#!/usr/bin/python

# Copyright 2015 Google Inc. All Rights Reserved.

import mock
import unittest
import StringIO

import benchmark_run
import machine_manager
import schedv2
import test_flag
from benchmark_run import MockBenchmarkRun
from experiment_factory import ExperimentFactory
from experiment_file import ExperimentFile
from experiment_runner import ExperimentRunner
from machine_manager import MockCrosMachine
from cros_utils import command_executer
from cros_utils.command_executer import CommandExecuter
from experiment_runner_unittest import FakeLogger
from schedv2 import Schedv2


EXPERIMENT_FILE_1 = """\
board: daisy
remote: chromeos-daisy1.cros chromeos-daisy2.cros

benchmark: kraken {
  suite: telemetry_Crosperf
  iterations: 3
}

image1 {
  chromeos_image: /chromeos/src/build/images/daisy/latest/cros_image1.bin
  remote: chromeos-daisy3.cros
}

image2 {
  chromeos_image: /chromeos/src/build/imaages/daisy/latest/cros_image2.bin
  remote: chromeos-daisy4.cros chromeos-daisy5.cros
}
"""


EXPERIMENT_FILE_WITH_FORMAT = """\
board: daisy
remote: chromeos-daisy1.cros chromeos-daisy2.cros

benchmark: kraken {{
  suite: telemetry_Crosperf
  iterations: {kraken_iterations}
}}

image1 {{
  chromeos_image: /chromeos/src/build/images/daisy/latest/cros_image1.bin
  remote: chromeos-daisy3.cros
}}

image2 {{
  chromeos_image: /chromeos/src/build/imaages/daisy/latest/cros_image2.bin
  remote: chromeos-daisy4.cros chromeos-daisy5.cros
}}
"""


class Schedv2Test(unittest.TestCase):

    mock_logger = FakeLogger()
    mock_cmd_exec = mock.Mock(spec=CommandExecuter)

    @mock.patch('benchmark_run.BenchmarkRun',
                new=benchmark_run.MockBenchmarkRun)
    def _make_fake_experiment(self, expstr):
        """Create fake experiment from string.

        Note - we mock out BenchmarkRun in this step.
        """
        experiment_file = ExperimentFile(StringIO.StringIO(expstr))
        experiment = ExperimentFactory().GetExperiment(
            experiment_file, working_directory="", log_dir="")
        return experiment

    def test_remote(self):
        """Test that remotes in labels are aggregated into experiment.remote."""

        self.exp = self._make_fake_experiment(EXPERIMENT_FILE_1)
        self.exp.log_level = 'verbose'
        schedv2 = Schedv2(self.exp)
        self.assertIn('chromeos-daisy1.cros', self.exp.remote)
        self.assertIn('chromeos-daisy2.cros', self.exp.remote)
        self.assertIn('chromeos-daisy3.cros', self.exp.remote)
        self.assertIn('chromeos-daisy4.cros', self.exp.remote)
        self.assertIn('chromeos-daisy5.cros', self.exp.remote)

    def test_unreachable_remote(self):
        """Test unreachable remotes are removed from experiment remote and
        label.remote."""

        def MockIsReachable(cm):
            return (cm.name != 'chromeos-daisy3.cros' and
                    cm.name != 'chromeos-daisy5.cros')

        with mock.patch('machine_manager.MockCrosMachine.IsReachable',
                        new=MockIsReachable) as f:
            self.exp = self._make_fake_experiment(EXPERIMENT_FILE_1)
            self.assertIn('chromeos-daisy1.cros', self.exp.remote)
            self.assertIn('chromeos-daisy2.cros', self.exp.remote)
            self.assertNotIn('chromeos-daisy3.cros', self.exp.remote)
            self.assertIn('chromeos-daisy4.cros', self.exp.remote)
            self.assertNotIn('chromeos-daisy5.cros', self.exp.remote)

            for l in self.exp.labels:
                if l.name == 'image2':
                    self.assertNotIn('chromeos-daisy5.cros', l.remote)
                    self.assertIn('chromeos-daisy4.cros', l.remote)
                elif l.name == 'image1':
                    self.assertNotIn('chromeos-daisy3.cros', l.remote)

    @mock.patch('schedv2.BenchmarkRunCacheReader')
    def test_BenchmarkRunCacheReader_1(self, reader):
        """Test benchmarkrun set is split into 5 segments."""

        self.exp = self._make_fake_experiment(
            EXPERIMENT_FILE_WITH_FORMAT.format(kraken_iterations=9))
        schedv2 = Schedv2(self.exp)
        # We have 9 * 2 == 18 brs, we use 5 threads, each reading 4, 4, 4,
        # 4, 2 brs respectively.
        # Assert that BenchmarkRunCacheReader() is called 5 times.
        self.assertEquals(reader.call_count, 5)
        # reader.call_args_list[n] - nth call.
        # reader.call_args_list[n][0] - positioned args in nth call.
        # reader.call_args_list[n][0][1] - the 2nd arg in nth call,
        # that is 'br_list' in 'schedv2.BenchmarkRunCacheReader'.
        self.assertEquals(len(reader.call_args_list[0][0][1]), 4)
        self.assertEquals(len(reader.call_args_list[1][0][1]), 4)
        self.assertEquals(len(reader.call_args_list[2][0][1]), 4)
        self.assertEquals(len(reader.call_args_list[3][0][1]), 4)
        self.assertEquals(len(reader.call_args_list[4][0][1]), 2)

    @mock.patch('schedv2.BenchmarkRunCacheReader')
    def test_BenchmarkRunCacheReader_2(self, reader):
        """Test benchmarkrun set is split into 4 segments."""

        self.exp = self._make_fake_experiment(
            EXPERIMENT_FILE_WITH_FORMAT.format(kraken_iterations=8))
        schedv2 = Schedv2(self.exp)
        # We have 8 * 2 == 16 brs, we use 4 threads, each reading 4 brs.
        self.assertEquals(reader.call_count, 4)
        self.assertEquals(len(reader.call_args_list[0][0][1]), 4)
        self.assertEquals(len(reader.call_args_list[1][0][1]), 4)
        self.assertEquals(len(reader.call_args_list[2][0][1]), 4)
        self.assertEquals(len(reader.call_args_list[3][0][1]), 4)

    @mock.patch('schedv2.BenchmarkRunCacheReader')
    def test_BenchmarkRunCacheReader_3(self, reader):
        """Test benchmarkrun set is split into 2 segments."""

        self.exp = self._make_fake_experiment(
            EXPERIMENT_FILE_WITH_FORMAT.format(kraken_iterations=3))
        schedv2 = Schedv2(self.exp)
        # We have 3 * 2 == 6 brs, we use 2 threads.
        self.assertEquals(reader.call_count, 2)
        self.assertEquals(len(reader.call_args_list[0][0][1]), 3)
        self.assertEquals(len(reader.call_args_list[1][0][1]), 3)

    @mock.patch('schedv2.BenchmarkRunCacheReader')
    def test_BenchmarkRunCacheReader_4(self, reader):
        """Test benchmarkrun set is not splitted."""

        self.exp = self._make_fake_experiment(
            EXPERIMENT_FILE_WITH_FORMAT.format(kraken_iterations=1))
        schedv2 = Schedv2(self.exp)
        # We have 1 * 2 == 2 br, so only 1 instance.
        self.assertEquals(reader.call_count, 1)
        self.assertEquals(len(reader.call_args_list[0][0][1]), 2)

    def test_cachehit(self):
        """Test cache-hit and none-cache-hit brs are properly organized."""

        def MockReadCache(br):
            br.cache_hit = (br.label.name == 'image2')

        with mock.patch('benchmark_run.MockBenchmarkRun.ReadCache',
                        new=MockReadCache) as f:
            # We have 2 * 30 brs, half of which are put into _cached_br_list.
            self.exp = self._make_fake_experiment(
                EXPERIMENT_FILE_WITH_FORMAT.format(kraken_iterations=30))
            schedv2 = Schedv2(self.exp)
            self.assertEquals(len(schedv2._cached_br_list), 30)
            # The non-cache-hit brs are put into Schedv2._label_brl_map.
            self.assertEquals(reduce(lambda a, x: a + len(x[1]),
                                     schedv2._label_brl_map.iteritems(), 0),
                              30)

    def test_nocachehit(self):
        """Test no cache-hit."""

        def MockReadCache(br):
            br.cache_hit = False

        with mock.patch('benchmark_run.MockBenchmarkRun.ReadCache',
                        new=MockReadCache) as f:
            # We have 2 * 30 brs, none of which are put into _cached_br_list.
            self.exp = self._make_fake_experiment(
                EXPERIMENT_FILE_WITH_FORMAT.format(kraken_iterations=30))
            schedv2 = Schedv2(self.exp)
            self.assertEquals(len(schedv2._cached_br_list), 0)
            # The non-cache-hit brs are put into Schedv2._label_brl_map.
            self.assertEquals(reduce(lambda a, x: a + len(x[1]),
                                     schedv2._label_brl_map.iteritems(), 0),
                              60)


if __name__ == '__main__':
    test_flag.SetTestMode(True)
    unittest.main()