# ─────────────────────────────────────────────────────────────────
#  GCAS Search Engine – Environment Variables
#  Copy this file to .env and fill in your values.
# ─────────────────────────────────────────────────────────────────

# Absolute or relative path to the folder containing your .xlsx files
EXCEL_FOLDER=./data

# Where the FAISS index cache is stored between restarts
INDEX_CACHE_FOLDER=./index_cache

# ── Embedding provider ────────────────────────────────────────────
# "local"  → sentence-transformers (free, no API key, runs on CPU)
# "openai" → OpenAI Embeddings API (faster for large re-indexes)
EMBEDDING_PROVIDER=local
LOCAL_EMBEDDING_MODEL=all-MiniLM-L6-v2
OPENAI_EMBEDDING_MODEL=text-embedding-3-small

# ── LLM reranker ─────────────────────────────────────────────────
# "openai"    → GPT-4o-mini (good balance of speed & quality)
# "anthropic" → Claude Haiku (slightly cheaper)
LLM_PROVIDER=openai
LLM_MODEL=gpt-4o-mini

# ── API Keys ──────────────────────────────────────────────────────
# These are server-level defaults.
# Individual search requests can override with their own key.
OPENAI_API_KEY=sk-...
ANTHROPIC_API_KEY=sk-ant-...

# ── Search defaults ───────────────────────────────────────────────
DEFAULT_TOP_K=10
# How many FAISS candidates are gathered before LLM reranking
RERANK_POOL_SIZE=50

# ── Server ────────────────────────────────────────────────────────
API_HOST=0.0.0.0
API_PORT=8000