import pytest

from app.models.job import Job
from app.statistics_utils import add_rates_to, statistics_by_state, sum_of_statistics


@pytest.mark.parametrize(
    "delivery_statistics",
    [None, [{}], [{"emails_requested": 0}, {"emails_requested": 0}]],
)
def test_sum_of_statistics_puts_in_defaults_of_zero(delivery_statistics):
    resp = sum_of_statistics(delivery_statistics)

    assert resp == {
        "emails_delivered": 0,
        "emails_requested": 0,
        "emails_failed": 0,
        "sms_requested": 0,
        "sms_delivered": 0,
        "sms_failed": 0,
    }


def test_sum_of_statistics_sums_inputs():
    delivery_statistics = [
        {
            "emails_delivered": 1,
            "emails_requested": 2,
            "emails_failed": 3,
            "sms_requested": 4,
            "sms_delivered": 5,
            "sms_failed": 6,
        },
        {
            "emails_delivered": 10,
            "emails_requested": 20,
            "emails_failed": 30,
            "sms_requested": 40,
            "sms_delivered": 50,
            "sms_failed": 60,
        },
    ]
    resp = sum_of_statistics(delivery_statistics)

    assert resp == {
        "emails_delivered": 11,
        "emails_requested": 22,
        "emails_failed": 33,
        "sms_requested": 44,
        "sms_delivered": 55,
        "sms_failed": 66,
    }


@pytest.mark.parametrize(
    ("emails_failed", "emails_requested", "expected_failure_rate"),
    [(0, 0, "0"), (0, 1, "0.0"), (1, 3, "33.3")],
)
def test_add_rates_sets_email_failure_rate(
    emails_failed, emails_requested, expected_failure_rate
):
    resp = add_rates_to(
        {
            "emails_failed": emails_failed,
            "emails_requested": emails_requested,
            "sms_failed": 0,
            "sms_requested": 0,
        }
    )

    assert resp["emails_failure_rate"] == expected_failure_rate


@pytest.mark.parametrize(
    ("sms_failed", "sms_requested", "expected_failure_rate"),
    [(0, 0, "0"), (0, 1, "0.0"), (1, 3, "33.3")],
)
def test_add_rates_sets_sms_failure_rate(
    sms_failed, sms_requested, expected_failure_rate
):
    resp = add_rates_to(
        {
            "emails_failed": 0,
            "emails_requested": 0,
            "sms_failed": sms_failed,
            "sms_requested": sms_requested,
        }
    )

    assert resp["sms_failure_rate"] == expected_failure_rate


def test_add_rates_keeps_original_raw_data():
    resp = add_rates_to(
        {"emails_failed": 1, "emails_requested": 2, "sms_failed": 3, "sms_requested": 4}
    )

    assert resp["emails_failed"] == 1
    assert resp["emails_requested"] == 2
    assert resp["sms_failed"] == 3
    assert resp["sms_requested"] == 4


def test_service_statistics_by_state():
    resp = statistics_by_state(
        {
            "emails_requested": 3,
            "emails_failed": 1,
            "emails_delivered": 1,
            "sms_requested": 3,
            "sms_failed": 1,
            "sms_delivered": 1,
        }
    )

    for message_type in ["email", "sms"]:
        assert resp[message_type]["processed"] == 3
        assert resp[message_type]["sending"] == 1
        assert resp[message_type]["delivered"] == 1
        assert resp[message_type]["failed"] == 1


@pytest.mark.parametrize(
    ("failed", "delivered", "expected_failure_rate"),
    [(0, 0, 0), (0, 1, 0), (1, 1, 50), (1, 0, 100), (1, 4, 20)],
)
def test_add_rate_to_job_calculates_rate(failed, delivered, expected_failure_rate):
    resp = Job(
        {
            "statistics": [
                {"status": "failed", "count": failed},
                {"status": "delivered", "count": delivered},
            ],
            "id": "foo",
        }
    )

    assert resp.failure_rate == expected_failure_rate


def test_add_rate_to_job_preserves_initial_fields():
    resp = Job(
        {
            "statistics": [
                {"status": "failed", "count": 0},
                {"status": "delivered", "count": 0},
            ],
            "id": "foo",
        }
    )

    assert (
        resp.notifications_failed
        == resp.notifications_delivered
        == resp.failure_rate
        == 0
    )
    assert resp.id == "foo"