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

from app.config import settings


engine = create_engine(
    settings.database_url,
    connect_args={"check_same_thread": False} if settings.database_url.startswith("sqlite") else {},
    future=True,
)

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


class Base(DeclarativeBase):
    pass


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


def init_db():
    from app import models  # noqa: F401 — registers models on Base

    Base.metadata.create_all(bind=engine)