from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine, async_sessionmaker
from sqlalchemy.orm import DeclarativeBase

from app.config import settings

# Convert postgresql:// to postgresql+asyncpg://
database_url = settings.database_url.replace("postgresql://", "postgresql+asyncpg://")

engine = create_async_engine(database_url, echo=False)

async_session_maker = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)


class Base(DeclarativeBase):
    pass


async def get_db() -> AsyncSession:
    async with async_session_maker() as session:
        try:
            yield session
        finally:
            await session.close()