from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, declarative_base
import os

# Use SQLite if PostgreSQL is not available (no Docker needed)
DATABASE_URL = os.getenv("DATABASE_URL", "sqlite:///./lexflow.db")

# SQLite needs connect_args for check_same_thread
connect_args = {}
if DATABASE_URL.startswith("sqlite"):
    connect_args = {"check_same_thread": False}

engine = create_engine(DATABASE_URL, connect_args=connect_args)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()


def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()