# -*- coding = utf-8 -*-
# @Time : 2025/2/13 下午12:19
# @File : engine.py
# @Software : PyCharm
# @Author : xingc
# @Desc :
import functools
import logging
from typing import AsyncGenerator, Callable

import redis.asyncio as aioredis
from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker
from sqlalchemy.ext.asyncio import AsyncSession

from config import settings

logger = logging.getLogger(__name__)
engine = create_async_engine(
    (
            settings.DB_URL or
            '{scheme}://{user}:{password}@{host}:{port}/{db}'.format(
                scheme=settings.DB_SCHEMA,
                user=settings.DB_USER,
                password=settings.DB_PASSWORD,
                host=settings.DB_HOST,
                port=settings.DB_PORT,
                db=settings.DB_NAME,
            )
    ),
    pool_size=settings.DB_POOL_SIZE,
    pool_recycle=1800,
    pool_timeout=30,
    connect_args={'charset': 'utf8mb4', "connect_timeout": 5},
    echo=settings.DEBUG
)
session_maker = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)


async def get_async_session() -> AsyncGenerator[AsyncSession, None]:
    async with session_maker() as session:
        # async with session.begin():
        yield session


def async_db_session():
    """ 异步获取db_session装饰器。 """

    def decorator(func: Callable):
        @functools.wraps(func)
        async def wrapper(*args, **kwargs):
            async with session_maker() as session:
                try:
                    kwargs.setdefault('db_session', session)
                    return await func(*args, **kwargs)
                except Exception as e:
                    await session.rollback()
                    logger.exception(e)
                    return None

        return wrapper

    return decorator


def create_redis_pool():
    return aioredis.ConnectionPool(
        host=settings.REDIS_HOST, port=settings.REDIS_PORT, password=settings.REDIS_PASSWORD, db=settings.REDIS_DB,
        decode_responses=True
    )


redis_pool = create_redis_pool()


async def get_cache() -> aioredis.Redis:
    return aioredis.Redis(connection_pool=redis_pool)