#!/usr/bin/python

def main(args):

    import random
    from datafile import composer, characters

    if(not args.composer == ''):
        print( random.choice(composer[args.composer.upper()] ) )
    elif( not args.videochar == '' ):
        print( random.choice(characters[args.videochar.upper()] ) )
    else:
        print('Choose a valid input: -c or -a')


def parse_input( help_message ):

    import argparse, sys

    parser = argparse.ArgumentParser (
      prog = 'python '+ sys.argv[0],
      description =    help_message,
      formatter_class = argparse.RawTextHelpFormatter,
    )

    parser.add_argument('-c','--composer',
                      type    = str,
                      default = '',
                      help    =
''' Last name for composer.
(default: empty)''')

    parser.add_argument('-v','--videochar',
                      type    = str,
                      default = '',
                      help    =
''' Last name for composer.
(default: empty)''')


    return parser.parse_args()

if __name__ == '__main__':
    """ Choose a random composer based on an input letter."""

    # Parse input arguments
    args = parse_input( main.__doc__ )
#   print(args)
#   print('')

    main( args )