from bs4 import BeautifulSoup
import sys
import json
from signal import signal, SIGPIPE, SIG_DFL

if __name__ == '__main__':
    page = sys.stdin.read()
    soup = BeautifulSoup(page, "html.parser")
    script = [s.string.strip() for s in soup.find_all('script')
              if s.string is not None
              and s.string.strip().startswith("window.__REDIAL_PROPS__")]
    if len(script) != 1:
        print("Cannot find window.__REDIAL_PROPS__ script in which we are \
               supposed to retrieve the data json", file=sys.stderr)
        sys.exit(1)
    lbcjsonstart = script[0].find('[')
    lbcjson = json.loads(script[0][lbcjsonstart:])
    ads = [obj["data"]["ads"] for obj in lbcjson
           if type(obj) == dict and "data" in obj
           and "ads" in obj["data"]]
    if len(ads) != 1:
        print("Cannot find the ads section in flux state")
        sys.exit(1)
    print(json.dumps(ads[0]))
    signal(SIGPIPE, SIG_DFL)
    sys.exit(0)