# Copyright (c) 2015 Intel 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

from sahara import conductor
from sahara import context
from sahara.tests.unit import base
from sahara.tests.unit.conductor import test_api
from sahara.utils import cluster as cluster_utils


class UtilsClusterTest(base.SaharaWithDbTestCase):
    def setUp(self):
        super(UtilsClusterTest, self).setUp()
        self.api = conductor.API

    def _make_sample(self):
        ctx = context.ctx()
        cluster = self.api.cluster_create(ctx, test_api.SAMPLE_CLUSTER)
        return cluster

    def test_change_cluster_status(self):
        cluster = self._make_sample()
        cluster = cluster_utils.change_cluster_status(
            cluster, cluster_utils.CLUSTER_STATUS_DELETING, "desc")
        self.assertEqual(cluster_utils.CLUSTER_STATUS_DELETING, cluster.status)
        self.assertEqual("desc", cluster.status_description)
        cluster_utils.change_cluster_status(
            cluster, cluster_utils.CLUSTER_STATUS_SPAWNING)
        self.assertEqual(cluster_utils.CLUSTER_STATUS_DELETING, cluster.status)

    def test_change_status_description(self):
        ctx = context.ctx()
        cluster = self._make_sample()
        cluster_id = cluster.id
        cluster = cluster_utils.change_cluster_status_description(
            cluster, "desc")
        self.assertEqual('desc', cluster.status_description)
        self.api.cluster_destroy(ctx, cluster)
        cluster = cluster_utils.change_cluster_status_description(
            cluster_id, "desc")
        self.assertIsNone(cluster)

    def test_get_instances(self):
        cluster = self._make_sample()
        ctx = context.ctx()
        idx = 0
        ids = []
        for ng in cluster.node_groups:
            for i in range(ng.count):
                idx += 1
                ids.append(self.api.instance_add(ctx, ng, {
                    'instance_id': str(idx),
                    'instance_name': str(idx),
                }))
        cluster = self.api.cluster_get(ctx, cluster)
        instances = cluster_utils.get_instances(cluster, ids)
        ids = set()
        for inst in instances:
            ids.add(inst.instance_id)
        self.assertEqual(idx, len(ids))
        for i in range(1, idx):
            self.assertIn(str(i), ids)

        instances = cluster_utils.get_instances(cluster)
        ids = set()
        for inst in instances:
            ids.add(inst.instance_id)
        self.assertEqual(idx, len(ids))
        for i in range(1, idx):
            self.assertIn(str(i), ids)

    def test_clean_cluster_from_empty_ng(self):
        ctx = context.ctx()
        cluster = self._make_sample()
        ng = cluster.node_groups[0]
        ng_len = len(cluster.node_groups)
        self.api.node_group_update(ctx, ng, {'count': 0})
        cluster = self.api.cluster_get(ctx, cluster.id)
        cluster_utils.clean_cluster_from_empty_ng(cluster)
        cluster = self.api.cluster_get(ctx, cluster.id)
        self.assertEqual(ng_len - 1, len(cluster.node_groups))

    def test_generate_etc_hosts(self):
        cluster = self._make_sample()
        ctx = context.ctx()
        idx = 0
        for ng in cluster.node_groups:
            for i in range(ng.count):
                idx += 1
                self.api.instance_add(ctx, ng, {
                    'instance_id': str(idx),
                    'instance_name': str(idx),
                    'internal_ip': str(idx),
                })
        cluster = self.api.cluster_get(ctx, cluster)
        with mock.patch("sahara.utils.openstack.base.url_for") as mock_url:
            mock_url.side_effect = ["http://keystone.local:1234/v13",
                                    "http://swift.local:5678/v42"]
            with mock.patch("socket.gethostbyname") as mock_get_host:
                mock_get_host.side_effect = ["1.2.3.4", "5.6.7.8"]
                value = cluster_utils.generate_etc_hosts(cluster)
        expected = ("127.0.0.1 localhost\n"
                    "1 1.novalocal 1\n"
                    "2 2.novalocal 2\n"
                    "3 3.novalocal 3\n"
                    "4 4.novalocal 4\n"
                    "1.2.3.4 keystone.local\n"
                    "5.6.7.8 swift.local\n")
        self.assertEqual(expected, value)