#
#    NEPI, a framework to manage network experiments
#    Copyright (C) 2014 INRIA
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License version 2 as
#    published by the Free Software Foundation;
#
#    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 General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Author: Alina Quereilhac <alina.quereilhac@inria.fr>

from nepi.execution.attribute import Attribute, Flags, Types
from nepi.execution.resource import clsinit_copy
from nepi.resources.netns.netnsbase import NetNSBase

@clsinit_copy
class NetNSIPv4Address(NetNSBase):
    _rtype = "netns::IPv4Address"

    @classmethod
    def _register_attributes(cls):
        ip = Attribute("ip", "IPv4 address", flags=Flags.Design)
        prefix = Attribute("prefix", "IPv4 prefix", flags=Flags.Design)

        cls._register_attribute(ip)
        cls._register_attribute(prefix)

    @property
    def emulation(self):
        return self.node.emulation

    @property
    def node(self):
        return self.interface.node

    @property
    def interface(self):
        from nepi.resources.netns.netnsinterface import NetNSInterface
        interface = self.get_connected(NetNSInterface.get_rtype())

        if not interface: 
            msg = "IPv4Address not connected to Interface!!"
            self.error(msg)
            raise RuntimeError(msg)

        return interface[0]

    @property
    def _rms_to_wait(self):
        return [self.interface]

    def _instantiate_object(self):
        self._uuid = self.emulation.invoke(self.interface.uuid, "add_v4_address",
                self.get("ip"), self.get("prefix"))