from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
from sqlalchemy.orm import sessionmaker
from app.models import Base
from app.config import get_settings


settings = get_settings()

# Convert sqlite:/// to sqlite+aiosqlite:/// for async support
db_url = settings.database_url.replace("sqlite://", "sqlite+aiosqlite://")

# Create async engine
engine = create_async_engine(db_url, echo=True)

# Create async session factory
async_session = async_sessionmaker(
    engine, class_=AsyncSession, expire_on_commit=False
)


async def init_db():
    """Initialize database tables."""
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)


async def get_db():
    """Dependency for getting database session."""
    async with async_session() as session:
        try:
            yield session
        finally:
            await session.close()