Update frontend.py

frontend.py

@@ -71,7 +71,17 @@ if "enable_audio" not in st.session_state:
 
 # Azure TTS function
 def azure_speak(text, lang='en-US'):
+    import os
+    if "HF_SPACE_ID" in os.environ:
+        st.warning("Azure TTS is not supported on Hugging Face Spaces. Using fallback TTS.")
+        return None
+
+    if st.session_state.tts_usage_count > 20:
+        st.warning("🔇 TTS usage limit reached.")
+        return None
+
     try:
+        import azure.cognitiveservices.speech as speechsdk
         speech_config = speechsdk.SpeechConfig(
             subscription=st.secrets["AZURE_SPEECH_KEY"],
             region=st.secrets["AZURE_REGION"]
@@ -81,17 +91,18 @@ def azure_speak(text, lang='en-US'):
             audio_config = speechsdk.audio.AudioOutputConfig(filename=tmpfile.name)
             synthesizer = speechsdk.SpeechSynthesizer(speech_config, audio_config)
             result = synthesizer.speak_text_async(text).get()
-            if result.reason == speechsdk.ResultReason.SynthesizingAudioCompleted:
-                st.session_state.tts_usage_count += 1
-                return tmpfile.name
-            else:
-                st.error("Speech synthesis failed.")
-                return None
+        if result.reason == speechsdk.ResultReason.SynthesizingAudioCompleted:
+            st.session_state.tts_usage_count += 1
+            return tmpfile.name
+        else:
+            st.error("❌ Azure TTS failed.")
+            return None
     except Exception as e:
         st.error(f"Azure TTS error: {e}")
         return None
 
 
+
 tab1, tab2 = st.tabs(["🧠 Analyze Review", "📚 Bulk Reviews"])
 
 # === SINGLE REVIEW ANALYSIS ===