Enemy state machine

Scripts/Components/FSM/Enemy/Idle.cs

@@ -0,0 +1,102 @@
+using Cirno.Scripts.Components.Actors;
+using Cirno.Scripts.Enums;
+using Godot;
+
+namespace Cirno.Scripts.Components.FSM.Enemy;
+
+public partial class Idle : EnemyStateBase
+{
+    public override EnemyState StateId => EnemyState.Idle;
+    
+    // Scan for player, move to alert if found
+    // Receive damage, move to alert if received
+    
+    [Export]
+    public EnemyStorageModule StorageModule { get; private set; }
+    
+    [Export]
+    public PlayerDetectionModule PlayerDetection { get; private set; }
+    
+    [Export]
+    public GenericDamageReceiver DamageReceiver { get; private set; }
+
+    // public override void Init(IStateMachine<EnemyState, CharacterBody2D> machine)
+    // {
+    //     base.Init(machine);
+    // } 
+    private bool _isPlayerInRange = false;
+    
+    public override void EnterState()
+    {
+        base.EnterState();
+        GD.Print("Entered Idle");
+        PlayerDetection.SetRange(StorageModule.Root.EnemyResource.PlayerDetectionRange);
+        
+        _isPlayerInRange = PlayerDetection.IsPlayerInRange(StorageModule.Root.EnemyResource.PlayerDetectionRange);
+        
+        PlayerDetection.PlayerInRange += PlayerDetectionOnPlayerInRange;
+        
+        PlayerDetection.PlayerOutOfRange += PlayerDetectionOnPlayerOutOfRange;
+
+        DamageReceiver.ChangeState(true);
+        
+        DamageReceiver.HealthProvider.ResourceDepleted += HealthProviderOnResourceDepleted;
+        
+        DamageReceiver.HealthProvider.ResourceDecreased += HealthProviderOnResourceDecreased;
+    }
+
+    private void HealthProviderOnResourceDecreased(float oldvalue, float newvalue, float maxvalue)
+    {
+        ChangeState(EnemyState.Alert);
+    }
+
+    private void HealthProviderOnResourceDepleted()
+    {
+        ChangeState(EnemyState.Dead);
+    }
+
+    private void PlayerDetectionOnPlayerOutOfRange()
+    {
+        _isPlayerInRange = false;
+        GD.Print("Player out of range");
+    }
+
+    public override void ExitState()
+    {
+        base.ExitState();
+        GD.Print("Exited Idle");
+        PlayerDetection.PlayerInRange -= PlayerDetectionOnPlayerInRange;
+        
+        PlayerDetection.PlayerOutOfRange -= PlayerDetectionOnPlayerOutOfRange;
+        
+        DamageReceiver.HealthProvider.ResourceDepleted -= HealthProviderOnResourceDepleted;
+        
+        DamageReceiver.HealthProvider.ResourceDecreased -= HealthProviderOnResourceDecreased;
+        DamageReceiver.ChangeState(false);
+        
+    }
+
+    private void PlayerDetectionOnPlayerInRange()
+    {
+        _isPlayerInRange = true;
+        GD.Print("Player In Range");
+    }
+
+    public override void PhysicsProcessState(double delta)
+    {
+        base.PhysicsProcessState(delta);
+        if (_isPlayerInRange)
+        {
+            if (PlayerDetection.IsPlayerInSight())
+            {
+                StateMachine.SetState(EnemyState.Alert);
+            }
+        }
+    }
+
+    public override void ProcessState(double delta)
+    {
+        base.ProcessState(delta);
+    }
+    
+}