fix(DiffFlameGraph): Fix the "Explain Flame Graph" (AI) feature

src/pages/ProfilesExplorerView/components/SceneAiPanel/SceneAiPanel.tsx

@@ -0,0 +1,165 @@
+import { css } from '@emotion/css';
+import { GrafanaTheme2 } from '@grafana/data';
+import { SceneComponentProps, sceneGraph, SceneObjectBase, SceneObjectState } from '@grafana/scenes';
+import { Alert, Button, IconButton, Spinner, useStyles2 } from '@grafana/ui';
+import { getProfileMetric, ProfileMetricId } from '@shared/infrastructure/profile-metrics/getProfileMetric';
+import { DomainHookReturnValue } from '@shared/types/DomainHookReturnValue';
+import { InlineBanner } from '@shared/ui/InlineBanner';
+import { Panel } from '@shared/ui/Panel/Panel';
+import React from 'react';
+
+import { ProfilesDataSourceVariable } from '../../domain/variables/ProfilesDataSourceVariable';
+import { getSceneVariableValue } from '../../helpers/getSceneVariableValue';
+import { AiReply } from './components/AiReply';
+import { FollowUpForm } from './components/FollowUpForm';
+import { useOpenAiChatCompletions } from './domain/useOpenAiChatCompletions';
+import { FetchParams, useFetchDotProfiles } from './infrastructure/useFetchDotProfiles';
+
+interface SceneAiPanelState extends SceneObjectState {}
+
+export class SceneAiPanel extends SceneObjectBase<SceneAiPanelState> {
+  constructor() {
+    super({ key: 'ai-panel' });
+  }
+
+  validateFetchParams(isDiff: boolean, fetchParams: FetchParams) {
+    let params = fetchParams;
+    let error;
+
+    if (isDiff && fetchParams.length !== 2) {
+      error = new Error(
+        `Invalid number of fetch parameters for analyzing the diff flame graph (${fetchParams.length})!`
+      );
+      params = [];
+    } else if (!isDiff && fetchParams.length !== 1) {
+      error = new Error(`Invalid number of fetch parameters for analyzing the flame graph (${fetchParams.length})!`);
+      params = [];
+    }
+
+    return { params, error };
+  }
+
+  useSceneAiPanel = (isDiff: boolean, fetchParams: FetchParams): DomainHookReturnValue => {
+    const dataSourceUid = sceneGraph.findByKeyAndType(this, 'dataSource', ProfilesDataSourceVariable).useState()
+      .value as string;
+
+    const { params, error: validationError } = this.validateFetchParams(isDiff, fetchParams);
+
+    const { error: fetchError, isFetching, profiles } = useFetchDotProfiles(dataSourceUid, params);
+
+    const profileMetricId = getSceneVariableValue(this, 'profileMetricId');
+    const profileType = getProfileMetric(profileMetricId as ProfileMetricId).type;
+
+    const { reply, error: llmError, retry } = useOpenAiChatCompletions(profileType, profiles);
+
+    return {
+      data: {
+        validationError,
+        isLoading: isFetching || (!isFetching && !fetchError && !llmError && !reply.text.trim()),
+        fetchError,
+        llmError,
+        reply,
+        shouldDisplayReply: Boolean(reply?.hasStarted || reply?.hasFinished),
+        shouldDisplayFollowUpForm: !fetchError && !llmError && Boolean(reply?.hasFinished),
+      },
+      actions: {
+        retry,
+        submitFollowupQuestion(question: string) {
+          reply.askFollowupQuestion(question);
+        },
+      },
+    };
+  };
+
+  static Component = ({
+    model,
+    isDiff,
+    fetchParams,
+    onClose,
+  }: SceneComponentProps<SceneAiPanel> & {
+    isDiff: boolean;
+    fetchParams: FetchParams;
+    onClose: () => void;
+  }) => {
+    const styles = useStyles2(getStyles);
+    const { data, actions } = model.useSceneAiPanel(isDiff, fetchParams);
+
+    return (
+      <Panel
+        className={styles.sidePanel}
+        title="Flame graph analysis"
+        isLoading={data.isLoading}
+        headerActions={
+          <IconButton
+            title="Close panel"
+            name="times-circle"
+            variant="secondary"
+            aria-label="close"
+            onClick={onClose}
+          />
+        }
+        dataTestId="ai-panel"
+      >
+        <div className={styles.content}>
+          {data.validationError && (
+            <InlineBanner severity="error" title="Validation error!" errors={[data.validationError]} />
+          )}
+
+          {data.fetchError && (
+            <InlineBanner
+              severity="error"
+              title="Error while loading profile data!"
+              message="Sorry for any inconvenience, please try again later."
+              errors={[data.fetchError]}
+            />
+          )}
+
+          {data.shouldDisplayReply && <AiReply reply={data.reply} />}
+
+          {data.isLoading && (
+            <>
+              <Spinner inline />
+              &nbsp;Analyzing...
+            </>
+          )}
+
+          {data.llmError && (
+            <Alert title="An error occured while generating content using OpenAI!" severity="warning">
+              <div>
+                <div>
+                  <p>{data.llmError.message}</p>
+                  <p>
+                    Sorry for any inconvenience, please retry or if the problem persists, contact your organization
+                    admin.
+                  </p>
+                </div>
+              </div>
+              <Button className={styles.retryButton} variant="secondary" fill="outline" onClick={() => actions.retry()}>
+                Retry
+              </Button>
+            </Alert>
+          )}
+
+          {data.shouldDisplayFollowUpForm && <FollowUpForm onSubmit={actions.submitFollowupQuestion} />}
+        </div>
+      </Panel>
+    );
+  };
+}
+
+const getStyles = (theme: GrafanaTheme2) => ({
+  sidePanel: css`
+    flex: 1 0 50%;
+    margin-left: 8px;
+    max-width: calc(50% - 4px);
+  `,
+  title: css`
+    margin: -4px 0 4px 0;
+  `,
+  content: css`
+    padding: ${theme.spacing(1)};
+  `,
+  retryButton: css`
+    float: right;
+  `,
+});

src/pages/ProfilesExplorerView/components/SceneAiPanel/components/AiButton/AIButton.tsx

@@ -0,0 +1,53 @@
+import { css } from '@emotion/css';
+import { IconName } from '@grafana/data';
+import { Button, useStyles2 } from '@grafana/ui';
+import { reportInteraction } from '@shared/domain/reportInteraction';
+import React, { ReactNode } from 'react';
+
+import { useFetchLlmPluginStatus } from './infrastructure/useFetchLlmPluginStatus';
+
+type AIButtonProps = {
+  children: ReactNode;
+  onClick: (event: React.MouseEvent<HTMLButtonElement>) => void;
+  disabled?: boolean;
+  interactionName: string;
+};
+
+export function AIButton({ children, onClick, disabled, interactionName }: AIButtonProps) {
+  const styles = useStyles2(getStyles);
+  const { isEnabled, error, isFetching } = useFetchLlmPluginStatus();
+
+  let icon: IconName = 'ai';
+  let title = '';
+
+  if (error) {
+    icon = 'shield-exclamation';
+    title = 'Grafana LLM plugin missing or not configured!';
+  } else if (isFetching) {
+    icon = 'fa fa-spinner';
+    title = 'Checking the status of the Grafana LLM plugin...';
+  }
+
+  return (
+    <Button
+      className={styles.aiButton}
+      size="md"
+      fill="text"
+      icon={icon}
+      title={isEnabled ? 'Ask FlameGrot AI' : title}
+      disabled={!isEnabled || disabled}
+      onClick={(event: React.MouseEvent<HTMLButtonElement>) => {
+        reportInteraction(interactionName);
+        onClick(event);
+      }}
+    >
+      {children}
+    </Button>
+  );
+}
+
+const getStyles = () => ({
+  aiButton: css`
+    padding: 0 4px;
+  `,
+});

src/pages/ProfilesExplorerView/components/SceneAiPanel/components/AiButton/infrastructure/useFetchLlmPluginStatus.ts

@@ -0,0 +1,16 @@
+import { llms } from '@grafana/experimental';
+import { useQuery } from '@tanstack/react-query';
+
+export function useFetchLlmPluginStatus() {
+  const { data, isFetching, error } = useQuery({
+    queryKey: ['llm'],
+    queryFn: () => llms.openai.enabled(),
+  });
+
+  if (error) {
+    console.error('Error while checking the status of the Grafana LLM plugin!');
+    console.error(error);
+  }
+
+  return { isEnabled: Boolean(data), isFetching, error };
+}

src/pages/ProfilesExplorerView/components/SceneAiPanel/components/AiReply.tsx

@@ -0,0 +1,113 @@
+import { css } from '@emotion/css';
+import { useStyles2 } from '@grafana/ui';
+import Markdown from 'markdown-to-jsx';
+import React, { ReactNode } from 'react';
+
+import { OpenAiReply } from '../domain/useOpenAiChatCompletions';
+
+// yeah, I know...
+const setNativeValue = (element: Element, value: string) => {
+  const valueSetter = Object!.getOwnPropertyDescriptor(element, 'value')!.set;
+  const prototypeValueSetter = Object!.getOwnPropertyDescriptor(Object.getPrototypeOf(element), 'value')!.set;
+
+  if (valueSetter && valueSetter !== prototypeValueSetter) {
+    prototypeValueSetter!.call(element, value);
+  } else {
+    valueSetter!.call(element, value);
+  }
+};
+
+const onClickSearchTerm = (event: any) => {
+  const searchInputElement = document.querySelector('[placeholder^="Search"]');
+
+  if (searchInputElement === null) {
+    console.error('Cannot find search input element!');
+    return;
+  }
+
+  const value = event.target.textContent.trim();
+
+  setNativeValue(searchInputElement, value);
+
+  searchInputElement.dispatchEvent(new Event('input', { bubbles: true }));
+};
+
+const SearchTerm = ({ children }: { children: ReactNode }) => {
+  const styles = useStyles2(getStyles);
+
+  // If the code block contains newlines, don't make it a search link
+  if (typeof children === 'string' && children.includes('\n')) {
+    return <code>{children}</code>;
+  }
+
+  return (
+    <code className={styles.searchLink} title="Search for this node" onClick={onClickSearchTerm}>
+      {children}
+    </code>
+  );
+};
+
+const MARKDOWN_OPTIONS = {
+  overrides: {
+    code: {
+      component: SearchTerm,
+    },
+  },
+};
+
+type AiReplyProps = {
+  reply: OpenAiReply['reply'];
+};
+
+export function AiReply({ reply }: AiReplyProps) {
+  const styles = useStyles2(getStyles);
+
+  return (
+    <div className={styles.container}>
+      {reply?.messages
+        ?.filter((message) => message.role !== 'system')
+        .map((message) => (
+          <>
+            <div className={styles.reply}>
+              <Markdown options={MARKDOWN_OPTIONS}>{message.content}</Markdown>
+            </div>
+            <hr />
+          </>
+        ))}
+
+      <div className={styles.reply}>
+        <Markdown options={MARKDOWN_OPTIONS}>{reply.text}</Markdown>
+      </div>
+    </div>
+  );
+}
+
+const getStyles = () => ({
+  container: css`
+    width: 100%;
+    height: 100%;
+  `,
+  reply: css`
+    font-size: 13px;
+
+    & ol,
+    & ul {
+      margin: 0 0 16px 24px;
+    }
+  `,
+  searchLink: css`
+    color: rgb(255, 136, 51);
+    border: 1px solid transparent;
+    padding: 2px 4px;
+    cursor: pointer;
+    font-size: 13px;
+
+    &:hover,
+    &:focus,
+    &:active {
+      box-sizing: border-box;
+      border: 1px solid rgb(255, 136, 51, 0.8);
+      border-radius: 4px;
+    }
+  `,
+});