cirnogodot/Scripts/Components/FSM/3DPlayer/IsoActivationProvider.cs

using Cirno.Scripts.Components.Actors;
using Cirno.Scripts.Interactables;
using Godot;

namespace Cirno.Scripts.Components.FSM._3DPlayer;

public partial class IsoActivationProvider: Area3D, IModule<PlayerState, CharacterBody3D> 
{
    
    private bool _enabled = false;

    public bool Enabled
    {
        get => _enabled;
        set
        {
            if (_enabled == value) return;
            _enabled = value;
        }
    }
    
    [Export] private InputProvider _inputProvider;
    [Export] private SelectorController _selectorController;

    [Export] private AudioStreamPlayer _errorSound;
    
    [Export] public PackedScene SelectorScene { get; set; }
    
    
    public IStateMachine<PlayerState, CharacterBody3D> StateMachine { get; private set; }
    
    public void EnterState(PlayerState state)
    {
        Enabled = true;
        AreaEntered += _on_interaction_controller_area_entered;
        AreaExited += _on_interaction_controller_area_exited;
    }

    public void ExitState(PlayerState state)
    {
        Enabled = false;
        AreaEntered -= _on_interaction_controller_area_entered;
        AreaExited -= _on_interaction_controller_area_exited;
    }

    public void Init(IStateMachine<PlayerState, CharacterBody3D> machine)
    {
        StateMachine = machine;
        
        _selectorController.Hide();
        
       SpawnSelector();
        
        // if (SelectorScene is not null && _selector is null)
        // {
        //     _selector = actor.CreateSibling<Selector>(SelectorScene, this.GlobalPosition);
        //     _selector.Visible = false;
        // }
    }

    private void SpawnSelector()
    {
        var sel = SelectorScene.Instantiate<Node3D>();
        StateMachine.MainObject.GetParent().AddChild(sel);
        sel.GlobalPosition = StateMachine.MainObject.GlobalPosition;

        _selectorController.ShowSelector += () =>
        {
            sel.Show();
        };

        _selectorController.HideSelector += () =>
        {
            sel.Reparent(this);
            sel.Hide();
        };

        _selectorController.ChangeParent3D += parent =>
        {
            if (parent is not null)
            {
                sel.Reparent(parent);
            }
            else
            {
                sel.Reparent(this);
                sel.Hide();
            }

            sel.Position = Vector3.Zero;
        };
        // if (Hud.Instance is not null)
        // {
        //     Hud.Instance.CreateSelector(_selectorController);
        // }
    }

    public void Process(double delta)
    {

    }

    public void PhysicsProcess(double delta)
    {
        //_selectorController.PhysicsProcess(delta);
        
        HandleInteraction();
    }

    public void HandleInteraction()
    {
        if (_inputProvider.GetUseJustPressed())
        {
            if (!TrySelect())
            {
                _selectorController.SelectNext();
            }

            return;
        }

        if (_inputProvider.GetScanJustPressed())
        {
            _selectorController.SelectNext();
        }
    }

    private bool TrySelect()
    {
        var selected = _selectorController.SelectedInteractable;
        if (selected is null)
        {
            _errorSound?.Play();
            return false;
        };
        if (!selected.CanActivate())
        {
            _errorSound?.Play();
            return true;
        };
        bool success = selected.Activate(ActivationType.Use);

        if (success)
        {
            // Deselect and scan for next
            _selectorController.RemoveInteractable(selected);
            _selectorController.SelectNext();
            //_selector.RemoveInteractable(selected);
        }
        else
        {
            _errorSound?.Play();
        }

        return true;
        //var spaceState = GetWorld2D().DirectSpaceState;

        //var query = PhysicsRayQueryParameters2D.Create(Vector2.Zero, )
    }
    
    private void _on_interaction_controller_area_entered(Area3D area)
    {
        if (!Enabled) return;
        if (area.IsInGroup("Interactable") && area is IInteractable interactable && interactable.CanActivate())
        {

            //if (_selector == null) return;

            _selectorController.AddInteractable(interactable);
        }
    }
    
    private void _on_interaction_controller_area_exited(Area3D area)
    {
        //if (!Enabled) return;
        if (area.IsInGroup("Interactable") && area is IInteractable interactable)
        {

            //if (_selector == null) return;
            _selectorController.RemoveInteractable(interactable);
        }
    }
}