"""
@author: luojunhui
每日将odps的回流前5000的数据存储迁移的数据库中
"""
import asyncio

import aiohttp
from datetime import datetime, timedelta

from applications import ODPSApi


# 异步post请求
async def asyncPost(url, headers, payload):
    """
    :param url:
    :param headers:
    :param payload:
    :return:
    """
    retries = 3
    async with aiohttp.ClientSession() as session:
        for attempt in range(3):
            try:
                async with session.post(url, headers=headers, json=payload, timeout=10) as response:
                    return await response.json()
            except asyncio.TimeoutError:
                if attempt < retries - 1:
                    await asyncio.sleep(2)  # 等待一段时间后重试
                else:
                    raise


# 获取昨天的日期的字符串
def getYesterdayStr():
    """获取昨天的日期字符"""
    today = datetime.now()
    # 计算昨天的日期
    yesterday = today - timedelta(days=1)
    return yesterday.strftime('%Y%m%d')


class updateFromOdps(object):
    """
    从odps更新数据
    """
    odps_server = ODPSApi()

    @classmethod
    def getVideoFromOdps(cls):
        """
        从odps中获取视频list
        :return:
        """
        date_info = getYesterdayStr()
        sql = f"""
        select videoid, title, 回流人数, uid, 总曝光, share_total, 品类标签, dt
        from loghubods.lastday_return 
        where dt = '{date_info}';
        """
        result = cls.odps_server.select(sql)
        response = [
            {
                "video_id": i['videoid'],
                "title": i['title'],
                "last_day_return": i['回流人数'],
                "uid": i['uid'],
                "last_day_view": i['总曝光'],
                "last_day_share": i['share_total'],
                "category": i['品类标签'],
                "dt": i['dt']
            }
            for i in result
        ]
        return response

    @classmethod
    async def insertIntoDB(cls, data_list):
        """
        插入mysql
        :return:
        """
        # 分组，每组分50个
        def chunk_list(lst, chunk_size):
            """
            将列表分割成指定大小的chunks。

            :param lst: 要分割的列表。
            :param chunk_size: 每个chunk的大小。
            :return: 包含chunks的生成器。
            """
            for i in range(0, len(lst), chunk_size):
                yield lst[i:i + chunk_size]

        task_list = chunk_list(data_list, chunk_size=50)
        for tasks in task_list:
            task_ = [cls.insertSingleVideoToDB(params) for params in tasks]
            await asyncio.gather(*task_)

    @classmethod
    async def insertSingleVideoToDB(cls, video_obj):
        """
        更新单个视频
        :param video_obj:
        :return:
        """
        url = "http://localhost:8813/insertVideo"
        headers = {"Content-Type": "application/json"}
        response = await asyncPost(
            url=url,
            headers=headers,
            payload=video_obj
        )
        return response