import requests
import time

def get_jd_time():
   url = "https://api.m.jd.com/"
   payload={}
   headers = {
      'User-Agent': 'Apifox/1.0.0 (https://apifox.com)',
      'Accept': '*/*',
      'Host': 'api.m.jd.com',
      'Connection': 'keep-alive'
   }

   response = requests.request("GET", url, headers=headers, data=payload)
   delay_time = int(response.elapsed.total_seconds()*1000)
   jd_timestamp = int(response.headers['X-API-Request-Id'][-13:])

   print(jd_timestamp, time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(jd_timestamp/1000)), ', 响应时间:', int(response.elapsed.total_seconds()*1000), 'ms')
   
   return jd_timestamp, delay_time

def jd_timer(target):
   target_timestamp = int(time.mktime(time.strptime(target, '%Y-%m-%d %H:%M:%S'))*1000)
   print(target_timestamp)
   jd_ts, delay = get_jd_time()
   while jd_ts < target_timestamp:
      delta = target_timestamp - jd_ts
      if delta > 3600*1000:
         time.sleep(3600)
      elif delta > 600*1000:
         time.sleep(600)
      elif delta > 120*1000:
         time.sleep(60)
      elif delta > 60*1000:
         time.sleep(30)
      elif delta > 30*1000:
         time.sleep(30)
      elif delta > 10*1000:
         time.sleep(1)
      elif delta > 3*1000:
         time.sleep(0.5)
      elif delta > 1*1000:
         time.sleep(0.2)
      else:
         if delta <= delay:
            break
         else:
            sleep_val = delta - delay - 5
            time.sleep(sleep_val/1000)
      jd_ts, delay = get_jd_time()
   print('done')


if __name__ == '__main__':
   target = '2025-01-21 12:17:00'
   jd_timer(target)