 0; i < count; i++)
            {
                var p = _zoneBuffer[i].ClosestPoint(desired);
                var sqr = (p - desired).sqrMagnitude;
                if (sqr < bestSqr)
                {
                    bestSqr = sqr;
                    best = p;
                }
            }

            camTransform.position = best;
        }
    }
}