from django.core.management.base import BaseCommand, CommandError

from openslides.core.config import config
from openslides.core.exceptions import ConfigError, ConfigNotFound


class Command(BaseCommand):
    """
    Command to change OpenSlides config values.
    """
    help = 'Changes OpenSlides config values.'

    def add_arguments(self, parser):
        parser.add_argument(
            'key',
            help='Config key. See config_variables.py in every app.'
        )
        parser.add_argument(
            'value',
            help='New config value. For a falsy boolean use "False".'
        )

    def handle(self, *args, **options):
        if options['value'].lower() == 'false':
            options['value'] = False
        try:
            config[options['key']] = options['value']
        except (ConfigError, ConfigNotFound) as e:
            raise CommandError(str(e))
        self.stdout.write(
            self.style.SUCCESS('Config {key} successfully changed to {value}.'.format(
                key=options['key'], value=config[options['key']])))