import os

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

DATABASE_URL = os.getenv(
    "DATABASE_URL",
    "postgresql://mapmil:mapmil@ca-db:5432/mapmil",
)

connect_args: dict = {}
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)


class Base(DeclarativeBase):
    pass


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