Show "Waiting for opponent..." while you wait for the other player to choose whether to go first or keep their first hand

forge-ai/src/main/java/forge/ai/PlayerControllerAi.java

@@ -872,4 +872,13 @@ public class PlayerControllerAi extends PlayerController {
     public void autoPassCancel() {
         // Do nothing
     }
+
+    @Override
+    public void awaitNextInput() {
+        // Do nothing
+    }
+    @Override
+    public void cancelAwaitNextInput() {
+        // Do nothing
+    }
 }

forge-game/src/main/java/forge/game/GameAction.java

@@ -1486,6 +1486,11 @@ public class GameAction {
             goesFirst = game.getPlayers().get(0); // does not really matter who plays first - it's controlled from the same computer.
         }
 
+        for (Player p : game.getPlayers()) {
+            if (p != goesFirst) {
+                p.getController().awaitNextInput(); //show "Waiting for opponent..." while first player chooses whether to go first or keep their hand
+            }
+        }
         goesFirst = goesFirst.getController().chooseStartingPlayer(isFirstGame);
         return goesFirst;
     }

forge-game/src/main/java/forge/game/player/PlayerController.java

@@ -229,6 +229,10 @@ public abstract class PlayerController {
 
     public abstract void autoPassCancel();
 
+    public abstract void awaitNextInput();
+
+    public abstract void cancelAwaitNextInput();
+
     public boolean isGuiPlayer() {
         return false;
     }

forge-gui-desktop/src/test/java/forge/gamesimulationtests/util/PlayerControllerForTests.java

@@ -659,4 +659,13 @@ public class PlayerControllerForTests extends PlayerController {
     public void autoPassCancel() {
         // Not used by the controller for tests
     }
+
+    @Override
+    public void awaitNextInput() {
+        // Not used by the controller for tests
+    }
+    @Override
+    public void cancelAwaitNextInput() {
+        // Not used by the controller for tests
+    }
 }

forge-gui/src/main/java/forge/player/PlayerControllerHuman.java

@@ -1813,9 +1813,11 @@ public class PlayerControllerHuman
     public void autoPassCancel() {
         getGui().autoPassCancel(getLocalPlayerView());
     }
+    @Override
     public void awaitNextInput() {
         getGui().awaitNextInput();
     }
+    @Override
     public void cancelAwaitNextInput() {
         getGui().cancelAwaitNextInput();
     }