fixed pdf upload not working

app.py

@@ -179,9 +179,11 @@ def extract_text_from_pdf(pdf_path):
         if not text_content.strip():
             return "Error: No selectable text found in PDF. Please ensure the PDF contains selectable text, not just images."
         
+        print(f"Successfully extracted {len(text_content)} characters from PDF")
         return text_content
         
     except Exception as e:
+        print(f"PDF extraction error: {str(e)}")
         return f"Error extracting text: {str(e)}"
 
 def extract_metadata(text):
@@ -320,23 +322,36 @@ def process_document(pdf_file):
         return "कृपया एक PDF फ़ाइल अपलोड करें।", "", "", gr.update(visible=False)
     
     try:
+        print(f"Processing uploaded file: {pdf_file.name}")
+        
         # Check file size
         file_size = os.path.getsize(pdf_file.name)
+        print(f"File size: {file_size} bytes")
+        
         if file_size > CONFIG['MAX_FILE_SIZE']:
             return f"फ़ाइल बहुत बड़ी है! अधिकतम आकार: {CONFIG['MAX_FILE_SIZE'] // (1024*1024)}MB", "", "", gr.update(visible=False)
         
         # Extract text (no OCR - assumes selectable text)
+        print("Extracting text from PDF...")
         text_content = extract_text_from_pdf(pdf_file.name)
         
-        if not text_content.strip() or "Error" in text_content:
+        # Check if extraction failed
+        if not text_content.strip():
+            return "Error: फ़ाइल से टेक्स्ट निकालने में असफल।", "", "", gr.update(visible=False)
+        
+        if text_content.startswith("Error"):
             return text_content, "", "", gr.update(visible=False)
         
+        print(f"Text extraction successful. Length: {len(text_content)} characters")
+        
         # Extract metadata
+        print("Extracting metadata...")
         author_name, book_title = extract_metadata(text_content)
         SESSION_DATA['author_name'] = author_name
         SESSION_DATA['book_title'] = book_title
         
         # Create chunks
+        print("Creating text chunks...")
         chunks = chunk_text(text_content)
         SESSION_DATA['document_chunks'] = chunks
         
@@ -351,6 +366,8 @@ def process_document(pdf_file):
         word_count = len(text_content.split())
         char_count = len(text_content)
         
+        print(f"Processing complete. Chunks: {len(chunks)}, Words: {word_count}")
+        
         success_msg = f"""✅ दस्तावेज़ सफलतापूर्वक प्रसंस्करित!
 
 📖 पुस्तक: {book_title}
@@ -364,7 +381,9 @@ def process_document(pdf_file):
         return success_msg, book_title, author_name, gr.update(visible=True)
         
     except Exception as e:
-        return f"दस्तावेज़ प्रसंस्करण में त्रुटि: {str(e)}", "", "", gr.update(visible=False)
+        error_msg = f"दस्तावेज़ प्रसंस्करण में त्रुटि: {str(e)}"
+        print(f"Error in process_document: {str(e)}")
+        return error_msg, "", "", gr.update(visible=False)
 
 # Query processing function
 def process_query(audio_input, text_input):
@@ -770,6 +789,7 @@ def create_interface():
                 available_books = get_available_books()
                 gallery_data, book_options = create_book_gallery()
                 
+                # Always create these components, even if no books are available
                 if available_books:
                     book_gallery = gr.Gallery(
                         value=gallery_data,
@@ -792,6 +812,7 @@ def create_interface():
                     select_book_btn = gr.Button("📖 Load Selected Book / चुनी गई पुस्तक लोड करें", variant="primary")
                 else:
                     gr.Markdown("⚠️ No books available in library / पुस्तकालय में कोई पुस्तक उपलब्ध नहीं है")
+                    book_gallery = None
                     book_dropdown = gr.Dropdown(choices=["None"], value="None", visible=False)
                     select_book_btn = gr.Button("No books available", interactive=False)
             
@@ -871,28 +892,27 @@ def create_interface():
             outputs=[auth_section, main_section, auth_status]
         )
         
-        # Book selection event handler
-        if 'select_book_btn' in locals():
+        # PDF upload event handler - Always available
+        process_pdf_btn.click(
+            process_document,
+            inputs=[pdf_upload],
+            outputs=[doc_status, book_title_display, author_display, query_section]
+        )
+        
+        # Book selection event handler - Only if books are available
+        if available_books:
             select_book_btn.click(
                 process_selected_book,
                 inputs=[book_dropdown],
                 outputs=[doc_status, book_title_display, author_display, query_section]
             )
-        
-        # Gallery selection event handler
-        if 'book_gallery' in locals():
-            book_gallery.select(
-                handle_gallery_selection,
-                outputs=[book_dropdown]
-            )
-        
-        # PDF upload event handler  
-        if 'process_pdf_btn' in locals():
-            process_pdf_btn.click(
-                process_document,
-                inputs=[pdf_upload],
-                outputs=[doc_status, book_title_display, author_display, query_section]
-            )
+            
+            # Gallery selection event handler - Only if gallery exists
+            if book_gallery is not None:
+                book_gallery.select(
+                    handle_gallery_selection,
+                    outputs=[book_dropdown]
+                )
         
         ask_button.click(
             process_query,