from datetime import date, datetime, timedelta
from decimal import Decimal

import pytest
from freezegun import freeze_time

from app import db
from app.dao.fact_billing_dao import (
    delete_billing_data_for_service_for_day,
    fetch_billing_data_for_day,
    fetch_billing_totals_for_year,
    fetch_daily_sms_provider_volumes_for_platform,
    fetch_daily_volumes_for_platform,
    fetch_monthly_billing_for_year,
    fetch_sms_billing_for_all_services,
    fetch_sms_free_allowance_remainder_until_date,
    fetch_usage_year_for_organisation,
    fetch_volumes_by_service,
    get_rate,
    get_rates_for_billing,
    query_organisation_sms_usage_for_year,
)
from app.dao.organisation_dao import dao_add_service_to_organisation
from app.models import NOTIFICATION_STATUS_TYPES, FactBilling
from tests.app.db import (
    create_annual_billing,
    create_ft_billing,
    create_notification,
    create_notification_history,
    create_organisation,
    create_rate,
    create_service,
    create_service_data_retention,
    create_template,
    set_up_usage_data,
)


def set_up_yearly_data():
    service = create_service()
    sms_template = create_template(service=service, template_type="sms")
    email_template = create_template(service=service, template_type="email")

    # use different rates for adjacent financial years to make sure the query
    # doesn't accidentally bleed over into them
    for dt in (date(2015, 12, 31), date(2017, 1, 1)):
        create_ft_billing(local_date=dt, template=sms_template, rate=0.163)
        create_ft_billing(local_date=dt, template=email_template, rate=0, billable_unit=0)

    # a selection of dates that represent the extreme ends of the financial year
    # and some arbitrary dates in between
    for dt in (date(2016, 1, 1), date(2016, 1, 31), date(2016, 12, 6), date(2016, 12, 31)):
        create_ft_billing(local_date=dt, template=sms_template, rate=0.162)
        create_ft_billing(local_date=dt, template=email_template, rate=0, billable_unit=0)

    return service


def set_up_yearly_data_variable_rates():
    service = create_service()
    sms_template = create_template(service=service, template_type="sms")

    create_ft_billing(local_date='2018-05-16', template=sms_template, rate=0.162)
    create_ft_billing(local_date='2018-05-17', template=sms_template, rate_multiplier=2, rate=0.0150, billable_unit=2)
    create_ft_billing(local_date='2018-05-16', template=sms_template, rate_multiplier=2, rate=0.162, billable_unit=2)

    return service


def test_fetch_billing_data_for_today_includes_data_with_the_right_key_type(notify_db_session):
    service = create_service()
    template = create_template(service=service, template_type="email")
    for key_type in ['normal', 'test', 'team']:
        create_notification(template=template, status='delivered', key_type=key_type)

    today = datetime.utcnow()
    results = fetch_billing_data_for_day(today.date())
    assert len(results) == 1
    assert results[0].notifications_sent == 2


@pytest.mark.parametrize("notification_type", ["email", "sms"])
def test_fetch_billing_data_for_day_only_calls_query_for_permission_type(notify_db_session, notification_type):
    service = create_service(service_permissions=[notification_type])
    email_template = create_template(service=service, template_type="email")
    sms_template = create_template(service=service, template_type="sms")
    create_notification(template=email_template, status='delivered')
    create_notification(template=sms_template, status='delivered')
    today = datetime.utcnow()
    results = fetch_billing_data_for_day(process_day=today.date(), check_permissions=True)
    assert len(results) == 1


@pytest.mark.parametrize("notification_type", ["email", "sms"])
def test_fetch_billing_data_for_day_only_calls_query_for_all_channels(notify_db_session, notification_type):
    service = create_service(service_permissions=[notification_type])
    email_template = create_template(service=service, template_type="email")
    sms_template = create_template(service=service, template_type="sms")
    create_notification(template=email_template, status='delivered')
    create_notification(template=sms_template, status='delivered')
    today = datetime.utcnow()
    results = fetch_billing_data_for_day(process_day=today.date(), check_permissions=False)
    assert len(results) == 2


@freeze_time('2018-04-02 01:20:00')
def test_fetch_billing_data_for_today_includes_data_with_the_right_date(notify_db_session):
    process_day = datetime(2018, 4, 1, 13, 30, 0)
    service = create_service()
    template = create_template(service=service, template_type="email")
    create_notification(template=template, status='delivered', created_at=process_day)
    create_notification(template=template, status='delivered', created_at=datetime(2018, 4, 1, 4, 23, 23))

    create_notification(template=template, status='delivered', created_at=datetime(2018, 4, 1, 0, 23, 23))
    create_notification(template=template, status='sending', created_at=process_day + timedelta(days=1))

    day_under_test = process_day
    results = fetch_billing_data_for_day(day_under_test.date())
    assert len(results) == 1
    assert results[0].notifications_sent == 3


def test_fetch_billing_data_for_day_is_grouped_by_template_and_notification_type(notify_db_session):
    service = create_service()
    email_template = create_template(service=service, template_type="email")
    sms_template = create_template(service=service, template_type="sms")
    create_notification(template=email_template, status='delivered')
    create_notification(template=sms_template, status='delivered')

    today = datetime.utcnow()
    results = fetch_billing_data_for_day(today.date())
    assert len(results) == 2
    assert results[0].notifications_sent == 1
    assert results[1].notifications_sent == 1


def test_fetch_billing_data_for_day_is_grouped_by_service(notify_db_session):
    service_1 = create_service()
    service_2 = create_service(service_name='Service 2')
    email_template = create_template(service=service_1)
    sms_template = create_template(service=service_2)
    create_notification(template=email_template, status='delivered')
    create_notification(template=sms_template, status='delivered')

    today = datetime.utcnow()
    results = fetch_billing_data_for_day(today.date())
    assert len(results) == 2
    assert results[0].notifications_sent == 1
    assert results[1].notifications_sent == 1


def test_fetch_billing_data_for_day_is_grouped_by_provider(notify_db_session):
    service = create_service()
    template = create_template(service=service)
    create_notification(template=template, status='delivered', sent_by='sns')
    create_notification(template=template, status='delivered', sent_by='sns')

    today = datetime.utcnow()
    results = fetch_billing_data_for_day(today.date())
    assert len(results) == 1
    assert results[0].notifications_sent == 2
    # assert results[1].notifications_sent == 1


def test_fetch_billing_data_for_day_is_grouped_by_rate_mulitplier(notify_db_session):
    service = create_service()
    template = create_template(service=service)
    create_notification(template=template, status='delivered', rate_multiplier=1)
    create_notification(template=template, status='delivered', rate_multiplier=2)

    today = datetime.utcnow()
    results = fetch_billing_data_for_day(today.date())
    assert len(results) == 2
    assert results[0].notifications_sent == 1
    assert results[1].notifications_sent == 1


def test_fetch_billing_data_for_day_is_grouped_by_international(notify_db_session):
    service = create_service()
    sms_template = create_template(service=service)
    create_notification(template=sms_template, status='delivered', international=True)
    create_notification(template=sms_template, status='delivered', international=False)

    today = datetime.utcnow()
    results = fetch_billing_data_for_day(today.date())
    assert len(results) == 2
    assert all(result.notifications_sent == 1 for result in results)


def test_fetch_billing_data_for_day_is_grouped_by_notification_type(notify_db_session):
    service = create_service()
    sms_template = create_template(service=service, template_type='sms')
    email_template = create_template(service=service, template_type='email')
    create_notification(template=sms_template, status='delivered')
    create_notification(template=sms_template, status='delivered')
    create_notification(template=sms_template, status='delivered')
    create_notification(template=email_template, status='delivered')
    create_notification(template=email_template, status='delivered')

    today = datetime.utcnow()
    results = fetch_billing_data_for_day(today.date())
    assert len(results) == 2
    notification_types = [x.notification_type for x in results]
    assert len(notification_types) == 2


def test_fetch_billing_data_for_day_returns_empty_list(notify_db_session):
    today = datetime.utcnow()
    results = fetch_billing_data_for_day(today.date())
    assert results == []


def test_fetch_billing_data_for_day_uses_correct_table(notify_db_session):
    service = create_service()
    create_service_data_retention(service, notification_type='email', days_of_retention=3)
    sms_template = create_template(service=service, template_type='sms')
    email_template = create_template(service=service, template_type='email')

    five_days_ago = datetime.utcnow() - timedelta(days=5)
    create_notification(template=sms_template, status='delivered', created_at=five_days_ago)
    create_notification_history(template=email_template, status='delivered', created_at=five_days_ago)

    results = fetch_billing_data_for_day(process_day=five_days_ago.date(), service_id=service.id)
    assert len(results) == 2
    assert results[0].notification_type == 'sms'
    assert results[0].notifications_sent == 1
    assert results[1].notification_type == 'email'
    assert results[1].notifications_sent == 1


def test_fetch_billing_data_for_day_returns_list_for_given_service(notify_db_session):
    service = create_service()
    service_2 = create_service(service_name='Service 2')
    template = create_template(service=service)
    template_2 = create_template(service=service_2)
    create_notification(template=template, status='delivered')
    create_notification(template=template_2, status='delivered')

    today = datetime.utcnow()
    results = fetch_billing_data_for_day(process_day=today.date(), service_id=service.id)
    assert len(results) == 1
    assert results[0].service_id == service.id


def test_fetch_billing_data_for_day_bills_correctly_for_status(notify_db_session):
    service = create_service()
    sms_template = create_template(service=service, template_type='sms')
    email_template = create_template(service=service, template_type='email')
    for status in NOTIFICATION_STATUS_TYPES:
        create_notification(template=sms_template, status=status)
        create_notification(template=email_template, status=status)
    today = datetime.utcnow()
    results = fetch_billing_data_for_day(process_day=today.date(), service_id=service.id)

    sms_results = [x for x in results if x.notification_type == 'sms']
    email_results = [x for x in results if x.notification_type == 'email']
    # we expect as many rows as we check for notification types
    assert 6 == sms_results[0].notifications_sent
    assert 4 == email_results[0].notifications_sent


def test_get_rates_for_billing(notify_db_session):
    create_rate(start_date=datetime.utcnow(), value=12, notification_type='email')
    create_rate(start_date=datetime.utcnow(), value=22, notification_type='sms')
    create_rate(start_date=datetime.utcnow(), value=33, notification_type='email')
    rates = get_rates_for_billing()

    assert len(rates) == 3


@freeze_time('2017-06-01 12:00')
def test_get_rate(notify_db_session):
    create_rate(start_date=datetime(2017, 5, 30, 23, 0), value=1.2, notification_type='email')
    create_rate(start_date=datetime(2017, 5, 30, 23, 0), value=2.2, notification_type='sms')
    create_rate(start_date=datetime(2017, 5, 30, 23, 0), value=3.3, notification_type='email')

    rates = get_rates_for_billing()
    rate = get_rate(rates, notification_type='sms', date=date(2017, 6, 1))

    assert rate == 2.2


@pytest.mark.parametrize("date,expected_rate", [(datetime(2018, 9, 30), 1.2), (datetime(2018, 10, 1), 2.2)])
def test_get_rate_chooses_right_rate_depending_on_date(notify_db_session, date, expected_rate):
    create_rate(start_date=datetime(2016, 1, 1, 0, 0), value=1.2, notification_type='sms')
    create_rate(start_date=datetime(2018, 9, 30, 23, 0), value=2.2, notification_type='sms')

    rates = get_rates_for_billing()
    rate = get_rate(rates, "sms", date)
    assert rate == expected_rate


def test_fetch_monthly_billing_for_year(notify_db_session):
    service = set_up_yearly_data()
    create_annual_billing(service_id=service.id, free_sms_fragment_limit=1, financial_year_start=2016)
    results = fetch_monthly_billing_for_year(service.id, 2016)

    assert len(results) == 4  # 3 billed months for each type
    print(f"RESULTS {results}")

    assert str(results[0].month) == "2016-01-01"
    assert results[0].notification_type == 'email'
    assert results[0].notifications_sent == 2
    assert results[0].chargeable_units == 0
    assert results[0].rate == Decimal('0')
    assert results[0].cost == Decimal('0')
    assert results[0].free_allowance_used == 0
    assert results[0].charged_units == 0

    assert str(results[1].month) == "2016-01-01"
    assert results[1].notification_type == 'sms'
    assert results[1].notifications_sent == 2
    assert results[1].chargeable_units == 2
    assert results[1].rate == Decimal('0.162')
    # free allowance is 1
    assert results[1].cost == Decimal('0.162')
    assert results[1].free_allowance_used == 1
    assert results[1].charged_units == 1

    assert str(results[2].month) == "2016-12-01"


def test_fetch_monthly_billing_for_year_variable_rates(notify_db_session):
    service = set_up_yearly_data_variable_rates()
    create_annual_billing(service_id=service.id, free_sms_fragment_limit=6, financial_year_start=2018)
    results = fetch_monthly_billing_for_year(service.id, 2018)

    # Test data is only for the month of May
    assert len(results) == 2

    assert str(results[0].month) == "2018-05-01"
    assert results[0].notification_type == 'sms'
    assert results[0].notifications_sent == 1
    assert results[0].chargeable_units == 4
    assert results[0].rate == Decimal('0.015')
    # 1 free units on the 17th
    assert results[0].cost == Decimal('0.045')
    assert results[0].free_allowance_used == 1
    assert results[0].charged_units == 3

    assert str(results[1].month) == "2018-05-01"
    assert results[1].notification_type == 'sms'
    assert results[1].notifications_sent == 2
    assert results[1].chargeable_units == 5
    assert results[1].rate == Decimal('0.162')
    # 5 free units on the 16th
    assert results[1].cost == Decimal('0')
    assert results[1].free_allowance_used == 5
    assert results[1].charged_units == 0


@freeze_time('2018-08-01 13:30:00')
def test_fetch_monthly_billing_for_year_adds_data_for_today(notify_db_session):
    service = create_service()
    template = create_template(service=service, template_type="sms")

    create_rate(start_date=datetime.utcnow() - timedelta(days=1), value=0.158, notification_type='sms')
    create_annual_billing(service_id=service.id, free_sms_fragment_limit=1000, financial_year_start=2018)

    for i in range(1, 32):
        create_ft_billing(local_date='2018-07-{}'.format(i), template=template)

    create_notification(template=template, status='delivered')

    assert db.session.query(FactBilling.local_date).count() == 31
    results = fetch_monthly_billing_for_year(service_id=service.id, year=2018)

    assert db.session.query(FactBilling.local_date).count() == 32
    assert len(results) == 2


def test_fetch_billing_totals_for_year(notify_db_session):
    service = set_up_yearly_data()
    create_annual_billing(service_id=service.id, free_sms_fragment_limit=1000, financial_year_start=2016)
    results = fetch_billing_totals_for_year(service_id=service.id, year=2016)

    assert len(results) == 2
    assert results[0].notification_type == 'email'
    assert results[0].notifications_sent == 4
    assert results[0].chargeable_units == 0
    assert results[0].rate == Decimal('0')
    assert results[0].cost == Decimal('0')
    assert results[0].free_allowance_used == 0
    assert results[0].charged_units == 0

    assert results[1].notification_type == 'sms'
    assert results[1].notifications_sent == 4
    assert results[1].chargeable_units == 4
    assert results[1].rate == Decimal('0.162')
    assert results[1].cost == Decimal('0')
    assert results[1].free_allowance_used == 4
    assert results[1].charged_units == 0


def test_fetch_billing_totals_for_year_uses_current_annual_billing(notify_db_session):
    service = set_up_yearly_data()
    create_annual_billing(service_id=service.id, free_sms_fragment_limit=400, financial_year_start=2016)
    create_annual_billing(service_id=service.id, free_sms_fragment_limit=0, financial_year_start=2017)

    result = next(
        result for result in
        fetch_billing_totals_for_year(service_id=service.id, year=2016)
        if result.notification_type == 'sms'
    )

    assert result.chargeable_units == 4
    # No charge for 2016 because we have free sms fragments.
    # There would be a charge for 2017,
    # but we are only billing for 2016 so cost is zero
    assert result.cost == 0


def test_fetch_billing_totals_for_year_variable_rates(notify_db_session):
    service = set_up_yearly_data_variable_rates()
    create_annual_billing(service_id=service.id, free_sms_fragment_limit=6, financial_year_start=2018)
    results = fetch_billing_totals_for_year(service_id=service.id, year=2018)

    assert len(results) == 2

    assert results[0].notification_type == 'sms'
    assert results[0].notifications_sent == 1
    assert results[0].chargeable_units == 4
    assert results[0].rate == Decimal('0.015')
    # 1 free unit on the 17th
    assert results[0].cost == Decimal('0.045')
    assert results[0].free_allowance_used == 1
    assert results[0].charged_units == 3

    assert results[1].notification_type == 'sms'
    assert results[1].notifications_sent == 2
    assert results[1].chargeable_units == 5
    assert results[1].rate == Decimal('0.162')
    # 5 free units on the 16th
    assert results[1].cost == Decimal('0')
    assert results[1].free_allowance_used == 5
    assert results[1].charged_units == 0


def test_delete_billing_data(notify_db_session):
    service_1 = create_service(service_name='1')
    service_2 = create_service(service_name='2')
    sms_template = create_template(service_1, 'sms')
    email_template = create_template(service_1, 'email')
    other_service_template = create_template(service_2, 'sms')

    existing_rows_to_delete = [  # noqa
        create_ft_billing('2018-01-01', sms_template, billable_unit=1),
        create_ft_billing('2018-01-01', email_template, billable_unit=2)
    ]
    other_day = create_ft_billing('2018-01-02', sms_template, billable_unit=3)
    other_service = create_ft_billing('2018-01-01', other_service_template, billable_unit=4)

    delete_billing_data_for_service_for_day('2018-01-01', service_1.id)

    current_rows = FactBilling.query.all()
    assert sorted(x.billable_units for x in current_rows) == sorted(
        [other_day.billable_units, other_service.billable_units]
    )


def test_fetch_sms_free_allowance_remainder_until_date_with_two_services(notify_db_session):
    service = create_service(service_name='has free allowance')
    template = create_template(service=service)
    org = create_organisation(name="Org for {}".format(service.name))
    dao_add_service_to_organisation(service=service, organisation_id=org.id)
    create_annual_billing(service_id=service.id, free_sms_fragment_limit=10, financial_year_start=2016)
    create_ft_billing(template=template, local_date=datetime(2016, 4, 20), billable_unit=2, rate=0.11)
    create_ft_billing(template=template, local_date=datetime(2016, 5, 20), billable_unit=3, rate=0.11)

    service_2 = create_service(service_name='used free allowance')
    template_2 = create_template(service=service_2)
    org_2 = create_organisation(name="Org for {}".format(service_2.name))
    dao_add_service_to_organisation(service=service_2, organisation_id=org_2.id)
    create_annual_billing(service_id=service_2.id, free_sms_fragment_limit=20, financial_year_start=2016)
    create_ft_billing(template=template_2, local_date=datetime(2016, 4, 20), billable_unit=12, rate=0.11)
    create_ft_billing(template=template_2, local_date=datetime(2016, 4, 22), billable_unit=10, rate=0.11)
    create_ft_billing(template=template_2, local_date=datetime(2016, 5, 20), billable_unit=3, rate=0.11)

    results = fetch_sms_free_allowance_remainder_until_date(datetime(2016, 5, 1)).all()
    assert len(results) == 2
    service_result = [row for row in results if row[0] == service.id]
    assert service_result[0] == (service.id, 10, 2, 8)
    service_2_result = [row for row in results if row[0] == service_2.id]
    assert service_2_result[0] == (service_2.id, 20, 22, 0)


def test_fetch_sms_billing_for_all_services_for_first_quarter(notify_db_session):
    # This test is useful because the inner query resultset is empty.
    service = create_service(service_name='a - has free allowance')
    template = create_template(service=service)
    org = create_organisation(name="Org for {}".format(service.name))
    dao_add_service_to_organisation(service=service, organisation_id=org.id)
    create_annual_billing(service_id=service.id, free_sms_fragment_limit=25000, financial_year_start=2019)
    create_ft_billing(template=template, local_date=datetime(2019, 4, 20, 12), billable_unit=44, rate=0.11)
    results = fetch_sms_billing_for_all_services(datetime(2019, 4, 1, 12), datetime(2019, 5, 30, 12))
    assert len(results) == 1
    assert results[0] == (org.name, org.id, service.name, service.id, 25000, Decimal('0.11'), 24956, 44, 0,
                          Decimal('0'))


def test_fetch_sms_billing_for_all_services_with_remainder(notify_db_session):
    service_1 = create_service(service_name='a - has free allowance')
    template = create_template(service=service_1)
    org = create_organisation(name="Org for {}".format(service_1.name))
    dao_add_service_to_organisation(service=service_1, organisation_id=org.id)
    create_annual_billing(service_id=service_1.id, free_sms_fragment_limit=10, financial_year_start=2019)
    create_ft_billing(template=template, local_date=datetime(2019, 4, 20), billable_unit=2, rate=0.11)
    create_ft_billing(template=template, local_date=datetime(2019, 5, 20), billable_unit=2, rate=0.11)
    create_ft_billing(template=template, local_date=datetime(2019, 5, 22), billable_unit=1, rate=0.11)

    service_2 = create_service(service_name='b - used free allowance')
    template_2 = create_template(service=service_2)
    org_2 = create_organisation(name="Org for {}".format(service_2.name))
    dao_add_service_to_organisation(service=service_2, organisation_id=org_2.id)
    create_annual_billing(service_id=service_2.id, free_sms_fragment_limit=10, financial_year_start=2019)
    create_ft_billing(template=template_2, local_date=datetime(2019, 4, 20), billable_unit=12, rate=0.11)
    create_ft_billing(template=template_2, local_date=datetime(2019, 5, 20), billable_unit=3, rate=0.11)

    service_3 = create_service(service_name='c - partial allowance')
    template_3 = create_template(service=service_3)
    org_3 = create_organisation(name="Org for {}".format(service_3.name))
    dao_add_service_to_organisation(service=service_3, organisation_id=org_3.id)
    create_annual_billing(service_id=service_3.id, free_sms_fragment_limit=10, financial_year_start=2019)
    create_ft_billing(template=template_3, local_date=datetime(2019, 4, 20), billable_unit=5, rate=0.11)
    create_ft_billing(template=template_3, local_date=datetime(2019, 5, 20), billable_unit=7, rate=0.11)

    service_4 = create_service(service_name='d - email only')
    email_template = create_template(service=service_4, template_type='email')
    org_4 = create_organisation(name="Org for {}".format(service_4.name))
    dao_add_service_to_organisation(service=service_4, organisation_id=org_4.id)
    create_annual_billing(service_id=service_4.id, free_sms_fragment_limit=10, financial_year_start=2019)
    create_ft_billing(template=email_template, local_date=datetime(2019, 5, 22), notifications_sent=5,
                      billable_unit=0, rate=0)

    results = fetch_sms_billing_for_all_services(datetime(2019, 5, 1), datetime(2019, 5, 31))
    assert len(results) == 3

    expected_results = [
        # sms_remainder is 5, because "service_1" has 5 sms_billing_units. 2 of them for a period before
        # the requested report's start date.
        {
            "organisation_name": org.name, "organisation_id": org.id, "service_name": service_1.name,
            "service_id": service_1.id, "free_sms_fragment_limit": 10, "sms_rate": Decimal('0.11'), "sms_remainder": 5,
            "sms_billable_units": 3, "chargeable_billable_sms": 0, "sms_cost": Decimal('0.00')
        },
        # sms remainder is 0, because this service sent SMS worth 15 billable units, 12 of which were sent
        # before requested report's start date
        {
            "organisation_name": org_2.name, "organisation_id": org_2.id, "service_name": service_2.name,
            "service_id": service_2.id, "free_sms_fragment_limit": 10, "sms_rate": Decimal('0.11'), "sms_remainder": 0,
            "sms_billable_units": 3, "chargeable_billable_sms": 3, "sms_cost": Decimal('0.33')
        },
        # sms remainder is 0, because this service sent SMS worth 12 billable units, 5 of which were sent
        # before requested report's start date
        {
            "organisation_name": org_3.name, "organisation_id": org_3.id, "service_name": service_3.name,
            "service_id": service_3.id, "free_sms_fragment_limit": 10, "sms_rate": Decimal('0.11'), "sms_remainder": 0,
            "sms_billable_units": 7, "chargeable_billable_sms": 2, "sms_cost": Decimal('0.22')
        },
    ]

    assert [dict(result) for result in results] == expected_results


def test_fetch_sms_billing_for_all_services_without_an_organisation_appears(notify_db_session):
    fixtures = set_up_usage_data(datetime(2019, 5, 1))
    results = fetch_sms_billing_for_all_services(datetime(2019, 5, 1), datetime(2019, 5, 31))

    assert len(results) == 3
    expected_results = [
        # sms_remainder is 5, because service_1_sms_and_letter has 5 sms_billing_units. 2 of them for a period before
        # the requested report's start date.
        {
            "organisation_name": fixtures["org_1"].name, "organisation_id": fixtures["org_1"].id,
            "service_name": fixtures["service_1_sms_and_letter"].name,
            "service_id": fixtures["service_1_sms_and_letter"].id,
            "free_sms_fragment_limit": 10, "sms_rate": Decimal('0.11'), "sms_remainder": 5,
            "sms_billable_units": 3, "chargeable_billable_sms": 0, "sms_cost": Decimal('0.00')
        },
        # sms remainder is 0, because this service sent SMS worth 15 billable units, 12 of which were sent
        # before requested report's start date
        {
            "organisation_name": None, "organisation_id": None,
            "service_name": fixtures["service_with_sms_without_org"].name,
            "service_id": fixtures["service_with_sms_without_org"].id, "free_sms_fragment_limit": 10,
            "sms_rate": Decimal('0.11'), "sms_remainder": 0,
            "sms_billable_units": 3, "chargeable_billable_sms": 3, "sms_cost": Decimal('0.33')
        },
        {
            "organisation_name": None, "organisation_id": None,
            "service_name": fixtures["service_with_sms_within_allowance"].name,
            "service_id": fixtures["service_with_sms_within_allowance"].id, "free_sms_fragment_limit": 10,
            "sms_rate": Decimal('0.11'), "sms_remainder": 8,
            "sms_billable_units": 2, "chargeable_billable_sms": 0, "sms_cost": Decimal('0.00')
        },
    ]

    assert [dict(result) for result in results] == expected_results


@freeze_time('2019-06-01 13:30')
def test_fetch_usage_year_for_organisation(notify_db_session):
    fixtures = set_up_usage_data(datetime(2019, 5, 1))
    service_with_emails_for_org = create_service(service_name='Service with emails for org')
    create_annual_billing(service_with_emails_for_org.id, free_sms_fragment_limit=0, financial_year_start=2019)
    dao_add_service_to_organisation(
        service=service_with_emails_for_org,
        organisation_id=fixtures["org_1"].id
    )
    template = create_template(service=service_with_emails_for_org, template_type='email')
    create_ft_billing(local_date=datetime(2019, 5, 1),
                      template=template,
                      notifications_sent=1100)
    results = fetch_usage_year_for_organisation(fixtures["org_1"].id, 2019)

    assert len(results) == 3
    first_row = results[str(fixtures["service_1_sms_and_letter"].id)]
    assert first_row['service_id'] == fixtures["service_1_sms_and_letter"].id
    assert first_row['service_name'] == fixtures["service_1_sms_and_letter"].name
    assert first_row['free_sms_limit'] == 10
    assert first_row['sms_remainder'] == 5  # because there are 5 billable units
    assert first_row['chargeable_billable_sms'] == 0
    assert first_row['sms_cost'] == 0.0
    assert first_row['emails_sent'] == 0

    second_row = results[str(service_with_emails_for_org.id)]
    assert second_row['service_id'] == service_with_emails_for_org.id
    assert second_row['service_name'] == service_with_emails_for_org.name
    assert second_row['free_sms_limit'] == 0
    assert second_row['sms_remainder'] == 0
    assert second_row['chargeable_billable_sms'] == 0
    assert second_row['sms_cost'] == 0
    assert second_row['emails_sent'] == 1100

    third_row = results[str(fixtures["service_with_out_ft_billing_this_year"].id)]
    assert third_row['service_id'] == fixtures["service_with_out_ft_billing_this_year"].id
    assert third_row['service_name'] == fixtures["service_with_out_ft_billing_this_year"].name
    assert third_row['free_sms_limit'] == 10
    assert third_row['sms_remainder'] == 10
    assert third_row['chargeable_billable_sms'] == 0
    assert third_row['sms_cost'] == 0
    assert third_row['emails_sent'] == 0


def test_fetch_usage_year_for_organisation_populates_ft_billing_for_today(notify_db_session):
    create_rate(start_date=datetime.utcnow() - timedelta(days=1), value=0.65, notification_type='sms')
    new_org = create_organisation(name='New organisation')
    service = create_service()
    template = create_template(service=service)
    dao_add_service_to_organisation(service=service, organisation_id=new_org.id)
    current_year = datetime.utcnow().year
    create_annual_billing(service_id=service.id, free_sms_fragment_limit=10, financial_year_start=current_year)

    assert FactBilling.query.count() == 0

    create_notification(template=template, status='delivered')

    results = fetch_usage_year_for_organisation(organisation_id=new_org.id, year=current_year)
    assert len(results) == 1
    assert FactBilling.query.count() == 1


@freeze_time('2022-05-01 13:30')
def test_fetch_usage_year_for_organisation_calculates_cost_from_multiple_rates(notify_db_session):
    old_rate_date = date(2022, 4, 29)
    new_rate_date = date(2022, 5, 1)
    current_year = datetime.utcnow().year

    org = create_organisation(name='Organisation 1')

    service_1 = create_service(restricted=False, service_name="Service 1")
    dao_add_service_to_organisation(service=service_1, organisation_id=org.id)
    sms_template_1 = create_template(service=service_1)
    create_ft_billing(
        local_date=old_rate_date, template=sms_template_1, rate=2,
        billable_unit=4, notifications_sent=4
    )
    create_ft_billing(
        local_date=new_rate_date, template=sms_template_1, rate=3,
        billable_unit=2, notifications_sent=2
    )
    create_annual_billing(service_id=service_1.id, free_sms_fragment_limit=3, financial_year_start=current_year)

    results = fetch_usage_year_for_organisation(organisation_id=org.id, year=current_year)

    assert len(results) == 1
    assert results[str(service_1.id)]['free_sms_limit'] == 3
    assert results[str(service_1.id)]['sms_remainder'] == 0
    assert results[str(service_1.id)]['sms_billable_units'] == 6
    assert results[str(service_1.id)]['chargeable_billable_sms'] == 3
    assert results[str(service_1.id)]['sms_cost'] == 8.0


@freeze_time('2022-05-01 13:30')
def test_fetch_usage_year_for_organisation_when_no_usage(notify_db_session):
    current_year = datetime.utcnow().year

    org = create_organisation(name='Organisation 1')

    service_1 = create_service(restricted=False, service_name="Service 1")
    dao_add_service_to_organisation(service=service_1, organisation_id=org.id)
    create_annual_billing(service_id=service_1.id, free_sms_fragment_limit=3, financial_year_start=current_year)

    results = fetch_usage_year_for_organisation(organisation_id=org.id, year=current_year)

    assert len(results) == 1
    assert results[str(service_1.id)]['free_sms_limit'] == 3
    assert results[str(service_1.id)]['sms_remainder'] == 3
    assert results[str(service_1.id)]['sms_billable_units'] == 0
    assert results[str(service_1.id)]['chargeable_billable_sms'] == 0
    assert results[str(service_1.id)]['sms_cost'] == 0.0


@freeze_time('2022-05-01 13:30')
def test_fetch_usage_year_for_organisation_only_queries_present_year(notify_db_session):
    current_year = datetime.utcnow().year
    last_year = current_year - 1
    date_two_years_ago = date(2021, 3, 31)
    date_in_last_financial_year = date(2022, 3, 31)
    date_in_this_year = datetime.utcnow().date()

    org = create_organisation(name='Organisation 1')

    service_1 = create_service(restricted=False, service_name="Service 1")
    dao_add_service_to_organisation(service=service_1, organisation_id=org.id)
    sms_template_1 = create_template(service=service_1)

    create_ft_billing(
        local_date=date_two_years_ago, template=sms_template_1, rate=1,
        billable_unit=2, notifications_sent=2
    )
    create_ft_billing(
        local_date=date_in_last_financial_year, template=sms_template_1, rate=1,
        billable_unit=4, notifications_sent=4
    )
    create_ft_billing(
        local_date=date_in_this_year, template=sms_template_1, rate=1,
        billable_unit=8, notifications_sent=8
    )
    create_annual_billing(service_id=service_1.id, free_sms_fragment_limit=4, financial_year_start=last_year - 1)
    create_annual_billing(service_id=service_1.id, free_sms_fragment_limit=0, financial_year_start=last_year)
    create_annual_billing(service_id=service_1.id, free_sms_fragment_limit=8, financial_year_start=current_year)

    results = fetch_usage_year_for_organisation(organisation_id=org.id, year=last_year)

    assert len(results) == 1
    assert results[str(service_1.id)]['sms_billable_units'] == 2
    assert results[str(service_1.id)]['chargeable_billable_sms'] == 2
    assert results[str(service_1.id)]['sms_cost'] == 2.0


@freeze_time('2020-02-27 13:30')
def test_fetch_usage_year_for_organisation_only_returns_data_for_live_services(notify_db_session):
    org = create_organisation(name='Organisation without live services')
    live_service = create_service(restricted=False)
    sms_template = create_template(service=live_service)
    trial_service = create_service(restricted=True, service_name='trial_service')
    email_template = create_template(service=trial_service, template_type='email')
    trial_sms_template = create_template(service=trial_service, template_type='sms')
    dao_add_service_to_organisation(service=live_service, organisation_id=org.id)
    dao_add_service_to_organisation(service=trial_service, organisation_id=org.id)
    create_ft_billing(local_date=datetime.utcnow().date(), template=sms_template, rate=0.0158,
                      billable_unit=19, notifications_sent=19)
    create_ft_billing(local_date=datetime.utcnow().date(), template=email_template, billable_unit=0,
                      notifications_sent=100)
    create_ft_billing(local_date=datetime.utcnow().date(), template=trial_sms_template, billable_unit=200, rate=0.0158,
                      notifications_sent=100)
    create_annual_billing(service_id=live_service.id, free_sms_fragment_limit=0, financial_year_start=2020)
    create_annual_billing(service_id=trial_service.id, free_sms_fragment_limit=0, financial_year_start=2020)

    results = fetch_usage_year_for_organisation(organisation_id=org.id, year=2020)

    assert len(results) == 1
    assert results[str(live_service.id)]['sms_billable_units'] == 19
    assert results[str(live_service.id)]['emails_sent'] == 0


@freeze_time('2022-04-27 13:30')
def test_query_organisation_sms_usage_for_year_handles_multiple_services(notify_db_session):
    today = datetime.utcnow().date()
    yesterday = datetime.utcnow().date() - timedelta(days=1)
    current_year = datetime.utcnow().year

    org = create_organisation(name='Organisation 1')

    service_1 = create_service(restricted=False, service_name="Service 1")
    dao_add_service_to_organisation(service=service_1, organisation_id=org.id)
    sms_template_1 = create_template(service=service_1)
    create_ft_billing(
        local_date=yesterday, template=sms_template_1, rate=1,
        billable_unit=4, notifications_sent=4
    )
    create_ft_billing(
        local_date=today, template=sms_template_1, rate=1,
        billable_unit=2, notifications_sent=2
    )
    create_annual_billing(service_id=service_1.id, free_sms_fragment_limit=5, financial_year_start=current_year)

    service_2 = create_service(restricted=False, service_name="Service 2")
    dao_add_service_to_organisation(service=service_2, organisation_id=org.id)
    sms_template_2 = create_template(service=service_2)
    create_ft_billing(
        local_date=yesterday, template=sms_template_2, rate=1,
        billable_unit=16, notifications_sent=16
    )
    create_ft_billing(
        local_date=today, template=sms_template_2, rate=1,
        billable_unit=8, notifications_sent=8
    )
    create_annual_billing(service_id=service_2.id, free_sms_fragment_limit=10, financial_year_start=current_year)

    # ----------

    result = query_organisation_sms_usage_for_year(org.id, 2022).all()

    service_1_rows = [row for row in result if row.service_id == service_1.id]
    service_2_rows = [row for row in result if row.service_id == service_2.id]

    assert len(service_1_rows) == 2
    assert len(service_2_rows) == 2

    # service 1 has allowance of 5
    # four fragments in total, all are used
    assert service_1_rows[0]['local_date'] == date(2022, 4, 26)
    assert service_1_rows[0]['chargeable_units'] == 4
    assert service_1_rows[0]['charged_units'] == 0
    # two in total - one is free, one is charged
    assert service_1_rows[1]['local_date'] == date(2022, 4, 27)
    assert service_1_rows[1]['chargeable_units'] == 2
    assert service_1_rows[1]['charged_units'] == 1

    # service 2 has allowance of 10
    # sixteen fragments total, allowance is used and six are charged
    assert service_2_rows[0]['local_date'] == date(2022, 4, 26)
    assert service_2_rows[0]['chargeable_units'] == 16
    assert service_2_rows[0]['charged_units'] == 6
    # eight fragments total, all are charged
    assert service_2_rows[1]['local_date'] == date(2022, 4, 27)
    assert service_2_rows[1]['chargeable_units'] == 8
    assert service_2_rows[1]['charged_units'] == 8

    # assert total costs are accurate
    assert float(sum(row.cost for row in service_1_rows)) == 1  # rows with 2 and 4, allowance of 5
    assert float(sum(row.cost for row in service_2_rows)) == 14  # rows with 8 and 16, allowance of 10


@freeze_time('2022-05-01 13:30')
def test_query_organisation_sms_usage_for_year_handles_multiple_rates(notify_db_session):
    old_rate_date = date(2022, 4, 29)
    new_rate_date = date(2022, 5, 1)
    current_year = datetime.utcnow().year

    org = create_organisation(name='Organisation 1')

    service_1 = create_service(restricted=False, service_name="Service 1")
    dao_add_service_to_organisation(service=service_1, organisation_id=org.id)
    sms_template_1 = create_template(service=service_1)
    create_ft_billing(
        local_date=old_rate_date, template=sms_template_1, rate=2,
        billable_unit=4, notifications_sent=4
    )
    create_ft_billing(
        local_date=new_rate_date, template=sms_template_1, rate=3,
        billable_unit=2, notifications_sent=2
    )
    create_annual_billing(service_id=service_1.id, free_sms_fragment_limit=3, financial_year_start=current_year)

    result = query_organisation_sms_usage_for_year(org.id, 2022).all()

    # al lthe free allowance is used on the first day
    assert result[0]['local_date'] == date(2022, 4, 29)
    assert result[0]['charged_units'] == 1
    assert result[0]['cost'] == 2

    assert result[1]['local_date'] == date(2022, 5, 1)
    assert result[1]['charged_units'] == 2
    assert result[1]['cost'] == 6


def test_fetch_daily_volumes_for_platform(
        notify_db_session, sample_template, sample_email_template
):
    create_ft_billing(local_date='2022-02-03', template=sample_template,
                      notifications_sent=10, billable_unit=10)
    create_ft_billing(local_date='2022-02-03', template=sample_template,
                      notifications_sent=10, billable_unit=30, international=True)
    create_ft_billing(local_date='2022-02-03', template=sample_email_template, notifications_sent=10)

    create_ft_billing(local_date='2022-02-04', template=sample_template,
                      notifications_sent=20, billable_unit=40)
    create_ft_billing(local_date='2022-02-04', template=sample_template,
                      notifications_sent=10, billable_unit=20, rate_multiplier=3)
    create_ft_billing(local_date='2022-02-04', template=sample_email_template, notifications_sent=50)

    results = fetch_daily_volumes_for_platform(start_date='2022-02-03', end_date='2022-02-04')

    assert len(results) == 2
    assert results[0].local_date == '2022-02-03'
    assert results[0].sms_totals == 20
    assert results[0].sms_fragment_totals == 40
    assert results[0].sms_chargeable_units == 40
    assert results[0].email_totals == 10

    assert results[1].local_date == '2022-02-04'
    assert results[1].sms_totals == 30
    assert results[1].sms_fragment_totals == 60
    assert results[1].sms_chargeable_units == 100
    assert results[1].email_totals == 50


def test_fetch_daily_sms_provider_volumes_for_platform_groups_values_by_provider(
    notify_db_session,
):
    services = [
        create_service(service_name='a'),
        create_service(service_name='b')
    ]
    templates = [
        create_template(services[0]),
        create_template(services[1])
    ]

    create_ft_billing('2022-02-01', templates[0], provider='foo', notifications_sent=1, billable_unit=2)
    create_ft_billing('2022-02-01', templates[1], provider='foo', notifications_sent=4, billable_unit=8)

    create_ft_billing('2022-02-01', templates[0], provider='bar', notifications_sent=16, billable_unit=32)
    create_ft_billing('2022-02-01', templates[1], provider='bar', notifications_sent=64, billable_unit=128)

    results = fetch_daily_sms_provider_volumes_for_platform(start_date='2022-02-01', end_date='2022-02-01')

    assert len(results) == 2
    assert results[0].provider == 'bar'
    assert results[0].sms_totals == 80
    assert results[0].sms_fragment_totals == 160

    assert results[1].provider == 'foo'
    assert results[1].sms_totals == 5
    assert results[1].sms_fragment_totals == 10


def test_fetch_daily_sms_provider_volumes_for_platform_for_platform_calculates_chargeable_units_and_costs(
    sample_template,
):
    create_ft_billing('2022-02-01', sample_template, rate_multiplier=3, rate=1.5, notifications_sent=1, billable_unit=2)

    results = fetch_daily_sms_provider_volumes_for_platform(start_date='2022-02-01', end_date='2022-02-01')

    assert len(results) == 1
    assert results[0].sms_totals == 1
    assert results[0].sms_fragment_totals == 2
    assert results[0].sms_chargeable_units == 6
    assert results[0].sms_cost == 9


def test_fetch_daily_sms_provider_volumes_for_platform_for_platform_searches_dates_inclusively(sample_template):
    # too early
    create_ft_billing('2022-02-02', sample_template)

    # just right
    create_ft_billing('2022-02-03', sample_template)
    create_ft_billing('2022-02-04', sample_template)
    create_ft_billing('2022-02-05', sample_template)

    # too late
    create_ft_billing('2022-02-06', sample_template)

    results = fetch_daily_sms_provider_volumes_for_platform(start_date='2022-02-03', end_date='2022-02-05')

    assert len(results) == 3
    assert results[0].local_date == date(2022, 2, 3)
    assert results[-1].local_date == date(2022, 2, 5)


def test_fetch_daily_sms_provider_volumes_for_platform_for_platform_only_returns_sms(
    sample_template,
    sample_email_template,
):
    create_ft_billing('2022-02-01', sample_template, notifications_sent=1)
    create_ft_billing('2022-02-01', sample_email_template, notifications_sent=2)

    results = fetch_daily_sms_provider_volumes_for_platform(start_date='2022-02-01', end_date='2022-02-01')

    assert len(results) == 1
    assert results[0].sms_totals == 1


def test_fetch_volumes_by_service(notify_db_session):
    set_up_usage_data(datetime(2022, 2, 1))

    results = fetch_volumes_by_service(start_date=datetime(2022, 2, 1), end_date=datetime(2022, 2, 28))

    # since we are using a pre-set up fixture, we only care about some of the results
    assert len(results) == 5
    assert results[0].service_name == 'a - with sms and letter'
    assert results[0].organisation_name == 'Org for a - with sms and letter'
    assert results[0].free_allowance == 10
    assert results[0].sms_notifications == 2
    assert results[0].sms_chargeable_units == 3
    assert results[0].email_totals == 0

    assert results[1].service_name == 'f - without ft_billing'
    assert results[1].organisation_name == 'Org for a - with sms and letter'
    assert results[1].free_allowance == 10
    assert results[1].sms_notifications == 0
    assert results[1].sms_chargeable_units == 0
    assert results[1].email_totals == 0

    assert results[3].service_name == 'b - chargeable sms'
    assert not results[3].organisation_name
    assert results[3].free_allowance == 10
    assert results[3].sms_notifications == 2
    assert results[3].sms_chargeable_units == 3
    assert results[3].email_totals == 0

    assert results[4].service_name == 'e - sms within allowance'
    assert not results[4].organisation_name
    assert results[4].free_allowance == 10
    assert results[4].sms_notifications == 1
    assert results[4].sms_chargeable_units == 2
    assert results[4].email_totals == 0
