feat(rca): add screen context into investigation details

x-pack/plugins/observability_solution/investigate_app/public/pages/details/components/investigation_details/investigation_details.tsx

@@ -16,6 +16,7 @@ import { useInvestigation } from '../../contexts/investigation_context';
 import { InvestigationHeader } from '../investigation_header/investigation_header';
 import { InvestigationItems } from '../investigation_items/investigation_items';
 import { InvestigationNotes } from '../investigation_notes/investigation_notes';
+import { useScreenContext } from '../../hooks/use_screen_context';
 
 interface Props {
   user: AuthenticatedUser;
@@ -30,6 +31,7 @@ export function InvestigationDetails({ user }: Props) {
       start: { observabilityShared },
     },
   } = useKibana();
+  useScreenContext();
 
   const ObservabilityPageTemplate = observabilityShared.navigation.PageTemplate;
   const { investigation } = useInvestigation();

x-pack/plugins/observability_solution/investigate_app/public/pages/details/hooks/use_fetch_alert.tsx

@@ -40,6 +40,7 @@ export function useFetchAlert({ id }: AlertParams): UseFetchAlertResponse {
         signal,
       });
     },
+    staleTime: 60 * 1000,
     refetchOnWindowFocus: false,
     onError: (error: Error) => {
       toasts.addError(error, {

x-pack/plugins/observability_solution/investigate_app/public/pages/details/hooks/use_screen_context.tsx

@@ -0,0 +1,79 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { alertOriginSchema } from '@kbn/investigation-shared';
+import { ALERT_REASON, ALERT_START, ALERT_STATUS } from '@kbn/rule-data-utils';
+import type { EcsFieldsResponse } from '@kbn/rule-registry-plugin/common';
+import dedent from 'dedent';
+import { useEffect } from 'react';
+import { useKibana } from '../../../hooks/use_kibana';
+import { useInvestigation } from '../contexts/investigation_context';
+import { useFetchAlert } from './use_fetch_alert';
+
+export function useScreenContext() {
+  const {
+    dependencies: {
+      start: { observabilityAIAssistant },
+    },
+  } = useKibana();
+
+  const { investigation } = useInvestigation();
+  const alertOriginInvestigation = alertOriginSchema.safeParse(investigation?.origin);
+  const alertId = alertOriginInvestigation.success ? alertOriginInvestigation.data.id : undefined;
+  const { data: alertDetails, isLoading: isAlertDetailsLoading } = useFetchAlert({ id: alertId });
+
+  useEffect(() => {
+    if (!investigation || isAlertDetailsLoading) {
+      return;
+    }
+
+    observabilityAIAssistant.service.setScreenContext({
+      screenDescription: dedent(`
+        The user is looking at the details of an investigation in order to understand the root cause of an issue.
+        The investigation details include the title, status, tags, and its time range.
+
+        ${alertDetails ? getAlertDetailScreenContext(alertDetails) : ''}
+
+        Title: ${investigation.title}
+        Tags: ${investigation.tags.join(', ')}
+        Status: ${investigation.status}
+        Start time: ${new Date(investigation.params.timeRange.from).toISOString()}
+        End time: ${new Date(investigation.params.timeRange.to).toISOString()}
+      `),
+      data: [
+        {
+          name: 'investigation',
+          description: 'The investigation details, including metadata, notes and items.',
+          value: investigation,
+        },
+        ...(alertDetails
+          ? [
+              {
+                name: 'alert',
+                description: 'The alert details that triggered the investigation.',
+                value: alertDetails,
+              },
+            ]
+          : []),
+      ],
+    });
+  }, [observabilityAIAssistant, investigation, alertDetails, isAlertDetailsLoading]);
+}
+
+function getAlertDetailScreenContext(alertDetail: EcsFieldsResponse) {
+  const alertState = alertDetail[ALERT_STATUS];
+  const alertStarted = alertDetail[ALERT_START];
+
+  return dedent(`The investigation originates from an ${alertState} alert which started at ${alertStarted}.
+
+  ${
+    alertDetail[ALERT_REASON]
+      ? `The reason given for the alert is ${alertDetail[ALERT_REASON]}.`
+      : ''
+  }
+  `);
+}

x-pack/plugins/observability_solution/investigate_app/public/pages/details/investigation_details_page.tsx

@@ -13,8 +13,8 @@ import { InvestigationNotFound } from '../../components/investigation_not_found/
 import { useFetchInvestigation } from '../../hooks/use_fetch_investigation';
 import { useKibana } from '../../hooks/use_kibana';
 import { InvestigationDetails } from './components/investigation_details/investigation_details';
-import { InvestigationDetailsPathParams } from './types';
 import { InvestigationProvider } from './contexts/investigation_context';
+import { InvestigationDetailsPathParams } from './types';
 
 export function InvestigationDetailsPage() {
   const {

x-pack/plugins/observability_solution/investigate_app/public/types.ts

@@ -27,6 +27,10 @@ import type {
 import type { SecurityPluginSetup, SecurityPluginStart } from '@kbn/security-plugin/public';
 import type { UiActionsSetup, UiActionsStart } from '@kbn/ui-actions-plugin/public';
 import type { UnifiedSearchPublicPluginStart } from '@kbn/unified-search-plugin/public';
+import type {
+  ObservabilityAIAssistantPublicSetup,
+  ObservabilityAIAssistantPublicStart,
+} from '@kbn/observability-ai-assistant-plugin/public';
 
 /* eslint-disable @typescript-eslint/no-empty-interface*/
 
@@ -46,6 +50,7 @@ export interface InvestigateAppSetupDependencies {
   unifiedSearch: {};
   uiActions: UiActionsSetup;
   security: SecurityPluginSetup;
+  observabilityAIAssistant: ObservabilityAIAssistantPublicSetup;
 }
 
 export interface InvestigateAppStartDependencies {
@@ -60,6 +65,7 @@ export interface InvestigateAppStartDependencies {
   unifiedSearch: UnifiedSearchPublicPluginStart;
   uiActions: UiActionsStart;
   security: SecurityPluginStart;
+  observabilityAIAssistant: ObservabilityAIAssistantPublicStart;
 }
 
 export interface InvestigateAppPublicSetup {}