from datetime import date, datetime, timedelta
from unittest import mock
from uuid import UUID

import pytest
from freezegun import freeze_time

from app.dao.fact_notification_status_dao import (
    fetch_monthly_notification_statuses_per_service,
    fetch_monthly_template_usage_for_service,
    fetch_notification_status_for_service_by_month,
    fetch_notification_status_for_service_for_day,
    fetch_notification_status_for_service_for_today_and_7_previous_days,
    fetch_notification_status_totals_for_all_services,
    fetch_notification_statuses_for_job,
    fetch_stats_for_all_services_by_date_range,
    get_total_notifications_for_date_range,
    update_fact_notification_status,
)
from app.models import (
    EMAIL_TYPE,
    KEY_TYPE_TEAM,
    KEY_TYPE_TEST,
    LETTER_TYPE,
    NOTIFICATION_CREATED,
    NOTIFICATION_DELIVERED,
    NOTIFICATION_FAILED,
    NOTIFICATION_PENDING,
    NOTIFICATION_PERMANENT_FAILURE,
    NOTIFICATION_SENDING,
    NOTIFICATION_SENT,
    NOTIFICATION_TECHNICAL_FAILURE,
    NOTIFICATION_TEMPORARY_FAILURE,
    SMS_TYPE,
    FactNotificationStatus,
)
from tests.app.db import (
    create_ft_notification_status,
    create_job,
    create_notification,
    create_service,
    create_template,
)


def test_fetch_notification_status_for_service_by_month(notify_db_session):
    service_1 = create_service(service_name='service_1')
    service_2 = create_service(service_name='service_2')

    create_ft_notification_status(date(2018, 1, 1), 'sms', service_1, count=4)
    create_ft_notification_status(date(2018, 1, 2), 'sms', service_1, count=10)
    create_ft_notification_status(date(2018, 1, 2), 'sms', service_1, notification_status='created')
    create_ft_notification_status(date(2018, 1, 3), 'email', service_1)

    create_ft_notification_status(date(2018, 2, 2), 'sms', service_1)

    # not included - too early
    create_ft_notification_status(date(2017, 12, 31), 'sms', service_1)
    # not included - too late
    create_ft_notification_status(date(2017, 3, 1), 'sms', service_1)
    # not included - wrong service
    create_ft_notification_status(date(2018, 1, 3), 'sms', service_2)
    # not included - test keys
    create_ft_notification_status(date(2018, 1, 3), 'sms', service_1, key_type=KEY_TYPE_TEST)

    results = sorted(
        fetch_notification_status_for_service_by_month(date(2018, 1, 1), date(2018, 2, 28), service_1.id),
        key=lambda x: (x.month, x.notification_type, x.notification_status)
    )

    assert len(results) == 4

    assert results[0].month.date() == date(2018, 1, 1)
    assert results[0].notification_type == 'email'
    assert results[0].notification_status == 'delivered'
    assert results[0].count == 1

    assert results[1].month.date() == date(2018, 1, 1)
    assert results[1].notification_type == 'sms'
    assert results[1].notification_status == 'created'
    assert results[1].count == 1

    assert results[2].month.date() == date(2018, 1, 1)
    assert results[2].notification_type == 'sms'
    assert results[2].notification_status == 'delivered'
    assert results[2].count == 14

    assert results[3].month.date() == date(2018, 2, 1)
    assert results[3].notification_type == 'sms'
    assert results[3].notification_status == 'delivered'
    assert results[3].count == 1


def test_fetch_notification_status_for_service_for_day(notify_db_session):
    service_1 = create_service(service_name='service_1')
    service_2 = create_service(service_name='service_2')

    create_template(service=service_1)
    create_template(service=service_2)

    # too early
    create_notification(service_1.templates[0], created_at=datetime(2018, 5, 31, 22, 59, 0))

    # included
    create_notification(service_1.templates[0], created_at=datetime(2018, 5, 31, 23, 0, 0))
    create_notification(service_1.templates[0], created_at=datetime(2018, 6, 1, 22, 59, 0))
    create_notification(service_1.templates[0], created_at=datetime(2018, 6, 1, 12, 0, 0), key_type=KEY_TYPE_TEAM)
    create_notification(service_1.templates[0], created_at=datetime(2018, 6, 1, 12, 0, 0), status='delivered')

    # test key
    create_notification(service_1.templates[0], created_at=datetime(2018, 6, 1, 12, 0, 0), key_type=KEY_TYPE_TEST)

    # wrong service
    create_notification(service_2.templates[0], created_at=datetime(2018, 6, 1, 12, 0, 0))

    # tomorrow (somehow)
    create_notification(service_1.templates[0], created_at=datetime(2018, 6, 1, 23, 0, 0))

    results = sorted(
        fetch_notification_status_for_service_for_day(datetime(2018, 6, 1), service_1.id),
        key=lambda x: x.notification_status
    )
    assert len(results) == 2

    assert results[0].month == datetime(2018, 6, 1, 0, 0)
    assert results[0].notification_type == 'sms'
    assert results[0].notification_status == 'created'
    assert results[0].count == 3

    assert results[1].month == datetime(2018, 6, 1, 0, 0)
    assert results[1].notification_type == 'sms'
    assert results[1].notification_status == 'delivered'
    assert results[1].count == 1


@freeze_time('2018-10-31T18:00:00')
def test_fetch_notification_status_for_service_for_today_and_7_previous_days(notify_db_session):
    service_1 = create_service(service_name='service_1')
    sms_template = create_template(service=service_1, template_type=SMS_TYPE)
    sms_template_2 = create_template(service=service_1, template_type=SMS_TYPE)
    email_template = create_template(service=service_1, template_type=EMAIL_TYPE)

    create_ft_notification_status(date(2018, 10, 29), 'sms', service_1, count=10)
    create_ft_notification_status(date(2018, 10, 24), 'sms', service_1, count=8)
    create_ft_notification_status(date(2018, 10, 29), 'sms', service_1, notification_status='created')
    create_ft_notification_status(date(2018, 10, 29), 'email', service_1, count=3)
    create_ft_notification_status(date(2018, 10, 26), 'letter', service_1, count=5)

    create_notification(sms_template, created_at=datetime(2018, 10, 31, 11, 0, 0))
    create_notification(sms_template_2, created_at=datetime(2018, 10, 31, 11, 0, 0))
    create_notification(sms_template, created_at=datetime(2018, 10, 31, 12, 0, 0), status='delivered')
    create_notification(email_template, created_at=datetime(2018, 10, 31, 13, 0, 0), status='delivered')

    # too early, shouldn't be included
    create_notification(service_1.templates[0], created_at=datetime(2018, 10, 30, 12, 0, 0), status='delivered')

    results = sorted(
        fetch_notification_status_for_service_for_today_and_7_previous_days(service_1.id),
        key=lambda x: (x.notification_type, x.status)
    )

    assert len(results) == 4

    assert results[0].notification_type == 'email'
    assert results[0].status == 'delivered'
    assert results[0].count == 4

    assert results[1].notification_type == 'letter'
    assert results[1].status == 'delivered'
    assert results[1].count == 5

    assert results[2].notification_type == 'sms'
    assert results[2].status == 'created'
    assert results[2].count == 3

    assert results[3].notification_type == 'sms'
    assert results[3].status == 'delivered'
    assert results[3].count == 19


@freeze_time('2018-10-31T18:00:00')
def test_fetch_notification_status_by_template_for_service_for_today_and_7_previous_days(notify_db_session):
    service_1 = create_service(service_name='service_1')
    sms_template = create_template(template_name='sms Template 1', service=service_1, template_type=SMS_TYPE)
    sms_template_2 = create_template(template_name='sms Template 2', service=service_1, template_type=SMS_TYPE)
    email_template = create_template(service=service_1, template_type=EMAIL_TYPE)

    # create unused email template
    create_template(service=service_1, template_type=EMAIL_TYPE)

    create_ft_notification_status(date(2018, 10, 29), 'sms', service_1, count=10)
    create_ft_notification_status(date(2018, 10, 29), 'sms', service_1, count=11)
    create_ft_notification_status(date(2018, 10, 24), 'sms', service_1, count=8)
    create_ft_notification_status(date(2018, 10, 29), 'sms', service_1, notification_status='created')
    create_ft_notification_status(date(2018, 10, 29), 'email', service_1, count=3)
    create_ft_notification_status(date(2018, 10, 26), 'letter', service_1, count=5)

    create_notification(sms_template, created_at=datetime(2018, 10, 31, 11, 0, 0))
    create_notification(sms_template, created_at=datetime(2018, 10, 31, 12, 0, 0), status='delivered')
    create_notification(sms_template_2, created_at=datetime(2018, 10, 31, 12, 0, 0), status='delivered')
    create_notification(email_template, created_at=datetime(2018, 10, 31, 13, 0, 0), status='delivered')

    # too early, shouldn't be included
    create_notification(service_1.templates[0], created_at=datetime(2018, 10, 30, 12, 0, 0), status='delivered')

    results = fetch_notification_status_for_service_for_today_and_7_previous_days(service_1.id, by_template=True)

    assert [
        ('email Template Name', False, mock.ANY, 'email', 'delivered', 1),
        ('email Template Name', False, mock.ANY, 'email', 'delivered', 3),
        ('letter Template Name', False, mock.ANY, 'letter', 'delivered', 5),
        ('sms Template 1', False, mock.ANY, 'sms', 'created', 1),
        ('sms Template Name', False, mock.ANY, 'sms', 'created', 1),
        ('sms Template 1', False, mock.ANY, 'sms', 'delivered', 1),
        ('sms Template 2', False, mock.ANY, 'sms', 'delivered', 1),
        ('sms Template Name', False, mock.ANY, 'sms', 'delivered', 8),
        ('sms Template Name', False, mock.ANY, 'sms', 'delivered', 10),
        ('sms Template Name', False, mock.ANY, 'sms', 'delivered', 11),
    ] == sorted(results, key=lambda x: (x.notification_type, x.status, x.template_name, x.count))


@pytest.mark.parametrize(
    "start_date, end_date, expected_email, expected_letters, expected_sms, expected_created_sms",
    [
        (29, 30, 3, 10, 10, 1),  # not including today
        (29, 31, 4, 10, 11, 2),  # today included
        (26, 31, 4, 15, 11, 2),
    ]

)
@freeze_time('2018-10-31 14:00')
def test_fetch_notification_status_totals_for_all_services(
        notify_db_session,
        start_date,
        end_date,
        expected_email,
        expected_letters,
        expected_sms,
        expected_created_sms
):
    set_up_data()

    results = sorted(
        fetch_notification_status_totals_for_all_services(
            start_date=date(2018, 10, start_date), end_date=date(2018, 10, end_date)),
        key=lambda x: (x.notification_type, x.status)
    )

    assert len(results) == 4

    assert results[0].notification_type == 'email'
    assert results[0].status == 'delivered'
    assert results[0].count == expected_email

    assert results[1].notification_type == 'letter'
    assert results[1].status == 'delivered'
    assert results[1].count == expected_letters

    assert results[2].notification_type == 'sms'
    assert results[2].status == 'created'
    assert results[2].count == expected_created_sms

    assert results[3].notification_type == 'sms'
    assert results[3].status == 'delivered'
    assert results[3].count == expected_sms


@freeze_time('2018-04-21 14:00')
def test_fetch_notification_status_totals_for_all_services_works_in_bst(
        notify_db_session
):
    service_1 = create_service(service_name='service_1')
    sms_template = create_template(service=service_1, template_type=SMS_TYPE)
    email_template = create_template(service=service_1, template_type=EMAIL_TYPE)

    create_notification(sms_template, created_at=datetime(2018, 4, 20, 12, 0, 0), status='delivered')
    create_notification(sms_template, created_at=datetime(2018, 4, 21, 11, 0, 0), status='created')
    create_notification(sms_template, created_at=datetime(2018, 4, 21, 12, 0, 0), status='delivered')
    create_notification(email_template, created_at=datetime(2018, 4, 21, 13, 0, 0), status='delivered')
    create_notification(email_template, created_at=datetime(2018, 4, 21, 14, 0, 0), status='delivered')

    results = sorted(
        fetch_notification_status_totals_for_all_services(
            start_date=date(2018, 4, 21), end_date=date(2018, 4, 21)),
        key=lambda x: (x.notification_type, x.status)
    )

    assert len(results) == 3

    assert results[0].notification_type == 'email'
    assert results[0].status == 'delivered'
    assert results[0].count == 2

    assert results[1].notification_type == 'sms'
    assert results[1].status == 'created'
    assert results[1].count == 1

    assert results[2].notification_type == 'sms'
    assert results[2].status == 'delivered'
    assert results[2].count == 1


def set_up_data():
    service_2 = create_service(service_name='service_2')
    create_template(service=service_2, template_type=LETTER_TYPE)
    service_1 = create_service(service_name='service_1')
    sms_template = create_template(service=service_1, template_type=SMS_TYPE)
    email_template = create_template(service=service_1, template_type=EMAIL_TYPE)
    create_ft_notification_status(date(2018, 10, 24), 'sms', service_1, count=8)
    create_ft_notification_status(date(2018, 10, 26), 'letter', service_1, count=5)
    create_ft_notification_status(date(2018, 10, 29), 'sms', service_1, count=10)
    create_ft_notification_status(date(2018, 10, 29), 'sms', service_1, notification_status='created')
    create_ft_notification_status(date(2018, 10, 29), 'email', service_1, count=3)
    create_ft_notification_status(date(2018, 10, 29), 'letter', service_2, count=10)

    create_notification(service_1.templates[0], created_at=datetime(2018, 10, 30, 12, 0, 0), status='delivered')
    create_notification(sms_template, created_at=datetime(2018, 10, 31, 11, 0, 0))
    create_notification(sms_template, created_at=datetime(2018, 10, 31, 12, 0, 0), status='delivered')
    create_notification(email_template, created_at=datetime(2018, 10, 31, 13, 0, 0), status='delivered')
    return service_1, service_2


def test_fetch_notification_statuses_for_job(sample_template):
    j1 = create_job(sample_template)
    j2 = create_job(sample_template)

    create_ft_notification_status(date(2018, 10, 1), job=j1, notification_status='created', count=1)
    create_ft_notification_status(date(2018, 10, 1), job=j1, notification_status='delivered', count=2)
    create_ft_notification_status(date(2018, 10, 2), job=j1, notification_status='created', count=4)
    create_ft_notification_status(date(2018, 10, 1), job=j2, notification_status='created', count=8)

    assert {x.status: x.count for x in fetch_notification_statuses_for_job(j1.id)} == {
        'created': 5,
        'delivered': 2
    }


@freeze_time('2018-10-31 14:00')
def test_fetch_stats_for_all_services_by_date_range(notify_db_session):
    service_1, service_2 = set_up_data()
    results = fetch_stats_for_all_services_by_date_range(start_date=date(2018, 10, 29),
                                                         end_date=date(2018, 10, 31))
    assert len(results) == 5

    assert results[0].service_id == service_1.id
    assert results[0].notification_type == 'email'
    assert results[0].status == 'delivered'
    assert results[0].count == 4

    assert results[1].service_id == service_1.id
    assert results[1].notification_type == 'sms'
    assert results[1].status == 'created'
    assert results[1].count == 2

    assert results[2].service_id == service_1.id
    assert results[2].notification_type == 'sms'
    assert results[2].status == 'delivered'
    assert results[2].count == 11

    assert results[3].service_id == service_2.id
    assert results[3].notification_type == 'letter'
    assert results[3].status == 'delivered'
    assert results[3].count == 10

    assert results[4].service_id == service_2.id
    assert not results[4].notification_type
    assert not results[4].status
    assert not results[4].count


@freeze_time('2018-03-30 14:00')
def test_fetch_monthly_template_usage_for_service(sample_service):
    template_one = create_template(service=sample_service, template_type='sms', template_name='a')
    template_two = create_template(service=sample_service, template_type='email', template_name='b')
    template_three = create_template(service=sample_service, template_type='letter', template_name='c')

    create_ft_notification_status(bst_date=date(2017, 12, 10),
                                  service=sample_service,
                                  template=template_two,
                                  count=3)
    create_ft_notification_status(bst_date=date(2017, 12, 10),
                                  service=sample_service,
                                  template=template_one,
                                  count=6)

    create_ft_notification_status(bst_date=date(2018, 1, 1),
                                  service=sample_service,
                                  template=template_one,
                                  count=4)

    create_ft_notification_status(bst_date=date(2018, 3, 1),
                                  service=sample_service,
                                  template=template_three,
                                  count=5)
    create_notification(template=template_three, created_at=datetime.utcnow() - timedelta(days=1))
    create_notification(template=template_three, created_at=datetime.utcnow())
    results = fetch_monthly_template_usage_for_service(
        datetime(2017, 4, 1), datetime(2018, 3, 31), sample_service.id
    )

    assert len(results) == 4

    assert results[0].template_id == template_one.id
    assert results[0].name == template_one.name
    assert results[0].is_precompiled_letter is False
    assert results[0].template_type == template_one.template_type
    assert results[0].month == 12
    assert results[0].year == 2017
    assert results[0].count == 6
    assert results[1].template_id == template_two.id
    assert results[1].name == template_two.name
    assert results[1].is_precompiled_letter is False
    assert results[1].template_type == template_two.template_type
    assert results[1].month == 12
    assert results[1].year == 2017
    assert results[1].count == 3

    assert results[2].template_id == template_one.id
    assert results[2].name == template_one.name
    assert results[2].is_precompiled_letter is False
    assert results[2].template_type == template_one.template_type
    assert results[2].month == 1
    assert results[2].year == 2018
    assert results[2].count == 4

    assert results[3].template_id == template_three.id
    assert results[3].name == template_three.name
    assert results[3].is_precompiled_letter is False
    assert results[3].template_type == template_three.template_type
    assert results[3].month == 3
    assert results[3].year == 2018
    assert results[3].count == 6


@freeze_time('2018-03-30 14:00')
def test_fetch_monthly_template_usage_for_service_does_join_to_notifications_if_today_is_not_in_date_range(
        sample_service
):
    template_one = create_template(service=sample_service, template_type='sms', template_name='a')
    template_two = create_template(service=sample_service, template_type='email', template_name='b')
    create_ft_notification_status(bst_date=date(2018, 2, 1),
                                  service=template_two.service,
                                  template=template_two,
                                  count=15)
    create_ft_notification_status(bst_date=date(2018, 2, 2),
                                  service=template_one.service,
                                  template=template_one,
                                  count=20)
    create_ft_notification_status(bst_date=date(2018, 3, 1),
                                  service=template_one.service,
                                  template=template_one,
                                  count=3)
    create_notification(template=template_one, created_at=datetime.utcnow())
    results = fetch_monthly_template_usage_for_service(
        datetime(2018, 1, 1), datetime(2018, 2, 20), template_one.service_id
    )

    assert len(results) == 2

    assert results[0].template_id == template_one.id
    assert results[0].name == template_one.name
    assert results[0].is_precompiled_letter == template_one.is_precompiled_letter
    assert results[0].template_type == template_one.template_type
    assert results[0].month == 2
    assert results[0].year == 2018
    assert results[0].count == 20
    assert results[1].template_id == template_two.id
    assert results[1].name == template_two.name
    assert results[1].is_precompiled_letter == template_two.is_precompiled_letter
    assert results[1].template_type == template_two.template_type
    assert results[1].month == 2
    assert results[1].year == 2018
    assert results[1].count == 15


@freeze_time('2018-03-30 14:00')
def test_fetch_monthly_template_usage_for_service_does_not_include_cancelled_status(
        sample_template
):
    create_ft_notification_status(bst_date=date(2018, 3, 1),
                                  service=sample_template.service,
                                  template=sample_template,
                                  notification_status='cancelled',
                                  count=15)
    create_notification(template=sample_template, created_at=datetime.utcnow(), status='cancelled')
    results = fetch_monthly_template_usage_for_service(
        datetime(2018, 1, 1), datetime(2018, 3, 31), sample_template.service_id
    )

    assert len(results) == 0


@freeze_time('2018-03-30 14:00')
def test_fetch_monthly_template_usage_for_service_does_not_include_test_notifications(
        sample_template
):
    create_ft_notification_status(bst_date=date(2018, 3, 1),
                                  service=sample_template.service,
                                  template=sample_template,
                                  notification_status='delivered',
                                  key_type='test',
                                  count=15)
    create_notification(template=sample_template,
                        created_at=datetime.utcnow(),
                        status='delivered',
                        key_type='test',)
    results = fetch_monthly_template_usage_for_service(
        datetime(2018, 1, 1), datetime(2018, 3, 31), sample_template.service_id
    )

    assert len(results) == 0


@freeze_time('2019-05-10 14:00')
def test_fetch_monthly_notification_statuses_per_service(notify_db_session):
    service_one = create_service(service_name='service one', service_id=UUID('e4e34c4e-73c1-4802-811c-3dd273f21da4'))
    service_two = create_service(service_name='service two', service_id=UUID('b19d7aad-6f09-4198-8b62-f6cf126b87e5'))

    create_ft_notification_status(date(2019, 4, 30), notification_type='letter', service=service_one,
                                  notification_status=NOTIFICATION_DELIVERED)
    create_ft_notification_status(date(2019, 3, 1), notification_type='email', service=service_one,
                                  notification_status=NOTIFICATION_SENDING, count=4)
    create_ft_notification_status(date(2019, 3, 1), notification_type='email', service=service_one,
                                  notification_status=NOTIFICATION_PENDING, count=1)
    create_ft_notification_status(date(2019, 3, 2), notification_type='email', service=service_one,
                                  notification_status=NOTIFICATION_TECHNICAL_FAILURE, count=2)
    create_ft_notification_status(date(2019, 3, 7), notification_type='email', service=service_one,
                                  notification_status=NOTIFICATION_FAILED, count=1)
    create_ft_notification_status(date(2019, 3, 10), notification_type='letter', service=service_two,
                                  notification_status=NOTIFICATION_PERMANENT_FAILURE, count=1)
    create_ft_notification_status(date(2019, 3, 10), notification_type='letter', service=service_two,
                                  notification_status=NOTIFICATION_PERMANENT_FAILURE, count=1)
    create_ft_notification_status(date(2019, 3, 13), notification_type='sms', service=service_one,
                                  notification_status=NOTIFICATION_SENT, count=1)
    create_ft_notification_status(date(2019, 4, 1), notification_type='letter', service=service_two,
                                  notification_status=NOTIFICATION_TEMPORARY_FAILURE, count=10)
    create_ft_notification_status(date(2019, 3, 31), notification_type='letter', service=service_one,
                                  notification_status=NOTIFICATION_DELIVERED)

    results = fetch_monthly_notification_statuses_per_service(date(2019, 3, 1), date(2019, 4, 30))

    assert len(results) == 6
    # column order: date, service_id, service_name, notifaction_type, count_sending, count_delivered,
    # count_technical_failure, count_temporary_failure, count_permanent_failure, count_sent
    assert [x for x in results[0]] == [date(2019, 3, 1), service_two.id, 'service two', 'letter', 0, 0, 0, 0, 2, 0]
    assert [x for x in results[1]] == [date(2019, 3, 1), service_one.id, 'service one', 'email', 5, 0, 3, 0, 0, 0]
    assert [x for x in results[2]] == [date(2019, 3, 1), service_one.id, 'service one', 'letter', 0, 1, 0, 0, 0, 0]
    assert [x for x in results[3]] == [date(2019, 3, 1), service_one.id, 'service one', 'sms', 0, 0, 0, 0, 0, 1]
    assert [x for x in results[4]] == [date(2019, 4, 1), service_two.id, 'service two', 'letter', 0, 0, 0, 10, 0, 0]
    assert [x for x in results[5]] == [date(2019, 4, 1), service_one.id, 'service one', 'letter', 0, 1, 0, 0, 0, 0]


@freeze_time('2019-04-10 14:00')
def test_fetch_monthly_notification_statuses_per_service_for_rows_that_should_be_excluded(notify_db_session):
    valid_service = create_service(service_name='valid service')
    inactive_service = create_service(service_name='inactive', active=False)
    research_mode_service = create_service(service_name='research_mode', research_mode=True)
    restricted_service = create_service(service_name='restricted', restricted=True)

    # notification in 'created' state
    create_ft_notification_status(date(2019, 3, 15), service=valid_service, notification_status=NOTIFICATION_CREATED)
    # notification created by inactive service
    create_ft_notification_status(date(2019, 3, 15), service=inactive_service)
    # notification created with test key
    create_ft_notification_status(date(2019, 3, 12), service=valid_service, key_type=KEY_TYPE_TEST)
    # notification created by research mode service
    create_ft_notification_status(date(2019, 3, 2), service=research_mode_service)
    # notification created by trial mode service
    create_ft_notification_status(date(2019, 3, 19), service=restricted_service)
    # notifications outside date range
    create_ft_notification_status(date(2019, 2, 28), service=valid_service)
    create_ft_notification_status(date(2019, 4, 1), service=valid_service)

    results = fetch_monthly_notification_statuses_per_service(date(2019, 3, 1), date(2019, 3, 31))
    assert len(results) == 0


def test_get_total_notifications_for_date_range(sample_service):
    template_sms = create_template(service=sample_service, template_type='sms', template_name='a')
    template_email = create_template(service=sample_service, template_type='email', template_name='b')
    template_letter = create_template(service=sample_service, template_type='letter', template_name='c')
    create_ft_notification_status(bst_date=date(2021, 2, 28),
                                  service=template_email.service,
                                  template=template_email,
                                  count=15)
    create_ft_notification_status(bst_date=date(2021, 2, 28),
                                  service=template_sms.service,
                                  template=template_sms,
                                  count=20)
    create_ft_notification_status(bst_date=date(2021, 2, 28),
                                  service=template_letter.service,
                                  template=template_letter,
                                  count=3)

    create_ft_notification_status(bst_date=date(2021, 3, 1),
                                  service=template_email.service,
                                  template=template_email,
                                  count=15)
    create_ft_notification_status(bst_date=date(2021, 3, 1),
                                  service=template_sms.service,
                                  template=template_sms,
                                  count=20)
    create_ft_notification_status(bst_date=date(2021, 3, 1),
                                  service=template_letter.service,
                                  template=template_letter,
                                  count=3)

    results = get_total_notifications_for_date_range(start_date=datetime(2021, 3, 1), end_date=datetime(2021, 3, 1))

    assert len(results) == 1
    assert results[0] == ("2021-03-01", 15, 20, 3)


@freeze_time('2022-03-31T18:00:00')
@pytest.mark.parametrize('created_at_utc,process_day,expected_count', [
    # Clocks change on the 27th of March 2022, so the query needs to look at the
    # time range 00:00 - 23:00 (UTC) thereafter.
    ('2022-03-27T00:30', date(2022, 3, 27), 1),  # 27/03 00:30 GMT
    ('2022-03-27T22:30', date(2022, 3, 27), 1),  # 27/03 23:30 BST
    ('2022-03-27T23:30', date(2022, 3, 27), 0),  # 28/03 00:30 BST
    ('2022-03-26T23:30', date(2022, 3, 26), 1),  # 26/03 23:30 GMT
])
def test_update_fact_notification_status_respects_gmt_bst(
    sample_template,
    sample_service,
    created_at_utc,
    process_day,
    expected_count,
):
    create_notification(template=sample_template, created_at=created_at_utc)
    update_fact_notification_status(process_day, SMS_TYPE, sample_service.id)

    assert FactNotificationStatus.query.filter_by(
        service_id=sample_service.id,
        bst_date=process_day
    ).count() == expected_count