#!/usr/bin/env python

import argparse

parser = argparse.ArgumentParser()

args = parser.parse_args()

import datetime

from zoneinfo import ZoneInfo

import itertools

import pathlib

import sys

import time

import requests

def challenge_dates():

for year in itertools.count(2015):

month = 12

for day in range(1, 25 + 1):

yield datetime.datetime(year, month, day, tzinfo=ZoneInfo("America/Detroit"))

def sleep(s):

if isinstance(s, datetime.datetime):

s = s - datetime.datetime.now(tz=datetime.timezone.utc)

if isinstance(s, datetime.timedelta):

s = s.total_seconds()

s = max(s, 0)

time.sleep(s)

return s > 0

s = requests.Session()

with open('.cookie') as cookie:

s.cookies.set('session', cookie.read().strip(), domain='adventofcode.com')

for date in challenge_dates():

print(date.date())

dest = pathlib.Path(f'{date.year:04}/{date.day:02}/.input')

if dest.exists():

continue

if sleep(date):

sleep(10)

with s.get(f'https://adventofcode.com/{date.year}/day/{date.day}/input', stream=True) as response:

response.raise_for_status()

dest.parent.mkdir(parents=True,exist_ok=True)

with dest.open('wb') as input_file:

for chunk in response.iter_content(chunk_size=None):

input_file.write(chunk)

sleep(60)