#!/usr/bin/env python3
"""
Provides a countdown to some particular date.
"""
from datetime import datetime

from module import commands, example
from tools.time import relativeTime


@commands("countdown")
@example(".countdown 2012 12 21")
def generic_countdown(bot, trigger):
	"""
	.countdown <year> <month> <day> - displays a countdown to a given date.
	"""
	text = trigger.group(2)
	if not text:
		return bot.msg("Please use correct format: .countdown 2012 12 21")

	text = text.split()
	if (len(text) != 3 or not text[0].isdigit() or not text[1].isdigit() 
			or not text[2].isdigit()):
		return bot.msg("Please use correct format: .countdown 2012 12 21")
	try:
		date = datetime(int(text[0]), int(text[1]), int(text[2]))
	except:
		return bot.msg("Please use correct format: .countdown 2012 12 21")

	msg = relativeTime(datetime.now(), date)
	msg += " until " + trigger.group(2)
	bot.msg(msg)