Initial HUD implementation and timer + game over

Source/MyProject3/SpaceShooterGameMode.cpp

@@ -41,6 +41,10 @@ ASpaceShooterGameMode::ASpaceShooterGameMode()
     {
         GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Yellow, TEXT("GameMode Constructor"));
     }
+
+    KillCount = 0;
+    bIsGameOver = false;
+    RemainingTime = GameDuration;
 }
 
 void ASpaceShooterGameMode::StartPlay()
@@ -60,6 +64,9 @@ void ASpaceShooterGameMode::StartPlay()
     {
         GEngine->AddOnScreenDebugMessage(-1, 5.f, FColor::Green, TEXT("GameMode StartPlay"));
     }
+
+    RemainingTime = GameDuration;
+    GetWorldTimerManager().SetTimer(GameTimerHandle, this, &ASpaceShooterGameMode::UpdateGameTimer, 1.0f, true);
 }
 
 void ASpaceShooterGameMode::Tick(float DeltaTime)
@@ -567,4 +574,48 @@ FVector ASpaceShooterGameMode::EnsureMinimumSpawnDistance(const FVector& Propose
     // Otherwise, extend the vector to meet the minimum distance
     Direction.Normalize();
     return PlayerLocation + Direction * MinimumSpawnDistance;
+}
+
+void ASpaceShooterGameMode::UpdateGameTimer()
+{
+    if (bIsGameOver) return;
+
+    RemainingTime -= 1.0f;
+
+    if (RemainingTime <= 0.0f)
+    {
+        EndGame();
+    }
+}
+
+void ASpaceShooterGameMode::EndGame()
+{
+    bIsGameOver = true;
+
+    // Stop enemy spawning
+    GetWorldTimerManager().ClearTimer(EnemySpawnTimer);
+
+    // Clear existing enemies
+    TArray<AActor*> FoundEnemies;
+    UGameplayStatics::GetAllActorsOfClass(GetWorld(), AEnemySpaceship::StaticClass(), FoundEnemies);
+    for (AActor* Enemy : FoundEnemies)
+    {
+        Enemy->Destroy();
+    }
+
+    // Pause the game
+    UGameplayStatics::SetGamePaused(GetWorld(), true);
+}
+
+void ASpaceShooterGameMode::IncrementKillCount()
+{
+    if (!bIsGameOver)
+    {
+        KillCount++;
+    }
+}
+
+void ASpaceShooterGameMode::RestartGame()
+{
+    UGameplayStatics::OpenLevel(this, FName(*GetWorld()->GetName()), false);
 }