import click
import sys
import time


def build_settings_option_class(settings_instance):
    def set_default(default_name):
        class Cls(click.Option):
            def __init__(self, *args, **kwargs):
                kwargs['default'] = getattr(settings_instance, default_name)
                super(Cls, self).__init__(*args, **kwargs)

            def handle_parse_result(self, ctx, opts, args):
                obj = ctx.find_object(type(settings_instance))
                if obj is None:
                    ctx.obj = settings_instance

                return super(Cls, self).handle_parse_result(ctx, opts, args)

        return Cls

    return set_default


class Settings(object):
    def __init__(self):
        self.instance_disk_size = 100
        self.instance_disk_type = 'pd-ssd'


# import pudb; pudb.set_trace()
settings = Settings()
settings_option_cls = build_settings_option_class(settings)
pass_settings = click.make_pass_decorator(Settings)


@click.command()
@click.help_option('-h', '--help')
@click.option(
    '-s',
    '--disk-size',
    cls=settings_option_cls('instance_disk_size'),
    help="Disk size",
    show_default=True,
    type=int,
)
@click.option(
    '-t',
    '--disk-type',
    cls=settings_option_cls('instance_disk_type'),
    help="Disk type",
    show_default=True,
    type=click.Choice(['pd-standard', 'pd-ssd']),
)
@pass_settings
def create(settings_test, disk_size, disk_type):
    print(f'{settings_test.instance_disk_type=}')
    # print(f'{dir(settings_test)=}')
    print(disk_size)
    print(disk_type)


if __name__ == "__main__":
    commands = (
        '-t pd-standard -s 200',
        '-t pd-standard',
        '-s 200',
        '',
        '--help',
    )

    time.sleep(1)
    print('Click Version: {}'.format(click.__version__))
    print('Python Version: {}'.format(sys.version))
    for cmd in commands:
        try:
            time.sleep(0.1)
            print('-----------')
            print('> ' + cmd)
            time.sleep(0.1)
            create(cmd.split())

        except BaseException as exc:
            if str(exc) != '0' and not isinstance(
                exc, (click.ClickException, SystemExit)
            ):
                raise