# Copyright (c) 2017 Intel Corporation
#
# 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 time

import mock
import unittest

from yardstick.benchmark.runners.search import SearchRunner
from yardstick.benchmark.runners.search import SearchRunnerHelper
from yardstick.common import exceptions as y_exc


class TestSearchRunnerHelper(unittest.TestCase):

    def test___call__(self):
        scenario_cfg = {
            'runner': {},
        }

        benchmark = mock.Mock()
        method = getattr(benchmark(), 'my_method')
        helper = SearchRunnerHelper(
            benchmark, 'my_method', scenario_cfg, {}, mock.Mock())

        with helper.get_benchmark_instance():
            helper()

        method.assert_called_once()

    def test___call___error(self):
        scenario_cfg = {
            'runner': {},
        }

        helper = SearchRunnerHelper(
            mock.Mock(), 'my_method', scenario_cfg, {}, mock.Mock())

        with self.assertRaises(RuntimeError):
            helper()

    @mock.patch.object(time, 'sleep')
    @mock.patch.object(time, 'time')
    def test_is_not_done(self, mock_time, *args):
        scenario_cfg = {
            'runner': {},
        }

        mock_time.side_effect = range(1000)

        helper = SearchRunnerHelper(
            mock.Mock(), 'my_method', scenario_cfg, {}, mock.Mock())

        index = -1
        for index in helper.is_not_done():
            if index >= 10:
                break

        self.assertGreaterEqual(index, 10)

    @mock.patch.object(time, 'sleep')
    def test_is_not_done_immediate_stop(self, *args):
        scenario_cfg = {
            'runner': {
                'run_step': '',
            },
        }

        helper = SearchRunnerHelper(
            mock.Mock(), 'my_method', scenario_cfg, {}, mock.Mock())

        index = -1
        for index in helper.is_not_done():
            if index >= 10:
                break

        self.assertEqual(index, -1)


class TestSearchRunner(unittest.TestCase):

    def test__worker_run_once(self):
        def update(*args):
            args[-1].update(data)

        data = {
            'key1': {
                'inner1': 'value1',
                'done': 0,
            },
            'key2': {
                'done': None,
            },
        }

        runner = SearchRunner({})
        runner.worker_helper = mock.Mock(side_effect=update)

        self.assertFalse(runner._worker_run_once('sequence 1'))

    def test__worker_run_once_done(self):
        def update(*args):
            args[-1].update(data)

        data = {
            'key1': {
                'inner1': 'value1',
                'done': 0,
            },
            'key2': {
                'done': None,
            },
            'key3': {
                'done': True,
            },
            'key4': [],
            'key5': 'value5',
        }

        runner = SearchRunner({})
        runner.worker_helper = mock.Mock(side_effect=update)

        self.assertTrue(runner._worker_run_once('sequence 1'))

    def test__worker_run_once_assertion_error_assert(self):
        runner = SearchRunner({})
        runner.sla_action = 'assert'
        runner.worker_helper = mock.Mock(side_effect=y_exc.SLAValidationError)

        with self.assertRaises(y_exc.SLAValidationError):
            runner._worker_run_once('sequence 1')

    def test__worker_run_once_assertion_error_monitor(self):
        runner = SearchRunner({})
        runner.sla_action = 'monitor'
        runner.worker_helper = mock.Mock(side_effect=y_exc.SLAValidationError)

        self.assertFalse(runner._worker_run_once('sequence 1'))

    def test__worker_run_once_non_assertion_error_none(self):
        runner = SearchRunner({})
        runner.worker_helper = mock.Mock(side_effect=RuntimeError)

        self.assertTrue(runner._worker_run_once('sequence 1'))

    def test__worker_run_once_non_assertion_error(self):
        runner = SearchRunner({})
        runner.sla_action = 'monitor'
        runner.worker_helper = mock.Mock(side_effect=RuntimeError)

        self.assertFalse(runner._worker_run_once('sequence 1'))

    def test__worker_run(self):
        scenario_cfg = {
            'runner': {'interval': 0, 'timeout': 1},
        }

        runner = SearchRunner({})
        runner._worker_run_once = mock.Mock(side_effect=[0, 0, 1])

        runner._worker_run(mock.Mock(), 'my_method', scenario_cfg, {})

    def test__worker_run_immediate_stop(self):
        scenario_cfg = {
            'runner': {
                'run_step': '',
            },
        }

        runner = SearchRunner({})
        runner._worker_run(mock.Mock(), 'my_method', scenario_cfg, {})

    @mock.patch('yardstick.benchmark.runners.search.multiprocessing')
    def test__run_benchmark(self, mock_multi_process):
        scenario_cfg = {
            'runner': {},
        }

        runner = SearchRunner({})
        runner._run_benchmark(mock.Mock(), 'my_method', scenario_cfg, {})
        mock_multi_process.Process.assert_called_once()