#
#    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 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 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.resource import clsinit_copy
from nepi.resources.ns3.ns3base import NS3Base

@clsinit_copy
class NS3BaseApplication(NS3Base):
    _rtype = "abstract::ns3::Application"

    def _connect_object(self):
        node = self.node
        if node and node.uuid not in self.connected:
            self.simulator.invoke(node.uuid, "AddApplication", self.uuid)
            self._connected.add(node.uuid)

    def do_start(self):
        if self.state == ResourceState.READY:
            self.info("Starting")

            # BUG: without doing this explicit call it doesn't start!!!
            # Shouldn't be enough to set the StartTime?
            self.simulator.invoke(self.uuid, "Start")
            
            self.set_started()
        else:
            msg = " Failed "
            self.error(msg, out, err)
            raise RuntimeError, msg

    def do_stop(self):
        if self.state == ResourceState.STARTED:
            # No need to do anything, simulator.Destroy() will stop every object
            self.info("Stopping command '%s'" % command)
            self.simulator.invoke(self.uuid, "Stop")
            self.set_stopped()