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

DATABASE_URL = os.getenv(
    "DATABASE_URL",
    "postgresql+asyncpg://postgres:postgres@db:5432/taptrack_hub",
)

engine = create_async_engine(DATABASE_URL, echo=False, pool_pre_ping=True)
AsyncSessionLocal = async_sessionmaker(engine, expire_on_commit=False)


class Base(DeclarativeBase):
    pass


async def get_db() -> AsyncSession:
    async with AsyncSessionLocal() as session:
        yield session