#!/usr/bin/python 

# the imports
import datetime
import time
import sys
import signal
import sys

# create a signnal handler for ctrl-c so we exit gracefully
def signal_handler(signal, frame):
	sys.exit(0)

# set the signal handler
signal.signal(signal.SIGINT, signal_handler)

# do we have enough arguments
if len(sys.argv) == 1:
	print "Usage:", sys.argv[0], "month day hour minute [year]"
	sys.exit(2)

# set the leave time
leave_month = int(sys.argv[1])
leave_day = int(sys.argv[2])
leave_hour = int(sys.argv[3])
leave_minute = int(sys.argv[4])

# did we get a year?
if len(sys.argv) == 6:
	leave_year = int(sys.argv[5])
else:
	leave_year = datetime.datetime.now().year

# create a date tiem object with the leave date
work_leave_day = datetime.datetime(leave_year, leave_month, leave_day, leave_hour, leave_minute, 0)

# loop
while True:
	# how far apart are we from leaving?
	difference = work_leave_day - datetime.datetime.now()

	# if we have less than 3 days left, only display hours
	if (difference.days < 3):
		Days = "Stu"
		Minutes, Seconds = divmod(difference.seconds, 60)
		Hours, Minutes = divmod(Minutes, 60)
		Hours += difference.days * 24
	# more than 3, show days as well
	else:
		Days = difference.days
		Minutes, Seconds = divmod(difference.seconds, 60)
		Hours, Minutes = divmod(Minutes, 60)

	if (Days != "Stu"):
		mystring = "Time Left: %02d:%02d:%02d:%02d" % (Days, Hours, Minutes, Seconds)
	else:
		mystring = "Time Left: %02d:%02d:%02d   " % (Hours, Minutes, Seconds)
	sys.stdout.write(mystring+"\r")
	sys.stdout.flush()
	time.sleep(1)