Update chat/rag_engine.py

chat/rag_engine.py

@@ -342,10 +342,11 @@ import os
 
 # Add the project root to Python path
 current_dir = os.path.dirname(os.path.abspath(__file__))
-parent_dir = os.path.dirname(current_dir)  # This goes from chat/ to MedSearchPro/
+project_root = os.path.dirname(current_dir)  # This goes from chat/ to MedSearchPro/
 
-if parent_dir not in sys.path:
-    sys.path.insert(0, parent_dir)
+if project_root not in sys.path:
+    sys.path.insert(0, project_root)
+    print(f"✅ Added project root to sys.path: {project_root}")
 
 
 # Import existing modules
@@ -360,6 +361,15 @@ try:
 except ImportError as e:
     print(f"⚠️  Some dependencies not found - using simplified mode: {e}")
 
+    # Set fallback values for all imported modules
+    VectorStore = None
+    MultiDocumentSummarizer = None
+    SinglePaperSummarizer = None
+    CrossPaperComparator = None
+    ResearchGapAnalyzer = None
+    ConversationMemory = None
+    GrokLLM = None
+
 # Import config for domain mapping
 try:
     from config.domains import (
@@ -1140,6 +1150,22 @@ class EnhancedRAGEngine:
             print("⚠️  Using fallback mode - will generate demo papers")
             self.RESEARCH_ENGINE_AVAILABLE = False
 
+        #  Initialize LLM - FIXED IMPORT
+        try: 
+            # Ensure we can import from llm directory
+            import sys
+            import os
+            
+            # Get the project root (MedSearchPro/
+            current_dir = os.path.dirname(os.path.abspath(__file__))  # /MedSearchPro/chat/
+            project_root = os.path.dirname(current_dir)
+
+            if project_root not in sys.path:
+                sys.path.insert(0, project_root)
+
+            # Now importing GrokLLM
+            from llm.llm_provider import GrokLLM
+
         # Initialize components
         try:
             self.llm = GrokLLM(model=self.model)