#!/usr/bin/env python3

from datetime import datetime, timedelta
import argparse

# Parse command line arguments
parser = argparse.ArgumentParser(description="Description")
 
# add arguments to the parser
parser.add_argument("-f", "--file")
parser.add_argument("mode",
                    help="display the square of a given number",
                    nargs='?', default="total",
                    choices=["total"])

args = parser.parse_args()

if args.file:
    time_file = open(args.file,'r')
else:
    time_file = open('time.txt','r')

if args.mode == "total":
    total_time = timedelta()

    for line in time_file:
        date_time_description = line.split(" ", 2)
        
        hours, minutes = date_time_description[1].split(':', 1)
        delta = timedelta(hours=int(hours), minutes=int(minutes))
        
        total_time += delta

    print('Total time: ', total_time)