# -*- coding: utf-8 -*-

import os
import sys
import json

from typing import List
from http.client import responses

from alibabacloud_alidns20150109.client import Client as Alidns20150109Client
from alibabacloud_tea_openapi import models as open_api_models
from alibabacloud_alidns20150109 import models as alidns_20150109_models
from alibabacloud_tea_util import models as util_models
from alibabacloud_tea_util.client import Client as UtilClient
from alibabacloud_cms20190101.client import Client as Cms20190101Client
from alibabacloud_tea_openapi import models as open_api_models
from alibabacloud_cms20190101 import models as cms_20190101_models
from alibabacloud_tea_util import models as util_models
from alibabacloud_tea_util.client import Client as UtilClient

import conf
import utils

def main():
    try:
        # 云监控客户端
        metrics_client = utils.client(access_key_id=conf.metrics_client['access_key_secret'],
                                      access_key_secret=conf.metrics_client['access_key_secret'],
                                      endpoint=conf.metrics_client['endpoint']
                                      )
        # DNS客户端
        dns_client = utils.client(access_key_id=conf.dns_client['access_key_secret'],
                                  access_key_secret=conf.dns_client['access_key_secret'],
                                  endpoint=conf.dns_client['endpoint']
                                  )
        # 获取共享带宽流量 metric_name 入网流量
        bandwidth = utils.DescribeMetricList(metrics_client=metrics_client,
                                       namespace=conf.namespace,
                                       metric_name=conf.metric_name,
                                       period=conf.period,
                                       dimensions=conf.dimensions,
                                       start_time=conf.start_time,
                                       end_time=conf.end_time)
        # 获取所有dns解析RecordId
        # {'Value': '', 'RecordId': ''}
        record_list = utils.DescribeDomainRecords(dns_client=dns_client,
                                             lang=conf.lang,
                                             domain_name=conf.domain_name)
        # 获取backup_alb RecordId
        matched_record_ids = [
            record['RecordId']
            for record in record_list
            if record['Value'] in conf.backup_alb_ip_list
        ]

        # 计算权重比
        backup_weight = utils.update_dns_weights(bandwidth)
        for record in matched_record_ids:
            # 修改backup权重
            utils.update_dnsslbweight(dns_client=dns_client,
                                      lang=conf.lang,
                                      record=record,
                                      backup_weight=backup_weight)
    except Exception as e:
        exit(e)

if __name__ == '__main__':
    main()