#!/usr/bin/env python
# -*- coding: utf-8 -*-
import argparse
from transform.Transform import Transform


def parse_args():
    '''
    Argument Parser for terminal usage.
    '''
    parser = argparse.ArgumentParser(description=('Throw in an integer N to'
                                                  'transform it into a'
                                                  'palindrome'))
    parser.add_argument('-i',
                        '--integer',
                        required=True,
                        help='The integer to be transformed.',
                        type=int)
    # NOTE: The argument must be an integer. Because of this constrain integers
    # with leading zeroes will be stripped automatically in python 3. Also the
    # script only allows integers as an input defined by type=int
    args = parser.parse_args()
    return args


def main():
    args = parse_args()
    if args.integer <= 10000 and args.integer > 0:
        print('Input integer is: {}'.format(args.integer))
        transform = Transform()
        palindrome = transform.palindrome(args.integer)
        if palindrome == transform.INVALID_RETURN_VALUE:
            print('Palindrome to be calculated is to big. Abort!')
        print("Final Output is:", palindrome)
        return palindrome
    else:
        print("Input integer is not betweent 1 and 10000")


if __name__ == '__main__':
    main()