# -*- coding: utf-8 -*-

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import typing

import argmagiq.parsers.data_type_parser as data_type_parser
import argmagiq.value_spec as value_spec


__author__ = "Patrick Hohenecker"
__copyright__ = "Copyright (c) 2020, Patrick Hohenecker"
__license__ = "BSD-2-Clause"
__version__ = "0.1.0"
__date__ = "29 Jun 2020"
__maintainer__ = "Patrick Hohenecker"
__email__ = "patrick.hohenecker@gmx.at"
__status__ = "Development"


class BoolParser(data_type_parser.DataTypeParser):
    """A parser for configuration values of type ``bool``."""

    def __init__(self, spec: value_spec.ValueSpec):
        """Creates a new ``BoolParser`` for the provided :class:`value_spec.ValueSpec`.

        Args:
            spec (:class:`value_spec.ValueSpec`): The specification of the value to parse.
        """

        super().__init__(spec)

        if self._spec.default_value:
            self._arg_name = "--no" + self._arg_name[1:]

    #  PROPERTIES  #####################################################################################################

    @property
    def synopsis(self) -> typing.Tuple[str, str]:

        return self._arg_name, self._spec.description

    #  METHODS  ########################################################################################################

    def _parse(self, argv: typing.Tuple[str, ...]) -> typing.Tuple[typing.Any, typing.Tuple[str, ...]]:

        return not self._spec.default_value, argv[1:]
