#
#    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 copy
import uuid

from heat.common import template_format
from heat.engine.clients.os import glance
from heat.engine.clients.os import neutron
from heat.engine.clients.os import nova
from heat.engine import environment
from heat.engine import parser
from heat.engine.resources import instance as instances
from heat.engine.resources import network_interface as network_interfaces
from heat.engine import scheduler
from heat.tests import common
from heat.tests import utils
from heat.tests.v1_1 import fakes


wp_template = '''
{
  "AWSTemplateFormatVersion" : "2010-09-09",
  "Description" : "WordPress",
  "Parameters" : {
    "KeyName" : {
      "Description" : "KeyName",
      "Type" : "String",
      "Default" : "test"
    },
    "InstanceType": {
      "Type": "String",
      "Description": "EC2 instance type",
      "Default": "m1.small",
      "AllowedValues": [ "m1.small", "m1.large" ]
    },
    "SubnetId": {
      "Type" : "String",
      "Description" : "SubnetId of an existing subnet in your VPC"
    },
  },
  "Resources" : {
    "WebServer": {
      "Type": "AWS::EC2::Instance",
      "Properties": {
        "ImageId"        : "F17-x86_64-gold",
        "InstanceType"   : { "Ref" : "InstanceType" },
        "SubnetId"       : { "Ref" : "SubnetId" },
        "KeyName"        : { "Ref" : "KeyName" },
        "UserData"       : "wordpress"
      }
    }
  }
}
'''


wp_template_with_nic = '''
{
  "AWSTemplateFormatVersion" : "2010-09-09",
  "Description" : "WordPress",
  "Parameters" : {
    "KeyName" : {
      "Description" : "KeyName",
      "Type" : "String",
      "Default" : "test"
    },
    "InstanceType": {
      "Type": "String",
      "Description": "EC2 instance type",
      "Default": "m1.small",
      "AllowedValues": [ "m1.small", "m1.large" ]
    },
    "SubnetId": {
      "Type" : "String",
      "Description" : "SubnetId of an existing subnet in your VPC"
    },
  },
  "Resources" : {

    "nic1": {
        "Type": "AWS::EC2::NetworkInterface",
        "Properties": {
            "SubnetId": { "Ref": "SubnetId" }
        }
    },

    "WebServer": {
      "Type": "AWS::EC2::Instance",
      "Properties": {
        "ImageId"        : "F17-x86_64-gold",
        "InstanceType"   : { "Ref" : "InstanceType" },
        "NetworkInterfaces": [ { "NetworkInterfaceId" : {"Ref": "nic1"},
                                 "DeviceIndex" : "0"  } ],
        "KeyName"        : { "Ref" : "KeyName" },
        "UserData"       : "wordpress"
      }
    }
  }
}
'''


class FakeNeutron(object):

    def show_subnet(self, subnet, **_params):
        return {
            'subnet': {
                'name': 'name',
                'network_id': 'fc68ea2c-b60b-4b4f-bd82-94ec81110766',
                'tenant_id': 'c1210485b2424d48804aad5d39c61b8f',
                'allocation_pools': [{'start': '10.10.0.2',
                                      'end': '10.10.0.254'}],
                'gateway_ip': '10.10.0.1',
                'ip_version': 4,
                'cidr': '10.10.0.0/24',
                'id': '4156c7a5-e8c4-4aff-a6e1-8f3c7bc83861',
                'enable_dhcp': False,
            }}

    def create_port(self, body=None):
        return {
            'port': {
                'admin_state_up': True,
                'device_id': '',
                'device_owner': '',
                'fixed_ips': [{
                    'ip_address': '10.0.3.3',
                    'subnet_id': '4156c7a5-e8c4-4aff-a6e1-8f3c7bc83861'}],
                'id': '64d913c1-bcb1-42d2-8f0a-9593dbcaf251',
                'mac_address': 'fa:16:3e:25:32:5d',
                'name': '',
                'network_id': 'fc68ea2c-b60b-4b4f-bd82-94ec81110766',
                'status': 'ACTIVE',
                'tenant_id': 'c1210485b2424d48804aad5d39c61b8f'
            }}

    def delete_port(self, port_id):
        return None


class instancesTest(common.HeatTestCase):
    def setUp(self):
        super(instancesTest, self).setUp()
        self.fc = fakes.FakeClient()

    def _mock_get_image_id_success(self, imageId_input, imageId):
        self.m.StubOutWithMock(glance.GlanceClientPlugin, 'get_image_id')
        glance.GlanceClientPlugin.get_image_id(
            imageId_input).MultipleTimes().AndReturn(imageId)

    def _test_instance_create_delete(self, vm_status='ACTIVE',
                                     vm_delete_status='NotFound'):
        return_server = self.fc.servers.list()[1]
        instance = self._create_test_instance(return_server, 'in_create')

        instance.resource_id = '1234'
        instance.status = vm_status
        # this makes sure the auto increment worked on instance creation
        self.assertTrue(instance.id > 0)

        expected_ip = return_server.networks['public'][0]
        self.assertEqual(expected_ip, instance.FnGetAtt('PublicIp'))
        self.assertEqual(expected_ip, instance.FnGetAtt('PrivateIp'))
        self.assertEqual(expected_ip, instance.FnGetAtt('PrivateDnsName'))
        self.assertEqual(expected_ip, instance.FnGetAtt('PublicDnsName'))

        d1 = {'server': self.fc.client.get_servers_detail()[1]['servers'][0]}
        d1['server']['status'] = vm_status

        self.m.StubOutWithMock(self.fc.client, 'get_servers_1234')
        get = self.fc.client.get_servers_1234
        get().AndReturn((200, d1))

        d2 = copy.deepcopy(d1)
        if vm_delete_status == 'DELETED':
            d2['server']['status'] = vm_delete_status
            get().AndReturn((200, d2))
        else:
            get().AndRaise(fakes.fake_exception())

        self.m.ReplayAll()

        scheduler.TaskRunner(instance.delete)()
        self.assertEqual((instance.DELETE, instance.COMPLETE), instance.state)
        self.m.VerifyAll()

    def _create_test_instance(self, return_server, name):
        stack_name = '%s_s' % name
        t = template_format.parse(wp_template)
        template = parser.Template(t)
        kwargs = {'KeyName': 'test',
                  'InstanceType': 'm1.large',
                  'SubnetId': '4156c7a5-e8c4-4aff-a6e1-8f3c7bc83861'}
        stack = parser.Stack(utils.dummy_context(), stack_name, template,
                             environment.Environment(kwargs),
                             stack_id=str(uuid.uuid4()))
        image_id = 'CentOS 5.2'
        t['Resources']['WebServer']['Properties']['ImageId'] = image_id
        resource_defns = stack.t.resource_definitions(stack)
        instance = instances.Instance('%s_name' % name,
                                      resource_defns['WebServer'], stack)
        metadata = instance.metadata_get()

        self.m.StubOutWithMock(nova.NovaClientPlugin, '_create')
        nova.NovaClientPlugin._create().AndReturn(self.fc)

        self._mock_get_image_id_success(image_id, 1)

        self.m.StubOutWithMock(instance, 'neutron')
        instance.neutron().MultipleTimes().AndReturn(FakeNeutron())

        self.m.StubOutWithMock(neutron.NeutronClientPlugin, '_create')
        neutron.NeutronClientPlugin._create().MultipleTimes().AndReturn(
            FakeNeutron())

        # need to resolve the template functions
        server_userdata = instance.client_plugin().build_userdata(
            metadata,
            instance.t['Properties']['UserData'],
            'ec2-user')
        self.m.StubOutWithMock(nova.NovaClientPlugin, 'build_userdata')
        nova.NovaClientPlugin.build_userdata(
            metadata,
            instance.t['Properties']['UserData'],
            'ec2-user').AndReturn(server_userdata)

        self.m.StubOutWithMock(self.fc.servers, 'create')
        self.fc.servers.create(
            image=1, flavor=3, key_name='test',
            name=utils.PhysName(stack_name, instance.name),
            security_groups=None,
            userdata=server_userdata, scheduler_hints=None, meta=None,
            nics=[{'port-id': '64d913c1-bcb1-42d2-8f0a-9593dbcaf251'}],
            availability_zone=None,
            block_device_mapping=None).AndReturn(
                return_server)
        self.m.ReplayAll()

        scheduler.TaskRunner(instance.create)()
        return instance

    def _create_test_instance_with_nic(self, return_server, name):
        stack_name = '%s_s' % name
        t = template_format.parse(wp_template_with_nic)
        template = parser.Template(t)
        kwargs = {'KeyName': 'test',
                  'InstanceType': 'm1.large',
                  'SubnetId': '4156c7a5-e8c4-4aff-a6e1-8f3c7bc83861'}
        stack = parser.Stack(utils.dummy_context(), stack_name, template,
                             environment.Environment(kwargs),
                             stack_id=str(uuid.uuid4()))
        image_id = 'CentOS 5.2'
        t['Resources']['WebServer']['Properties']['ImageId'] = image_id

        resource_defns = stack.t.resource_definitions(stack)
        nic = network_interfaces.NetworkInterface('%s_nic' % name,
                                                  resource_defns['nic1'],
                                                  stack)

        instance = instances.Instance('%s_name' % name,
                                      resource_defns['WebServer'], stack)
        metadata = instance.metadata_get()

        self._mock_get_image_id_success(image_id, 1)
        self.m.StubOutWithMock(nic, 'neutron')
        nic.neutron().MultipleTimes().AndReturn(FakeNeutron())

        self.m.StubOutWithMock(neutron.NeutronClientPlugin, '_create')
        neutron.NeutronClientPlugin._create().MultipleTimes().AndReturn(
            FakeNeutron())

        self.m.StubOutWithMock(nova.NovaClientPlugin, '_create')
        nova.NovaClientPlugin._create().AndReturn(self.fc)

        # need to resolve the template functions
        server_userdata = instance.client_plugin().build_userdata(
            metadata,
            instance.t['Properties']['UserData'],
            'ec2-user')
        self.m.StubOutWithMock(nova.NovaClientPlugin, 'build_userdata')
        nova.NovaClientPlugin.build_userdata(
            metadata,
            instance.t['Properties']['UserData'],
            'ec2-user').AndReturn(server_userdata)

        self.m.StubOutWithMock(self.fc.servers, 'create')
        self.fc.servers.create(
            image=1, flavor=3, key_name='test',
            name=utils.PhysName(stack_name, instance.name),
            security_groups=None,
            userdata=server_userdata, scheduler_hints=None, meta=None,
            nics=[{'port-id': '64d913c1-bcb1-42d2-8f0a-9593dbcaf251'}],
            availability_zone=None,
            block_device_mapping=None).AndReturn(
                return_server)
        self.m.ReplayAll()

        # create network interface
        scheduler.TaskRunner(nic.create)()
        stack.resources["nic1"] = nic

        scheduler.TaskRunner(instance.create)()
        return instance

    def test_instance_create_delete_with_SubnetId(self):
        self._test_instance_create_delete(vm_delete_status='DELETED')

    def test_instance_create_with_nic(self):
        return_server = self.fc.servers.list()[1]
        instance = self._create_test_instance_with_nic(
            return_server, 'in_create_wnic')

        # this makes sure the auto increment worked on instance creation
        self.assertTrue(instance.id > 0)

        expected_ip = return_server.networks['public'][0]
        self.assertEqual(expected_ip, instance.FnGetAtt('PublicIp'))
        self.assertEqual(expected_ip, instance.FnGetAtt('PrivateIp'))
        self.assertEqual(expected_ip, instance.FnGetAtt('PrivateDnsName'))
        self.assertEqual(expected_ip, instance.FnGetAtt('PublicDnsName'))

        self.m.VerifyAll()
