import asyncio
import logging
from typing import List, Optional, Callable, Any
from mq_http_sdk.mq_client import MQClient
from mq_http_sdk.mq_consumer import Message
from mq_http_sdk.mq_exception import MQExceptionBase

from config import settings
from core.utils.log.logger_manager import LoggerManager



class AsyncRocketMQConsumer:
    """
    阿里云 RocketMQ HTTP 协议异步消费者封装类
    - 支持自动读取环境变量
    - 基于 asyncio 实现原生异步消费模型
    - 手动确认消费
    - 提供单条消息处理模式
    """

    def __init__(
            self,
            topic_name: Optional[str],
            group_id: Optional[str],
            wait_seconds: Optional[int] = None,
    ):
        # 从环境变量读取配置
        self.endpoint = settings.ROCKETMQ_ENDPOINT
        self.access_key_id = settings.ROCKETMQ_ACCESS_KEY_ID
        self.access_key_secret = settings.ROCKETMQ_ACCESS_KEY_SECRET
        self.instance_id = settings.ROCKETMQ_INSTANCE_ID
        self.wait_seconds = wait_seconds or settings.ROCKETMQ_WAIT_SECONDS
        self.topic_name = topic_name
        self.group_id = group_id

        # 初始化客户端
        self.client = MQClient(self.endpoint, self.access_key_id, self.access_key_secret)
        self.consumer = self.client.get_consumer(self.instance_id, self.topic_name, self.group_id)

        self.logger = LoggerManager.get_logger()
        self.aliyun_logger = LoggerManager.get_aliyun_logger()

    async def receive_message(self) -> Optional[Message]:
        """异步拉取单条消息"""
        try:
            self.logger.debug(f"[{self.topic_name}]开始拉取单条消息，等待时间: {self.wait_seconds}秒")
            messages = await asyncio.to_thread(
                self.consumer.consume_message,
                settings.ROCKETMQ_BATCH,
                self.wait_seconds,
            )
            if messages:
                self.logger.debug(f"[{self.topic_name}]成功拉取到1条消息")
                return messages[0]
            return None
        except MQExceptionBase as e:
            if getattr(e, "type", "") == "MessageNotExist":
                # 更友好的日志输出，使用INFO级别而非ERROR
                self.logger.info(f"[{self.topic_name}]当前没有可消费的消息，继续等待...")
                return None
            # 其他类型的异常仍按错误处理
            self.logger.error(f"[{self.topic_name}]拉取消息失败: {e}")
            raise e

    async def ack_message(self, receipt_handle: str) -> None:
        """确认消费成功"""
        try:
            await asyncio.to_thread(self.consumer.ack_message, [receipt_handle])
            self.logger.debug(f"[{self.topic_name}]消息确认成功")
        except Exception as e:
            self.logger.error(f"[{self.topic_name}]确认消息失败: {e}")
            raise RuntimeError(f"[{self.topic_name}]确认消息失败: {e}")

    async def process_single_message(self, handler: Callable[[Message], Any]) -> bool:
        """
        处理单条消息的完整流程：拉取、处理、确认

        返回值：是否成功处理并确认消息
        """
        message = await self.receive_message()
        if not message:
            return False

        try:
            self.logger.info(f"[{self.topic_name}]收到消息 ID: {message.message_id}")
            # 执行消息处理任务
            await handler(message)
            # 任务成功后确认消息
            await self.ack_message(message.receipt_handle)
            self.logger.info(f"[{self.topic_name}]消息 ID: {message.message_id} 处理并确认成功")
            return True
        except Exception as e:
            self.logger.error(f"[{self.topic_name}]处理消息失败: {e}", exc_info=True)
            # 消息处理失败，不会确认消息，RocketMQ会在可见时间后重新投递
            return False



    async def run_single_threaded(self, handler: Callable[[Message], Any], max_retries: int = 3):
        """
        单线程模式处理消息：获取一条消息，处理完成后再获取下一条

        :param handler: 异步消息处理函数 async def handler(msg: Message)
        :param max_retries: 消息处理失败后的最大重试次数
        """
        self.logger.info(f"[AsyncRocketMQConsumer] 启动单线程消费模式: Topic={self.topic_name}, Group={self.group_id}")

        while True:
            try:
                success = await self.process_single_message(handler)
                if not success:
                    # 没有消息或处理失败，适当等待避免频繁请求
                    await asyncio.sleep(1)
            except Exception as e:
                self.logger.error(f"消费循环异常: {e}", exc_info=True)
                await asyncio.sleep(5)  # 发生异常时等待较长时间


async def process_message(message: Message) -> None:
    """示例消息处理函数"""
    # self.logger.info(f"开始处理消息: {message.message_body}")
    # 模拟处理耗时操作
    await asyncio.sleep(2)
    # self.logger.info(f"消息处理完成")


if __name__ == '__main__':

    async def run_consumer():
        consumer = AsyncRocketMQConsumer(
            topic_name="ynfqmm_recommend_prod",
            group_id="ynfqmm_recommend_prod",
            wait_seconds=30,  # 长轮询等待时间
        )
        await consumer.run_single_threaded(process_message)


    asyncio.run(run_consumer())