Retain overlay windows through partial IPC failures and guarded service startup

tools/chatgui-android/app/src/main/java/com/utun/chat/data/RadioOverlayService.kt

@@ -279,80 +279,99 @@ class RadioOverlayService : Service() {
     override fun onBind(intent: Intent?): IBinder? = null
 
     override fun onCreate() {
+        checkMain()
         super.onCreate()
-        LogManager.addLog("DEBUG", "RADIO_DBG", "RadioOverlayService.onCreate thread=${Thread.currentThread().name} t=${System.currentTimeMillis()}")
-        createChannel()
+        var operation = "channel"
         try {
+            createChannel()
+            operation = "foreground"
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
                 ServiceCompat.startForeground(this, NOTIF_ID, buildNotification(),
                     ServiceInfo.FOREGROUND_SERVICE_TYPE_MICROPHONE)
             } else {
                 startForeground(NOTIF_ID, buildNotification())
             }
-        } catch (e: Exception) {
-            LogManager.addLog("ERROR", "RadioOverlay", "Foreground microphone start failed: $e")
-            starting = false
-            setStatus(R.string.microphone_service_failed)
-            stopSelf()
-            return
-        }
-
-        running = true
-        currentService = this
-        windowManager = getSystemService(WINDOW_SERVICE) as WindowManager
-        serviceScope.launch {
-            RadioAudioEngine.instance().talkingFlow.collect { updateButtonColor() }
-        }
-        starting = false
-        LogManager.addLog("INFO", "RadioOverlay", "Foreground microphone service ready")
-        RadioAudioEngine.instance().reconfigure()
-        serviceScope.launch {
-            while (isActive) {
-                delay(1000)
-                if (!MicrophonePermission.granted() ||
-                    (overlayView != null && !canDrawOverlays(this@RadioOverlayService))) sync(this@RadioOverlayService)
+            operation = "previous owner"
+            currentService?.takeIf { it !== this }?.let { previous ->
+                check(previous.destroyed && previous.removeOverlay()) { "previous overlay owner still retained" }
             }
-        }
-        if (pendingStop) {
+            currentService = this
+            running = true
+            starting = false
+            if (pendingStop) {
+                LogManager.addLog("INFO", "RadioOverlay", "Cancelled service start completed foreground handshake")
+                stopSelf(); return
+            }
+            operation = "window service"
+            windowManager = getSystemService(WINDOW_SERVICE) as? WindowManager ?: error("window manager unavailable")
+            serviceScope.launch { RadioAudioEngine.instance().talkingFlow.collect { updateButtonColor() } }
+            RadioAudioEngine.instance().reconfigure()
+            serviceScope.launch {
+                while (isActive) {
+                    delay(1000)
+                    if (!MicrophonePermission.granted() ||
+                        (overlayView != null && !canDrawOverlays(this@RadioOverlayService))) sync(this@RadioOverlayService)
+                }
+            }
+            LogManager.addLog("INFO", "RadioOverlay", "Foreground microphone service ready notification=$NOTIF_ID")
+        } catch (e: Exception) {
+            LogManager.addLog("ERROR", "RadioOverlay", "service setup failed operation=$operation: $e")
+            if (currentService == null) currentService = this
+            if (currentService === this) { starting = false; running = false; pendingStop = true }
+            setStatus(R.string.microphone_service_failed)
             stopSelf()
         }
     }
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        checkMain()
         refresh()
         return START_NOT_STICKY
     }
 
     private fun refresh() {
-        if (!running || pendingStop || !RadioAudioEngine.instance().isActive() || !MicrophonePermission.granted()) {
+        if (destroyed || currentService !== this || !running || pendingStop ||
+            !RadioAudioEngine.instance().isActive() || !MicrophonePermission.granted()) {
             removeOverlay()
+            if (currentService === this) pendingStop = true
             stopSelf()
             return
         }
         val provider = ChatApplication.instance.configProvider
         val wantOverlay = provider.getRadioOverlay() && canDrawOverlays(this)
+        if (overlayView != null && !overlayReady && !removeOverlay()) return
         if (wantOverlay && overlayView == null) {
             try { addOverlay() } catch (e: Exception) {
+                removeOverlay()
                 setStatus(R.string.overlay_show_failed)
                 LogManager.addLog("ERROR", "RadioOverlay", "Overlay creation failed: $e")
+                if (provider.getInt("radio.auto_enabled") == 0) { pendingStop = true; stopSelf() }
+                return
             }
         }
         if (!wantOverlay) removeOverlay()
-        if (overlayView != null) setStatus(R.string.overlay_active)
-        if (!wantOverlay && provider.getInt("radio.auto_enabled") == 0) stopSelf()
+        if (overlayReady) setStatus(R.string.overlay_active)
+        if (!wantOverlay && provider.getInt("radio.auto_enabled") == 0) { pendingStop = true; stopSelf() }
     }
 
-    private fun removeOverlay() {
-        val view = overlayView ?: return
+    /** Снять только свой PTT. Ссылка на окно сохраняется до успешного remove либо подтверждённого отсутствия. */
+    private fun removeOverlay(): Boolean {
         talking = false
-        RadioAudioEngine.instance().cancelTalk(RadioPttSource.OVERLAY)
-        try { windowManager?.removeView(view) } catch (e: Exception) {
-            LogManager.addLog("WARN", "RadioOverlay", "Overlay removal failed: $e")
+        overlayReady = false
+        positioningPending = false
+        if (currentService === this) RadioAudioEngine.instance().cancelTalk(RadioPttSource.OVERLAY)
+        val view = overlayView ?: return true
+        try { requireNotNull(windowManager) { "owned window without manager" }.removeView(view) } catch (e: IllegalArgumentException) {
+            LogManager.addLog("WARN", "RadioOverlay", "Overlay already absent view=${System.identityHashCode(view)}: $e")
+        } catch (e: Exception) {
+            LogManager.addLog("ERROR", "RadioOverlay", "Overlay removal failed view=${System.identityHashCode(view)}; retained for retry: $e")
+            return false
         }
         overlayView = null
         params = null
-        _isShown.value = false
-        LogManager.addLog("INFO", "RadioOverlay", "Overlay removed; transmission cancelled")
+        if (currentService === this) _isShown.value = false
+        LogManager.addLog("INFO", "RadioOverlay", "Overlay removed view=${System.identityHashCode(view)}; own transmission cancelled")
+        return true
     }
 
     private fun createChannel() {