import argparse
from string import ascii_lowercase

import cmd2

from dictionary import DEFAULT, ALTERNATE
LOWERCASE = set(ascii_lowercase)
DICTS = {
    'default': DEFAULT,
    'alt': ALTERNATE,
}
# argparsers
dictionary_manage_parser = argparse.ArgumentParser()
commands = dictionary_manage_parser.add_mutually_exclusive_group()
commands.add_argument(
    '-l', '--list', action='store_true', help='List available dictionaries')
commands.add_argument(
    '-s', '--switch', help='Dictionary to swap to')

letter_set_manage = argparse.ArgumentParser()
letter_set_manage.add_argument('new_letters')


class MainLoop(cmd2.Cmd):
    """Loop for wordscape commands

    """
    prompt = "?$ "

    def __init__(self):
        self.dict = 'default'
        self.letters = [l for l in input(
            "Enter letters: ").lower() if l in LOWERCASE]
        self.prompt = ', '.join(self.letters) + ' ' + MainLoop.prompt
        super().__init__()

    @cmd2.with_argparser(dictionary_manage_parser)
    def do_dict(self, args):
        """list/switch dict"""
        if args.list:
            print('\n'.join(
                ('{} {}'.format('*' if key == self.dict else ' ',
                                key) for key in DICTS.keys())))
        else:
            DICTS[args.switch]
            self.dict = args.switch

    @cmd2.with_argparser(letter_set_manage)
    def do_change_letters(self, args):
        pass


if __name__ == "__main__":
    MainLoop().cmdloop()