Enemy state machine

Scripts/Components/FSM/Enemy/PlayerDetectionModule.cs

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+using Cirno.Scripts.Enums;
+using Godot;
+using Godot.Collections;
+
+namespace Cirno.Scripts.Components.FSM.Enemy;
+
+public partial class PlayerDetectionModule : Area2D
+{
+    [Signal]
+    public delegate void PlayerInRangeEventHandler();
+    
+    [Signal]
+    public delegate void PlayerOutOfRangeEventHandler();
+    
+    [Export(PropertyHint.Layers2DPhysics)]
+    public uint ObstaclesCollisionMask { get; private set; }
+    
+    public Vector2? LastKnownPlayerPosition { get; private set; }
+    
+    //public bool PlayerInActiveArea { get; private set; }
+    private CollisionShape2D _collisionShape2D;
+    public override void _Ready()
+    {
+        
+    }
+    
+    public void SetRange(float range)
+    {
+        _collisionShape2D ??= this.GetNode<CollisionShape2D>("CollisionShape2D");
+        if (_collisionShape2D.Shape is CircleShape2D shape2D)
+        {
+            shape2D.Radius = range;
+        }
+    }
+    
+    public bool IsPlayerInRange(float range)
+    {
+        if (!GameManager.Instance?.PlayerPosition.HasValue ?? false)
+        {
+            return false;
+        }
+        
+        return this.GlobalPosition.DistanceTo(GameManager.Instance.PlayerPosition.Value) < range;
+    }
+    
+    public bool IsPlayerInSight()
+    {
+        //if (_cachedPlayer == null) return false;
+        if (!GameManager.Instance?.PlayerPosition.HasValue ?? false) return false;
+        
+        var spaceState = GetWorld2D().DirectSpaceState;
+        
+        // It needs to use its own collision mask because it's detecting obstacles rather than the player
+        var query = PhysicsRayQueryParameters2D.Create(this.GlobalPosition, GameManager.Instance.PlayerPosition.Value, ObstaclesCollisionMask,
+            [GetRid()]);
+        //query.CollideWithBodies = true;
+        //query.CollideWithAreas = true;
+        // var query = PhysicsRayQueryParameters2D.Create(this.GlobalPosition, _cachedPlayer.GlobalPosition, CollisionMask, new Array<Rid> { GetRid() });
+        var result = spaceState.IntersectRay(query);
+
+        // If count is 0 then the player is in sight, otherwise there is level geometry in the way
+        var found = result.Count == 0;
+        if (found)
+        {
+            LastKnownPlayerPosition = GameManager.Instance.PlayerPosition;
+        }
+        return found;
+    }
+    
+    private void _on_area_entered(Area2D area)
+    {
+        if (area is not InteractionController player) return;
+        EmitSignal(SignalName.PlayerInRange);
+        //PlayerInActiveArea = true;
+    }
+
+    private void _on_area_exited(Area2D area)
+    {
+        if (area is not InteractionController player) return;
+        EmitSignal(SignalName.PlayerOutOfRange);
+        //PlayerInActiveArea = false;
+    }
+}