#!/usr/bin/python3

import sys
import argparse
from .miniconf import Miniconf


def main():
    """ Main program entry point. """
    parser = argparse.ArgumentParser(
        description='Miniconf command line interface.',
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog='''Examples:
%(prog)s dt/sinara/dual-iir/00-11-22-33-aa-bb iir_ch/0/0=\
'{"y_min":-32767,"y_max":32767,"y_offset":0,"ba":[1.0,0,0,0,0]}'
%(prog)s dt/sinara/lockin/00-11-22-33-aa-bb afe/0='"G2"'\
''')
    parser.add_argument('-v', '--verbose', action='count', default=0,
                        help='Increase logging verbosity')
    parser.add_argument('--broker', '-b', default='mqtt', type=str,
                        help='The MQTT broker address')
    parser.add_argument('--no-retain', '-n', default=False,
                        action='store_true',
                        help='Do not retain the affected settings')
    parser.add_argument('prefix', type=str,
                        help='The MQTT topic prefix of the target')
    parser.add_argument('settings', metavar="PATH=VALUE", nargs='+',
                        help='JSON encoded values for settings path keys.')

    args = parser.parse_args()

    logging.basicConfig(
        format='%(asctime)s [%(levelname)s] %(name)s: %(message)s',
        level=logging.WARN - 10*args.verbose)

    loop = asyncio.get_event_loop()

    async def configure_settings():
        interface = await Miniconf.create(args.prefix, args.broker)
        for setting in args.settings:
            path, value = setting.split("=", 1)
            response = await interface.command(path, json.loads(value),
                                               not args.no_retain)
            print(f'{path}: {response}')
            if response['code'] != 0:
                return response['code']
        return 0

    sys.exit(loop.run_until_complete(configure_settings()))


if __name__ == '__main__':
    main()