Add debug foundation

godot/scripts/debug/DebugOverlay.cs

@@ -1,6 +1,8 @@
 #nullable enable
 
+using System.Globalization;
 using Godot;
+using SideScrollerGame.Debug.Commands;
 
 namespace SideScrollerGame.Debug;
 
@@ -15,10 +17,34 @@ public partial class DebugOverlay : CanvasLayer
 
     public void SetStatus(DebugSettings settings, string loadedSceneId)
     {
+        m_Settings = settings;
+        m_LoadedSceneId = loadedSceneId;
         Label label = EnsureLabel();
         label.Text = $"Debug boot: {settings.BootMode}\nSeed: {settings.Seed}\nScene: {loadedSceneId}\nDebug: {OS.IsDebugBuild()}";
     }
 
+    public void Bind(DebugCommandService service, DebugSettings settings, string loadedSceneId)
+    {
+        m_Service = service;
+        m_Settings = settings;
+        m_LoadedSceneId = loadedSceneId;
+        service.StateChanged += _ => Refresh();
+        Refresh();
+    }
+
+    private void Refresh()
+    {
+        Label label = EnsureLabel();
+        if (m_Service is null || m_Settings is null)
+        {
+            return;
+        }
+
+        DebugRuntimeState state = m_Service.State;
+        Visible = state.OverlayVisible;
+        label.Text = $"Debug boot: {m_Settings.BootMode}\n" + $"Scene: {m_LoadedSceneId}\n" + $"Seed: {state.Seed}\n" + $"Difficulty: {state.ActiveDifficultyId}\n" + $"Paused: {state.IsPaused}\n" + $"Time scale: {state.TimeScale.ToString(CultureInfo.InvariantCulture)}\n" + $"Marker: {DisplayOrNone(state.CurrentMarkerId)}\n" + $"Spawned: {state.SpawnedActorCount} ({DisplayOrNone(state.LastSpawnedActorId)})\n" + $"Flags: invuln={state.Invulnerable}, ammo={state.InfiniteSpecialAmmo}, nofire={state.NoEnemyFire}\n" + $"Debug draw: collisions={state.ShowCollisionShapes}, bounds={state.ShowGameplayBounds}";
+    }
+
     private Label EnsureLabel()
     {
         if (m_StatusLabel is not null)
@@ -39,5 +65,13 @@ public partial class DebugOverlay : CanvasLayer
         return m_StatusLabel;
     }
 
+    private static string DisplayOrNone(string value)
+    {
+        return string.IsNullOrWhiteSpace(value) ? "none" : value;
+    }
+
     private Label? m_StatusLabel;
+    private DebugCommandService? m_Service;
+    private DebugSettings? m_Settings;
+    private string m_LoadedSceneId = "none";
 }