#!/usr/bin/python
import argparse
import sys
sys.path.append('..')
from mininet.topo import Topo
from mininet.cli import CLI
from mininet.log import setLogLevel
from mininet.node import OVSBridge, OVSSwitch
from mininet.nodelib import NAT
from ipaddress import ip_network
from routinglib import BgpRouter
from routinglib import RoutedHost
from trellislib import DhcpClient, DhcpServer
from trellislib import DualHomedDhcpClient
from trellislib import DualHomedDhcp4and6Client
from trellislib import get_mininet, set_up_zebra_config
from functools import partial

PIPECONF_ID = 'org.onosproject.pipelines.fabric'


class Trellis(Topo):
    """Trellis HAG topology with both OVS and BMV2 switches"""

    p4_cls = None

    def get_p4_switch_args(self, name):
        assert Trellis.p4_cls is not None
        return dict(
            name=name,
            cls=Trellis.p4_cls,
            pipeconf=PIPECONF_ID,
            portcfg=True,
            onosdevid="device:" + name)

    def __init__(self, *args, **kwargs):
        Topo.__init__(self, *args, **kwargs)

        # Spines
        s226 = self.addSwitch(**self.get_p4_switch_args('s226'))
        s227 = self.addSwitch('s227', dpid='227')

        # Leaves
        s203 = self.addSwitch('s203', dpid='203')
        s204 = self.addSwitch(**self.get_p4_switch_args('s204'))
        s205 = self.addSwitch('s205', dpid='205')
        s206 = self.addSwitch('s206', dpid='206')

        # Leaf-Spine Links
        self.addLink(s226, s203)
        self.addLink(s226, s203)
        self.addLink(s226, s204)
        self.addLink(s226, s204)
        self.addLink(s226, s205)
        self.addLink(s226, s205)
        self.addLink(s226, s206)
        self.addLink(s226, s206)
        self.addLink(s227, s203)
        self.addLink(s227, s203)
        self.addLink(s227, s204)
        self.addLink(s227, s204)
        self.addLink(s227, s205)
        self.addLink(s227, s205)
        self.addLink(s227, s206)
        self.addLink(s227, s206)

        # Leaf-Leaf Links
        self.addLink(s203, s204)
        self.addLink(s205, s206)

        # NOTE avoid using 10.0.1.0/24 which is the default subnet of quaggas
        # NOTE avoid using 00:00:00:00:00:xx which is the default mac of host behind upstream router
        # IPv4 Hosts
        h1 = self.addHost('h1', cls=DhcpClient, mac='00:aa:00:00:00:01')
        h2 = self.addHost('h2', cls=DhcpClient, mac='00:aa:00:00:00:02')
        h3 = self.addHost('h3', cls=DhcpClient, mac='00:aa:00:00:00:03')
        h4 = self.addHost('h4', cls=DhcpClient, mac='00:aa:00:00:00:04')
        h5 = self.addHost('h5', cls=DhcpClient, mac='00:aa:00:00:00:05')
        self.addLink(h1, s204)
        self.addLink(h2, s204)
        self.addLink(h3, s205)
        self.addLink(h4, s205)
        self.addLink(h5, s203)

        # IPv6 Hosts
        #h1v6 = self.addHost('h1v6', cls=Dhcp6Client, mac='00:bb:00:00:00:01')
        #h2v6 = self.addHost('h2v6', cls=Dhcp6Client, mac='00:bb:00:00:00:02')
        #h3v6 = self.addHost('h3v6', cls=Dhcp6Client, mac='00:bb:00:00:00:03')
        #h4v6 = self.addHost('h4v6', cls=Dhcp6Client, mac='00:bb:00:00:00:04')
        #h5v6 = self.addHost('h5v6', cls=Dhcp6Client, mac='00:bb:00:00:00:05')
        #self.addLink(h1v6, s204)
        #self.addLink(h2v6, s204)
        #self.addLink(h3v6, s205)
        #self.addLink(h4v6, s205)
        #self.addLink(h5v6, s203)

        # Dual-homed IPv4 and IPv6 Host on 203-204
        dh1 = self.addHost('dh1', cls=DualHomedDhcp4and6Client, mac='00:cc:00:00:00:01')
        self.addLink(dh1, s204)
        self.addLink(dh1, s203)

        # DHCP server
        dhcp = self.addHost('dhcp', cls=DhcpServer, mac='00:99:00:00:00:01', ips=['10.0.3.253/24'], gateway='10.0.3.254')

        # DHCPv6 server
        #dhcp6 = self.addHost('dhcp6', cls=Dhcp6Server, mac='00:99:66:00:00:01', ips=['2000::3fd/120'], gateway='2000::3ff')

        # Dataplane L2 plane switch (for DHCP servers)
        cs1 = self.addSwitch('cs1', cls=OVSBridge)
        self.addLink(cs1, s205)
        self.addLink(dhcp, cs1)
        #self.addLink(dhcp6, cs1)

        # Control plane switch (for quagga fpm)
        cs0 = self.addSwitch('cs0', cls=OVSBridge)

        # Control plane NAT (for quagga fpm)
        nat = self.addHost('nat', cls=NAT,
                           ip='172.16.0.1/24',
                           subnet=str(ip_network(u'172.16.0.0/24')), inNamespace=False)
        self.addLink(cs0, nat)

        # Internal Quagga bgp1
        """
        intfs = {'bgp1-eth0': [{'ipAddrs': ['10.0.1.2/24', '2000::102/120'], 'mac': '00:88:00:00:00:03', 'vlan': '110'},
                               {'ipAddrs': ['10.0.7.2/24', '2000::702/120'], 'mac': '00:88:00:00:00:03', 'vlan': '170'}],
                 'bgp1-eth1': {'ipAddrs': ['172.16.0.3/24']}}
        """
        intfs = {'bgp1-eth0': {'ipAddrs': ['10.0.1.2/24'], 'mac': '00:88:00:00:00:03', 'vlan': '110'},
                 'bgp1-eth1': {'ipAddrs': ['172.16.0.3/24']}}
        bgp1 = self.addHost('bgp1', cls=BgpRouter,
                            interfaces=intfs,
                            quaggaConfFile='./bgpdbgp1.conf',
                            zebraConfFile='./zebradbgp1.conf')
        self.addLink(bgp1, s205)
        self.addLink(bgp1, cs0)

        # Internal Quagga bgp2
        """
        intfs = {'bgp2-eth0': [{'ipAddrs': ['10.0.5.2/24', '2000::502/120'], 'mac': '00:88:00:00:00:04', 'vlan': '150'},
                               {'ipAddrs': ['10.0.6.2/24', '2000::602/120'], 'mac': '00:88:00:00:00:04', 'vlan': '160'}],
                 'bgp2-eth1': {'ipAddrs': ['172.16.0.4/24']}}
        """
        intfs = {'bgp2-eth0': {'ipAddrs': ['10.0.6.2/24'], 'mac': '00:88:00:00:00:04', 'vlan': '160'},
                 'bgp2-eth1': {'ipAddrs': ['172.16.0.4/24']}}
        bgp2 = self.addHost('bgp2', cls=BgpRouter,
                            interfaces=intfs,
                            quaggaConfFile='./bgpdbgp2.conf',
                            zebraConfFile='./zebradbgp2.conf')
        self.addLink(bgp2, s206)
        self.addLink(bgp2, cs0)

        # External Quagga r1
        intfs = {'r1-eth0': {'ipAddrs': ['10.0.1.1/24'], 'mac': '00:88:00:00:00:01'},
                 'r1-eth1': {'ipAddrs': ['10.0.99.1/16']}}
        r1 = self.addHost('r1', cls=BgpRouter,
                            interfaces=intfs,
                            quaggaConfFile='./bgpdr1.conf')
        self.addLink(r1, s205)
        #self.addLink(r1, s206)

        # External IPv4 Host behind r1
        rh1 = self.addHost('rh1', cls=RoutedHost, ips=['10.0.99.2/24'], gateway='10.0.99.1')
        self.addLink(r1, rh1)

        # External IPv6 Host behind r1
        #rh1v6 = self.addHost('rh1v6', cls=RoutedHost, ips=['2000::9902/120'], gateway='2000::9901')
        #self.addLink(r1, rh1v6)

        # Another external IPv6 Host behind r1
        #rh11v6 = self.addHost('rh11v6', cls=RoutedHost, ips=['2000::7702/120'], gateway='2000::7701')
        #self.addLink(r1, rh11v6)

        # External Quagga r2
        intfs = {'r2-eth0': {'ipAddrs': ['10.0.6.1/24'], 'mac': '00:88:00:00:00:02'},
                 'r2-eth1': {'ipAddrs': ['10.0.99.1/16']}}
        r2 = self.addHost('r2', cls=BgpRouter,
                            interfaces=intfs,
                            quaggaConfFile='./bgpdr2.conf')
        self.addLink(r2, s206)
        #self.addLink(r2, s205)

        # External IPv4 Host behind r2
        rh2 = self.addHost('rh2', cls=RoutedHost, ips=['10.0.99.2/24'], gateway='10.0.99.1')
        self.addLink(r2, rh2)

        # External IPv6 Host behind r2
        #rh2v6 = self.addHost('rh126', cls=RoutedHost, ips=['2000::9902/120'], gateway='2000::9901')
        #self.addLink(r2, rh2v6)

        # Another external IPv6 Host behind r1
        #rh22v6 = self.addHost('rh22v6', cls=RoutedHost, ips=['2000::8802/120'], gateway='2000::8801')
        #self.addLink(r2, rh22v6)

        # Dual-homed IPv4 Host for 205-206
        dh2 = self.addHost('dh2', cls=DualHomedDhcpClient, mac='00:cc:00:00:00:02')
        self.addLink(dh2, s205)
        self.addLink(dh2, s206)

        # ----- Secondary fabric -----

        # Spines(HAG)
        s246 = self.addSwitch(**self.get_p4_switch_args('s246'))
        s247 = self.addSwitch(**self.get_p4_switch_args('s247'))

        # Leaves(DAAS)
        s207 = self.addSwitch('s207', dpid='207')
        s208 = self.addSwitch(**self.get_p4_switch_args('s208'))

        # HAG-DAAS Links
        self.addLink(s246, s207)
        self.addLink(s246, s208)
        self.addLink(s247, s207)
        self.addLink(s247, s208)

        # HAG - Spine Links
        self.addLink(s246, s226)
        self.addLink(s247, s227)

        # IPv4 Hosts - RPDs
        rpd5 = self.addHost('rpd5', cls=DhcpClient, mac='00:dd:00:00:00:01')
        rpd6 = self.addHost('rpd6', cls=DhcpClient, mac='00:dd:00:00:00:02')
        self.addLink(rpd5, s207)
        self.addLink(rpd6, s208)

        # IPv6 Hosts - RPDs
        #rpd5v6 = self.addHost('rpd5v6', cls=Dhcp6Client, mac='00:ee:00:00:00:01')
        #rpd6v6 = self.addHost('rpd6v6', cls=Dhcp6Client, mac='00:ee:00:00:00:02')
        #self.addLink(rpd5v6, s207)
        #self.addLink(rpd6v6, s208)


topos = { 'trellis' : Trellis }

if __name__ == "__main__":
    setLogLevel('debug')

    parser = argparse.ArgumentParser(description="Trellis Arguments")
    parser.add_argument("-c", "--controllers", help = "Comma Separated List of ONOS controllers",
                        required = True, default = "")
    parser.add_argument("-a", "--p4runtime-agent", help = "P4Runtime agent to use on Bmv2 devices (pi or stratum)",
                        required = False, default = "pi")
    arguments = parser.parse_args()
    agent = arguments.p4runtime_agent

    if agent == "stratum":
        from stratum import ONOSStratumBmv2Switch
        Trellis.p4_cls = ONOSStratumBmv2Switch
    else:
        from bmv2 import ONOSBmv2Switch
        Trellis.p4_cls = ONOSBmv2Switch

    set_up_zebra_config(arguments.controllers)

    topo = Trellis()
    switch = partial(OVSSwitch, protocols='OpenFlow13')
    net = get_mininet(arguments, topo, switch)

    net.start()
    CLI(net)
    net.stop()