from typing import AsyncGenerator
from sqlmodel import SQLModel
from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine
from sqlmodel.ext.asyncio.session import AsyncSession
from src.core.config import settings


async_engine = create_async_engine(
    settings.ASYNC_DATABASE_URL,
    echo=False,
    future=True,
    pool_size=20,
    max_overflow=40,
    pool_timeout=30,
    connect_args={"ssl": True},
)

async_session = async_sessionmaker(
    async_engine,
    class_=AsyncSession,
    expire_on_commit=False,
    autoflush=False
)

async def init_db():
    async with async_engine.begin() as conn:
        await conn.run_sync(SQLModel.metadata.create_all)

async def get_async_session() -> AsyncGenerator[AsyncSession, None]:
    async with async_session() as session:
        yield session