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

try:
    import os
    DATABASE_URL = os.environ.get("DATABASE_URL", "postgresql://ollama:password@localhost:5432/ollama_proxy")
    if "sqlite" in DATABASE_URL:
        engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
    else:
        engine = create_engine(DATABASE_URL)
except:
    DATABASE_URL = "sqlite:///./test.db"
    engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})

SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()

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