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import argparse

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import logging; log = logging.getLogger('qmsk.args')

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import sys

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def parser (**opts):

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    parser = argparse.ArgumentParser(**opts)

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    args = parser.add_argument_group("Generic options")

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    args.add_argument('-q', '--quiet',      dest='log_level', action='store_const', const=logging.ERROR,

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            help="Less output")

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    args.add_argument('-v', '--verbose',    dest='log_level', action='store_const', const=logging.INFO,

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            help="More output")

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    args.add_argument('-D', '--debug-all',  dest='log_level', action='store_const', const=logging.DEBUG,

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            help="Most output")

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    args.add_argument('-d', '--debug-module',   dest='log_debug', action='append',

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            help="Debugging output for given module")

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    parser.set_defaults(

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            log_level       = logging.WARNING,

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            log_debug       = [ ],

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    )

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    return parser

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def parse (parser, argv):

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    """

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        Parse given sys.argv using the ArgumentParser returned by parser()

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    """

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    args = parser.parse_args(argv[1:])

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    logging.basicConfig(

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            format      = "{levelname:<8} {name:>30}:{funcName:<20}: {message}",

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            style       = '{',

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            level       = args.log_level,

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    )

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    for logger in args.log_debug:

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        logging.getLogger(logger).setLevel(logging.DEBUG)

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    log.debug(args)

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    return args

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def main (main):

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    """

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        Run given main(argv) which returns exit status.

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    """

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    sys.exit(main(sys.argv))