class RankTracker:

	def __init__(self, rating):

		self._rounded_rating = round_rating(rating)

	@property

	def rank(self):

		return rating_to_rank(self._rounded_rating)

	def update(self, rating):

		rounded_rating = round_rating(rating)

		if rounded_rating == self._rounded_rating:

			return False

		elif rounded_rating > self._rounded_rating:  # promotion

			self._rounded_rating = rounded_rating

			return self.rank

		else:  # demotion

			if rounded_rating >= 1500 and self._rounded_rating - rating > 100:

				self._rounded_rating = rounded_rating

				return self.rank

			elif self._rounded_rating - rating > 150:

				self._rounded_rating = rounded_rating+100

				return self.rank

			else:

				return False

if __name__ == "__main__":

	parser = argparse.ArgumentParser()

	parser.add_argument("since", help="a date in YYYYMMDD format")

	parser.add_argument("to", nargs="?", help="a date in YYYYMMDD format")

	parser.add_argument("-c", "--country-code", default="CZ", help="a two letter country code, default=CZ")

	args = parser.parse_args()

	since = datetime.strptime(args.since, "%Y%m%d")

	to = datetime.strptime(args.to, "%Y%m%d") if args.to else datetime.now()

	with open("/tmp/all.hst") as f:

		s = f.read()

	records = [Record.parse(line) for line in s.splitlines()]

	records = filter(lambda rec: rec is not None, records)

	national_records = filter(lambda rec: rec.country_code == args.country_code, records)

	player_records = groupby(national_records, lambda rec: rec.pin)

	for (pin, recs) in player_records:

		tourneys = list(recs)

		rounded_rating = tourneys[0].rounded_before

		steps = []

		for r in tourneys:

			# omit reset ratings

			if rounded_rating != r.rounded_before:

				rounded_rating = r.rounded_before

			if r.rating_after-rounded_rating >= 50 or \

					(rounded_rating-r.rating_after > 100 and rounded_rating >= 1600):

				steps.append(r)

				rounded_rating = r.rounded_after

			elif rounded_rating-r.rating_after > 150:

				steps.append(r)

				rounded_rating = r.rounded_after + 100

		steps = [r for r in steps if since <= r.date <= to]

		if steps:

			print("\n".join(map(str, steps)))

			print()