# This file is part of Buildbot.  Buildbot is free software: you can
# redistribute it and/or modify it under the terms of the GNU General Public
# License as published by the Free Software Foundation, version 2.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 51
# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Copyright Buildbot Team Members
import mock
from twisted.internet import defer
from twisted.internet import threads
from twisted.trial import unittest

from buildbot import config
from buildbot.errors import CaptureCallbackError
from buildbot.statistics import capture
from buildbot.statistics import storage_backends
from buildbot.statistics.storage_backends.base import StatsStorageBase
from buildbot.statistics.storage_backends.influxdb_client import InfluxStorageService
from buildbot.test.fake import fakedb
from buildbot.test.fake import fakemaster
from buildbot.test.fake import fakestats
from buildbot.test.util import logging
from buildbot.test.util import steps


class TestStatsServicesBase(unittest.TestCase):

    BUILDER_NAMES = [u'builder1', u'builder2']
    BUILDER_IDS = [1, 2]

    def setUp(self):
        self.master = fakemaster.make_master(testcase=self, wantMq=True,
                                             wantData=True, wantDb=True)

        for builderid, name in zip(self.BUILDER_IDS, self.BUILDER_NAMES):
            self.master.db.builders.addTestBuilder(
                builderid=builderid, name=name)

        self.stats_service = fakestats.FakeStatsService(master=self.master,
                                                        storage_backends=[
                                                            fakestats.FakeStatsStorageService()
                                                        ],
                                                        name="FakeStatsService")

        self.stats_service.startService()

    def tearDown(self):
        self.stats_service.stopService()


class DummyStatsStorageBase(StatsStorageBase):

    """
    A dummy class to test intialization of StatsStorageBase.
    """

    def thd_postStatsValue(self, *args, **kwargs):
        return defer.succeed(None)


class TestStatsServicesConfiguration(TestStatsServicesBase):

    def test_reconfig_with_no_storage_backends(self):
        new_storage_backends = []
        self.stats_service.reconfigService(new_storage_backends)
        self.checkEqual(new_storage_backends)

    def test_reconfig_with_fake_storage_backend(self):
        new_storage_backends = [
            fakestats.FakeStatsStorageService(name='One'),
            fakestats.FakeStatsStorageService(name='Two')
        ]
        self.stats_service.reconfigService(new_storage_backends)
        self.checkEqual(new_storage_backends)

    def test_bad_configuration(self):
        # Reconfigure with a bad configuration.
        new_storage_backends = [mock.Mock()]
        self.assertRaises(TypeError,
                          self.stats_service.reconfigService,
                          new_storage_backends)

    def checkEqual(self, new_storage_backends):
        # Check whether the new_storage_backends was set in reconfigService
        registeredStorageServices = \
            [s for s in self.stats_service.registeredStorageServices
             if isinstance(s, StatsStorageBase)]
        for s in new_storage_backends:
            if s not in registeredStorageServices:
                raise AssertionError("reconfigService failed."
                                     "Not all storage services registered.")


class TestInfluxDB(TestStatsServicesBase, logging.LoggingMixin):
    # Smooth test of influx db service. We don't want to force people to install influxdb, so we
    # just disable this unit test if the influxdb module is not installed,
    # using SkipTest

    def test_influxdb_not_installed(self):
        captures = [capture.CaptureProperty('test_builder', 'test')]
        try:
            # Try to import
            import influxdb
            # consume it somehow to please pylint
            [influxdb]
        except ImportError:
            self.assertRaises(config.ConfigErrors,
                              lambda: InfluxStorageService(
                                  "fake_url", "fake_port", "fake_user", "fake_password",
                                  "fake_db", captures))

        # if instead influxdb is installed, then intialize it - no errors
        # should be reaised
        else:
            new_storage_backends = [
                InfluxStorageService("fake_url", "fake_port", "fake_user", "fake_password",
                                     "fake_db", captures)
            ]
            self.stats_service.reconfigService(new_storage_backends)

    def test_influx_storage_service_fake_install(self):
        # use a fake InfluxDBClient to test InfluxStorageService in systems which
        # don't have influxdb installed. Primarily useful for test coverage.
        self.patch(storage_backends.influxdb_client,
                   'InfluxDBClient', fakestats.FakeInfluxDBClient)
        captures = [capture.CaptureProperty('test_builder', 'test')]
        new_storage_backends = [InfluxStorageService(
            "fake_url", "fake_port", "fake_user", "fake_password", "fake_db", captures
        )]
        self.stats_service.reconfigService(new_storage_backends)

    def test_influx_storage_service_post_value(self):
        # test the thd_postStatsValue method of InfluxStorageService
        self.patch(storage_backends.influxdb_client,
                   'InfluxDBClient', fakestats.FakeInfluxDBClient)
        svc = InfluxStorageService(
            "fake_url", "fake_port", "fake_user", "fake_password", "fake_db", "fake_stats")
        post_data = {
            'name': 'test',
            'value': 'test'
        }
        context = {'x': 'y'}
        svc.thd_postStatsValue(post_data, "test_series_name", context)
        data = {
            'measurement': "test_series_name",
            'fields': {
                "name": "test",
                "value": "test"
            },
            'tags': {'x': 'y'}
        }
        points = [data]
        self.assertEquals(svc.client.points, points)

    def test_influx_service_not_inited(self):
        self.setUpLogging()
        self.patch(storage_backends.influxdb_client,
                   'InfluxDBClient', fakestats.FakeInfluxDBClient)
        svc = InfluxStorageService(
            "fake_url", "fake_port", "fake_user", "fake_password", "fake_db", "fake_stats")
        svc._inited = False
        svc.thd_postStatsValue("test", "test", "test")
        self.assertLogged("Service.*not initialized")

    def test_storage_backend_base_failure_on_init(self):
        svc = DummyStatsStorageBase()

        r = svc.thd_postStatsValue("test", "test", "test")
        assert isinstance(r, defer.Deferred)
        assert r.result == None


class TestStatsServicesConsumers(steps.BuildStepMixin, TestStatsServicesBase):

    """
    Test the stats service from a fake step
    """

    def setUp(self):
        TestStatsServicesBase.setUp(self)
        self.routingKey = (
            "builders", self.BUILDER_IDS[0], "builds", 1, "finished")
        self.master.mq.verifyMessages = False
        self.patch(threads, 'deferToThread', self.identity)

    def setupBuild(self):
        self.master.db.insertTestData([
            fakedb.Build(id=1, masterid=1, workerid=1,
                         builderid=self.BUILDER_IDS[0],
                         buildrequestid=1, number=1),
        ])

    def setupFakeStorage(self, captures):
        self.fake_storage_service = fakestats.FakeStatsStorageService()
        self.fake_storage_service.captures = captures
        self.stats_service.reconfigService([self.fake_storage_service])

    def get_dict(self, build):
        return dict(
            buildid=1,
            number=build['number'],
            builderid=build['builderid'],
            buildrequestid=build['buildrequestid'],
            workerid=build['workerid'],
            masterid=build['masterid'],
            started_at=build['started_at'],
            complete=True,
            complete_at=build['complete_at'],
            state_string=u'',
            results=0,
        )

    @defer.inlineCallbacks
    def end_build_call_consumers(self):
        self.master.db.builds.finishBuild(buildid=1, results=0)
        build = yield self.master.db.builds.getBuild(buildid=1)
        self.master.mq.callConsumer(self.routingKey, self.get_dict(build))

    @staticmethod
    def identity(f, *args, **kwargs):
        return f(*args, **kwargs)

    @defer.inlineCallbacks
    def test_property_capturing(self):
        self.setupFakeStorage(
            [capture.CaptureProperty('builder1', 'test_name')])
        self.setupBuild()
        self.master.db.builds.setBuildProperty(
            1, 'test_name', 'test_value', 'test_source')
        yield self.end_build_call_consumers()

        self.assertEqual([(
            {'name': 'test_name', 'value': 'test_value'},
            'builder1-test_name',
            {'build_number': '1', 'builder_name': 'builder1'}
        )], self.fake_storage_service.stored_data)

    @defer.inlineCallbacks
    def test_property_capturing_all_builders(self):
        self.setupFakeStorage(
            [capture.CapturePropertyAllBuilders('test_name')])
        self.setupBuild()
        self.master.db.builds.setBuildProperty(
            1, 'test_name', 'test_value', 'test_source')
        yield self.end_build_call_consumers()

        self.assertEqual([(
            {'name': 'test_name', 'value': 'test_value'},
            'builder1-test_name',
            {'build_number': '1', 'builder_name': 'builder1'}
        )], self.fake_storage_service.stored_data)

    @defer.inlineCallbacks
    def test_property_capturing_regex(self):
        self.setupFakeStorage(
            [capture.CaptureProperty('builder1', 'test_n.*', regex=True)])
        self.setupBuild()
        self.master.db.builds.setBuildProperty(
            1, 'test_name', 'test_value', 'test_source')
        yield self.end_build_call_consumers()

        self.assertEqual([(
            {'name': 'test_name', 'value': 'test_value'},
            'builder1-test_name',
            {'build_number': '1', 'builder_name': 'builder1'}
        )], self.fake_storage_service.stored_data)

    @defer.inlineCallbacks
    def test_property_capturing_error(self):
        self.setupFakeStorage([capture.CaptureProperty('builder1', 'test')])
        self.setupBuild()
        self.master.db.builds.setBuildProperty(
            1, 'test_name', 'test_value', 'test_source')
        self.master.db.builds.finishBuild(buildid=1, results=0)
        build = yield self.master.db.builds.getBuild(buildid=1)
        cap = self.fake_storage_service.captures[0]
        self.assertFailure(cap.consume(self.routingKey, self.get_dict(build)),
                           CaptureCallbackError)

    @defer.inlineCallbacks
    def test_property_capturing_alt_callback(self):
        def cb(*args, **kwargs):
            return 'test_value'
        self.setupFakeStorage(
            [capture.CaptureProperty('builder1', 'test_name', cb)])
        self.setupBuild()
        self.master.db.builds.setBuildProperty(
            1, 'test_name', 'test_value', 'test_source')
        yield self.end_build_call_consumers()

        self.assertEqual([(
            {'name': 'test_name', 'value': 'test_value'},
            'builder1-test_name',
            {'build_number': '1', 'builder_name': 'builder1'}
        )], self.fake_storage_service.stored_data)

    @defer.inlineCallbacks
    def test_build_start_time_capturing(self):
        self.setupFakeStorage([capture.CaptureBuildStartTime('builder1')])
        self.setupBuild()
        yield self.end_build_call_consumers()

        self.assertEqual(
            'start-time', self.fake_storage_service.stored_data[0][0].keys()[0])

    @defer.inlineCallbacks
    def test_build_start_time_capturing_all_builders(self):
        self.setupFakeStorage([capture.CaptureBuildStartTimeAllBuilders()])
        self.setupBuild()
        yield self.end_build_call_consumers()

        self.assertEqual(
            'start-time', self.fake_storage_service.stored_data[0][0].keys()[0])

    @defer.inlineCallbacks
    def test_build_start_time_capturing_alt_callback(self):
        def cb(*args, **kwargs):
            return '2015-07-08T01:45:17.391018'
        self.setupFakeStorage([capture.CaptureBuildStartTime('builder1', cb)])
        self.setupBuild()
        yield self.end_build_call_consumers()

        self.assertEqual(
            'start-time', self.fake_storage_service.stored_data[0][0].keys()[0])

    @defer.inlineCallbacks
    def test_build_end_time_capturing(self):
        self.setupFakeStorage([capture.CaptureBuildEndTime('builder1')])
        self.setupBuild()
        yield self.end_build_call_consumers()

        self.assertEqual(
            'end-time', self.fake_storage_service.stored_data[0][0].keys()[0])

    @defer.inlineCallbacks
    def test_build_end_time_capturing_all_builders(self):
        self.setupFakeStorage([capture.CaptureBuildEndTimeAllBuilders()])
        self.setupBuild()
        yield self.end_build_call_consumers()

        self.assertEqual(
            'end-time', self.fake_storage_service.stored_data[0][0].keys()[0])

    @defer.inlineCallbacks
    def test_build_end_time_capturing_alt_callback(self):
        def cb(*args, **kwargs):
            return '2015-07-08T01:45:17.391018'
        self.setupFakeStorage([capture.CaptureBuildEndTime('builder1', cb)])
        self.setupBuild()
        yield self.end_build_call_consumers()

        self.assertEqual(
            'end-time', self.fake_storage_service.stored_data[0][0].keys()[0])

    @defer.inlineCallbacks
    def build_time_capture_helper(self, time_type, cb=None):
        self.setupFakeStorage([capture.CaptureBuildDuration('builder1', report_in=time_type,
                                                            callback=cb)])
        self.setupBuild()
        yield self.end_build_call_consumers()

    @defer.inlineCallbacks
    def test_build_duration_capturing_seconds(self):
        yield self.build_time_capture_helper('seconds')
        self.assertEqual(
            'duration', self.fake_storage_service.stored_data[0][0].keys()[0])

    @defer.inlineCallbacks
    def test_build_duration_capturing_minutes(self):
        yield self.build_time_capture_helper('minutes')
        self.assertEqual(
            'duration', self.fake_storage_service.stored_data[0][0].keys()[0])

    @defer.inlineCallbacks
    def test_build_duration_capturing_hours(self):
        yield self.build_time_capture_helper('hours')
        self.assertEqual(
            'duration', self.fake_storage_service.stored_data[0][0].keys()[0])

    def test_build_duration_report_in_error(self):
        self.assertRaises(config.ConfigErrors,
                          lambda: capture.CaptureBuildDuration('builder1', report_in='foobar'))

    @defer.inlineCallbacks
    def test_build_duration_capturing_alt_callback(self):
        def cb(*args, **kwargs):
            return 10
        yield self.build_time_capture_helper('seconds', cb)
        self.assertEqual(
            'duration', self.fake_storage_service.stored_data[0][0].keys()[0])

    @defer.inlineCallbacks
    def test_build_duration_capturing_all_builders(self):
        self.setupFakeStorage([capture.CaptureBuildDurationAllBuilders()])
        self.setupBuild()
        yield self.end_build_call_consumers()

        self.assertEqual(
            'duration', self.fake_storage_service.stored_data[0][0].keys()[0])

    @defer.inlineCallbacks
    def test_build_times_capturing_error(self):
        def cb(*args, **kwargs):
            raise TypeError
        self.setupFakeStorage([capture.CaptureBuildStartTime('builder1', cb)])
        self.setupBuild()
        self.master.db.builds.setBuildProperty(
            1, 'test_name', 'test_value', 'test_source')
        self.master.db.builds.finishBuild(buildid=1, results=0)
        build = yield self.master.db.builds.getBuild(buildid=1)
        cap = self.fake_storage_service.captures[0]
        self.assertFailure(cap.consume(self.routingKey, self.get_dict(build)),
                           CaptureCallbackError)

        self.setupFakeStorage([capture.CaptureBuildEndTime('builder1', cb)])
        cap = self.fake_storage_service.captures[0]
        self.assertFailure(cap.consume(self.routingKey, self.get_dict(build)),
                           CaptureCallbackError)

        self.setupFakeStorage(
            [capture.CaptureBuildDuration('builder1', callback=cb)])
        cap = self.fake_storage_service.captures[0]
        self.assertFailure(cap.consume(self.routingKey, self.get_dict(build)),
                           CaptureCallbackError)

    @defer.inlineCallbacks
    def test_yield_metrics_value(self):
        self.setupFakeStorage([capture.CaptureBuildStartTime('builder1')])
        self.setupBuild()
        yield self.end_build_call_consumers()
        yield self.stats_service.yieldMetricsValue('test', {'test': 'test'}, 1)

        build_data = yield self.stats_service.master.data.get(('builds', 1))
        routingKey = ("stats-yieldMetricsValue", "stats-yield-data")

        msg = {
            'data_name': 'test',
            'post_data': {'test': 'test'},
            'build_data': build_data
        }

        exp = [(routingKey, msg)]
        self.stats_service.master.mq.assertProductions(exp)

    @defer.inlineCallbacks
    def test_capture_data(self):
        self.setupFakeStorage([capture.CaptureData('test', 'builder1')])
        self.setupBuild()
        self.master.db.builds.finishBuild(buildid=1, results=0)
        build_data = yield self.stats_service.master.data.get(('builds', 1))

        msg = {
            'data_name': 'test',
            'post_data': {'test': 'test'},
            'build_data': build_data
        }

        routingKey = ("stats-yieldMetricsValue", "stats-yield-data")
        self.master.mq.callConsumer(routingKey, msg)
        self.assertEqual([(
            {'test': 'test'},
            'builder1-test',
            {'build_number': '1', 'builder_name': 'builder1'}
        )], self.fake_storage_service.stored_data)

    @defer.inlineCallbacks
    def test_capture_data_all_builders(self):
        self.setupFakeStorage([capture.CaptureDataAllBuilders('test')])
        self.setupBuild()
        self.master.db.builds.finishBuild(buildid=1, results=0)
        build_data = yield self.stats_service.master.data.get(('builds', 1))

        msg = {
            'data_name': 'test',
            'post_data': {'test': 'test'},
            'build_data': build_data
        }

        routingKey = ("stats-yieldMetricsValue", "stats-yield-data")
        self.master.mq.callConsumer(routingKey, msg)
        self.assertEqual([(
            {'test': 'test'},
            'builder1-test',
            {'build_number': '1', 'builder_name': 'builder1'}
        )], self.fake_storage_service.stored_data)

    @defer.inlineCallbacks
    def test_capture_data_alt_callback(self):
        def cb(*args, **kwargs):
            return {'test': 'test'}
        self.setupFakeStorage([capture.CaptureData('test', 'builder1', cb)])
        self.setupBuild()
        self.master.db.builds.finishBuild(buildid=1, results=0)
        build_data = yield self.stats_service.master.data.get(('builds', 1))

        msg = {
            'data_name': 'test',
            'post_data': {'test': 'test'},
            'build_data': build_data
        }

        routingKey = ("stats-yieldMetricsValue", "stats-yield-data")
        self.master.mq.callConsumer(routingKey, msg)
        self.assertEqual([(
            {'test': 'test'},
            'builder1-test',
            {'build_number': '1', 'builder_name': 'builder1'}
        )], self.fake_storage_service.stored_data)

    @defer.inlineCallbacks
    def test_capture_data_error(self):
        def cb(*args, **kwargs):
            raise TypeError
        self.setupFakeStorage([capture.CaptureData('test', 'builder1', cb)])
        self.setupBuild()
        self.master.db.builds.finishBuild(buildid=1, results=0)
        build_data = yield self.stats_service.master.data.get(('builds', 1))

        msg = {
            'data_name': 'test',
            'post_data': {'test': 'test'},
            'build_data': build_data
        }

        routingKey = ("stats-yieldMetricsValue", "stats-yield-data")
        cap = self.fake_storage_service.captures[0]
        self.assertFailure(cap.consume(routingKey, msg), CaptureCallbackError)
