#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
normalize columns
"""

# imports
import sys

# module globals
__all__ = ['main', 'NormalizationParser']

class Parser(argparse.ArgumentParser):
    """CLI option parser"""
    def __init__(self, **kwargs):
        kwargs.setdefault('formatter_class', argparse.RawTextHelpFormatter)
        kwargs.setdefault('description', __doc__)
        argparse.ArgumentParser.__init__(self, **kwargs)
        self.add_argument('--monitor', dest='monitor',
                          type=float, metavar='SLEEP',
                          help="run in monitor mode")
        self.options = None

    def parse_args(self, *args, **kw):
        options = argparse.ArgumentParser.parse_args(self, *args, **kw)
        self.validate(options)
        self.options = options
        return options

    def validate(self, options):
        """validate options"""

def main(args=sys.argv[1:]):
    """CLI"""

    # parse command line options
    parser = Parser()
    options = parser.parse_args(args)

    try:
        while True:
            if options.monitor:
                time.sleep(options.monitor)
            else:
                break
    except KeyboardInterrupt:
        pass

if __name__ == '__main__':
    main()