config.py

import os

# --- API Keys & Secrets ---
GOOGLE_API_KEY    = os.environ.get("GOOGLE_API_KEY", "")
PINECONE_API_KEY  = os.environ.get("PINECONE_API_KEY", "")
GOOGLE_CLIENT_ID  = os.environ.get("GOOGLE_CLIENT_ID", "")

# Optional: shared fallback key (users bring their own via BYOK)
OPENROUTER_API_KEY = os.environ.get("OPENROUTER_API_KEY", "")

# Optional: shared Tavily web-search fallback key (users bring their own via BYOK)
TAVILY_API_KEY = os.environ.get("TAVILY_API_KEY", "")

# --- LangSmith (tracing & analytics) ---
os.environ["LANGCHAIN_TRACING_V2"] = os.environ.get("LANGSMITH_TRACING", "true")
os.environ["LANGCHAIN_API_KEY"] = os.environ.get("LANGSMITH_API_KEY", "")
os.environ["LANGCHAIN_PROJECT"] = os.environ.get("LANGCHAIN_PROJECT", "stemcopilot-prod")

# --- Pinecone ---
PINECONE_INDEX = "stem-embed"

# --- Embedding ---
EMBED_MODEL_NAME  = "BAAI/bge-large-en-v1.5"
BGE_QUERY_PREFIX  = "Represent this sentence: "

# --- Database ---
DB_PATH = "/data/stemgraph.db" if os.path.isdir("/data") else "stemgraph.db"

# --- Defaults ---
DEFAULT_PERSONA = "nerd"
RETRIEVAL_TOP_K = 5
LLM_TIMEOUT = 180  # seconds — free models are slow, needs generous timeout