from unittest.mock import patch

import pytest
from django.http import HttpResponse
from django.urls import reverse
from rest_framework import status
from rest_framework.test import APIClient

from apps.alerts.models import AlertReceiveChannel
from apps.auth_token.auth import ApiTokenAuthentication, ScheduleExportAuthentication, UserScheduleExportAuthentication
from apps.auth_token.models import ScheduleExportAuthToken, UserScheduleExportAuthToken
from apps.integrations.views import AlertManagerAPIView, AmazonSNS
from apps.schedules.models import OnCallScheduleWeb
from apps.user_management.exceptions import OrganizationMovedException
from apps.user_management.middlewares import AMAZON_SNS_HEADERS


@pytest.mark.django_db
def test_organization_region_delete(
    make_organization_and_region,
):
    organization, region = make_organization_and_region()
    organization.save()

    organization.refresh_from_db()
    assert organization.migration_destination.slug == region.slug
    region.delete()

    organization.refresh_from_db()
    assert organization.migration_destination is None


@pytest.mark.django_db
@pytest.mark.parametrize(
    "integration_type,integration_view",
    [
        (AlertReceiveChannel.INTEGRATION_ALERTMANAGER, AlertManagerAPIView()),
        ("amazon_sns", AmazonSNS()),
    ],
)
def test_integration_does_not_raise_exception_organization_moved(
    make_organization,
    make_alert_receive_channel,
    integration_type,
    integration_view,
):
    organization = make_organization()
    alert_receive_channel = make_alert_receive_channel(
        organization=organization,
        integration=integration_type,
    )

    try:
        integration_view.dispatch(alert_channel_key=alert_receive_channel.token)
        raise AssertionError()
    except OrganizationMovedException:
        raise AssertionError()
    except Exception:
        assert True


@pytest.mark.django_db
@pytest.mark.parametrize(
    "integration_type,integration_view",
    [
        (AlertReceiveChannel.INTEGRATION_ALERTMANAGER, AlertManagerAPIView()),
        ("amazon_sns", AmazonSNS()),
    ],
)
def test_integration_raises_exception_organization_moved(
    make_organization_and_region,
    make_alert_receive_channel,
    integration_type,
    integration_view,
):
    organization, region = make_organization_and_region()
    organization.save()

    alert_receive_channel = make_alert_receive_channel(
        organization=organization,
        integration=integration_type,
    )

    try:
        integration_view.dispatch(alert_channel_key=alert_receive_channel.token)
        raise AssertionError()
    except OrganizationMovedException as e:
        assert e.organization == organization


@patch("apps.user_management.middlewares.OrganizationMovedMiddleware.make_request")
@pytest.mark.django_db
@pytest.mark.parametrize(
    "integration_type",
    [
        AlertReceiveChannel.INTEGRATION_ALERTMANAGER,
        "amazon_sns",
    ],
)
def test_organization_moved_middleware(
    mocked_make_request, make_organization_and_region, make_alert_receive_channel, integration_type
):
    organization, region = make_organization_and_region()
    organization.save()

    alert_receive_channel = make_alert_receive_channel(
        organization=organization,
        integration=integration_type,
    )

    expected_message = bytes(f"Redirected to {region.oncall_backend_url}", "utf-8")
    mocked_make_request.return_value = HttpResponse(expected_message, status=status.HTTP_200_OK)

    client = APIClient()
    url = reverse(f"integrations:{integration_type}", kwargs={"alert_channel_key": alert_receive_channel.token})

    data = {"value": "test"}
    response = client.post(url, data, format="json")
    assert mocked_make_request.called
    assert response.content == expected_message
    assert response.status_code == status.HTTP_200_OK


@pytest.mark.django_db
def test_api_token_does_not_raise_exception_organization_moved(
    make_organization,
    make_user_for_organization,
    make_public_api_token,
):
    organization = make_organization()

    admin = make_user_for_organization(organization)
    _, token = make_public_api_token(admin, organization)

    try:
        api_auth = ApiTokenAuthentication()
        api_auth.authenticate_credentials(token)
        assert True
    except OrganizationMovedException:
        raise AssertionError()


@pytest.mark.django_db
def test_api_token_raises_exception_organization_moved(
    make_organization_and_region,
    make_user_for_organization,
    make_public_api_token,
):
    organization, region = make_organization_and_region()
    organization.save()

    admin = make_user_for_organization(organization)
    _, token = make_public_api_token(admin, organization)

    try:
        api_auth = ApiTokenAuthentication()
        api_auth.authenticate_credentials(token)
        raise AssertionError()
    except OrganizationMovedException as e:
        assert e.organization == organization


@pytest.mark.django_db
def test_schedule_export_token_does_not_raise_exception_organization_moved(
    make_organization,
    make_user_for_organization,
    make_public_api_token,
    make_schedule,
):
    organization = make_organization()
    schedule = make_schedule(organization, schedule_class=OnCallScheduleWeb)

    admin = make_user_for_organization(organization)
    _, token = ScheduleExportAuthToken.create_auth_token(admin, organization, schedule)

    try:
        schedule_auth = ScheduleExportAuthentication()
        schedule_auth.authenticate_credentials(token, schedule.public_primary_key)
        assert True
    except OrganizationMovedException:
        raise AssertionError()


@pytest.mark.django_db
def test_schedule_export_token_raises_exception_organization_moved(
    make_organization_and_region,
    make_user_for_organization,
    make_public_api_token,
    make_schedule,
):
    organization, region = make_organization_and_region()
    organization.save()
    schedule = make_schedule(organization, schedule_class=OnCallScheduleWeb)

    admin = make_user_for_organization(organization)
    _, token = ScheduleExportAuthToken.create_auth_token(admin, organization, schedule)

    try:
        schedule_auth = ScheduleExportAuthentication()
        schedule_auth.authenticate_credentials(token, schedule.public_primary_key)
        raise AssertionError()
    except OrganizationMovedException as e:
        assert e.organization == organization


@pytest.mark.django_db
def test_user_schedule_export_token_does_not_raise_exception_organization_moved(
    make_organization,
    make_user_for_organization,
    make_public_api_token,
):
    organization = make_organization()
    admin = make_user_for_organization(organization)
    _, token = UserScheduleExportAuthToken.create_auth_token(admin, organization)

    try:
        user_schedule_auth = UserScheduleExportAuthentication()
        user_schedule_auth.authenticate_credentials(token, admin.public_primary_key)
        assert True
    except OrganizationMovedException:
        raise AssertionError()


@pytest.mark.django_db
def test_user_schedule_export_token_raises_exception_organization_moved(
    make_organization_and_region,
    make_user_for_organization,
    make_public_api_token,
):
    organization, region = make_organization_and_region()
    organization.save()

    admin = make_user_for_organization(organization)
    _, token = UserScheduleExportAuthToken.create_auth_token(admin, organization)

    try:
        user_schedule_auth = UserScheduleExportAuthentication()
        user_schedule_auth.authenticate_credentials(token, admin.public_primary_key)
        raise AssertionError()
    except OrganizationMovedException as e:
        assert e.organization == organization


@patch("apps.user_management.middlewares.OrganizationMovedMiddleware.make_request")
@pytest.mark.django_db
def test_organization_moved_middleware_amazon_sns_headers(
    mocked_make_request, make_organization_and_region, make_alert_receive_channel
):
    organization, region = make_organization_and_region()
    organization.save()

    alert_receive_channel = make_alert_receive_channel(
        organization=organization,
        integration="amazon_sns",
    )

    expected_sns_headers = {
        "HTTP_X_AMZ_SNS_SUBSCRIPTION_ARN": "arn:aws:sns:xxxxxxxxxx:467989492352:oncall-test:3aab6edb-0c5e-4fa9-b876-64409d1f6c63",
        "HTTP_X_AMZ_SNS_TOPIC_ARN": "arn:aws:sns:xxxxxxxxxx:467989492352:oncall-test",
        "HTTP_X_AMZ_SNS_MESSAGE_ID": "473efe1d-8ea4-5252-8124-a3d5ff7408c5",
        "HTTP_X_AMZ_SNS_MESSAGE_TYPE": "Notification",
    }
    expected_message = bytes(f"Redirected to {region.oncall_backend_url}", "utf-8")
    mocked_make_request.return_value = HttpResponse(expected_message, status=status.HTTP_200_OK)

    client = APIClient()
    url = reverse("integrations:amazon_sns", kwargs={"alert_channel_key": alert_receive_channel.token})

    data = {"value": "test"}
    response = client.post(url, data, format="json", **expected_sns_headers)
    assert mocked_make_request.called
    for k in AMAZON_SNS_HEADERS:
        assert expected_sns_headers.get(f'HTTP_{k.upper().replace("-", "_")}') == mocked_make_request.call_args.args[
            2
        ].get(k)
    assert response.content == expected_message
    assert response.status_code == status.HTTP_200_OK