import datetime
from typing import Any
from typing import Generator

from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import Session
from sqlalchemy.orm import sessionmaker

from app.config import SQLALCHEMY_DATABASE_URL

engine = create_engine(
    SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base: Any = declarative_base()


def now() -> datetime.datetime:
    return datetime.datetime.now(datetime.timezone.utc)


def get_db() -> Generator[Session, None, None]:
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()