# -*- coding: utf-8 -*-
# Copyright (C) 2018 Team tiramisu (see AUTHORS for all contributors)
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# The original `Config` design model is unproudly borrowed from
# the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
# the whole pypy projet is under MIT licence
# ____________________________________________________________
from ..setting import undefined, OptionBag


class DynSymLinkOption(object):
    __slots__ = ('_rootpath', 
                 '_opt',
                 '_suffix')

    def __init__(self,
                 opt,
                 rootpath,
                 suffix):
        self._opt = opt
        self._rootpath = rootpath
        self._suffix = suffix

    def __getattr__(self,
                    name):
        return getattr(self._opt, name)

    def __eq__(self, left):
        if not isinstance(left, DynSymLinkOption):
            return False
        return self._opt == left._opt and \
                self._rootpath == left._rootpath and \
                self._suffix == left._suffix

    def impl_getname(self):
        return self._opt.impl_getname() + self._suffix

    def impl_get_display_name(self):
        return self._opt.impl_get_display_name(dyn_name=self.impl_getname())

    def impl_getsuffix(self):
        return self._suffix

    def impl_getpath(self):
        return self._rootpath + '.' + self.impl_getname()

    def impl_validate(self,
                      value,
                      option_bag,
                      check_error=True):
        context = option_bag.config_bag.context
        soption_bag = OptionBag()
        soption_bag.set_option(self._opt,
                               self.impl_getpath(),
                               option_bag.index,
                               option_bag.config_bag)
        soption_bag.ori_option = option_bag.option
        soption_bag.fromconsistency = option_bag.fromconsistency.copy()
        self._opt.impl_validate(value,
                                soption_bag,
                                check_error=check_error)

    def impl_is_dynsymlinkoption(self):
        return True