import redis.asyncio as aioredis
from core.utils.log.logger_manager import LoggerManager
class RedisManager:
    _pool = None
    logger = LoggerManager.get_logger()

    @classmethod
    async def init(
        cls,
        redis_url: str = "",
        max_connections: int = 20,
        encoding: str = "utf-8",
        decode_responses: bool = True
    ):
        """
        初始化 Redis 异步连接池，保证进程级单例。
        """
        if cls._pool is None:
            try:
                cls._pool = await aioredis.from_url(
                    redis_url,
                    max_connections=max_connections,
                    encoding=encoding,
                    decode_responses=decode_responses,
                    retry_on_timeout=True,
                )
                cls.logger.debug(f"[RedisManager] Redis 连接池初始化成功: {redis_url}")
            except Exception as e:
                cls.logger.error(f"[RedisManager] Redis 连接池初始化失败: {e}")
                raise

    @classmethod
    def get_pool(cls):
        if cls._pool is None:
            raise Exception("[RedisManager] 未初始化，请先执行 RedisManager.init()")
        return cls._pool

    @classmethod
    async def close(cls):
        """
        关闭连接池（在优雅退出时调用）
        """
        if cls._pool:
            await cls._pool.close()
            cls.logger.debug("[RedisManager] Redis 连接池已关闭")