"""数据库会话依赖"""

from typing import AsyncGenerator
from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine, async_sessionmaker
from app.config import settings

# 处理 sqlite 协议兼容
db_url = settings.DATABASE_URL
if db_url.startswith("sqlite"):
    db_url = db_url.replace("sqlite://", "sqlite+aiosqlite://")

engine = create_async_engine(db_url, echo=False, pool_pre_ping=True)
async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)


async def get_db() -> AsyncGenerator[AsyncSession, None]:
    async with async_session() as session:
        try:
            yield session
        finally:
            await session.close()


async def init_db():
    """创建所有表"""
    from app.models.device import Base
    async with engine.begin() as conn:
        await conn.run_sync(Base.metadata.create_all)