Alerting: Disable simplified routing when internal alert manager is disabled (#90648)

* Disable simplified routing when internal alert manager is disabled

* address pr review comments

* add test

* remove unnecessary mocks

public/app/features/alerting/unified/components/rule-editor/NotificationsStep.tsx

@@ -5,7 +5,9 @@ import { useFormContext } from 'react-hook-form';
 import { GrafanaTheme2 } from '@grafana/data';
 import { config } from '@grafana/runtime';
 import { Icon, RadioButtonGroup, Stack, Text, useStyles2 } from '@grafana/ui';
+import { AlertmanagerChoice } from 'app/plugins/datasource/alertmanager/types';
 
+import { alertmanagerApi } from '../../api/alertmanagerApi';
 import { RuleFormType, RuleFormValues } from '../../types/rule-form';
 import { GRAFANA_RULES_SOURCE_NAME } from '../../utils/datasource';
 
@@ -25,6 +27,15 @@ enum RoutingOptions {
   ContactPoint = 'contact point',
 }
 
+function useHasInternalAlertmanagerEnabled() {
+  const { useGetGrafanaAlertingConfigurationStatusQuery } = alertmanagerApi;
+  const { currentData: amChoiceStatus } = useGetGrafanaAlertingConfigurationStatusQuery(undefined);
+  return (
+    amChoiceStatus?.alertmanagersChoice === AlertmanagerChoice.Internal ||
+    amChoiceStatus?.alertmanagersChoice === AlertmanagerChoice.All
+  );
+}
+
 export const NotificationsStep = ({ alertUid }: NotificationsStepProps) => {
   const { watch, getValues, setValue } = useFormContext<RuleFormValues>();
   const styles = useStyles2(getStyles);
@@ -35,7 +46,10 @@ export const NotificationsStep = ({ alertUid }: NotificationsStepProps) => {
   const dataSourceName = watch('dataSourceName') ?? GRAFANA_RULES_SOURCE_NAME;
   const simplifiedRoutingToggleEnabled = config.featureToggles.alertingSimplifiedRouting ?? false;
   const shouldRenderpreview = type === RuleFormType.grafana;
-  const shouldAllowSimplifiedRouting = type === RuleFormType.grafana && simplifiedRoutingToggleEnabled;
+  const hasInternalAlertmanagerEnabled = useHasInternalAlertmanagerEnabled();
+
+  const shouldAllowSimplifiedRouting =
+    type === RuleFormType.grafana && simplifiedRoutingToggleEnabled && hasInternalAlertmanagerEnabled;
 
   function onCloseLabelsEditor(
     labelsToUpdate?: Array<{

public/app/features/alerting/unified/components/rule-editor/alert-rule-form/simplifiedRouting/SimplifiedRuleEditor.test.tsx

@@ -14,6 +14,7 @@ import * as ruler from 'app/features/alerting/unified/api/ruler';
 import * as useContactPoints from 'app/features/alerting/unified/components/contact-points/useContactPoints';
 import { setupMswServer } from 'app/features/alerting/unified/mockApi';
 import { grantUserPermissions, mockDataSource } from 'app/features/alerting/unified/mocks';
+import { setAlertmanagerChoices } from 'app/features/alerting/unified/mocks/server/configure';
 import { AlertmanagerProvider } from 'app/features/alerting/unified/state/AlertmanagerContext';
 import * as utils_config from 'app/features/alerting/unified/utils/config';
 import {
@@ -25,6 +26,7 @@ import {
 import { getDefaultQueries } from 'app/features/alerting/unified/utils/rule-form';
 import { searchFolders } from 'app/features/manage-dashboards/state/actions';
 import { DashboardSearchHit, DashboardSearchItemType } from 'app/features/search/types';
+import { AlertmanagerChoice } from 'app/plugins/datasource/alertmanager/types';
 import { AccessControlAction } from 'app/types';
 import { GrafanaAlertStateDecision } from 'app/types/unified-alerting-dto';
 
@@ -160,6 +162,14 @@ describe('Can create a new grafana managed alert unsing simplified routing', ()
       expect(mocks.api.setRulerRuleGroup).not.toHaveBeenCalled();
     });
   });
+  it('simplified routing is not available when Grafana AM is not enabled', async () => {
+    config.featureToggles.alertingSimplifiedRouting = true;
+    setAlertmanagerChoices(AlertmanagerChoice.External, 1);
+    renderSimplifiedRuleEditor();
+    await waitForElementToBeRemoved(screen.getAllByTestId('Spinner'));
+
+    expect(ui.inputs.simplifiedRouting.contactPointRouting.query()).not.toBeInTheDocument();
+  });
 
   it('can create new grafana managed alert when using simplified routing and selecting a contact point', async () => {
     const contactPointsAvailable: ContactPointWithMetadata[] = [