refactored ai service

app/service/ai_service.py

@@ -1,11 +1,12 @@
-# app/service/ai_service.py
 import json
 import logging
 from app.deps import get_vector_db
-from app.service.llm_service import LocalLLMService
-from app.service.embedding_service import embedder
+from typing import TYPE_CHECKING  # ✅ For forward reference
 import time
 
+if TYPE_CHECKING:
+    from app.service.llm_service import LocalLLMService  # ✅ Type hint only
+
 logger = logging.getLogger(__name__)
 
 class AIService:
@@ -19,10 +20,27 @@ class AIService:
             self.vector_db = None
             self.vss_available = False
         
-        self.llm = llm_service
-        self.embedder = embedder
+        self._llm = None  # ✅ Lazy initialization
+        self._embedder = None  # ✅ FIXED: Use _embedder (not embedder)
         logger.info(f"✅ AI Service initialized (VSS: {'ENABLED' if self.vss_available else 'DISABLED'})")
     
+    @property
+    def llm(self) -> "LocalLLMService":
+        """Lazy property to get LLM service (avoids circular import)"""
+        if self._llm is None:
+            from app.service.llm_service import get_llm_service  # ✅ Import INSIDE property
+            self._llm = get_llm_service()
+        return self._llm
+    
+    @property
+    def embedder(self):
+        """Lazy property to get embedder"""
+        if self._embedder is None:
+            from app.service.embedding_service import embedder  # ✅ Import INSIDE property
+            self._embedder = embedder
+        return self._embedder
+
+    
     def detect_entity_type(self, org_id: str, columns: list[str], filename: str) -> dict:
         """Detect entity type with JSON validation and timeout"""
         columns_str = ",".join(columns)