#!/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'])

    @skipIfNotAlive
    def t_cross_ccnpeek(self, host, user = None, identity = None):
        ec = ExperimentController(exp_id = "test-linux-ns3-ccnpeek")
        
        node = ec.register_resource("linux::Node")
        if host == "localhost":
            ec.set(node, "hostname", "localhost")
        else:
            ec.set(node, "hostname", host)
            ec.set(node, "username", user)
            ec.set(node, "identity", identity)
        
        ec.set(node, "cleanProcesses", True)
        ec.set(node, "cleanExperiment", True)

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

        nsnode = add_ns3_node(ec, simu)

        fddev = add_fd_device(ec, nsnode, "10.0.0.2", "30")
        ec.enable_trace(fddev, "pcap")
        ec.enable_trace(fddev, "promiscPcap")
        ec.enable_trace(fddev, "ascii")

        tap = add_tap_device(ec, node, "10.0.0.1", "30")

        crosslink = ec.register_resource("linux::ns3::TunTapFdLink")
        ec.register_connection(crosslink, tap)
        ec.register_connection(crosslink, fddev)

        ### create DCE applications
        ccnd1 = ec.register_resource("linux::ns3::dce::CCND")
        ec.set(ccnd1, "stackSize", 1<<20)
        ec.set(ccnd1, "StartTime", "1s")
        ec.register_connection(ccnd1, nsnode)

        poke = ec.register_resource("linux::ns3::dce::CCNPoke")
        ec.set(poke, "contentName", "ccnx:/chunk0")
        ec.set(poke, "content", "DATA")
        ec.set(poke, "stackSize", 1<<20)
        ec.set(poke, "StartTime", "4s")
        ec.register_connection(poke, nsnode)

        fib1 = ec.register_resource("linux::ns3::dce::FIBEntry")
        ec.set(fib1, "protocol", "udp") 
        ec.set(fib1, "uri", "ccnx:/") 
        ec.set(fib1, "host", "10.0.0.1")
        ec.set(fib1, "stackSize", 1<<20)
        ec.set(fib1, "StartTime", "2s")
        ec.register_connection(fib1, nsnode)

        ### create Linux applications
        ccnd2 = ec.register_resource("linux::CCND")
        ec.register_connection(ccnd2, node)

        peek = ec.register_resource("linux::CCNPeek")
        ec.set(peek, "contentName", "ccnx:/chunk0")
        ec.register_connection(peek, ccnd2)
        
        fib2 = ec.register_resource("linux::FIBEntry")
        ec.set(fib2, "protocol", "udp") 
        ec.set(fib2, "uri", "ccnx:/") 
        ec.set(fib2, "host", "10.0.0.2")
        ec.register_connection(fib2, ccnd2)

        ec.register_condition(peek, ResourceAction.START, poke,
            ResourceState.STARTED)
 
        ec.deploy()

        ec.wait_finished([peek])

        stdout = ec.trace(peek, "stdout")
        expected = "DATA"
        self.assertTrue(stdout.find(expected) > -1)

        ec.shutdown()

    @skipIfNotAlive
    def t_cross_ccncat(self, host, user = None, identity = None):
        ec = ExperimentController(exp_id = "test-linux-ns3-ccncat")
        
        node = ec.register_resource("linux::Node")
        if host == "localhost":
            ec.set(node, "hostname", "localhost")
        else:
            ec.set(node, "hostname", host)
            ec.set(node, "username", user)
            ec.set(node, "identity", identity)
        
        ec.set(node, "cleanProcesses", True)
        ec.set(node, "cleanExperiment", True)

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

        nsnode = add_ns3_node(ec, simu)

        fddev = add_fd_device(ec, nsnode, "10.0.0.2", "30")
        ec.enable_trace(fddev, "pcap")
        ec.enable_trace(fddev, "promiscPcap")
        ec.enable_trace(fddev, "ascii")

        tap = add_tap_device(ec, node, "10.0.0.1", "30")

        crosslink = ec.register_resource("linux::ns3::TunTapFdLink")
        ec.register_connection(crosslink, tap)
        ec.register_connection(crosslink, fddev)

        ### create DCE applications
        ccnd1 = ec.register_resource("linux::ns3::dce::CCND")
        ec.set(ccnd1, "stackSize", 1<<20)
        ec.set(ccnd1, "StartTime", "1s")
        ec.register_connection(ccnd1, nsnode)

        repofile = os.path.join(
            os.path.dirname(os.path.realpath(__file__)),
            "ccn", 
            "repoFile1")

        ccnr = ec.register_resource("linux::ns3::dce::CCNR")
        ec.set (ccnr, "repoFile1", repofile) 
        ec.set (ccnr, "stackSize", 1<<20)
        ec.set (ccnr, "StartTime", "2s")
        ec.set (ccnr, "StopTime", "4s")
        ec.register_connection(ccnr, nsnode)

        fib1 = ec.register_resource("linux::ns3::dce::FIBEntry")
        ec.set(fib1, "protocol", "udp") 
        ec.set(fib1, "uri", "ccnx:/") 
        ec.set(fib1, "host", "10.0.0.1")
        ec.set(fib1, "stackSize", 1<<20)
        ec.set(fib1, "StartTime", "2s")
        ec.register_connection(fib1, nsnode)

        ### create Linux applications
        ccnd2 = ec.register_resource("linux::CCND")
        ec.register_connection(ccnd2, node)

        ccncat = ec.register_resource("linux::CCNCat")
        ec.set(ccncat, "contentName", "ccnx:/test/bunny.ts")
        ec.register_connection(ccncat, ccnd2)
        """
       
        peek = ec.register_resource("linux::CCNPeek")
        ec.set(peek, "contentName", "ccnx:/test/bunny.ts")
        ec.register_connection(peek, ccnd2)
        """

        fib2 = ec.register_resource("linux::FIBEntry")
        ec.set(fib2, "protocol", "udp") 
        ec.set(fib2, "uri", "ccnx:/") 
        ec.set(fib2, "host", "10.0.0.2")
        ec.register_connection(fib2, ccnd2)

        ec.register_condition(ccncat, ResourceAction.START, ccnr,
            ResourceState.STARTED)
 
        ec.deploy()

        #ec.wait_finished([ccncat])
        import time
        time.sleep(80)

        stdout = ec.trace(ccncat, "stdout")
        f = open("bunny.ts", "w")
        f.write(stdout)
        f.close()

        #expected = "DATA"
        #self.assertTrue(stdout.find(expected) > -1)

        ec.shutdown()

    def ztest_cross_ccnpeek_fedora(self):
        self.t_cross_cnnpeek(self.fedora_host, self.fedora_user, self.fedora_identity)

    def test_cross_ccnpeek_local(self):
        self.t_cross_ccnpeek("localhost")

    def test_cross_ccncat_local(self):
        self.t_cross_ccncat("localhost")

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