# Copyright (C) 2015 Nippon Telegraph and Telephone Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from __future__ import absolute_import

import sys
import time
import unittest

from fabric.api import local
import nose

from lib.noseplugin import OptionParser, parser_option

from lib import base
from lib.base import BGP_FSM_ESTABLISHED
from lib.gobgp import GoBGPContainer


class GoBGPTestBase(unittest.TestCase):

    @classmethod
    def setUpClass(cls):
        gobgp_ctn_image_name = parser_option.gobgp_image
        base.TEST_PREFIX = parser_option.test_prefix

        g1 = GoBGPContainer(name='g1', asn=65000, router_id='192.168.0.1',
                            ctn_image_name=gobgp_ctn_image_name,
                            log_level=parser_option.gobgp_log_level,
                            zebra=True, zapi_version=3)

        g2 = GoBGPContainer(name='g2', asn=65001, router_id='192.168.0.2',
                            ctn_image_name=gobgp_ctn_image_name,
                            log_level=parser_option.gobgp_log_level,
                            zebra=True, zapi_version=3)

        initial_wait_time = max(ctn.run() for ctn in [g1, g2])

        time.sleep(initial_wait_time)

        g1.add_peer(g2, vpn=True)
        g2.add_peer(g1, vpn=True)

        cls.g1 = g1
        cls.g2 = g2

    def test_01_neighbor_established(self):
        self.g1.wait_for(expected_state=BGP_FSM_ESTABLISHED, peer=self.g2)

    def test_02_create_vrf(self):
        self.g1.local('ip netns add ns01')
        self.g1.local('ip netns add ns02')
        self.g2.local('ip netns add ns01')
        self.g2.local('ip netns add ns02')

        self.g1.local('ip netns exec ns01 ip li set up dev lo')
        self.g1.local('ip netns exec ns02 ip li set up dev lo')
        self.g2.local('ip netns exec ns01 ip li set up dev lo')
        self.g2.local('ip netns exec ns02 ip li set up dev lo')

        self.g1.local("vtysh -c 'enable' -c 'conf t' -c 'vrf 1 netns ns01'")
        self.g1.local("vtysh -c 'enable' -c 'conf t' -c 'vrf 2 netns ns02'")
        self.g2.local("vtysh -c 'enable' -c 'conf t' -c 'vrf 1 netns ns01'")
        self.g2.local("vtysh -c 'enable' -c 'conf t' -c 'vrf 2 netns ns02'")

        self.g1.local("gobgp vrf add vrf01 id 1 rd 1:1 rt both 1:1")
        self.g1.local("gobgp vrf add vrf02 id 2 rd 2:2 rt both 2:2")
        self.g2.local("gobgp vrf add vrf01 id 1 rd 1:1 rt both 1:1")
        self.g2.local("gobgp vrf add vrf02 id 2 rd 2:2 rt both 2:2")

        self.g1.local("gobgp vrf vrf01 rib add 10.0.0.0/24 nexthop 127.0.0.1")
        self.g1.local("gobgp vrf vrf02 rib add 20.0.0.0/24 nexthop 127.0.0.1")

        time.sleep(2)

        lines = self.g2.local("ip netns exec ns01 ip r", capture=True).split('\n')
        self.assertEqual(len(lines), 1)
        self.assertEqual(lines[0].split(' ')[0], '10.0.0.0/24')

        lines = self.g2.local("ip netns exec ns02 ip r", capture=True).split('\n')
        self.assertEqual(len(lines), 1)
        self.assertEqual(lines[0].split(' ')[0], '20.0.0.0/24')


if __name__ == '__main__':
    output = local("which docker 2>&1 > /dev/null ; echo $?", capture=True)
    if int(output) is not 0:
        print "docker not found"
        sys.exit(1)

    nose.main(argv=sys.argv, addplugins=[OptionParser()],
              defaultTest=sys.argv[0])