Enhance: Update Google Play Games integration and versioning

- Incremented version code to 5 and version name to 0.4 in build.gradle.
- Removed Google Play sign-in buttons from both portrait and landscape layouts.
- Updated HighScoresActivity to hide the leaderboard button.
- Improved score submission process in GooglePlayGamesManager with forced sign-in and user feedback.
- Enhanced MainActivity to submit scores to Google Play Games upon game over.

app/build.gradle

@@ -11,8 +11,8 @@ android {
         applicationId "com.pixelmintdrop"
         minSdk 30
         targetSdk 35
-        versionCode 3
-        versionName "0.2"
+        versionCode 5
+        versionName "0.4"
         
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }

app/src/main/java/com/pixelmintdrop/HighScoresActivity.kt

@@ -76,10 +76,8 @@ class HighScoresActivity : AppCompatActivity() {
                 finish()
             }
             
-            // Set up leaderboard button
-            binding.leaderboardButton?.setOnClickListener {
-                showGlobalLeaderboard()
-            }
+            // Hide the leaderboard button
+            binding.leaderboardButton?.visibility = View.GONE
         } catch (e: Exception) {
             Log.e("HighScoresActivity", "Error in onCreate", e)
             // Show an error message if necessary, or finish gracefully
@@ -118,7 +116,6 @@ class HighScoresActivity : AppCompatActivity() {
     
             // Apply theme to buttons
             binding.backButton.setTextColor(textColor)
-            binding.leaderboardButton?.setTextColor(textColor)
     
             // Update adapter theme
             highScoreAdapter.applyTheme(themeId)

app/src/main/java/com/pixelmintdrop/MainActivity.kt

@@ -473,6 +473,10 @@ class MainActivity : AppCompatActivity(),
             Log.d(TAG, "[GameOverDebug]   Triples: $lastSessionTriples (from manager: ${statsManager.getSessionTriples()})")
             Log.d(TAG, "[GameOverDebug]   Quads: $lastSessionQuads (from manager: ${statsManager.getSessionQuads()})")
 
+            // *** Submit score to Google Play Games ***
+            Log.d(TAG, "Attempting to submit end-game score to Play Games: $lastSessionScore")
+            highScoreManager.getGooglePlayGamesManager().submitScore(lastSessionScore.toLong(), this@MainActivity)
+
             // End the session (updates lifetime stats)
             statsManager.endSession()
 
@@ -1077,6 +1081,10 @@ class MainActivity : AppCompatActivity(),
             Log.d(TAG, "[GameOverDebug]   Triples: $lastSessionTriples (from manager: ${statsManager.getSessionTriples()})")
             Log.d(TAG, "[GameOverDebug]   Quads: $lastSessionQuads (from manager: ${statsManager.getSessionQuads()})")
 
+            // *** Submit score to Google Play Games ***
+            Log.d(TAG, "Attempting to submit end-game score to Play Games: $lastSessionScore")
+            highScoreManager.getGooglePlayGamesManager().submitScore(lastSessionScore.toLong(), this@MainActivity)
+
             // End the session (updates lifetime stats)
             statsManager.endSession()
 
@@ -2243,20 +2251,24 @@ class MainActivity : AppCompatActivity(),
      * Handles sign-in to Google Play Games Services
      */
     private fun signInToPlayGames() {
+        Log.d(TAG, "Attempting to sign into Google Play Games")
         gamesSignInClient.isAuthenticated.addOnCompleteListener { task ->
             val isAuthenticated = task.isSuccessful && task.result.isAuthenticated
             
             if (!isAuthenticated) {
-                // Silent sign-in failed, offer to sign in explicitly
-                Log.d(TAG, "Not authenticated with Play Games, will prompt user later")
+                // Silent sign-in failed, but don't prompt right away
+                Log.d(TAG, "Not authenticated with Play Games, will prompt for sign-in when needed")
                 
-                // We don't show UI for this immediately, we'll add a button to the pause menu
+                // Optional: Add a sign-in button to your menu or UI for manual sign-in
+                // We'll attempt sign-in when accessing leaderboards or submitting scores
             } else {
                 Log.d(TAG, "Already authenticated with Play Games")
                 
                 // If we were already authenticated, make sure scores are synced
                 val lastHighScore = highScoreManager.getHighScores().maxByOrNull { it.score }
                 lastHighScore?.let {
+                    // Submit the high score if we're already authenticated
+                    Log.d(TAG, "User is signed in, submitting last high score: ${it.score}")
                     highScoreManager.getGooglePlayGamesManager().submitScore(it.score.toLong(), this)
                 }
             }

app/src/main/java/com/pixelmintdrop/model/GooglePlayGamesManager.kt

@@ -62,18 +62,48 @@ class GooglePlayGamesManager(private val context: Context) {
     
     // Submit score to leaderboard (requires an activity for potential sign-in)
     fun submitScore(score: Long, activity: Activity? = null) {
-        val account = GoogleSignIn.getLastSignedInAccount(context)
-        if (account == null) {
-            Log.w(TAG, "Not signed in, score will not be submitted to Google Play Games")
+        if (activity == null) {
+            Log.w(TAG, "Activity context is required for score submission.")
             return
         }
+
+        Log.d(TAG, "Attempting to submit score: $score")
         
-        try {
-            val leaderboardsClient = PlayGames.getLeaderboardsClient(activity ?: return)
-            leaderboardsClient.submitScore(LEADERBOARD_ID, score)
-            Log.d(TAG, "Score $score submitted to leaderboard $LEADERBOARD_ID")
-        } catch (e: Exception) {
-            Log.e(TAG, "Error submitting score to leaderboard", e)
+        // Always force a sign-in to ensure we have a valid account
+        val signInClient = PlayGames.getGamesSignInClient(activity)
+        signInClient.signIn().addOnCompleteListener { signInTask ->
+            if (signInTask.isSuccessful) {
+                Log.d(TAG, "Sign-in successful, retrieving account for score submission")
+                
+                // After sign-in, get the account and submit score
+                try {
+                    // Use PlayGames API directly to get client and submit score
+                    val leaderboardsClient = PlayGames.getLeaderboardsClient(activity)
+                    leaderboardsClient.submitScore(LEADERBOARD_ID, score)
+                    Log.d(TAG, "Successfully submitted score $score to leaderboard $LEADERBOARD_ID")
+                    
+                    // Show confirmation to user
+                    android.widget.Toast.makeText(
+                        activity,
+                        "Score submitted to leaderboard",
+                        android.widget.Toast.LENGTH_SHORT
+                    ).show()
+                } catch (e: Exception) {
+                    Log.e(TAG, "Error submitting score after sign-in", e)
+                    android.widget.Toast.makeText(
+                        activity,
+                        "Failed to submit score to leaderboard",
+                        android.widget.Toast.LENGTH_SHORT
+                    ).show()
+                }
+            } else {
+                Log.e(TAG, "Sign-in failed, unable to submit score", signInTask.exception)
+                android.widget.Toast.makeText(
+                    activity,
+                    "Sign-in required to submit score to leaderboard",
+                    android.widget.Toast.LENGTH_SHORT
+                ).show()
+            }
         }
     }
     
@@ -81,20 +111,50 @@ class GooglePlayGamesManager(private val context: Context) {
     fun showLeaderboard(activity: Activity, listener: LeaderboardIntentListener) {
         Log.d(TAG, "showLeaderboard called in GooglePlayGamesManager")
         
-        Log.d(TAG, "Attempting to get LeaderboardsClient (assuming user is signed in)")
+        // First check if already authenticated
+        PlayGames.getGamesSignInClient(activity).isAuthenticated.addOnCompleteListener { authTask ->
+            val isAuthenticated = authTask.isSuccessful && authTask.result.isAuthenticated
+            
+            if (isAuthenticated) {
+                // Already authenticated, get leaderboard
+                getLeaderboardIntent(activity, listener)
+            } else {
+                // Need to authenticate first
+                Log.d(TAG, "User not authenticated for leaderboard, attempting sign-in")
+                PlayGames.getGamesSignInClient(activity).signIn().addOnCompleteListener { signInTask ->
+                    if (signInTask.isSuccessful) {
+                        // Successfully signed in, now get leaderboard
+                        Log.d(TAG, "Sign-in successful, getting leaderboard")
+                        getLeaderboardIntent(activity, listener)
+                    } else {
+                        // Failed to sign in
+                        Log.e(TAG, "Failed to sign in for leaderboard access", signInTask.exception)
+                        listener.onLeaderboardIntentFailure(
+                            Exception("Sign-in required to view leaderboard", signInTask.exception)
+                        )
+                        
+                        // Inform user
+                        android.widget.Toast.makeText(
+                            activity,
+                            "Sign-in required to view leaderboard",
+                            android.widget.Toast.LENGTH_SHORT
+                        ).show()
+                    }
+                }
+            }
+        }
+    }
+    
+    // Private helper to get leaderboard intent
+    private fun getLeaderboardIntent(activity: Activity, listener: LeaderboardIntentListener) {
+        Log.d(TAG, "Attempting to get LeaderboardsClient")
         try {
             val leaderboardsClient = PlayGames.getLeaderboardsClient(activity)
             Log.d(TAG, "LeaderboardsClient obtained, attempting to get leaderboard intent for ID: $LEADERBOARD_ID")
             leaderboardsClient
                 .getLeaderboardIntent(LEADERBOARD_ID)
                 .addOnSuccessListener { intent ->
-                    Log.d(TAG, "Successfully obtained leaderboard intent. Calling listener.") 
-                    // try { // Removed - Activity start is now handled by MainActivity
-                    //     activity.startActivity(intent)
-                    //     Log.d(TAG, "Leaderboard activity started successfully.")
-                    // } catch (e: Exception) {
-                    //     Log.e(TAG, "Error starting leaderboard activity", e)
-                    // }
+                    Log.d(TAG, "Successfully obtained leaderboard intent. Calling listener.")
                     listener.onLeaderboardIntentSuccess(intent)
                 }
                 .addOnFailureListener { e ->
@@ -102,7 +162,7 @@ class GooglePlayGamesManager(private val context: Context) {
                     listener.onLeaderboardIntentFailure(e)
                 }
         } catch (e: Exception) {
-            Log.e(TAG, "Error obtaining LeaderboardsClient or getting leaderboard intent", e) // Updated log message
+            Log.e(TAG, "Error obtaining LeaderboardsClient or getting leaderboard intent", e)
             listener.onLeaderboardIntentFailure(e)
         }
     }

app/src/main/res/layout-land/activity_main.xml

@@ -452,20 +452,6 @@
                     android:textStyle="bold"
                     android:fontFamily="sans-serif"
                     android:textAllCaps="false" />
-                    
-                <!-- Google Play Sign In Button -->
-                <Button
-                    android:id="@+id/googlePlaySignInButton"
-                    android:layout_width="200dp"
-                    android:layout_height="wrap_content"
-                    android:layout_marginTop="8dp"
-                    android:background="@color/transparent"
-                    android:text="Sign in to Google Play"
-                    android:textColor="@color/white"
-                    android:textSize="20sp"
-                    android:textStyle="bold"
-                    android:fontFamily="sans-serif"
-                    android:textAllCaps="false" />
             </LinearLayout>
         </ScrollView>
     </LinearLayout>

app/src/main/res/layout/activity_main.xml

@@ -420,19 +420,6 @@
                     android:fontFamily="sans-serif"
                     android:textAllCaps="false" />
                     
-                <Button
-                    android:id="@+id/googlePlaySignInButton"
-                    android:layout_width="200dp"
-                    android:layout_height="wrap_content"
-                    android:layout_marginTop="16dp"
-                    android:background="@color/transparent"
-                    android:text="Sign in to Google Play"
-                    android:textColor="@color/white"
-                    android:textSize="24sp"
-                    android:textStyle="bold"
-                    android:fontFamily="sans-serif"
-                    android:textAllCaps="false" />
-        
                 <Button
                     android:id="@+id/statsButton"
                     android:layout_width="200dp"