# This file is part of cloud-init. See LICENSE file for license information.

from unittest import mock

import pytest

from cloudinit import safeyaml
from cloudinit.net import network_state
from tests.unittests.helpers import CiTestCase

netstate_path = 'cloudinit.net.network_state'


_V1_CONFIG_NAMESERVERS = """\
network:
  version: 1
  config:
    - type: nameserver
      interface: {iface}
      address:
        - 192.168.1.1
        - 8.8.8.8
      search:
        - spam.local
    - type: nameserver
      address:
        - 192.168.1.0
        - 4.4.4.4
      search:
        - eggs.local
    - type: physical
      name: eth0
      mac_address: '00:11:22:33:44:55'
    - type: physical
      name: eth1
      mac_address: '66:77:88:99:00:11'
"""

V1_CONFIG_NAMESERVERS_VALID = _V1_CONFIG_NAMESERVERS.format(iface='eth1')
V1_CONFIG_NAMESERVERS_INVALID = _V1_CONFIG_NAMESERVERS.format(iface='eth90')

V2_CONFIG_NAMESERVERS = """\
network:
  version: 2
  ethernets:
    eth0:
      match:
        macaddress: '00:11:22:33:44:55'
      nameservers:
        search: [spam.local, eggs.local]
        addresses: [8.8.8.8]
    eth1:
      match:
        macaddress: '66:77:88:99:00:11'
      set-name: "ens92"
      nameservers:
        search: [foo.local, bar.local]
        addresses: [4.4.4.4]
"""


class TestNetworkStateParseConfig(CiTestCase):

    def setUp(self):
        super(TestNetworkStateParseConfig, self).setUp()
        nsi_path = netstate_path + '.NetworkStateInterpreter'
        self.add_patch(nsi_path, 'm_nsi')

    def test_missing_version_returns_none(self):
        ncfg = {}
        with self.assertRaises(RuntimeError):
            network_state.parse_net_config_data(ncfg)

    def test_unknown_versions_returns_none(self):
        ncfg = {'version': 13.2}
        with self.assertRaises(RuntimeError):
            network_state.parse_net_config_data(ncfg)

    def test_version_2_passes_self_as_config(self):
        ncfg = {'version': 2, 'otherconfig': {}, 'somemore': [1, 2, 3]}
        network_state.parse_net_config_data(ncfg)
        self.assertEqual([mock.call(version=2, config=ncfg)],
                         self.m_nsi.call_args_list)

    def test_valid_config_gets_network_state(self):
        ncfg = {'version': 2, 'otherconfig': {}, 'somemore': [1, 2, 3]}
        result = network_state.parse_net_config_data(ncfg)
        self.assertNotEqual(None, result)

    def test_empty_v1_config_gets_network_state(self):
        ncfg = {'version': 1, 'config': []}
        result = network_state.parse_net_config_data(ncfg)
        self.assertNotEqual(None, result)

    def test_empty_v2_config_gets_network_state(self):
        ncfg = {'version': 2}
        result = network_state.parse_net_config_data(ncfg)
        self.assertNotEqual(None, result)


class TestNetworkStateParseConfigV2(CiTestCase):

    def test_version_2_ignores_renderer_key(self):
        ncfg = {'version': 2, 'renderer': 'networkd', 'ethernets': {}}
        nsi = network_state.NetworkStateInterpreter(version=ncfg['version'],
                                                    config=ncfg)
        nsi.parse_config(skip_broken=False)
        self.assertEqual(ncfg, nsi.as_dict()['config'])


class TestNetworkStateParseNameservers:
    def _parse_network_state_from_config(self, config):
        yaml = safeyaml.load(config)
        return network_state.parse_net_config_data(yaml['network'])

    def test_v1_nameservers_valid(self):
        config = self._parse_network_state_from_config(
            V1_CONFIG_NAMESERVERS_VALID)

        # If an interface was specified, DNS shouldn't be in the global list
        assert ['192.168.1.0', '4.4.4.4'] == sorted(
            config.dns_nameservers)
        assert ['eggs.local'] == config.dns_searchdomains

        # If an interface was specified, DNS should be part of the interface
        for iface in config.iter_interfaces():
            if iface['name'] == 'eth1':
                assert iface['dns']['addresses'] == ['192.168.1.1', '8.8.8.8']
                assert iface['dns']['search'] == ['spam.local']
            else:
                assert 'dns' not in iface

    def test_v1_nameservers_invalid(self):
        with pytest.raises(ValueError):
            self._parse_network_state_from_config(
                V1_CONFIG_NAMESERVERS_INVALID)

    def test_v2_nameservers(self):
        config = self._parse_network_state_from_config(V2_CONFIG_NAMESERVERS)

        # Ensure DNS defined on interface exists on interface
        for iface in config.iter_interfaces():
            if iface['name'] == 'eth0':
                assert iface['dns'] == {
                    'nameservers': ['8.8.8.8'],
                    'search': ['spam.local', 'eggs.local'],
                }
            else:
                assert iface['dns'] == {
                    'nameservers': ['4.4.4.4'],
                    'search': ['foo.local', 'bar.local']
                }

        # Ensure DNS defined on interface also exists globally (since there
        # is no global DNS definitions in v2)
        assert ['4.4.4.4', '8.8.8.8'] == sorted(config.dns_nameservers)
        assert [
            'bar.local',
            'eggs.local',
            'foo.local',
            'spam.local',
        ] == sorted(config.dns_searchdomains)

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