#!/usr/bin/python2 -tt
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

from functools import partial
from inspect import getmembers

from ansible.playbook import Attribute, FieldAttribute
class Base:
    def __init__(self):
        self._attributes = dict()

        for (name, value) in self._get_base_attributes().items():
            getter = partial(self._generic_g, name)
            setter = partial(self._generic_s, name)
            deleter = partial(self._generic_d, name)
            setattr(Base, name, property(getter, setter, deleter))
            setattr(self, name, value.default)

    @staticmethod
    def _generic_g(key, self):
        return self._attributes[key]

    @staticmethod
    def _generic_s(key, self, value):
        self._attributes[key] = value

    @staticmethod
    def _generic_d(key, self):
        del self._attributes[key]

    # Verbatim from playbook/base.py::Base
    def _get_base_attributes(self):
        '''
        Returns the list of attributes for this class (or any subclass thereof).
        If the attribute name starts with an underscore, it is removed
        '''
        base_attributes = dict()
        for (name, value) in getmembers(self.__class__):
            if isinstance(value, Attribute):
               if name.startswith('_'):
                   name = name[1:]
               base_attributes[name] = value
        return base_attributes

class FakeTask(Base):
    _args                 = FieldAttribute(isa='dict', default=dict())
    _action               = FieldAttribute(isa='string')
    _loop                 = FieldAttribute(isa='string', private=True)
    _retries              = FieldAttribute(isa='int', default=1, private=False)


if __name__ == '__main__':
    t = FakeTask()
    print(t.args)
    t.args = dict(one=1, two=2, three=3)
    print(t.args)
    t.args['four'] = 4
    print(t.args)
    print(t.action)
    print(t.loop)
    print(t.retries)