# MIT License

# Copyright (c) 2021 Rene Jean Corneille

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

import datetime

import click

@click.command()
@click.option('--fmt', help='the date format', required=True, default='%B-%d-%Y, %H:%M:%S')
def main(fmt):
    """CLI implementation"""
    try:
        print(_get_str_date(datetime.datetime.utcnow(), fmt))
    except Exception as e:
        print('error: {}'.format(str(e)))

def _get_str_date(date: datetime.datetime, fmt: str) -> str:
    """Returns str date as given format.
    
    Args:
        date (datetime.datetime): datetime input
        fmt (str): date string format (python style format)

    """
    return date.strftime(fmt)
