# Copyright: (c) 2018, Toshio Kuratomi <tkuratomi@ansible.com>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

"""
Hold command line arguments for use in other modules
"""

from abc import ABCMeta

from ansible.module_utils.common._collections_compat import (Container, Mapping, Sequence, Set)
from ansible.module_utils.common.collections import ImmutableDict
from ansible.module_utils.six import add_metaclass, binary_type, text_type
from ansible.utils.singleton import Singleton


def _make_immutable(obj):
    """Recursively convert a container and objects inside of it into immutable data types"""
    if isinstance(obj, (text_type, binary_type)):
        # Strings first because they are also sequences
        return obj
    elif isinstance(obj, Mapping):
        temp_dict = {}
        for key, value in obj.items():
            if isinstance(value, Container):
                temp_dict[key] = _make_immutable(value)
            else:
                temp_dict[key] = value
        return ImmutableDict(temp_dict)
    elif isinstance(obj, Set):
        temp_set = set()
        for value in obj:
            if isinstance(value, Container):
                temp_set.add(_make_immutable(value))
            else:
                temp_set.add(value)
        return frozenset(temp_set)
    elif isinstance(obj, Sequence):
        temp_sequence = []
        for value in obj:
            if isinstance(value, Container):
                temp_sequence.append(_make_immutable(value))
            else:
                temp_sequence.append(value)
        return tuple(temp_sequence)

    return obj


class _ABCSingleton(Singleton, ABCMeta):
    """
    Combine ABCMeta based classes with Singleton based classes

    Combine Singleton and ABCMeta so we have a metaclass that unambiguously knows which can override
    the other.  Useful for making new types of containers which are also Singletons.
    """
    pass


class CLIArgs(ImmutableDict):
    """Hold a parsed copy of cli arguments"""
    def __init__(self, mapping):
        toplevel = {}
        for key, value in mapping.items():
            toplevel[key] = _make_immutable(value)
        super(CLIArgs, self).__init__(toplevel)

    @classmethod
    def from_options(cls, options):
        return cls(vars(options))


@add_metaclass(_ABCSingleton)
class GlobalCLIArgs(CLIArgs):
    """
    Globally hold a parsed copy of cli arguments.

    Only one of these exist per program as it is for global context
    """
    pass