#!/usr/bin/env python
#
#    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.ec import ExperimentController 
from nepi.execution.resource import ResourceState, ResourceAction
from nepi.execution.trace import TraceAttr

from test_utils import skipIfNotAlive

import os
import time
import unittest

def add_ns3_node(ec, simu):
    node = ec.register_resource("ns3::Node")
    ec.set(node, "enableStack", True)
    ec.register_connection(node, simu)

    return node

def add_fd_device(ec, node, ip, prefix):
    dev = ec.register_resource("ns3::FdNetDevice")
    ec.set(dev, "ip", ip)
    ec.set(dev, "prefix", prefix)
    ec.register_connection(node, dev)

    return dev

def add_tap_device(ec, node, ip, prefix):
    dev = ec.register_resource("linux::Tap")
    ec.set(dev, "ip", ip)
    ec.set(dev, "prefix", prefix)
    ec.register_connection(node, dev)
    
    return dev

def add_point2point_device(ec, node, ip, prefix):
    dev = ec.register_resource("ns3::PointToPointNetDevice")
    ec.set(dev, "ip", ip)
    ec.set(dev, "prefix", prefix)
    ec.register_connection(node, dev)

    queue = ec.register_resource("ns3::DropTailQueue")
    ec.register_connection(dev, queue)

    return dev

class LinuxNS3FdNetDeviceTest(unittest.TestCase):
    def setUp(self):
        self.fedora_host = "nepi2.pl.sophia.inria.fr"
        self.fedora_user = "inria_nepi"
        self.fedora_identity = "%s/.ssh/id_rsa_planetlab" % (os.environ['HOME'])

        self.ubuntu_host = "roseval.pl.sophia.inria.fr"
        self.ubuntu_user = "inria_nepi"
        self.ubuntu_identity = "%s/.ssh/id_rsa" % (os.environ['HOME'])

    @skipIfNotAlive
    def t_cross_tunnel_ping(self, host, user = None, identity = None):
        ec = ExperimentController(exp_id = "test-linux-ns3-tap-fd")
        
        node1 = ec.register_resource("linux::Node")
        ec.set(node1, "hostname", "localhost")
        ec.set(node1, "cleanProcesses", True)
        ec.set(node1, "cleanExperiment", True)
 
        simu1 = ec.register_resource("linux::ns3::Simulation")
        ec.set(simu1, "simulatorImplementationType", "ns3::RealtimeSimulatorImpl")
        ec.set(simu1, "checksumEnabled", True)
        ec.set(simu1, "verbose", True)
        #ec.set(simu1, "buildMode", "debug")
        #ec.set(simu1, "nsLog", "FdNetDevice")
        ec.register_connection(simu1, node1)

        nsnode1 = ec.register_resource("ns3::Node")
        ec.set(nsnode1, "enableStack", True)
        ec.register_connection(nsnode1, simu1)

        fddev1 = ec.register_resource("ns3::FdNetDevice")
        ec.set(fddev1, "ip", "10.0.0.1")
        ec.set(fddev1, "prefix", "30")
        ec.register_connection(nsnode1, fddev1)
       
        node2 = ec.register_resource("linux::Node")
        ec.set(node2, "hostname", host)
        ec.set(node2, "username", user)
        ec.set(node2, "identity", identity)
        ec.set(node2, "cleanProcesses", True)
        ec.set(node2, "cleanExperiment", True)

        simu2 = ec.register_resource("linux::ns3::Simulation")
        ec.set(simu2, "simulatorImplementationType", "ns3::RealtimeSimulatorImpl")
        ec.set(simu2, "checksumEnabled", True)
        ec.set(simu2, "verbose", True)
        #ec.set(simu2, "buildMode", "debug")
        #ec.set(simu2, "nsLog", "FdNetDevice")
        ec.register_connection(simu2, node2)

        nsnode2 = ec.register_resource("ns3::Node")
        ec.set(nsnode2, "enableStack", True)
        ec.register_connection(nsnode2, simu2)

        fddev2 = ec.register_resource("ns3::FdNetDevice")
        ec.set(fddev2, "ip", "10.0.0.2")
        ec.set(fddev2, "prefix", "30")
        ec.register_connection(nsnode2, fddev2)

        tunnel = ec.register_resource("linux::ns3::FdUdpTunnel")
        ec.register_connection(tunnel, fddev1)
        ec.register_connection(tunnel, fddev2)

        ping = ec.register_resource("ns3::V4Ping")
        ec.set (ping, "Remote", "10.0.0.2")
        ec.set (ping, "Interval", "1s")
        ec.set (ping, "Verbose", True)
        ec.set (ping, "StartTime", "0s")
        ec.set (ping, "StopTime", "20s")
        ec.register_connection(ping, nsnode1)

        ec.deploy()

        ec.wait_finished([ping])
        
        stdout = ec.trace(simu1, "stdout") 

        expected = "20 packets transmitted, 20 received, 0% packet loss"
        self.assertTrue(stdout.find(expected) > -1)

        ec.shutdown()

    def ztest_cross_ping_fedora(self):
        self.t_cross_ping(self.fedora_host, self.fedora_user, self.fedora_identity)

    def test_cross_tunnel_ping_ubuntu(self):
        self.t_cross_tunnel_ping(self.ubuntu_host, self.ubuntu_user, self.ubuntu_identity)


if __name__ == '__main__':
    unittest.main()