from typing import AsyncGenerator

from litestar.contrib.sqlalchemy.plugins import EngineConfig, SQLAlchemyAsyncConfig
from litestar.exceptions import ClientException
from litestar.status_codes import HTTP_409_CONFLICT
from sqlalchemy import URL
from sqlalchemy.exc import IntegrityError
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker


async def provide_transaction(
    db_session: AsyncSession,
) -> AsyncGenerator[AsyncSession, None]:
    try:
        async with db_session.begin():
            yield db_session
    except IntegrityError as exc:
        raise ClientException(
            status_code=HTTP_409_CONFLICT,
            detail=str(exc),
        ) from exc


sessionmaker = async_sessionmaker(expire_on_commit=False)

db_connection_string = URL.create(
    drivername="postgresql+asyncpg",
    username="televend",
    password="televend",
    host="localhost",
    port=5433,
    database="televend",
)
db_config = SQLAlchemyAsyncConfig(
    connection_string=db_connection_string.render_as_string(hide_password=False),
    engine_config=EngineConfig(
        echo=True,
    ),
)