config.py

# config.py
import os
from pathlib import Path
from dotenv import load_dotenv

# ---------------- Env & paths ----------------
load_dotenv()

BASE_FAQ_PATH  = os.getenv("BASE_FAQ_PATH", "basic_faq.csv")
FALLBACK_PATH  = os.getenv("FALLBACK_PATH", "fallback.csv")

GEMINI_API_KEY = os.getenv("GEMINI_API_KEY")
if not GEMINI_API_KEY:
    raise RuntimeError("Set GEMINI_API_KEY in your .env (GEMINI_API_KEY=...)")

EMBED_MODEL    = os.getenv("EMBED_MODEL", "text-embedding-004")
GENERATE_MODEL = os.getenv("GENERATE_MODEL", "gemini-1.5-flash")

TOP_K          = int(os.getenv("TOP_K", "8"))
THRESHOLD      = float(os.getenv("THRESHOLD", "0.60"))
HYBRID_ALPHA   = float(os.getenv("HYBRID_ALPHA", "0.65"))
USE_SPELLCHECK = os.getenv("USE_SPELLCHECK", "0") == "1"

FAISS_DIR = Path(".faiss")
LOG_DIR   = Path("logs")
FAISS_DIR.mkdir(exist_ok=True)
LOG_DIR.mkdir(exist_ok=True)