import json
import pytz
import resource
from redis.asyncio import Redis
from datetime import datetime, timedelta


def redis_qpush(redis_client, qname: str, data: dict, max_len: int = 30):
    """向队列右侧推入数据，并限制队列最大长度"""
    data_string = json.dumps(data)
    pipe = redis_client.pipeline()
    pipe.rpush(qname, data_string)
    pipe.ltrim(qname, -max_len, -1)  # 只保留右侧 max_len 个元素
    pipe.execute()

def redis_qpop(redis_client, qname:str, timeout: int = 5):
    message = redis_client.blpop(qname, timeout=timeout)
    if message is None:
        return None  # 队列为空，直接返回
    message_string = message[1]
    data = json.loads(message_string)
    return data