#
#    NEPI, a framework to manage network experiments
#    Copyright (C) 2013 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, ResourceState, \
    reschedule_delay
from nepi.resources.linux.application import LinuxApplication
from nepi.resources.linux.ccn.ccnd import LinuxCCND
from nepi.util.timefuncs import tnow, tdiffsec

import os

@clsinit_copy
class LinuxCCNApplication(LinuxApplication):
    _rtype = "LinuxCCNApplication"

    def __init__(self, ec, guid):
        super(LinuxCCNApplication, self).__init__(ec, guid)
        self._home = "ccnapp-%s" % self.guid

    @property
    def ccnd(self):
        ccnd = self.get_connected(LinuxCCND.rtype())
        if ccnd: return ccnd[0]
        return None

    @property
    def node(self):
        if self.ccnd: return self.ccnd.node
        return None

    def deploy(self):
        if not self.ccnd or self.ccnd.state < ResourceState.READY:
            self.debug("---- RESCHEDULING DEPLOY ---- node state %s " % self.node.state )
            self.ec.schedule(reschedule_delay, self.deploy)
        else:
            try:
                command = self.get("command") or ""

                self.info("Deploying command '%s' " % command)
                
                if not self.get("env"):
                    self.set("env", self._environment)

                self.discover()
                self.provision()
            except:
                self.fail()
                raise
 
            self.debug("----- READY ---- ")
            self.set_ready()

    @property
    def _environment(self):
        return self.ccnd.path
       
    def valid_connection(self, guid):
        # TODO: Validate!
        return True