# Copyright (c) 2013 Mirantis Inc.
#
# 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 mock
import six
import testtools

from sahara import exceptions as ex
from sahara.plugins.fake import plugin
from sahara.service import api
import sahara.service.validation as v
from sahara.service.validations import clusters_scaling as c_s
from sahara.service.validations import clusters_schema as c_schema
from sahara.tests.unit.service.validation import utils as u
from sahara.tests.unit import testutils as tu
from sahara.utils import cluster as c_u


def _get_plugin(plugin_name):
    if plugin_name == 'fake':
        return plugin.FakePluginProvider()
    return None


class TestScalingValidation(u.ValidationTestCase):
    def setUp(self):
        super(TestScalingValidation, self).setUp()
        api.plugin_base.setup_plugins()
        self._create_object_fun = mock.Mock()
        self.duplicates_detected = ("Duplicates in node group names are"
                                    " detected: ['a']")
        self.setup_context(tenant_id='tenant1')

    @mock.patch('sahara.service.api.get_cluster')
    @mock.patch('sahara.plugins.base.PluginManager.get_plugin')
    def _assert_check_scaling(self,
                              get_plugin_p=None,
                              get_cluster_p=None,
                              data=None, cluster=None,
                              expected_message=None,
                              expected_exception=ex.InvalidReferenceException):

        get_cluster_p.return_value = cluster
        get_plugin_p.side_effect = _get_plugin

        with testtools.ExpectedException(expected_exception):
            try:
                c_s.check_cluster_scaling(data, cluster.id)
            except expected_exception as e:
                message = six.text_type(e).split('\n')[0]
                self.assertEqual(expected_message, message)
                raise e

    @mock.patch("sahara.service.api.OPS")
    def test_check_cluster_scaling_resize_ng(self, ops):
        ops.get_engine_type_and_version.return_value = "direct.1.1"
        ng1 = tu.make_ng_dict('ng', '42', ['namenode'], 1)
        cluster = tu.create_cluster("cluster1", "tenant1", "fake", "0.1",
                                    [ng1],
                                    status=c_u.CLUSTER_STATUS_VALIDATING,
                                    id='12321')

        self._assert_check_scaling(
            data={}, cluster=cluster,
            expected_message="Cluster cannot be scaled "
                             "not in '" + c_u.CLUSTER_STATUS_ACTIVE +
            "' status. Cluster status: " +
            c_u.CLUSTER_STATUS_VALIDATING)

        cluster = tu.create_cluster("cluster1", "tenant1", "fake", "0.1",
                                    [ng1], status=c_u.CLUSTER_STATUS_ACTIVE,
                                    id='12321')
        data = {
            'resize_node_groups': [
                {
                    'name': 'a',
                    'flavor_id': '42',
                    'node_processes': ['namenode']
                }
            ],
        }
        self._assert_check_scaling(
            data=data, cluster=cluster,
            expected_message="Cluster doesn't contain "
                             "node group with name 'a'")
        data.update({'resize_node_groups': [
            {
                'name': 'a',
                'flavor_id': '42',
                'node_processes': ['namenode']
            },
            {
                'name': 'a',
                'flavor_id': '42',
                'node_processes': ['namenode']
            }
        ]})
        self._assert_check_scaling(
            data=data, cluster=cluster,
            expected_message=self.duplicates_detected,
            expected_exception=ex.InvalidDataException)

    @mock.patch("sahara.service.api.OPS")
    def test_check_cluster_scaling_add_ng(self, ops):
        ops.get_engine_type_and_version.return_value = "direct.1.1"
        ng1 = tu.make_ng_dict('ng', '42', ['namenode'], 1)
        cluster = tu.create_cluster("test-cluster", "tenant1", "fake",
                                    "0.1",
                                    [ng1], status=c_u.CLUSTER_STATUS_ACTIVE,
                                    id='12321')
        data = {
            'add_node_groups': [
                {
                    'name': 'a',
                    'flavor_id': '42',
                    'node_processes': ['namenode']
                },
                {
                    'name': 'a',
                    'flavor_id': '42',
                    'node_processes': ['namenode']
                }
            ]
        }
        self._assert_check_scaling(
            data=data, cluster=cluster,
            expected_message=self.duplicates_detected,
            expected_exception=ex.InvalidDataException)
        data = {
            'add_node_groups': [
                {
                    'name': 'ng',
                    'flavor_id': '42',
                    'node_processes': ['namenode']
                },
            ]
        }
        self._assert_check_scaling(
            data=data, cluster=cluster,
            expected_message="Can't add new nodegroup. "
                             "Cluster already has nodegroup "
                             "with name 'ng'")

        data = {
            'add_node_groups': [
                {
                    'name': 'very-very-very-very-very-very-long-ng-name',
                    'flavor_id': '42',
                    'node_processes': ['namenode'],
                    'count': 10
                },
            ]
        }
        patchers = u.start_patch()
        self._assert_check_scaling(
            data=data, cluster=cluster,
            expected_message="Composite hostname test-cluster-very-"
                             "very-very-very-very-very-long-ng-name-"
                             "010.novalocal in provisioned cluster exceeds "
                             "maximum limit 64 characters",
            expected_exception=ex.InvalidDataException)
        u.stop_patch(patchers)

    @mock.patch("sahara.utils.api.request_data")
    @mock.patch("sahara.utils.api.bad_request")
    def _assert_cluster_scaling_validation(self,
                                           bad_req=None,
                                           req_data=None,
                                           data=None,
                                           bad_req_i=None):
        m_func = mock.Mock()
        m_func.__name__ = "m_func"
        req_data.return_value = data
        v.validate(c_schema.CLUSTER_SCALING_SCHEMA,
                   self._create_object_fun)(m_func)(data=data,
                                                    cluster_id='42')

        self.assertEqual(1, req_data.call_count)
        self._assert_calls(bad_req, bad_req_i)

    @mock.patch("sahara.service.api.OPS")
    def test_cluster_scaling_scheme_v_resize_ng(self, ops):
        ops.get_engine_type_and_version.return_value = "direct.1.1"
        self._create_object_fun = mock.Mock()
        data = {
        }
        self._assert_cluster_scaling_validation(
            data=data,
            bad_req_i=(1, 'VALIDATION_ERROR',
                       u'{} is not valid under any of the given schemas')
        )
        data = {
            'resize_node_groups': [{}]
        }
        self._assert_cluster_scaling_validation(
            data=data,
            bad_req_i=(1, 'VALIDATION_ERROR',
                       u"resize_node_groups[0]: 'name' is a required property")
        )
        data = {
            'resize_node_groups': [
                {
                    'name': 'a'
                }
            ]
        }
        self._assert_cluster_scaling_validation(
            data=data,
            bad_req_i=(1, 'VALIDATION_ERROR',
                       u"resize_node_groups[0]: 'count' is a required "
                       u"property")
        )

    @mock.patch("sahara.service.api.OPS")
    def test_cluster_scaling_validation_add_ng(self, ops):
        ops.get_engine_type_and_version.return_value = "direct.1.1"
        data = {
            'add_node_groups': [
                {
                    "node_group_template_id": "5185a809-6bf7-"
                                              "44ed-9de3-618270550e2c",
                }
            ]
        }
        self._assert_cluster_scaling_validation(
            data=data,
            bad_req_i=(1, 'VALIDATION_ERROR',
                       "add_node_groups[0]: {'node_group_template_id': "
                       "'5185a809-6bf7-44ed-9de3-618270550e2c'} "
                       "is not valid under any of the given schemas")
        )
        data = {
            'add_node_groups': [
                {
                    "node_group_template_id": "5185a809-6bf7-"
                                              "44ed-9de3-618270550e2c",
                    'name': 'a'
                }
            ]
        }
        self._assert_cluster_scaling_validation(
            data=data,
            bad_req_i=(1, 'VALIDATION_ERROR',
                       u"add_node_groups[0]: {'node_group_template_id': "
                       u"'5185a809-6bf7-44ed-9de3-618270550e2c', "
                       u"'name': 'a'} is not valid under any "
                       u"of the given schemas")
        )

    @mock.patch("sahara.service.api.OPS")
    def test_cluster_scaling_validation_right_schema(self, ops):
        ops.get_engine_type_and_version.return_value = "direct.1.1"
        data = {
            'add_node_groups': [
                {
                    "node_group_template_id": "5185a809-6bf7-"
                                              "44ed-9de3-618270550e2c",
                    'name': 'a',
                    'count': 3
                }
            ]
        }
        self._assert_cluster_scaling_validation(
            data=data
        )
        data = {
            'resize_node_groups': [
                {
                    'name': 'a',
                    'count': 3
                }
            ]
        }
        self._assert_cluster_scaling_validation(
            data=data
        )
        data = {
            'resize_node_groups': [
                {
                    'name': 'a',
                    'count': 3
                }
            ],
            'add_node_groups': [
                {
                    "node_group_template_id": "5185a809-6bf7-"
                                              "44ed-9de3-618270550e2c",
                    'name': 'a',
                    'count': 3
                }
            ]
        }
        self._assert_cluster_scaling_validation(
            data=data
        )

    @mock.patch("sahara.service.api.OPS")
    def test_cluster_scaling_scheme_validation_types(self, ops):
        ops.get_engine_type_and_version.return_value = "direct.1.1"
        data = {
            'resize_node_groups': {},
        }
        self._assert_cluster_scaling_validation(
            data=data,
            bad_req_i=(1, 'VALIDATION_ERROR',
                       u"resize_node_groups: {} is not of type 'array'")
        )
        data = {
            'add_node_groups': {}
        }
        self._assert_cluster_scaling_validation(
            data=data,
            bad_req_i=(1, 'VALIDATION_ERROR',
                       u"add_node_groups: {} is not of type 'array'")
        )
        data = {
            'resize_node_groups': [],
        }
        self._assert_cluster_scaling_validation(
            data=data,
            bad_req_i=(1, 'VALIDATION_ERROR',
                       u'resize_node_groups: [] is too short')
        )

    @mock.patch("sahara.service.api.OPS")
    def test_cluster_scaling_v_right_data(self, ops):
        self.setup_context(tenant_id='t')
        ops.get_engine_type_and_version.return_value = "direct.1.1"
        self._create_object_fun = c_s.check_cluster_scaling

        data = {
            'resize_node_groups': [
                {
                    'name': 'ng',
                    'count': 4
                }
            ],
            'add_node_groups': [
                {
                    'name': 'a',
                    'flavor_id': '42',
                    'node_processes': ['namenode'],
                    'count': 3
                },
            ]
        }
        patchers = u.start_patch()
        self._assert_cluster_scaling_validation(data=data)
        u.stop_patch(patchers)

    @mock.patch("sahara.service.api.OPS")
    def test_check_cluster_scaling_wrong_engine(self, ops):
        ops.get_engine_type_and_version.return_value = "direct.1.1"
        ng1 = tu.make_ng_dict('ng', '42', ['namenode'], 1)
        cluster = tu.create_cluster(
            "cluster1", "tenant1", "fake", "0.1", [ng1],
            status=c_u.CLUSTER_STATUS_ACTIVE, id='12321',
            sahara_info={"infrastructure_engine": "heat.1.1"})

        self._assert_check_scaling(
            data={}, cluster=cluster,
            expected_message="Cluster created with heat.1.1 infrastructure "
                             "engine can't be scaled with direct.1.1 engine")

    @mock.patch("sahara.service.api.OPS")
    def test_check_heat_cluster_scaling_missing_engine(self, ops):
        ops.get_engine_type_and_version.return_value = "heat.1.1"
        ng1 = tu.make_ng_dict('ng', '42', ['namenode'], 1)
        cluster = tu.create_cluster("cluster1", "tenant1", "fake", "0.1",
                                    [ng1], status=c_u.CLUSTER_STATUS_ACTIVE,
                                    id='12321')

        self._assert_check_scaling(
            data={}, cluster=cluster,
            expected_message="Cluster created before Juno release can't be "
                             "scaled with heat.1.1 engine")
