import uuid
from datetime import date, datetime

import pytest
from freezegun import freeze_time

from app.constants import (
    EMAIL_TYPE,
    KEY_TYPE_NORMAL,
    KEY_TYPE_TEAM,
    KEY_TYPE_TEST,
    LETTER_TYPE,
    PRECOMPILED_TEMPLATE_NAME,
    SMS_TYPE,
)
from tests.app.db import (
    create_ft_notification_status,
    create_notification,
    create_service,
    create_template,
)


@freeze_time("2017-11-11 02:00")
def test_get_template_usage_by_month_returns_correct_data(admin_request, sample_template):
    create_ft_notification_status(bst_date=date(2017, 4, 2), template=sample_template, count=3)
    create_notification(sample_template, created_at=datetime.utcnow())

    resp_json = admin_request.get(
        "service.get_monthly_template_usage", service_id=sample_template.service_id, year=2017
    )
    resp_json = resp_json["stats"]

    assert len(resp_json) == 2

    assert resp_json[0]["template_id"] == str(sample_template.id)
    assert resp_json[0]["name"] == sample_template.name
    assert resp_json[0]["type"] == sample_template.template_type
    assert resp_json[0]["month"] == 4
    assert resp_json[0]["year"] == 2017
    assert resp_json[0]["count"] == 3

    assert resp_json[1]["template_id"] == str(sample_template.id)
    assert resp_json[1]["name"] == sample_template.name
    assert resp_json[1]["type"] == sample_template.template_type
    assert resp_json[1]["month"] == 11
    assert resp_json[1]["year"] == 2017
    assert resp_json[1]["count"] == 1


@freeze_time("2017-11-11 02:00")
def test_get_template_usage_by_month_returns_two_templates(admin_request, sample_template, sample_service):
    template_one = create_template(
        sample_service, template_type=LETTER_TYPE, template_name=PRECOMPILED_TEMPLATE_NAME, hidden=True
    )
    create_ft_notification_status(bst_date=datetime(2017, 4, 1), template=template_one, count=1)
    create_ft_notification_status(bst_date=datetime(2017, 4, 1), template=sample_template, count=3)
    create_notification(sample_template, created_at=datetime.utcnow())

    resp_json = admin_request.get(
        "service.get_monthly_template_usage", service_id=sample_template.service_id, year=2017
    )

    resp_json = sorted(resp_json["stats"], key=lambda k: (k["year"], k["month"], k["count"]))
    assert len(resp_json) == 3

    assert resp_json[0]["template_id"] == str(template_one.id)
    assert resp_json[0]["name"] == template_one.name
    assert resp_json[0]["type"] == template_one.template_type
    assert resp_json[0]["month"] == 4
    assert resp_json[0]["year"] == 2017
    assert resp_json[0]["count"] == 1
    assert resp_json[0]["is_precompiled_letter"] is True

    assert resp_json[1]["template_id"] == str(sample_template.id)
    assert resp_json[1]["name"] == sample_template.name
    assert resp_json[1]["type"] == sample_template.template_type
    assert resp_json[1]["month"] == 4
    assert resp_json[1]["year"] == 2017
    assert resp_json[1]["count"] == 3
    assert resp_json[1]["is_precompiled_letter"] is False

    assert resp_json[2]["template_id"] == str(sample_template.id)
    assert resp_json[2]["name"] == sample_template.name
    assert resp_json[2]["type"] == sample_template.template_type
    assert resp_json[2]["month"] == 11
    assert resp_json[2]["year"] == 2017
    assert resp_json[2]["count"] == 1
    assert resp_json[2]["is_precompiled_letter"] is False


@pytest.mark.parametrize(
    "today_only, stats",
    [(False, {"requested": 2, "delivered": 1, "failed": 0}), (True, {"requested": 1, "delivered": 0, "failed": 0})],
    ids=["seven_days", "today"],
)
def test_get_service_notification_statistics(admin_request, sample_service, sample_template, today_only, stats):
    create_ft_notification_status(date(2000, 1, 1), "sms", sample_service, count=1)
    with freeze_time("2000-01-02T12:00:00"):
        create_notification(sample_template, status="created")
        resp = admin_request.get(
            "service.get_service_notification_statistics", service_id=sample_template.service_id, today_only=today_only
        )

    assert set(resp["data"].keys()) == {SMS_TYPE, EMAIL_TYPE, LETTER_TYPE}
    assert resp["data"][SMS_TYPE] == stats


def test_get_service_notification_statistics_with_unknown_service(admin_request):
    resp = admin_request.get("service.get_service_notification_statistics", service_id=uuid.uuid4())

    assert resp["data"] == {
        SMS_TYPE: {"requested": 0, "delivered": 0, "failed": 0},
        EMAIL_TYPE: {"requested": 0, "delivered": 0, "failed": 0},
        LETTER_TYPE: {"requested": 0, "delivered": 0, "failed": 0},
    }


@pytest.mark.parametrize(
    "kwargs, expected_json",
    [
        ({"year": "baz"}, {"message": "Year must be a number", "result": "error"}),
        ({}, {"message": "Year must be a number", "result": "error"}),
    ],
)
def test_get_monthly_notification_stats_returns_errors(admin_request, sample_service, kwargs, expected_json):
    response = admin_request.get(
        "service.get_monthly_notification_stats", service_id=sample_service.id, _expected_status=400, **kwargs
    )
    assert response == expected_json


def test_get_monthly_notification_stats_returns_404_if_no_service(admin_request):
    response = admin_request.get(
        "service.get_monthly_notification_stats",
        service_id=uuid.uuid4(),
        _expected_status=404,
    )
    assert response == {"message": "No result found", "result": "error"}


def test_get_monthly_notification_stats_returns_empty_stats_with_correct_dates(admin_request, sample_service):
    response = admin_request.get("service.get_monthly_notification_stats", service_id=sample_service.id, year=2016)
    assert len(response["data"]) == 12

    keys = [
        "2016-04",
        "2016-05",
        "2016-06",
        "2016-07",
        "2016-08",
        "2016-09",
        "2016-10",
        "2016-11",
        "2016-12",
        "2017-01",
        "2017-02",
        "2017-03",
    ]
    assert sorted(response["data"].keys()) == keys
    for val in response["data"].values():
        assert val == {"sms": {}, "email": {}, "letter": {}}


def test_get_monthly_notification_stats_returns_stats(admin_request, sample_service):
    sms_t1 = create_template(sample_service)
    sms_t2 = create_template(sample_service)
    email_template = create_template(sample_service, template_type=EMAIL_TYPE)

    create_ft_notification_status(datetime(2016, 6, 1), template=sms_t1)
    create_ft_notification_status(datetime(2016, 6, 2), template=sms_t1)

    create_ft_notification_status(datetime(2016, 7, 1), template=sms_t1)
    create_ft_notification_status(datetime(2016, 7, 1), template=sms_t2)
    create_ft_notification_status(datetime(2016, 7, 1), template=sms_t1, notification_status="created")
    create_ft_notification_status(datetime(2016, 7, 1), template=email_template)

    response = admin_request.get("service.get_monthly_notification_stats", service_id=sample_service.id, year=2016)
    assert len(response["data"]) == 12

    assert response["data"]["2016-06"] == {
        "sms": {
            # it combines the two days
            "delivered": 2
        },
        "email": {},
        "letter": {},
    }
    assert response["data"]["2016-07"] == {
        # it combines the two template types
        "sms": {
            "created": 1,
            "delivered": 2,
        },
        "email": {"delivered": 1},
        "letter": {},
    }


@freeze_time("2016-06-05 12:00:00")
def test_get_monthly_notification_stats_combines_todays_data_and_historic_stats(admin_request, sample_template):
    create_ft_notification_status(datetime(2016, 5, 1), template=sample_template, count=1)
    create_ft_notification_status(
        datetime(2016, 6, 1), template=sample_template, notification_status="created", count=2
    )  # noqa

    create_notification(sample_template, created_at=datetime(2016, 6, 5), status="created")
    create_notification(sample_template, created_at=datetime(2016, 6, 5), status="delivered")

    # this doesn't get returned in the stats because it is old - it should be in ft_notification_status by now
    create_notification(sample_template, created_at=datetime(2016, 6, 4), status="sending")

    response = admin_request.get(
        "service.get_monthly_notification_stats", service_id=sample_template.service_id, year=2016
    )

    assert len(response["data"]) == 3  # apr, may, jun
    assert response["data"]["2016-05"] == {"sms": {"delivered": 1}, "email": {}, "letter": {}}
    assert response["data"]["2016-06"] == {
        "sms": {
            # combines the stats from the historic ft_notification_status and the current notifications
            "created": 3,
            "delivered": 1,
        },
        "email": {},
        "letter": {},
    }


def test_get_monthly_notification_stats_ignores_test_keys(admin_request, sample_service):
    create_ft_notification_status(datetime(2016, 6, 1), service=sample_service, key_type=KEY_TYPE_NORMAL, count=1)
    create_ft_notification_status(datetime(2016, 6, 1), service=sample_service, key_type=KEY_TYPE_TEAM, count=2)
    create_ft_notification_status(datetime(2016, 6, 1), service=sample_service, key_type=KEY_TYPE_TEST, count=4)

    response = admin_request.get("service.get_monthly_notification_stats", service_id=sample_service.id, year=2016)

    assert response["data"]["2016-06"]["sms"] == {"delivered": 3}


def test_get_monthly_notification_stats_checks_dates(admin_request, sample_service):
    t = create_template(sample_service)
    create_ft_notification_status(datetime(2016, 3, 31), template=t, notification_status="created")
    create_ft_notification_status(datetime(2016, 4, 1), template=t, notification_status="sending")
    create_ft_notification_status(datetime(2017, 3, 31), template=t, notification_status="delivered")
    create_ft_notification_status(datetime(2017, 4, 11), template=t, notification_status="permanent-failure")

    response = admin_request.get("service.get_monthly_notification_stats", service_id=sample_service.id, year=2016)

    assert "2016-03" not in response["data"]
    assert "2017-04" not in response["data"]
    assert response["data"]["2016-04"]["sms"] == {"sending": 1}
    assert response["data"]["2017-03"]["sms"] == {"delivered": 1}


def test_get_monthly_notification_stats_only_gets_for_one_service(admin_request, notify_db_session):
    services = [create_service(), create_service(service_name="2")]

    templates = [create_template(services[0]), create_template(services[1])]

    create_ft_notification_status(datetime(2016, 6, 1), template=templates[0], notification_status="created")
    create_ft_notification_status(datetime(2016, 6, 1), template=templates[1], notification_status="delivered")

    response = admin_request.get("service.get_monthly_notification_stats", service_id=services[0].id, year=2016)

    assert response["data"]["2016-06"] == {"sms": {"created": 1}, "email": {}, "letter": {}}
