# Copyright (c) 2014 OpenStack Foundation
#
# 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 context as ctx
from sahara.plugins import base as pb
from sahara.service.edp.oozie import engine as oe
from sahara.tests.unit import base
from sahara.tests.unit.service.edp import edp_test_utils as u
from sahara.utils import edp


class TestOozieEngine(base.SaharaTestCase):
    def setUp(self):
        super(TestOozieEngine, self).setUp()
        pb.setup_plugins()

    def test_get_job_status(self):
        oje = FakeOozieJobEngine(u.create_cluster())
        client_class = mock.MagicMock()
        client_class.add_job = mock.MagicMock(return_value=1)
        client_class.get_job_info = mock.MagicMock(
            return_value={'status': 'PENDING'})
        oje._get_client = mock.MagicMock(return_value=client_class)

        _, job_exec = u.create_job_exec(edp.JOB_TYPE_PIG)
        self.assertIsNone(oje.get_job_status(job_exec))

        job_exec.engine_job_id = 1
        self.assertEqual({'status': 'PENDING'}, oje.get_job_status(job_exec))

    def test_add_postfix(self):
        oje = FakeOozieJobEngine(u.create_cluster())

        self.override_config("job_workflow_postfix", 'caba')
        res = oje._add_postfix('aba')
        self.assertEqual("aba/caba/", res)

        self.override_config("job_workflow_postfix", '')
        res = oje._add_postfix('aba')
        self.assertEqual("aba/", res)

    def test_get_oozie_job_params(self):
        oje = FakeOozieJobEngine(u.create_cluster())
        oozie_params = {'oozie.libpath': '/mylibpath',
                        'oozie.wf.application.path': '/wrong'}
        scheduled_params = {'start': '2015-06-10T06:05Z',
                            'end': '2015-06-10T06:50Z',
                            'frequency': '10'}
        job_dir = '/job_dir'
        job_execution_type = 'workflow'
        job_params = oje._get_oozie_job_params('hadoop',
                                               '/tmp', oozie_params, True,
                                               scheduled_params, job_dir,
                                               job_execution_type)
        self.assertEqual('http://localhost:50030', job_params["jobTracker"])
        self.assertEqual('hdfs://localhost:8020', job_params["nameNode"])
        self.assertEqual('hadoop', job_params["user.name"])
        self.assertEqual('hdfs://localhost:8020/tmp',
                         job_params['oozie.wf.application.path'])
        self.assertEqual("/mylibpath,hdfs://localhost:8020/user/"
                         "sahara-hbase-lib", job_params['oozie.libpath'])

        # Make sure this doesn't raise an exception
        job_params = oje._get_oozie_job_params('hadoop',
                                               '/tmp', {}, True)
        self.assertEqual("hdfs://localhost:8020/user/"
                         "sahara-hbase-lib", job_params['oozie.libpath'])

        job_execution_type = 'scheduled'
        job_params = oje._get_oozie_job_params('hadoop',
                                               '/tmp', oozie_params, True,
                                               scheduled_params, job_dir,
                                               job_execution_type)
        for i in ["start", "end", "frequency"]:
            self.assertEqual(scheduled_params[i], job_params[i])

    @mock.patch('sahara.utils.remote.get_remote')
    @mock.patch('sahara.utils.ssh_remote.InstanceInteropHelper')
    @mock.patch('sahara.conductor.API.job_binary_internal_get_raw_data')
    def test_hdfs_upload_job_files(self, conductor_raw_data, remote_class,
                                   remote):
        remote_class.__exit__.return_value = 'closed'
        remote.return_value = remote_class
        conductor_raw_data.return_value = 'ok'

        oje = FakeOozieJobEngine(u.create_cluster())
        job, _ = u.create_job_exec(edp.JOB_TYPE_PIG)
        res = oje._upload_job_files_to_hdfs(mock.Mock(), 'job_prefix', job, {})
        self.assertEqual(['job_prefix/script.pig'], res)

        job, _ = u.create_job_exec(edp.JOB_TYPE_MAPREDUCE)
        res = oje._upload_job_files_to_hdfs(mock.Mock(), 'job_prefix', job, {})
        self.assertEqual(['job_prefix/lib/main.jar'], res)

    @mock.patch('sahara.utils.remote.get_remote')
    def test_upload_workflow_file(self, remote_get):
        oje = FakeOozieJobEngine(u.create_cluster())
        remote_class = mock.MagicMock()
        remote_class.__exit__.return_value = 'closed'
        remote_get.return_value = remote_class
        res = oje._upload_workflow_file(remote_get, "test", "hadoop.xml",
                                        'hdfs')
        self.assertEqual("test/workflow.xml", res)

    @mock.patch('sahara.utils.remote.get_remote')
    def test_upload_coordinator_file(self, remote_get):
        oje = FakeOozieJobEngine(u.create_cluster())
        remote_class = mock.MagicMock()
        remote_class.__exit__.return_value = 'closed'
        remote_get.return_value = remote_class
        res = oje._upload_coordinator_file(remote_get, "test", "hadoop.xml",
                                           'hdfs')
        self.assertEqual("test/coordinator.xml", res)

    @mock.patch('sahara.utils.remote.get_remote')
    def test_hdfs_create_workflow_dir(self, remote):
        remote_class = mock.MagicMock()
        remote_class.__exit__.return_value = 'closed'
        remote.return_value = remote_class

        oje = FakeOozieJobEngine(u.create_cluster())
        job, _ = u.create_job_exec(edp.JOB_TYPE_PIG)
        res = oje._create_hdfs_workflow_dir(mock.Mock(), job)
        self.assertIn('/user/hadoop/special_name/', res)

    def test__resolve_external_hdfs_urls(self):

        oje = FakeOozieJobEngine(u.create_cluster())
        job_configs = {
            "configs": {
                "mapred.map.tasks": "1",
                "hdfs1": "hdfs://localhost/hdfs1"},
            "args": ["hdfs://localhost/hdfs3", "10"],
            "params": {
                "param1": "10",
                "param2": "hdfs://localhost/hdfs2"
            }
        }

        expected_external_hdfs_urls = ['hdfs://localhost/hdfs1',
                                       'hdfs://localhost/hdfs2',
                                       'hdfs://localhost/hdfs3']

        external_hdfs_urls = oje._resolve_external_hdfs_urls(job_configs)

        self.assertEqual(expected_external_hdfs_urls, external_hdfs_urls)

    @mock.patch('sahara.service.edp.oozie.oozie.OozieClient.get_job_info')
    @mock.patch('sahara.service.edp.oozie.oozie.OozieClient.kill_job')
    def test_cancel_job(self, kill_get, info_get):
        info_get.return_value = {}
        oje = FakeOozieJobEngine(u.create_cluster())
        _, job_exec = u.create_job_exec(edp.JOB_TYPE_PIG)

        # test cancel job without engine_job_id
        job_exec.engine_job_id = None
        oje.cancel_job(job_exec)
        self.assertEqual(0, kill_get.call_count)

        # test cancel job with engine_job_id
        job_exec.engine_job_id = 123
        oje.cancel_job(job_exec)
        self.assertEqual(1, kill_get.call_count)

    @mock.patch('sahara.service.edp.oozie.workflow_creator.'
                'workflow_factory.get_workflow_xml')
    @mock.patch('sahara.utils.remote.get_remote')
    @mock.patch('sahara.conductor.API.job_execution_update')
    @mock.patch('sahara.conductor.API.data_source_get')
    @mock.patch('sahara.conductor.API.job_get')
    def test_prepare_run_job(self, job, data_source, update,
                             remote, wf_factory):
        wf_factory.return_value = mock.MagicMock()

        remote_class = mock.MagicMock()
        remote_class.__exit__.return_value = 'closed'
        remote.return_value = remote_class

        job_class = mock.MagicMock()
        job_class.name = "myJob"
        job.return_value = job_class

        source = mock.MagicMock()
        source.url = "localhost"

        data_source.return_value = source
        oje = FakeOozieJobEngine(u.create_cluster())
        _, job_exec = u.create_job_exec(edp.JOB_TYPE_PIG)
        update.return_value = job_exec

        res = oje._prepare_run_job(job_exec)
        self.assertEqual(ctx.ctx(), res['context'])
        self.assertEqual('hadoop', res['hdfs_user'])
        self.assertEqual(job_exec, res['job_execution'])
        self.assertEqual({}, res['oozie_params'])

    @mock.patch('sahara.service.edp.oozie.workflow_creator.'
                'workflow_factory.get_workflow_xml')
    @mock.patch('sahara.utils.remote.get_remote')
    @mock.patch('sahara.conductor.API.job_execution_update')
    @mock.patch('sahara.conductor.API.data_source_get')
    @mock.patch('sahara.conductor.API.job_get')
    @mock.patch('sahara.conductor.API.job_execution_get')
    def test_run_job(self, exec_get, job, data_source,
                     update, remote, wf_factory):
        wf_factory.return_value = mock.MagicMock()
        remote_class = mock.MagicMock()
        remote_class.__exit__.return_value = 'closed'
        remote.return_value = remote_class

        job_class = mock.MagicMock()
        job.return_value = job_class
        job.name = "myJob"

        source = mock.MagicMock()
        source.url = "localhost"
        data_source.return_value = source

        oje = FakeOozieJobEngine(u.create_cluster())
        client_class = mock.MagicMock()
        client_class.add_job = mock.MagicMock(return_value=1)
        client_class.get_job_info = mock.MagicMock(
            return_value={'status': 'PENDING'})
        oje._get_client = mock.MagicMock(return_value=client_class)

        _, job_exec = u.create_job_exec(edp.JOB_TYPE_PIG)
        update.return_value = job_exec

        self.assertEqual((1, 'PENDING', None), oje.run_job(job_exec))


class FakeOozieJobEngine(oe.OozieJobEngine):
    def get_hdfs_user(self):
        return 'hadoop'

    def create_hdfs_dir(self, remote, dir_name):
        return

    def get_oozie_server_uri(self, cluster):
        return 'http://localhost:11000/oozie'

    def get_oozie_server(self, cluster):
        return None

    def get_name_node_uri(self, cluster):
        return 'hdfs://localhost:8020'

    def get_resource_manager_uri(self, cluster):
        return 'http://localhost:50030'
