Update backend_app/config.py

backend_app/config.py

@@ -1,34 +1,48 @@
-import os
-from dotenv import load_dotenv
-
-load_dotenv()
-
-# Storage
-DATA_DIR = os.getenv("DATA_DIR", "data")
-FAISS_INDEX_PATH = os.path.join(DATA_DIR, "faiss.index")
-DOCSTORE_PATH = os.path.join(DATA_DIR, "docs.pkl")
-RAW_CACHE_PATH = os.path.join(DATA_DIR, "raw_cache.jsonl")
-URLS_PATH = os.path.join(DATA_DIR, "urls.json")
-
-# Retrieval + Web fallback tuning
-MIN_TOP_SCORE = float(os.getenv("MIN_TOP_SCORE", "0.30"))
-WEB_MAX_RESULTS = int(os.getenv("WEB_MAX_RESULTS", "3"))
-
-# Embeddings (free local)
-EMBED_MODEL_NAME = os.getenv(
-    "EMBED_MODEL_NAME",
-    "sentence-transformers/all-MiniLM-L6-v2"
-)
-
-# LLM Provider (free local via Ollama)
-LLM_PROVIDER = os.getenv("LLM_PROVIDER", "ollama").lower()
-OLLAMA_BASE_URL = os.getenv("OLLAMA_BASE_URL", "http://localhost:11434")
-OLLAMA_MODEL = os.getenv("OLLAMA_MODEL", "phi3")
-
-# Chatbot identity (UI + greeting)
-BOT_NAME = os.getenv("BOT_NAME", "SysLink Assistant")
-BOT_WELCOME = os.getenv(
-    "BOT_WELCOME",
-    "Welcome to SysLink Food System 👋 How can I help you today?"
-)
-BOT_LOGO_URL = os.getenv("BOT_LOGO_URL", "/assets/bot-logo.png")
+import os
+from dotenv import load_dotenv
+
+load_dotenv()
+
+# ==============================
+# Storage
+# ==============================
+DATA_DIR = os.getenv("DATA_DIR", "data")
+FAISS_INDEX_PATH = os.path.join(DATA_DIR, "faiss.index")
+DOCSTORE_PATH = os.path.join(DATA_DIR, "docs.pkl")
+RAW_CACHE_PATH = os.path.join(DATA_DIR, "raw_cache.jsonl")
+URLS_PATH = os.path.join(DATA_DIR, "urls.json")
+
+# ==============================
+# Retrieval + Web fallback tuning
+# ==============================
+MIN_TOP_SCORE = float(os.getenv("MIN_TOP_SCORE", "0.30"))
+WEB_MAX_RESULTS = int(os.getenv("WEB_MAX_RESULTS", "2"))
+
+# ==============================
+# Embeddings (free local CPU)
+# ==============================
+EMBED_MODEL_NAME = os.getenv(
+    "EMBED_MODEL_NAME",
+    "sentence-transformers/all-MiniLM-L6-v2"
+)
+
+# ==============================
+# LLM Provider (Hugging Face Inference API)
+# ==============================
+LLM_PROVIDER = "huggingface"
+
+HF_TOKEN = os.getenv("HF_TOKEN")
+HF_MODEL = os.getenv(
+    "HF_MODEL",
+    "google/gemma-2-2b-it"   # stable free inference model
+)
+
+# ==============================
+# Chatbot identity (UI + greeting)
+# ==============================
+BOT_NAME = os.getenv("BOT_NAME", "SysLink Assistant")
+BOT_WELCOME = os.getenv(
+    "BOT_WELCOME",
+    "Welcome to SysLink Food System 👋 How can I help you today?"
+)
+BOT_LOGO_URL = os.getenv("BOT_LOGO_URL", "")