Update app.py

app.py

@@ -2,9 +2,8 @@ import os
 from openai import OpenAI
 from shiny import App, render, ui, reactive
 
-# Clean, error-free layout framework
 app_ui = ui.page_fluid(
-    ui.h2("NexusAI Assistant"),
+    ui.h2("NexusAI Assistant (Debug Mode)"),
     ui.hr(),
     ui.input_text_area("user_prompt", "Enter your prompt below:", "What is the meaning of life?"),
     ui.input_action_button("submit_btn", "Send Query"),
@@ -15,51 +14,63 @@ app_ui = ui.page_fluid(
 
 def server(input, output, session):
     
-    # Asynchronous background thread to manage the network waiting time
     @reactive.extended_task
     async def fetch_ai_response(prompt_text):
         try:
+            # 1. Verify Hugging Face has access to your secret key configuration
+            api_key = os.environ.get("OPENROUTER_API_KEY")
+            if not api_key:
+                return {"status": "error", "content": "HF_SECRET_MISSING: Your OPENROUTER_API_KEY was not found in your Hugging Face Space Settings. Please check your Settings tab."}
+            
+            # 2. Initialize connection
             client = OpenAI(
-                base_url="https://openrouter.ai",
-                api_key=os.environ.get("OPENROUTER_API_KEY"),
+                base_url="https://openrouter.ai/api/v1",
+                api_key=api_key,
             )
             
+            # 3. Call Poolside Laguna XS.2
             completion = client.chat.completions.create(
                 extra_headers={
                     "HTTP-Referer": "https://huggingface.co",
                     "X-OpenRouter-Title": "NexusAI Shiny Dashboard",
                 },
-                model="poolside/laguna-xs.2:free",
+                model="poolside/laguna-xs.2:free", 
                 messages=[{"role": "user", "content": prompt_text}]
             )
             
-            # CORE FIX: Added [0] to extract the text from the first choice object array index
-            ai_text = completion.choices[0].message.content
-            return {"status": "success", "content": ai_text}
-            
+            # 4. Safely extract message from array index to prevent silent background freezing
+            if completion and hasattr(completion, 'choices') and len(completion.choices) > 0:
+                ai_text = completion.choices[0].message.content
+                return {"status": "success", "content": ai_text}
+            else:
+                return {"status": "error", "content": f"EMPTY_RESPONSE: OpenRouter payload did not contain choices. Raw data: {str(completion)}"}
+                
         except Exception as e:
-            return {"status": "error", "content": str(e)}
+            # Captures any network timeout or key authentication issues directly
+            return {"status": "error", "content": f"API_EXCEPTION: {str(e)}"}
 
-    # Listen for button triggers
     @reactive.effect
     @reactive.event(input.submit_btn)
     def _():
         fetch_ai_response.trigger(input.user_prompt())
 
-    # Safely swap display states without causing the web browser to hang
     @render.ui
     def ai_display_area():
         if fetch_ai_response.status() == "initial":
             return ui.p("System idle. Awaiting user input...")
             
         elif fetch_ai_response.status() == "running":
-            return ui.p("Analyzing sequence structures... Please wait.")
+            return ui.p("Connecting to OpenRouter and calling poolside/laguna-xs.2:free... Please wait.")
             
         elif fetch_ai_response.status() == "result":
             res = fetch_ai_response.result()
             if res["status"] == "success":
                 return ui.markdown(res["content"])
             else:
-                return ui.p(f"Connection Error: {res['content']}")
+                # Displays explicit errors on-screen instead of hanging
+                return ui.div(
+                    ui.h5("System Stopped", style="color: red;"),
+                    ui.p(res["content"], style="font-family: monospace; background-color: #ffe6e6; padding: 10px; border-radius: 5px; color: black;"),
+                )
 
-app = App(app_ui, server)
+app = App(app_ui, server)