import pytest
import time
from unittest import mock
from uuid import uuid4

from django.test import TransactionTestCase

from awx.main.dispatch.worker.callback import job_stats_wrapup, CallbackBrokerWorker

from awx.main.models.jobs import Job
from awx.main.models.inventory import InventoryUpdate, InventorySource
from awx.main.models.events import InventoryUpdateEvent


@pytest.mark.django_db
def test_wrapup_does_not_send_notifications(mocker):
    job = Job.objects.create(status='running')
    assert job.host_status_counts is None
    mock = mocker.patch('awx.main.models.notifications.JobNotificationMixin.send_notification_templates')
    job_stats_wrapup(job.id)
    job.refresh_from_db()
    assert job.host_status_counts == {}
    mock.assert_not_called()


@pytest.mark.django_db
def test_wrapup_does_send_notifications(mocker):
    job = Job.objects.create(status='successful')
    assert job.host_status_counts is None
    mock = mocker.patch('awx.main.models.notifications.JobNotificationMixin.send_notification_templates')
    job_stats_wrapup(job.id)
    job.refresh_from_db()
    assert job.host_status_counts == {}
    mock.assert_called_once_with('succeeded')


class TestCallbackBrokerWorker(TransactionTestCase):
    @pytest.fixture(autouse=True)
    def turn_off_websockets_and_redis(self, fake_redis):
        with mock.patch('awx.main.dispatch.worker.callback.emit_event_detail', lambda *a, **kw: None):
            yield

    def event_create_kwargs(self):
        inventory_update = InventoryUpdate.objects.create(source='file', inventory_source=InventorySource.objects.create(source='file'))
        return dict(inventory_update=inventory_update, created=inventory_update.created)

    def test_flush_with_valid_event(self):
        worker = CallbackBrokerWorker()
        events = [InventoryUpdateEvent(uuid=str(uuid4()), **self.event_create_kwargs())]
        worker.buff = {InventoryUpdateEvent: events}
        worker.flush()
        assert worker.buff.get(InventoryUpdateEvent, []) == []
        assert InventoryUpdateEvent.objects.filter(uuid=events[0].uuid).count() == 1

    def test_flush_with_invalid_event(self):
        worker = CallbackBrokerWorker()
        kwargs = self.event_create_kwargs()
        events = [
            InventoryUpdateEvent(uuid=str(uuid4()), stdout='good1', **kwargs),
            InventoryUpdateEvent(uuid=str(uuid4()), stdout='bad', counter=-2, **kwargs),
            InventoryUpdateEvent(uuid=str(uuid4()), stdout='good2', **kwargs),
        ]
        worker.buff = {InventoryUpdateEvent: events.copy()}
        worker.flush()
        assert InventoryUpdateEvent.objects.filter(uuid=events[0].uuid).count() == 1
        assert InventoryUpdateEvent.objects.filter(uuid=events[1].uuid).count() == 0
        assert InventoryUpdateEvent.objects.filter(uuid=events[2].uuid).count() == 1
        assert worker.buff == {InventoryUpdateEvent: [events[1]]}

    def test_duplicate_key_not_saved_twice(self):
        worker = CallbackBrokerWorker()
        events = [InventoryUpdateEvent(uuid=str(uuid4()), **self.event_create_kwargs())]
        worker.buff = {InventoryUpdateEvent: events.copy()}
        worker.flush()

        # put current saved event in buffer (error case)
        worker.buff = {InventoryUpdateEvent: [InventoryUpdateEvent.objects.get(uuid=events[0].uuid)]}
        worker.last_flush = time.time() - 2.0
        # here, the bulk_create will fail with UNIQUE constraint violation, but individual saves should resolve it
        worker.flush()
        assert InventoryUpdateEvent.objects.filter(uuid=events[0].uuid).count() == 1
        assert worker.buff.get(InventoryUpdateEvent, []) == []

    def test_give_up_on_bad_event(self):
        worker = CallbackBrokerWorker()
        events = [InventoryUpdateEvent(uuid=str(uuid4()), counter=-2, **self.event_create_kwargs())]
        worker.buff = {InventoryUpdateEvent: events.copy()}

        for i in range(5):
            worker.last_flush = time.time() - 2.0
            worker.flush()

        # Could not save, should be logged, and buffer should be cleared
        assert worker.buff.get(InventoryUpdateEvent, []) == []
        assert InventoryUpdateEvent.objects.filter(uuid=events[0].uuid).count() == 0  # sanity

    def test_flush_with_empty_buffer(self):
        worker = CallbackBrokerWorker()
        worker.buff = {InventoryUpdateEvent: []}
        with mock.patch.object(InventoryUpdateEvent.objects, 'bulk_create') as flush_mock:
            worker.flush()
        flush_mock.assert_not_called()

    def test_postgres_invalid_NUL_char(self):
        # In postgres, text fields reject NUL character, 0x00
        # tests use sqlite3 which will not raise an error
        # but we can still test that it is sanitized before saving
        worker = CallbackBrokerWorker()
        kwargs = self.event_create_kwargs()
        events = [InventoryUpdateEvent(uuid=str(uuid4()), stdout="\x00", **kwargs)]
        assert "\x00" in events[0].stdout  # sanity
        worker.buff = {InventoryUpdateEvent: events.copy()}

        with mock.patch.object(InventoryUpdateEvent.objects, 'bulk_create', side_effect=ValueError):
            with mock.patch.object(events[0], 'save', side_effect=ValueError):
                worker.flush()

            assert "\x00" not in events[0].stdout

            worker.last_flush = time.time() - 2.0
            worker.flush()

            event = InventoryUpdateEvent.objects.get(uuid=events[0].uuid)
            assert "\x00" not in event.stdout