#
#    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.

import collections
import copy
from unittest import mock

from neutronclient.common import exceptions as neutron_exc
from neutronclient.v2_0 import client as neutronclient

from heat.common import template_format
from heat.engine import resource
from heat.engine import rsrc_defn
from heat.engine import scheduler
from heat.engine import stack as parser
from heat.engine import template
from heat.tests import common
from heat.tests import utils

NovaSG = collections.namedtuple('NovaSG',
                                ' '.join([
                                    'name',
                                    'id',
                                    'rules',
                                    'description',
                                ]))


class SecurityGroupTest(common.HeatTestCase):

    test_template_neutron = '''
HeatTemplateFormatVersion: '2012-12-12'
Resources:
  the_sg:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: HTTP and SSH access
      VpcId: aaaa
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: "22"
          ToPort: "22"
          CidrIp: 0.0.0.0/0
        - IpProtocol: tcp
          FromPort : "80"
          ToPort : "80"
          CidrIp : 0.0.0.0/0
        - IpProtocol: tcp
          SourceSecurityGroupId: wwww
      SecurityGroupEgress:
        - IpProtocol: tcp
          FromPort: "22"
          ToPort: "22"
          CidrIp: 10.0.1.0/24
        - SourceSecurityGroupName: xxxx
'''

    def setUp(self):
        super(SecurityGroupTest, self).setUp()
        self.m_csg = self.patchobject(neutronclient.Client,
                                      'create_security_group')
        self.m_csgr = self.patchobject(
            neutronclient.Client, 'create_security_group_rule')
        self.m_ssg = self.patchobject(neutronclient.Client,
                                      'show_security_group')
        self.m_dsgr = self.patchobject(
            neutronclient.Client, 'delete_security_group_rule')
        self.m_dsg = self.patchobject(
            neutronclient.Client, 'delete_security_group')
        self.m_usg = self.patchobject(
            neutronclient.Client, 'update_security_group')
        self.patchobject(resource.Resource, 'is_using_neutron',
                         return_value=True)
        self.sg_name = utils.PhysName('test_stack', 'the_sg')

    def mock_no_neutron(self):
        self.patchobject(resource.Resource, 'is_using_neutron',
                         return_value=False)

    def create_stack(self, templ):
        self.stack = self.parse_stack(template_format.parse(templ))
        self.assertIsNone(self.stack.create())
        return self.stack

    def parse_stack(self, t):
        stack_name = 'test_stack'
        tmpl = template.Template(t)
        stack = parser.Stack(utils.dummy_context(), stack_name, tmpl)
        stack.store()
        return stack

    def assertResourceState(self, rsrc, ref_id, metadata=None):
        metadata = metadata or {}
        self.assertIsNone(rsrc.validate())
        self.assertEqual((rsrc.CREATE, rsrc.COMPLETE), rsrc.state)
        self.assertEqual(ref_id, rsrc.FnGetRefId())
        self.assertEqual(metadata, dict(rsrc.metadata_get()))

    def validate_create_security_group_rule_calls(self):
        expected = [
            mock.call(
                {'security_group_rule': {
                    'security_group_id': 'aaaa', 'protocol': 'tcp',
                    'port_range_max': 22, 'direction': 'ingress',
                    'remote_group_id': None, 'ethertype': 'IPv4',
                    'remote_ip_prefix': '0.0.0.0/0', 'port_range_min': 22}}
            ),
            mock.call(
                {'security_group_rule': {
                    'security_group_id': 'aaaa', 'protocol': 'tcp',
                    'port_range_max': 80, 'direction': 'ingress',
                    'remote_group_id': None, 'ethertype': 'IPv4',
                    'remote_ip_prefix': '0.0.0.0/0', 'port_range_min': 80}}
            ),
            mock.call(
                {'security_group_rule': {
                    'security_group_id': 'aaaa', 'protocol': 'tcp',
                    'port_range_max': None, 'direction': 'ingress',
                    'remote_group_id': 'wwww', 'ethertype': 'IPv4',
                    'remote_ip_prefix': None, 'port_range_min': None}}
            ),
            mock.call(
                {'security_group_rule': {
                    'security_group_id': 'aaaa', 'protocol': 'tcp',
                    'port_range_max': 22, 'direction': 'egress',
                    'remote_group_id': None, 'ethertype': 'IPv4',
                    'remote_ip_prefix': '10.0.1.0/24', 'port_range_min': 22}}
            ),
            mock.call(
                {'security_group_rule': {
                    'security_group_id': 'aaaa', 'protocol': None,
                    'port_range_max': None, 'direction': 'egress',
                    'remote_group_id': 'xxxx', 'ethertype': 'IPv4',
                    'remote_ip_prefix': None, 'port_range_min': None}})
        ]

        self.assertEqual(expected, self.m_csgr.call_args_list)

    def validate_delete_security_group_rule(self):
        self.assertEqual(
            [mock.call('aaaa-1'),
             mock.call('aaaa-2'),
             mock.call('bbbb'),
             mock.call('cccc'),
             mock.call('dddd'),
             mock.call('eeee'),
             mock.call('ffff'),
             ],
            self.m_dsgr.call_args_list)

    def validate_stubout_neutron_create_security_group(self):
        self.m_csg.assert_called_once_with({
            'security_group': {
                'name': self.sg_name,
                'description': 'HTTP and SSH access'
            }
        })
        self.validate_delete_security_group_rule()
        self.validate_create_security_group_rule_calls()

    def stubout_neutron_create_security_group(self, mock_csgr=True):
        self.m_csg.return_value = {
            'security_group': {
                'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                'name': self.sg_name,
                'description': 'HTTP and SSH access',
                'security_group_rules': [{
                    "direction": "egress",
                    "ethertype": "IPv4",
                    "id": "aaaa-1",
                    "port_range_max": None,
                    "port_range_min": None,
                    "protocol": None,
                    "remote_group_id": None,
                    "remote_ip_prefix": None,
                    "security_group_id": "aaaa",
                    "tenant_id": "f18ca530cc05425e8bac0a5ff92f7e88"
                }, {
                    "direction": "egress",
                    "ethertype": "IPv6",
                    "id": "aaaa-2",
                    "port_range_max": None,
                    "port_range_min": None,
                    "protocol": None,
                    "remote_group_id": None,
                    "remote_ip_prefix": None,
                    "security_group_id": "aaaa",
                    "tenant_id": "f18ca530cc05425e8bac0a5ff92f7e88"
                }],
                'id': 'aaaa'
            }
        }
        if mock_csgr:
            self.m_csgr.side_effect = [
                {
                    'security_group_rule': {
                        'direction': 'ingress',
                        'remote_group_id': None,
                        'remote_ip_prefix': '0.0.0.0/0',
                        'port_range_min': 22,
                        'ethertype': 'IPv4',
                        'port_range_max': 22,
                        'protocol': 'tcp',
                        'security_group_id': 'aaaa',
                        'id': 'bbbb'
                    }},
                {
                    'security_group_rule': {
                        'direction': 'ingress',
                        'remote_group_id': None,
                        'remote_ip_prefix': '0.0.0.0/0',
                        'port_range_min': 80,
                        'ethertype': 'IPv4',
                        'port_range_max': 80,
                        'protocol': 'tcp',
                        'security_group_id': 'aaaa',
                        'id': 'cccc'
                    }
                },
                {
                    'security_group_rule': {
                        'direction': 'ingress',
                        'remote_group_id': 'wwww',
                        'remote_ip_prefix': None,
                        'port_range_min': None,
                        'ethertype': 'IPv4',
                        'port_range_max': None,
                        'protocol': 'tcp',
                        'security_group_id': 'aaaa',
                        'id': 'dddd'
                    }
                },
                {
                    'security_group_rule': {
                        'direction': 'egress',
                        'remote_group_id': None,
                        'remote_ip_prefix': '10.0.1.0/24',
                        'port_range_min': 22,
                        'ethertype': 'IPv4',
                        'port_range_max': 22,
                        'protocol': 'tcp',
                        'security_group_id': 'aaaa',
                        'id': 'eeee'
                    }
                },
                {
                    'security_group_rule': {
                        'direction': 'egress',
                        'remote_group_id': 'xxxx',
                        'remote_ip_prefix': None,
                        'port_range_min': None,
                        'ethertype': 'IPv4',
                        'port_range_max': None,
                        'protocol': None,
                        'security_group_id': 'aaaa',
                        'id': 'ffff'
                    }
                }
            ]

    def stubout_neutron_get_security_group(self):
        self.m_ssg.return_value = {
            'security_group': {
                'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                'name': 'sc1',
                'description': '',
                'security_group_rules': [{
                    'direction': 'ingress',
                    'protocol': 'tcp',
                    'port_range_max': 22,
                    'id': 'bbbb',
                    'ethertype': 'IPv4',
                    'security_group_id': 'aaaa',
                    'remote_group_id': None,
                    'remote_ip_prefix': '0.0.0.0/0',
                    'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                    'port_range_min': 22
                }, {
                    'direction': 'ingress',
                    'protocol': 'tcp',
                    'port_range_max': 80,
                    'id': 'cccc',
                    'ethertype': 'IPv4',
                    'security_group_id': 'aaaa',
                    'remote_group_id': None,
                    'remote_ip_prefix': '0.0.0.0/0',
                    'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                    'port_range_min': 80
                }, {
                    'direction': 'ingress',
                    'protocol': 'tcp',
                    'port_range_max': None,
                    'id': 'dddd',
                    'ethertype': 'IPv4',
                    'security_group_id': 'aaaa',
                    'remote_group_id': 'wwww',
                    'remote_ip_prefix': None,
                    'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                    'port_range_min': None
                }, {
                    'direction': 'egress',
                    'protocol': 'tcp',
                    'port_range_max': 22,
                    'id': 'eeee',
                    'ethertype': 'IPv4',
                    'security_group_id': 'aaaa',
                    'remote_group_id': None,
                    'remote_ip_prefix': '10.0.1.0/24',
                    'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                    'port_range_min': 22
                }, {
                    'direction': 'egress',
                    'protocol': None,
                    'port_range_max': None,
                    'id': 'ffff',
                    'ethertype': 'IPv4',
                    'security_group_id': 'aaaa',
                    'remote_group_id': 'xxxx',
                    'remote_ip_prefix': None,
                    'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                    'port_range_min': None
                }],
                'id': 'aaaa'}}

    def test_security_group_neutron(self):
        # create script
        self.stubout_neutron_create_security_group()

        self.stubout_neutron_get_security_group()

        stack = self.create_stack(self.test_template_neutron)

        sg = stack['the_sg']

        self.assertResourceState(sg, 'aaaa')

        stack.delete()
        self.validate_stubout_neutron_create_security_group()
        self.m_ssg.assert_called_once_with('aaaa')
        self.m_dsg.assert_called_once_with('aaaa')

    def test_security_group_neutron_exception(self):
        # create script
        self.m_csg.return_value = {
            'security_group': {
                'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                'name': self.sg_name,
                'description': 'HTTP and SSH access',
                'security_group_rules': [],
                'id': 'aaaa'
            }
        }
        self.m_csgr.side_effect = neutron_exc.Conflict

        # delete script
        self.m_dsgr.side_effect = neutron_exc.NeutronClientException(
            status_code=404)
        self.m_ssg.side_effect = [
            {'security_group': {
                'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                'name': 'sc1',
                'description': '',
                'security_group_rules': [{
                    'direction': 'ingress',
                    'protocol': 'tcp',
                    'port_range_max': 22,
                    'id': 'bbbb',
                    'ethertype': 'IPv4',
                    'security_group_id': 'aaaa',
                    'remote_group_id': None,
                    'remote_ip_prefix': '0.0.0.0/0',
                    'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                    'port_range_min': 22
                }, {
                    'direction': 'ingress',
                    'protocol': 'tcp',
                    'port_range_max': 80,
                    'id': 'cccc',
                    'ethertype': 'IPv4',
                    'security_group_id': 'aaaa',
                    'remote_group_id': None,
                    'remote_ip_prefix': '0.0.0.0/0',
                    'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                    'port_range_min': 80
                }, {
                    'direction': 'ingress',
                    'protocol': 'tcp',
                    'port_range_max': None,
                    'id': 'dddd',
                    'ethertype': 'IPv4',
                    'security_group_id': 'aaaa',
                    'remote_group_id': 'wwww',
                    'remote_ip_prefix': None,
                    'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                    'port_range_min': None
                }, {
                    'direction': 'egress',
                    'protocol': 'tcp',
                    'port_range_max': 22,
                    'id': 'eeee',
                    'ethertype': 'IPv4',
                    'security_group_id': 'aaaa',
                    'remote_group_id': None,
                    'remote_ip_prefix': '10.0.1.0/24',
                    'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                    'port_range_min': 22
                }, {
                    'direction': 'egress',
                    'protocol': None,
                    'port_range_max': None,
                    'id': 'ffff',
                    'ethertype': 'IPv4',
                    'security_group_id': 'aaaa',
                    'remote_group_id': None,
                    'remote_ip_prefix': None,
                    'tenant_id': 'f18ca530cc05425e8bac0a5ff92f7e88',
                    'port_range_min': None
                }],
                'id': 'aaaa'}},
            neutron_exc.NeutronClientException(status_code=404)]

        stack = self.create_stack(self.test_template_neutron)

        sg = stack['the_sg']

        self.assertResourceState(sg, 'aaaa')

        scheduler.TaskRunner(sg.delete)()

        sg.state_set(sg.CREATE, sg.COMPLETE, 'to delete again')
        sg.resource_id = 'aaaa'
        stack.delete()

        self.m_csg.assert_called_once_with({
            'security_group': {
                'name': self.sg_name,
                'description': 'HTTP and SSH access'
            }
        })
        self.validate_create_security_group_rule_calls()
        self.assertEqual(
            [mock.call('aaaa'), mock.call('aaaa')],
            self.m_ssg.call_args_list)
        self.assertEqual(
            [mock.call('bbbb'), mock.call('cccc'), mock.call('dddd'),
             mock.call('eeee'), mock.call('ffff')], self.m_dsgr.call_args_list)

    def test_security_group_neutron_update(self):
        # create script
        self.stubout_neutron_create_security_group(mock_csgr=False)

        # update script
        # delete old not needed rules
        self.stubout_neutron_get_security_group()

        stack = self.create_stack(self.test_template_neutron)
        sg = stack['the_sg']
        self.assertResourceState(sg, 'aaaa')

        # make updated template
        props = copy.deepcopy(sg.properties.data)
        props['SecurityGroupIngress'] = [
            {'IpProtocol': 'tcp',
             'FromPort': '80',
             'ToPort': '80',
             'CidrIp': '0.0.0.0/0'},
            {'IpProtocol': 'tcp',
             'FromPort': '443',
             'ToPort': '443',
             'CidrIp': '0.0.0.0/0'},
            {'IpProtocol': 'tcp',
             'SourceSecurityGroupId': 'zzzz'},
        ]
        props['SecurityGroupEgress'] = [
            {'IpProtocol': 'tcp',
             'FromPort': '22',
             'ToPort': '22',
             'CidrIp': '0.0.0.0/0'},
            {'SourceSecurityGroupName': 'xxxx'},
        ]
        after = rsrc_defn.ResourceDefinition(sg.name, sg.type(), props)

        # create missing rules
        self.m_csgr.side_effect = [
            {
                'security_group_rule': {
                    'direction': 'ingress',
                    'remote_group_id': None,
                    'remote_ip_prefix': '0.0.0.0/0',
                    'port_range_min': 443,
                    'ethertype': 'IPv4',
                    'port_range_max': 443,
                    'protocol': 'tcp',
                    'security_group_id': 'aaaa',
                    'id': 'bbbb'}
            }, {
                'security_group_rule': {
                    'direction': 'ingress',
                    'remote_group_id': 'zzzz',
                    'remote_ip_prefix': None,
                    'port_range_min': None,
                    'ethertype': 'IPv4',
                    'port_range_max': None,
                    'protocol': 'tcp',
                    'security_group_id': 'aaaa',
                    'id': 'dddd'}
            }, {
                'security_group_rule': {
                    'direction': 'egress',
                    'remote_group_id': None,
                    'remote_ip_prefix': '0.0.0.0/0',
                    'port_range_min': 22,
                    'ethertype': 'IPv4',
                    'port_range_max': 22,
                    'protocol': 'tcp',
                    'security_group_id': 'aaaa',
                    'id': 'eeee'
                }
            }
        ]

        scheduler.TaskRunner(sg.update, after)()

        self.assertEqual((sg.UPDATE, sg.COMPLETE), sg.state)
        self.m_dsgr.assert_has_calls(
            [mock.call('aaaa-1'), mock.call('aaaa-2'), mock.call('eeee'),
             mock.call('dddd'), mock.call('bbbb')],
            any_order=True)
        self.m_ssg.assert_called_once_with('aaaa')

    def test_security_group_neutron_update_with_empty_rules(self):
        # create script
        self.stubout_neutron_create_security_group()

        # update script
        # delete old not needed rules
        self.stubout_neutron_get_security_group()

        stack = self.create_stack(self.test_template_neutron)
        sg = stack['the_sg']
        self.assertResourceState(sg, 'aaaa')

        # make updated template
        props = copy.deepcopy(sg.properties.data)
        del props['SecurityGroupEgress']
        after = rsrc_defn.ResourceDefinition(sg.name, sg.type(), props)
        scheduler.TaskRunner(sg.update, after)()

        self.assertEqual((sg.UPDATE, sg.COMPLETE), sg.state)
        self.m_ssg.assert_called_once_with('aaaa')
        self.m_dsgr.assert_has_calls(
            [mock.call('aaaa-1'), mock.call('aaaa-2'), mock.call('eeee'),
             mock.call('ffff')],
            any_order=True)
