#!/usr/bin/env python

import sys
from datetime import datetime
from stamper import DATETIME_FORMAT, Stamper


def usage(name):
    msg = """
    Usage:

    To start tracking time: %(name)s

    To record time for a given task: %(name)s customer action
    """ % {'name': name}
    print(msg)


if __name__ == '__main__':

    s = Stamper()
    s.load_stamps()

    if len(sys.argv) == 1:
        # stamp!
        s.stamp(datetime.today().strftime(DATETIME_FORMAT), 
                None, None, None)

    elif len(sys.argv) >= 3:
        # record!
        last_stamp = s.last_stamp()
        current_start = last_stamp['end']
        if not current_start:
            current_start = last_stamp['start']
        customer = sys.argv[1]
        description = ' '.join(sys.argv[2:])
        s.stamp(current_start, datetime.today().strftime(DATETIME_FORMAT),
                customer, description)

    else:
        usage(sys.argv[0])
        sys.exit(1)

    s.save_stamps()