/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */

import {
  useMemo,
  useState,
  useCallback,
  useEffect,
  useRef,
  useLayoutEffect,
} from 'react';
import { type DOMElement, measureElement } from 'ink';
import { App } from './App.js';
import { AppContext } from './contexts/AppContext.js';
import { UIStateContext, type UIState } from './contexts/UIStateContext.js';
import {
  UIActionsContext,
  type UIActions,
} from './contexts/UIActionsContext.js';
import { ConfigContext } from './contexts/ConfigContext.js';
import {
  type HistoryItem,
  ToolCallStatus,
  type HistoryItemWithoutId,
  type HistoryItemToolGroup,
  AuthState,
  type ConfirmationRequest,
} from './types.js';
import { MessageType, StreamingState } from './types.js';
import { ToolActionsProvider } from './contexts/ToolActionsContext.js';
import {
  type EditorType,
  type Config,
  type IdeInfo,
  type IdeContext,
  type UserTierId,
  type UserFeedbackPayload,
  type AgentDefinition,
  IdeClient,
  ideContextStore,
  getErrorMessage,
  getAllGeminiMdFilenames,
  AuthType,
  clearCachedCredentialFile,
  type ResumedSessionData,
  recordExitFail,
  ShellExecutionService,
  saveApiKey,
  debugLogger,
  coreEvents,
  CoreEvent,
  refreshServerHierarchicalMemory,
  type MemoryChangedPayload,
  writeToStdout,
  disableMouseEvents,
  enterAlternateScreen,
  enableMouseEvents,
  disableLineWrapping,
  shouldEnterAlternateScreen,
  startupProfiler,
  SessionStartSource,
  SessionEndReason,
  generateSummary,
  type ConsentRequestPayload,
  type AgentsDiscoveredPayload,
  ChangeAuthRequestedError,
} from '@google/gemini-cli-core';
import { validateAuthMethod } from '../config/auth.js';
import process from 'node:process';
import { useHistory } from './hooks/useHistoryManager.js';
import { useMemoryMonitor } from './hooks/useMemoryMonitor.js';
import { useThemeCommand } from './hooks/useThemeCommand.js';
import { useAuthCommand } from './auth/useAuth.js';
import { useQuotaAndFallback } from './hooks/useQuotaAndFallback.js';
import { useEditorSettings } from './hooks/useEditorSettings.js';
import { useSettingsCommand } from './hooks/useSettingsCommand.js';
import { useModelCommand } from './hooks/useModelCommand.js';
import { useSlashCommandProcessor } from './hooks/slashCommandProcessor.js';
import { useVimMode } from './contexts/VimModeContext.js';
import { useConsoleMessages } from './hooks/useConsoleMessages.js';
import { useTerminalSize } from './hooks/useTerminalSize.js';
import { calculatePromptWidths } from './components/InputPrompt.js';
import { useApp, useStdout, useStdin } from 'ink';
import { calculateMainAreaWidth } from './utils/ui-sizing.js';
import ansiEscapes from 'ansi-escapes';
import * as fs from 'node:fs';
import { basename } from 'node:path';
import { computeTerminalTitle } from '../utils/windowTitle.js';
import { useTextBuffer } from './components/shared/text-buffer.js';
import { useLogger } from './hooks/useLogger.js';
import { useGeminiStream } from './hooks/useGeminiStream.js';
import { type BackgroundShell } from './hooks/shellCommandProcessor.js';
import { useVim } from './hooks/vim.js';
import { type LoadableSettingScope, SettingScope } from '../config/settings.js';
import { type InitializationResult } from '../core/initializer.js';
import { useFocus } from './hooks/useFocus.js';
import { useKeypress, type Key } from './hooks/useKeypress.js';
import { keyMatchers, Command } from './keyMatchers.js';
import { useLoadingIndicator } from './hooks/useLoadingIndicator.js';
import { useShellInactivityStatus } from './hooks/useShellInactivityStatus.js';
import { useFolderTrust } from './hooks/useFolderTrust.js';
import { useIdeTrustListener } from './hooks/useIdeTrustListener.js';
import { type IdeIntegrationNudgeResult } from './IdeIntegrationNudge.js';
import { appEvents, AppEvent } from '../utils/events.js';
import { type UpdateObject } from './utils/updateCheck.js';
import { setUpdateHandler } from '../utils/handleAutoUpdate.js';
import { registerCleanup, runExitCleanup } from '../utils/cleanup.js';
import { RELAUNCH_EXIT_CODE } from '../utils/processUtils.js';
import type { SessionInfo } from '../utils/sessionUtils.js';
import { useMessageQueue } from './hooks/useMessageQueue.js';
import { useMcpStatus } from './hooks/useMcpStatus.js';
import { useApprovalModeIndicator } from './hooks/useApprovalModeIndicator.js';
import { useSessionStats } from './contexts/SessionContext.js';
import { useGitBranchName } from './hooks/useGitBranchName.js';
import {
  useConfirmUpdateRequests,
  useExtensionUpdates,
} from './hooks/useExtensionUpdates.js';
import { ShellFocusContext } from './contexts/ShellFocusContext.js';
import { type ExtensionManager } from '../config/extension-manager.js';
import { requestConsentInteractive } from '../config/extensions/consent.js';
import { useSessionBrowser } from './hooks/useSessionBrowser.js';
import { useSessionResume } from './hooks/useSessionResume.js';
import { useIncludeDirsTrust } from './hooks/useIncludeDirsTrust.js';
import { isWorkspaceTrusted } from '../config/trustedFolders.js';
import { useAlternateBuffer } from './hooks/useAlternateBuffer.js';
import { useSettings } from './contexts/SettingsContext.js';
import { terminalCapabilityManager } from './utils/terminalCapabilityManager.js';
import { useInputHistoryStore } from './hooks/useInputHistoryStore.js';
import { useBanner } from './hooks/useBanner.js';
import { useHookDisplayState } from './hooks/useHookDisplayState.js';
import { useBackgroundShellManager } from './hooks/useBackgroundShellManager.js';
import {
  WARNING_PROMPT_DURATION_MS,
  QUEUE_ERROR_DISPLAY_DURATION_MS,
} from './constants.js';
import { LoginWithGoogleRestartDialog } from './auth/LoginWithGoogleRestartDialog.js';
import { NewAgentsChoice } from './components/NewAgentsNotification.js';
import { isSlashCommand } from './utils/commandUtils.js';
import { useTerminalTheme } from './hooks/useTerminalTheme.js';
import { isITerm2 } from './utils/terminalUtils.js';

function isToolExecuting(pendingHistoryItems: HistoryItemWithoutId[]) {
  return pendingHistoryItems.some((item) => {
    if (item && item.type === 'tool_group') {
      return item.tools.some(
        (tool) => ToolCallStatus.Executing === tool.status,
      );
    }
    return false;
  });
}

function isToolAwaitingConfirmation(
  pendingHistoryItems: HistoryItemWithoutId[],
) {
  return pendingHistoryItems
    .filter((item): item is HistoryItemToolGroup => item.type === 'tool_group')
    .some((item) =>
      item.tools.some((tool) => ToolCallStatus.Confirming === tool.status),
    );
}

interface AppContainerProps {
  config: Config;
  startupWarnings?: string[];
  version: string;
  initializationResult: InitializationResult;
  resumedSessionData?: ResumedSessionData;
}

/**
 * The fraction of the terminal width to allocate to the shell.
 * This provides horizontal padding.
 */
const SHELL_WIDTH_FRACTION = 0.89;

/**
 * The number of lines to subtract from the available terminal height
 * for the shell. This provides vertical padding and space for other UI elements.
 */
const SHELL_HEIGHT_PADDING = 10;

export const AppContainer = (props: AppContainerProps) => {
  const { config, initializationResult, resumedSessionData } = props;
  const settings = useSettings();

  const historyManager = useHistory({
    chatRecordingService: config.getGeminiClient()?.getChatRecordingService(),
  });

  useMemoryMonitor(historyManager);
  const isAlternateBuffer = useAlternateBuffer();
  const [corgiMode, setCorgiMode] = useState(false);
  const [debugMessage, setDebugMessage] = useState<string>('');
  const [quittingMessages, setQuittingMessages] = useState<
    HistoryItem[] | null
  >(null);
  const [showPrivacyNotice, setShowPrivacyNotice] = useState<boolean>(false);
  const [themeError, setThemeError] = useState<string | null>(
    initializationResult.themeError,
  );
  const [isProcessing, setIsProcessing] = useState<boolean>(false);
  const [embeddedShellFocused, setEmbeddedShellFocused] = useState(false);
  const [showDebugProfiler, setShowDebugProfiler] = useState(false);
  const [customDialog, setCustomDialog] = useState<React.ReactNode | null>(
    null,
  );
  const [copyModeEnabled, setCopyModeEnabled] = useState(false);
  const [pendingRestorePrompt, setPendingRestorePrompt] = useState(false);
  const toggleBackgroundShellRef = useRef<() => void>(() => {});
  const isBackgroundShellVisibleRef = useRef<boolean>(false);
  const backgroundShellsRef = useRef<Map<number, BackgroundShell>>(new Map());

  const [adminSettingsChanged, setAdminSettingsChanged] = useState(false);

  const [shellModeActive, setShellModeActive] = useState(false);
  const [modelSwitchedFromQuotaError, setModelSwitchedFromQuotaError] =
    useState<boolean>(false);
  const [historyRemountKey, setHistoryRemountKey] = useState(0);
  const [settingsNonce, setSettingsNonce] = useState(0);
  const activeHooks = useHookDisplayState();
  const [updateInfo, setUpdateInfo] = useState<UpdateObject | null>(null);
  const [isTrustedFolder, setIsTrustedFolder] = useState<boolean | undefined>(
    () => isWorkspaceTrusted(settings.merged).isTrusted,
  );

  const [queueErrorMessage, setQueueErrorMessage] = useState<string | null>(
    null,
  );

  const [newAgents, setNewAgents] = useState<AgentDefinition[] | null>(null);

  const [defaultBannerText, setDefaultBannerText] = useState('');
  const [warningBannerText, setWarningBannerText] = useState('');
  const [bannerVisible, setBannerVisible] = useState(true);

  const bannerData = useMemo(
    () => ({
      defaultText: defaultBannerText,
      warningText: warningBannerText,
    }),
    [defaultBannerText, warningBannerText],
  );

  const { bannerText } = useBanner(bannerData);

  const extensionManager = config.getExtensionLoader() as ExtensionManager;
  // We are in the interactive CLI, update how we request consent and settings.
  extensionManager.setRequestConsent((description) =>
    requestConsentInteractive(description, addConfirmUpdateExtensionRequest),
  );
  extensionManager.setRequestSetting();

  const { addConfirmUpdateExtensionRequest, confirmUpdateExtensionRequests } =
    useConfirmUpdateRequests();
  const {
    extensionsUpdateState,
    extensionsUpdateStateInternal,
    dispatchExtensionStateUpdate,
  } = useExtensionUpdates(
    extensionManager,
    historyManager.addItem,
    config.getEnableExtensionReloading(),
  );

  const [isPermissionsDialogOpen, setPermissionsDialogOpen] = useState(false);
  const [permissionsDialogProps, setPermissionsDialogProps] = useState<{
    targetDirectory?: string;
  } | null>(null);
  const openPermissionsDialog = useCallback(
    (props?: { targetDirectory?: string }) => {
      setPermissionsDialogOpen(true);
      setPermissionsDialogProps(props ?? null);
    },
    [],
  );
  const closePermissionsDialog = useCallback(() => {
    setPermissionsDialogOpen(false);
    setPermissionsDialogProps(null);
  }, []);

  const [isAgentConfigDialogOpen, setIsAgentConfigDialogOpen] = useState(false);
  const [selectedAgentName, setSelectedAgentName] = useState<
    string | undefined
  >();
  const [selectedAgentDisplayName, setSelectedAgentDisplayName] = useState<
    string | undefined
  >();
  const [selectedAgentDefinition, setSelectedAgentDefinition] = useState<
    AgentDefinition | undefined
  >();

  const openAgentConfigDialog = useCallback(
    (name: string, displayName: string, definition: AgentDefinition) => {
      setSelectedAgentName(name);
      setSelectedAgentDisplayName(displayName);
      setSelectedAgentDefinition(definition);
      setIsAgentConfigDialogOpen(true);
    },
    [],
  );

  const closeAgentConfigDialog = useCallback(() => {
    setIsAgentConfigDialogOpen(false);
    setSelectedAgentName(undefined);
    setSelectedAgentDisplayName(undefined);
    setSelectedAgentDefinition(undefined);
  }, []);

  const toggleDebugProfiler = useCallback(
    () => setShowDebugProfiler((prev) => !prev),
    [],
  );

  const [currentModel, setCurrentModel] = useState(config.getModel());

  const [userTier, setUserTier] = useState<UserTierId | undefined>(undefined);

  const [isConfigInitialized, setConfigInitialized] = useState(false);

  const logger = useLogger(config.storage);
  const { inputHistory, addInput, initializeFromLogger } =
    useInputHistoryStore();

  // Terminal and layout hooks
  const { columns: terminalWidth, rows: terminalHeight } = useTerminalSize();
  const { stdin, setRawMode } = useStdin();
  const { stdout } = useStdout();
  const app = useApp();

  // Additional hooks moved from App.tsx
  const { stats: sessionStats } = useSessionStats();
  const branchName = useGitBranchName(config.getTargetDir());

  // Layout measurements
  const mainControlsRef = useRef<DOMElement>(null);
  // For performance profiling only
  const rootUiRef = useRef<DOMElement>(null);
  const lastTitleRef = useRef<string | null>(null);
  const staticExtraHeight = 3;

  useEffect(() => {
    // eslint-disable-next-line @typescript-eslint/no-floating-promises
    (async () => {
      // Note: the program will not work if this fails so let errors be
      // handled by the global catch.
      await config.initialize();
      setConfigInitialized(true);
      startupProfiler.flush(config);

      const sessionStartSource = resumedSessionData
        ? SessionStartSource.Resume
        : SessionStartSource.Startup;
      const result = await config
        .getHookSystem()
        ?.fireSessionStartEvent(sessionStartSource);

      if (result) {
        if (result.systemMessage) {
          historyManager.addItem(
            {
              type: MessageType.INFO,
              text: result.systemMessage,
            },
            Date.now(),
          );
        }

        const additionalContext = result.getAdditionalContext();
        const geminiClient = config.getGeminiClient();
        if (additionalContext && geminiClient) {
          await geminiClient.addHistory({
            role: 'user',
            parts: [
              { text: `<hook_context>${additionalContext}</hook_context>` },
            ],
          });
        }
      }

      // Fire-and-forget: generate summary for previous session in background
      generateSummary(config).catch((e) => {
        debugLogger.warn('Background summary generation failed:', e);
      });
    })();
    registerCleanup(async () => {
      // Turn off mouse scroll.
      disableMouseEvents();

      // Kill all background shells
      for (const pid of backgroundShellsRef.current.keys()) {
        ShellExecutionService.kill(pid);
      }

      const ideClient = await IdeClient.getInstance();
      await ideClient.disconnect();

      // Fire SessionEnd hook on cleanup (only if hooks are enabled)
      await config?.getHookSystem()?.fireSessionEndEvent(SessionEndReason.Exit);
    });
    // Disable the dependencies check here. historyManager gets flagged
    // but we don't want to react to changes to it because each new history
    // item, including the ones from the start session hook will cause a
    // re-render and an error when we try to reload config.
    //
    // eslint-disable-next-line react-hooks/exhaustive-deps
  }, [config, resumedSessionData]);

  useEffect(
    () => setUpdateHandler(historyManager.addItem, setUpdateInfo),
    [historyManager.addItem],
  );

  // Subscribe to fallback mode and model changes from core
  useEffect(() => {
    const handleModelChanged = () => {
      setCurrentModel(config.getModel());
    };

    coreEvents.on(CoreEvent.ModelChanged, handleModelChanged);
    return () => {
      coreEvents.off(CoreEvent.ModelChanged, handleModelChanged);
    };
  }, [config]);

  useEffect(() => {
    const handleSettingsChanged = () => {
      setSettingsNonce((prev) => prev + 1);
    };

    const handleAdminSettingsChanged = () => {
      setAdminSettingsChanged(true);
    };

    const handleAgentsDiscovered = (payload: AgentsDiscoveredPayload) => {
      setNewAgents(payload.agents);
    };

    coreEvents.on(CoreEvent.SettingsChanged, handleSettingsChanged);
    coreEvents.on(CoreEvent.AdminSettingsChanged, handleAdminSettingsChanged);
    coreEvents.on(CoreEvent.AgentsDiscovered, handleAgentsDiscovered);
    return () => {
      coreEvents.off(CoreEvent.SettingsChanged, handleSettingsChanged);
      coreEvents.off(
        CoreEvent.AdminSettingsChanged,
        handleAdminSettingsChanged,
      );
      coreEvents.off(CoreEvent.AgentsDiscovered, handleAgentsDiscovered);
    };
  }, []);

  const { consoleMessages, clearConsoleMessages: clearConsoleMessagesState } =
    useConsoleMessages();

  const mainAreaWidth = calculateMainAreaWidth(terminalWidth, settings);
  // Derive widths for InputPrompt using shared helper
  const { inputWidth, suggestionsWidth } = useMemo(() => {
    const { inputWidth, suggestionsWidth } =
      calculatePromptWidths(mainAreaWidth);
    return { inputWidth, suggestionsWidth };
  }, [mainAreaWidth]);

  const staticAreaMaxItemHeight = Math.max(terminalHeight * 4, 100);

  const isValidPath = useCallback((filePath: string): boolean => {
    try {
      return fs.existsSync(filePath) && fs.statSync(filePath).isFile();
    } catch (_e) {
      return false;
    }
  }, []);

  const getPreferredEditor = useCallback(
    () => settings.merged.general.preferredEditor as EditorType,
    [settings.merged.general.preferredEditor],
  );

  const buffer = useTextBuffer({
    initialText: '',
    viewport: { height: 10, width: inputWidth },
    stdin,
    setRawMode,
    isValidPath,
    shellModeActive,
    getPreferredEditor,
  });
  const bufferRef = useRef(buffer);
  useEffect(() => {
    bufferRef.current = buffer;
  }, [buffer]);

  const stableSetText = useCallback((text: string) => {
    bufferRef.current.setText(text);
  }, []);

  // Initialize input history from logger (past sessions)
  useEffect(() => {
    // eslint-disable-next-line @typescript-eslint/no-floating-promises
    initializeFromLogger(logger);
  }, [logger, initializeFromLogger]);

  const refreshStatic = useCallback(() => {
    if (!isAlternateBuffer) {
      stdout.write(ansiEscapes.clearTerminal);
    }
    setHistoryRemountKey((prev) => prev + 1);
  }, [setHistoryRemountKey, isAlternateBuffer, stdout]);

  const handleEditorClose = useCallback(() => {
    if (
      shouldEnterAlternateScreen(isAlternateBuffer, config.getScreenReader())
    ) {
      // The editor may have exited alternate buffer mode so we need to
      // enter it again to be safe.
      enterAlternateScreen();
      enableMouseEvents();
      disableLineWrapping();
      app.rerender();
    }
    terminalCapabilityManager.enableSupportedModes();
    refreshStatic();
  }, [refreshStatic, isAlternateBuffer, app, config]);

  const [editorError, setEditorError] = useState<string | null>(null);
  const {
    isEditorDialogOpen,
    openEditorDialog,
    handleEditorSelect,
    exitEditorDialog,
  } = useEditorSettings(settings, setEditorError, historyManager.addItem);

  useEffect(() => {
    coreEvents.on(CoreEvent.ExternalEditorClosed, handleEditorClose);
    coreEvents.on(CoreEvent.RequestEditorSelection, openEditorDialog);
    return () => {
      coreEvents.off(CoreEvent.ExternalEditorClosed, handleEditorClose);
      coreEvents.off(CoreEvent.RequestEditorSelection, openEditorDialog);
    };
  }, [handleEditorClose, openEditorDialog]);

  useEffect(() => {
    if (
      !(settings.merged.ui.hideBanner || config.getScreenReader()) &&
      bannerVisible &&
      bannerText
    ) {
      // The header should show a banner but the Header is rendered in static
      // so we must trigger a static refresh for it to be visible.
      refreshStatic();
    }
  }, [bannerVisible, bannerText, settings, config, refreshStatic]);

  const { isSettingsDialogOpen, openSettingsDialog, closeSettingsDialog } =
    useSettingsCommand();

  const {
    isThemeDialogOpen,
    openThemeDialog,
    closeThemeDialog,
    handleThemeSelect,
    handleThemeHighlight,
  } = useThemeCommand(
    settings,
    setThemeError,
    historyManager.addItem,
    initializationResult.themeError,
  );

  // Poll for terminal background color changes to auto-switch theme
  useTerminalTheme(handleThemeSelect, config);

  const {
    authState,
    setAuthState,
    authError,
    onAuthError,
    apiKeyDefaultValue,
    reloadApiKey,
  } = useAuthCommand(settings, config, initializationResult.authError);
  const [authContext, setAuthContext] = useState<{ requiresRestart?: boolean }>(
    {},
  );

  useEffect(() => {
    if (authState === AuthState.Authenticated && authContext.requiresRestart) {
      setAuthState(AuthState.AwaitingGoogleLoginRestart);
      setAuthContext({});
    }
  }, [authState, authContext, setAuthState]);

  const {
    proQuotaRequest,
    handleProQuotaChoice,
    validationRequest,
    handleValidationChoice,
  } = useQuotaAndFallback({
    config,
    historyManager,
    userTier,
    setModelSwitchedFromQuotaError,
    onShowAuthSelection: () => setAuthState(AuthState.Updating),
  });

  // Derive auth state variables for backward compatibility with UIStateContext
  const isAuthDialogOpen = authState === AuthState.Updating;
  const isAuthenticating = authState === AuthState.Unauthenticated;

  // Session browser and resume functionality
  const isGeminiClientInitialized = config.getGeminiClient()?.isInitialized();

  const { loadHistoryForResume, isResuming } = useSessionResume({
    config,
    historyManager,
    refreshStatic,
    isGeminiClientInitialized,
    setQuittingMessages,
    resumedSessionData,
    isAuthenticating,
  });
  const {
    isSessionBrowserOpen,
    openSessionBrowser,
    closeSessionBrowser,
    handleResumeSession,
    handleDeleteSession: handleDeleteSessionSync,
  } = useSessionBrowser(config, loadHistoryForResume);
  // Wrap handleDeleteSession to return a Promise for UIActions interface
  const handleDeleteSession = useCallback(
    async (session: SessionInfo): Promise<void> => {
      handleDeleteSessionSync(session);
    },
    [handleDeleteSessionSync],
  );

  // Create handleAuthSelect wrapper for backward compatibility
  const handleAuthSelect = useCallback(
    async (authType: AuthType | undefined, scope: LoadableSettingScope) => {
      if (authType) {
        if (authType === AuthType.LOGIN_WITH_GOOGLE) {
          setAuthContext({ requiresRestart: true });
        } else {
          setAuthContext({});
        }
        await clearCachedCredentialFile();
        settings.setValue(scope, 'security.auth.selectedType', authType);

        try {
          await config.refreshAuth(authType);
          setAuthState(AuthState.Authenticated);
        } catch (e) {
          if (e instanceof ChangeAuthRequestedError) {
            return;
          }
          onAuthError(
            `Failed to authenticate: ${e instanceof Error ? e.message : String(e)}`,
          );
          return;
        }

        if (
          authType === AuthType.LOGIN_WITH_GOOGLE &&
          config.isBrowserLaunchSuppressed()
        ) {
          await runExitCleanup();
          writeToStdout(`
----------------------------------------------------------------
Logging in with Google... Restarting Gemini CLI to continue.
----------------------------------------------------------------
          `);
          process.exit(RELAUNCH_EXIT_CODE);
        }
      }
      setAuthState(AuthState.Authenticated);
    },
    [settings, config, setAuthState, onAuthError, setAuthContext],
  );

  const handleApiKeySubmit = useCallback(
    async (apiKey: string) => {
      try {
        onAuthError(null);
        if (!apiKey.trim() && apiKey.length > 1) {
          onAuthError(
            'API key cannot be empty string with length greater than 1.',
          );
          return;
        }

        await saveApiKey(apiKey);
        await reloadApiKey();
        await config.refreshAuth(AuthType.USE_GEMINI);
        setAuthState(AuthState.Authenticated);
      } catch (e) {
        onAuthError(
          `Failed to save API key: ${e instanceof Error ? e.message : String(e)}`,
        );
      }
    },
    [setAuthState, onAuthError, reloadApiKey, config],
  );

  const handleApiKeyCancel = useCallback(() => {
    // Go back to auth method selection
    setAuthState(AuthState.Updating);
  }, [setAuthState]);

  // Sync user tier from config when authentication changes
  useEffect(() => {
    // Only sync when not currently authenticating
    if (authState === AuthState.Authenticated) {
      setUserTier(config.getUserTier());
    }
  }, [config, authState]);

  // Check for enforced auth type mismatch
  useEffect(() => {
    if (
      settings.merged.security.auth.enforcedType &&
      settings.merged.security.auth.selectedType &&
      settings.merged.security.auth.enforcedType !==
        settings.merged.security.auth.selectedType
    ) {
      onAuthError(
        `Authentication is enforced to be ${settings.merged.security.auth.enforcedType}, but you are currently using ${settings.merged.security.auth.selectedType}.`,
      );
    } else if (
      settings.merged.security.auth.selectedType &&
      !settings.merged.security.auth.useExternal
    ) {
      // We skip validation for Gemini API key here because it might be stored
      // in the keychain, which we can't check synchronously.
      // The useAuth hook handles validation for this case.
      if (settings.merged.security.auth.selectedType === AuthType.USE_GEMINI) {
        return;
      }

      const error = validateAuthMethod(
        settings.merged.security.auth.selectedType,
      );
      if (error) {
        onAuthError(error);
      }
    }
  }, [
    settings.merged.security.auth.selectedType,
    settings.merged.security.auth.enforcedType,
    settings.merged.security.auth.useExternal,
    onAuthError,
  ]);

  const { isModelDialogOpen, openModelDialog, closeModelDialog } =
    useModelCommand();

  const { toggleVimEnabled } = useVimMode();

  const setIsBackgroundShellListOpenRef = useRef<(open: boolean) => void>(
    () => {},
  );
  const [shortcutsHelpVisible, setShortcutsHelpVisible] = useState(false);

  const slashCommandActions = useMemo(
    () => ({
      openAuthDialog: () => setAuthState(AuthState.Updating),
      openThemeDialog,
      openEditorDialog,
      openPrivacyNotice: () => setShowPrivacyNotice(true),
      openSettingsDialog,
      openSessionBrowser,
      openModelDialog,
      openAgentConfigDialog,
      openPermissionsDialog,
      quit: (messages: HistoryItem[]) => {
        setQuittingMessages(messages);
        setTimeout(async () => {
          await runExitCleanup();
          process.exit(0);
        }, 100);
      },
      setDebugMessage,
      toggleCorgiMode: () => setCorgiMode((prev) => !prev),
      toggleDebugProfiler,
      dispatchExtensionStateUpdate,
      addConfirmUpdateExtensionRequest,
      toggleBackgroundShell: () => {
        toggleBackgroundShellRef.current();
        if (!isBackgroundShellVisibleRef.current) {
          setEmbeddedShellFocused(true);
          if (backgroundShellsRef.current.size > 1) {
            setIsBackgroundShellListOpenRef.current(true);
          } else {
            setIsBackgroundShellListOpenRef.current(false);
          }
        }
      },
      toggleShortcutsHelp: () => setShortcutsHelpVisible((visible) => !visible),
      setText: stableSetText,
    }),
    [
      setAuthState,
      openThemeDialog,
      openEditorDialog,
      openSettingsDialog,
      openSessionBrowser,
      openModelDialog,
      openAgentConfigDialog,
      setQuittingMessages,
      setDebugMessage,
      setShowPrivacyNotice,
      setCorgiMode,
      dispatchExtensionStateUpdate,
      openPermissionsDialog,
      addConfirmUpdateExtensionRequest,
      toggleDebugProfiler,
      setShortcutsHelpVisible,
      stableSetText,
    ],
  );

  const {
    handleSlashCommand,
    slashCommands,
    pendingHistoryItems: pendingSlashCommandHistoryItems,
    commandContext,
    confirmationRequest: commandConfirmationRequest,
  } = useSlashCommandProcessor(
    config,
    settings,
    historyManager.addItem,
    historyManager.clearItems,
    historyManager.loadHistory,
    refreshStatic,
    toggleVimEnabled,
    setIsProcessing,
    slashCommandActions,
    extensionsUpdateStateInternal,
    isConfigInitialized,
    setBannerVisible,
    setCustomDialog,
  );

  const [authConsentRequest, setAuthConsentRequest] =
    useState<ConfirmationRequest | null>(null);

  useEffect(() => {
    const handleConsentRequest = (payload: ConsentRequestPayload) => {
      setAuthConsentRequest({
        prompt: payload.prompt,
        onConfirm: (confirmed: boolean) => {
          setAuthConsentRequest(null);
          payload.onConfirm(confirmed);
        },
      });
    };

    coreEvents.on(CoreEvent.ConsentRequest, handleConsentRequest);
    return () => {
      coreEvents.off(CoreEvent.ConsentRequest, handleConsentRequest);
    };
  }, []);

  const performMemoryRefresh = useCallback(async () => {
    historyManager.addItem(
      {
        type: MessageType.INFO,
        text: 'Refreshing hierarchical memory (GEMINI.md or other context files)...',
      },
      Date.now(),
    );
    try {
      const { memoryContent, fileCount } =
        await refreshServerHierarchicalMemory(config);

      historyManager.addItem(
        {
          type: MessageType.INFO,
          text: `Memory refreshed successfully. ${
            memoryContent.length > 0
              ? `Loaded ${memoryContent.length} characters from ${fileCount} file(s).`
              : 'No memory content found.'
          }`,
        },
        Date.now(),
      );
      if (config.getDebugMode()) {
        debugLogger.log(
          `[DEBUG] Refreshed memory content in config: ${memoryContent.substring(
            0,
            200,
          )}...`,
        );
      }
    } catch (error) {
      const errorMessage = getErrorMessage(error);
      historyManager.addItem(
        {
          type: MessageType.ERROR,
          text: `Error refreshing memory: ${errorMessage}`,
        },
        Date.now(),
      );
      debugLogger.warn('Error refreshing memory:', error);
    }
  }, [config, historyManager]);

  const cancelHandlerRef = useRef<(shouldRestorePrompt?: boolean) => void>(
    () => {},
  );

  const onCancelSubmit = useCallback((shouldRestorePrompt?: boolean) => {
    if (shouldRestorePrompt) {
      setPendingRestorePrompt(true);
    } else {
      setPendingRestorePrompt(false);
      cancelHandlerRef.current(false);
    }
  }, []);

  useEffect(() => {
    if (pendingRestorePrompt) {
      const lastHistoryUserMsg = historyManager.history.findLast(
        (h) => h.type === 'user',
      );
      const lastUserMsg = inputHistory.at(-1);

      if (
        !lastHistoryUserMsg ||
        (typeof lastHistoryUserMsg.text === 'string' &&
          lastHistoryUserMsg.text === lastUserMsg)
      ) {
        cancelHandlerRef.current(true);
        setPendingRestorePrompt(false);
      }
    }
  }, [pendingRestorePrompt, inputHistory, historyManager.history]);

  const {
    streamingState,
    submitQuery,
    initError,
    pendingHistoryItems: pendingGeminiHistoryItems,
    thought,
    cancelOngoingRequest,
    pendingToolCalls,
    handleApprovalModeChange,
    activePtyId,
    loopDetectionConfirmationRequest,
    lastOutputTime,
    backgroundShellCount,
    isBackgroundShellVisible,
    toggleBackgroundShell,
    backgroundCurrentShell,
    backgroundShells,
    dismissBackgroundShell,
    retryStatus,
  } = useGeminiStream(
    config.getGeminiClient(),
    historyManager.history,
    historyManager.addItem,
    config,
    settings,
    setDebugMessage,
    handleSlashCommand,
    shellModeActive,
    getPreferredEditor,
    onAuthError,
    performMemoryRefresh,
    modelSwitchedFromQuotaError,
    setModelSwitchedFromQuotaError,
    onCancelSubmit,
    setEmbeddedShellFocused,
    terminalWidth,
    terminalHeight,
    embeddedShellFocused,
  );

  toggleBackgroundShellRef.current = toggleBackgroundShell;
  isBackgroundShellVisibleRef.current = isBackgroundShellVisible;
  backgroundShellsRef.current = backgroundShells;

  const {
    activeBackgroundShellPid,
    setIsBackgroundShellListOpen,
    isBackgroundShellListOpen,
    setActiveBackgroundShellPid,
    backgroundShellHeight,
  } = useBackgroundShellManager({
    backgroundShells,
    backgroundShellCount,
    isBackgroundShellVisible,
    activePtyId,
    embeddedShellFocused,
    setEmbeddedShellFocused,
    terminalHeight,
  });

  setIsBackgroundShellListOpenRef.current = setIsBackgroundShellListOpen;

  const lastOutputTimeRef = useRef(0);

  useEffect(() => {
    lastOutputTimeRef.current = lastOutputTime;
  }, [lastOutputTime]);

  const { shouldShowFocusHint, inactivityStatus } = useShellInactivityStatus({
    activePtyId,
    lastOutputTime,
    streamingState,
    pendingToolCalls,
    embeddedShellFocused,
    isInteractiveShellEnabled: config.isInteractiveShellEnabled(),
  });

  const shouldShowActionRequiredTitle = inactivityStatus === 'action_required';
  const shouldShowSilentWorkingTitle = inactivityStatus === 'silent_working';

  // Auto-accept indicator
  const showApprovalModeIndicator = useApprovalModeIndicator({
    config,
    addItem: historyManager.addItem,
    onApprovalModeChange: handleApprovalModeChange,
    isActive: !embeddedShellFocused,
  });

  const { isMcpReady } = useMcpStatus(config);

  const {
    messageQueue,
    addMessage,
    clearQueue,
    getQueuedMessagesText,
    popAllMessages,
  } = useMessageQueue({
    isConfigInitialized,
    streamingState,
    submitQuery,
    isMcpReady,
  });

  cancelHandlerRef.current = useCallback(
    (shouldRestorePrompt: boolean = true) => {
      const pendingHistoryItems = [
        ...pendingSlashCommandHistoryItems,
        ...pendingGeminiHistoryItems,
      ];
      if (isToolAwaitingConfirmation(pendingHistoryItems)) {
        return; // Don't clear - user may be composing a follow-up message
      }
      if (isToolExecuting(pendingHistoryItems)) {
        buffer.setText(''); // Clear for Ctrl+C cancellation
        return;
      }

      const lastUserMessage = inputHistory.at(-1);
      let textToSet = shouldRestorePrompt ? lastUserMessage || '' : '';

      const queuedText = getQueuedMessagesText();
      if (queuedText) {
        textToSet = textToSet ? `${textToSet}\n\n${queuedText}` : queuedText;
        clearQueue();
      }

      if (textToSet || !shouldRestorePrompt) {
        buffer.setText(textToSet);
      }
    },
    [
      buffer,
      inputHistory,
      getQueuedMessagesText,
      clearQueue,
      pendingSlashCommandHistoryItems,
      pendingGeminiHistoryItems,
    ],
  );

  const handleFinalSubmit = useCallback(
    (submittedValue: string) => {
      const isSlash = isSlashCommand(submittedValue.trim());
      const isIdle = streamingState === StreamingState.Idle;

      if (isSlash || (isIdle && isMcpReady)) {
        void submitQuery(submittedValue);
      } else {
        // Check messageQueue.length === 0 to only notify on the first queued item
        if (isIdle && !isMcpReady && messageQueue.length === 0) {
          coreEvents.emitFeedback(
            'info',
            'Waiting for MCP servers to initialize... Slash commands are still available and prompts will be queued.',
          );
        }
        addMessage(submittedValue);
      }
      addInput(submittedValue); // Track input for up-arrow history
    },
    [
      addMessage,
      addInput,
      submitQuery,
      isMcpReady,
      streamingState,
      messageQueue.length,
    ],
  );

  const handleClearScreen = useCallback(() => {
    historyManager.clearItems();
    clearConsoleMessagesState();
    refreshStatic();
  }, [historyManager, clearConsoleMessagesState, refreshStatic]);

  const { handleInput: vimHandleInput } = useVim(buffer, handleFinalSubmit);

  /**
   * Determines if the input prompt should be active and accept user input.
   * Input is disabled during:
   * - Initialization errors
   * - Slash command processing
   * - Tool confirmations (WaitingForConfirmation state)
   * - Any future streaming states not explicitly allowed
   */
  const isInputActive =
    isConfigInitialized &&
    !initError &&
    !isProcessing &&
    !isResuming &&
    !!slashCommands &&
    (streamingState === StreamingState.Idle ||
      streamingState === StreamingState.Responding) &&
    !proQuotaRequest;

  const [controlsHeight, setControlsHeight] = useState(0);

  useLayoutEffect(() => {
    if (mainControlsRef.current) {
      const fullFooterMeasurement = measureElement(mainControlsRef.current);
      if (
        fullFooterMeasurement.height > 0 &&
        fullFooterMeasurement.height !== controlsHeight
      ) {
        setControlsHeight(fullFooterMeasurement.height);
      }
    }
  }, [buffer, terminalWidth, terminalHeight, controlsHeight]);

  // Compute available terminal height based on controls measurement
  const availableTerminalHeight = Math.max(
    0,
    terminalHeight -
      controlsHeight -
      staticExtraHeight -
      2 -
      backgroundShellHeight,
  );

  config.setShellExecutionConfig({
    terminalWidth: Math.floor(terminalWidth * SHELL_WIDTH_FRACTION),
    terminalHeight: Math.max(
      Math.floor(availableTerminalHeight - SHELL_HEIGHT_PADDING),
      1,
    ),
    pager: settings.merged.tools.shell.pager,
    showColor: settings.merged.tools.shell.showColor,
    sanitizationConfig: config.sanitizationConfig,
  });

  const isFocused = useFocus();

  // Context file names computation
  const contextFileNames = useMemo(() => {
    const fromSettings = settings.merged.context.fileName;
    return fromSettings
      ? Array.isArray(fromSettings)
        ? fromSettings
        : [fromSettings]
      : getAllGeminiMdFilenames();
  }, [settings.merged.context.fileName]);
  // Initial prompt handling
  const initialPrompt = useMemo(() => config.getQuestion(), [config]);
  const initialPromptSubmitted = useRef(false);
  const geminiClient = config.getGeminiClient();

  useEffect(() => {
    if (activePtyId) {
      try {
        ShellExecutionService.resizePty(
          activePtyId,
          Math.floor(terminalWidth * SHELL_WIDTH_FRACTION),
          Math.max(
            Math.floor(availableTerminalHeight - SHELL_HEIGHT_PADDING),
            1,
          ),
        );
      } catch (e) {
        // This can happen in a race condition where the pty exits
        // right before we try to resize it.
        if (
          !(
            e instanceof Error &&
            e.message.includes('Cannot resize a pty that has already exited')
          )
        ) {
          throw e;
        }
      }
    }
  }, [terminalWidth, availableTerminalHeight, activePtyId]);

  useEffect(() => {
    if (
      initialPrompt &&
      isConfigInitialized &&
      !initialPromptSubmitted.current &&
      !isAuthenticating &&
      !isAuthDialogOpen &&
      !isThemeDialogOpen &&
      !isEditorDialogOpen &&
      !showPrivacyNotice &&
      geminiClient?.isInitialized?.()
    ) {
      handleFinalSubmit(initialPrompt);
      initialPromptSubmitted.current = true;
    }
  }, [
    initialPrompt,
    isConfigInitialized,
    handleFinalSubmit,
    isAuthenticating,
    isAuthDialogOpen,
    isThemeDialogOpen,
    isEditorDialogOpen,
    showPrivacyNotice,
    geminiClient,
  ]);

  const [idePromptAnswered, setIdePromptAnswered] = useState(false);
  const [currentIDE, setCurrentIDE] = useState<IdeInfo | null>(null);

  useEffect(() => {
    const getIde = async () => {
      const ideClient = await IdeClient.getInstance();
      const currentIde = ideClient.getCurrentIde();
      setCurrentIDE(currentIde || null);
    };
    // eslint-disable-next-line @typescript-eslint/no-floating-promises
    getIde();
  }, []);
  const shouldShowIdePrompt = Boolean(
    currentIDE &&
      !config.getIdeMode() &&
      !settings.merged.ide.hasSeenNudge &&
      !idePromptAnswered,
  );

  const [showErrorDetails, setShowErrorDetails] = useState<boolean>(false);
  const [showFullTodos, setShowFullTodos] = useState<boolean>(false);
  const [renderMarkdown, setRenderMarkdown] = useState<boolean>(true);

  const [ctrlCPressCount, setCtrlCPressCount] = useState(0);
  const ctrlCTimerRef = useRef<NodeJS.Timeout | null>(null);
  const [ctrlDPressCount, setCtrlDPressCount] = useState(0);
  const ctrlDTimerRef = useRef<NodeJS.Timeout | null>(null);
  const [constrainHeight, setConstrainHeight] = useState<boolean>(true);
  const [ideContextState, setIdeContextState] = useState<
    IdeContext | undefined
  >();
  const [showEscapePrompt, setShowEscapePrompt] = useState(false);
  const [showIdeRestartPrompt, setShowIdeRestartPrompt] = useState(false);
  const [warningMessage, setWarningMessage] = useState<string | null>(null);

  const { isFolderTrustDialogOpen, handleFolderTrustSelect, isRestarting } =
    useFolderTrust(settings, setIsTrustedFolder, historyManager.addItem);
  const {
    needsRestart: ideNeedsRestart,
    restartReason: ideTrustRestartReason,
  } = useIdeTrustListener();
  const isInitialMount = useRef(true);

  useIncludeDirsTrust(config, isTrustedFolder, historyManager, setCustomDialog);

  const warningTimeoutRef = useRef<NodeJS.Timeout | null>(null);
  const tabFocusTimeoutRef = useRef<NodeJS.Timeout | null>(null);

  const handleWarning = useCallback((message: string) => {
    setWarningMessage(message);
    if (warningTimeoutRef.current) {
      clearTimeout(warningTimeoutRef.current);
    }
    warningTimeoutRef.current = setTimeout(() => {
      setWarningMessage(null);
    }, WARNING_PROMPT_DURATION_MS);
  }, []);

  // Handle timeout cleanup on unmount
  useEffect(
    () => () => {
      if (warningTimeoutRef.current) {
        clearTimeout(warningTimeoutRef.current);
      }
      if (tabFocusTimeoutRef.current) {
        clearTimeout(tabFocusTimeoutRef.current);
      }
    },
    [],
  );

  useEffect(() => {
    const handlePasteTimeout = () => {
      handleWarning('Paste Timed out. Possibly due to slow connection.');
    };
    appEvents.on(AppEvent.PasteTimeout, handlePasteTimeout);
    return () => {
      appEvents.off(AppEvent.PasteTimeout, handlePasteTimeout);
    };
  }, [handleWarning]);

  useEffect(() => {
    if (ideNeedsRestart) {
      // IDE trust changed, force a restart.
      setShowIdeRestartPrompt(true);
    }
  }, [ideNeedsRestart]);

  useEffect(() => {
    if (queueErrorMessage) {
      const timer = setTimeout(() => {
        setQueueErrorMessage(null);
      }, QUEUE_ERROR_DISPLAY_DURATION_MS);

      return () => clearTimeout(timer);
    }
    return undefined;
  }, [queueErrorMessage, setQueueErrorMessage]);

  useEffect(() => {
    if (isInitialMount.current) {
      isInitialMount.current = false;
      return;
    }

    const handler = setTimeout(() => {
      refreshStatic();
    }, 300);

    return () => {
      clearTimeout(handler);
    };
  }, [terminalWidth, refreshStatic]);

  useEffect(() => {
    const unsubscribe = ideContextStore.subscribe(setIdeContextState);
    setIdeContextState(ideContextStore.get());
    return unsubscribe;
  }, []);

  useEffect(() => {
    const openDebugConsole = () => {
      setShowErrorDetails(true);
      setConstrainHeight(false);
    };
    appEvents.on(AppEvent.OpenDebugConsole, openDebugConsole);

    return () => {
      appEvents.off(AppEvent.OpenDebugConsole, openDebugConsole);
    };
  }, [config]);

  useEffect(() => {
    if (ctrlCTimerRef.current) {
      clearTimeout(ctrlCTimerRef.current);
      ctrlCTimerRef.current = null;
    }
    if (ctrlCPressCount > 2) {
      recordExitFail(config);
    }
    if (ctrlCPressCount > 1) {
      // eslint-disable-next-line @typescript-eslint/no-floating-promises
      handleSlashCommand('/quit', undefined, undefined, false);
    } else if (ctrlCPressCount > 0) {
      ctrlCTimerRef.current = setTimeout(() => {
        setCtrlCPressCount(0);
        ctrlCTimerRef.current = null;
      }, WARNING_PROMPT_DURATION_MS);
    }
  }, [ctrlCPressCount, config, setCtrlCPressCount, handleSlashCommand]);

  useEffect(() => {
    if (ctrlDTimerRef.current) {
      clearTimeout(ctrlDTimerRef.current);
      ctrlCTimerRef.current = null;
    }
    if (ctrlDPressCount > 2) {
      recordExitFail(config);
    }
    if (ctrlDPressCount > 1) {
      // eslint-disable-next-line @typescript-eslint/no-floating-promises
      handleSlashCommand('/quit', undefined, undefined, false);
    } else if (ctrlDPressCount > 0) {
      ctrlDTimerRef.current = setTimeout(() => {
        setCtrlDPressCount(0);
        ctrlDTimerRef.current = null;
      }, WARNING_PROMPT_DURATION_MS);
    }
  }, [ctrlDPressCount, config, setCtrlDPressCount, handleSlashCommand]);

  const handleEscapePromptChange = useCallback((showPrompt: boolean) => {
    setShowEscapePrompt(showPrompt);
  }, []);

  const handleIdePromptComplete = useCallback(
    (result: IdeIntegrationNudgeResult) => {
      if (result.userSelection === 'yes') {
        // eslint-disable-next-line @typescript-eslint/no-floating-promises
        handleSlashCommand('/ide install');
        settings.setValue(
          SettingScope.User,
          'hasSeenIdeIntegrationNudge',
          true,
        );
      } else if (result.userSelection === 'dismiss') {
        settings.setValue(
          SettingScope.User,
          'hasSeenIdeIntegrationNudge',
          true,
        );
      }
      setIdePromptAnswered(true);
    },
    [handleSlashCommand, settings],
  );

  const { elapsedTime, currentLoadingPhrase } = useLoadingIndicator({
    streamingState,
    shouldShowFocusHint,
    retryStatus,
  });

  const handleGlobalKeypress = useCallback(
    (key: Key): boolean => {
      if (copyModeEnabled) {
        setCopyModeEnabled(false);
        enableMouseEvents();
        // We don't want to process any other keys if we're in copy mode.
        return true;
      }

      // Debug log keystrokes if enabled
      if (settings.merged.general.debugKeystrokeLogging) {
        debugLogger.log('[DEBUG] Keystroke:', JSON.stringify(key));
      }

      if (isAlternateBuffer && keyMatchers[Command.TOGGLE_COPY_MODE](key)) {
        setCopyModeEnabled(true);
        disableMouseEvents();
        return true;
      }

      if (keyMatchers[Command.QUIT](key)) {
        // If the user presses Ctrl+C, we want to cancel any ongoing requests.
        // This should happen regardless of the count.
        cancelOngoingRequest?.();

        setCtrlCPressCount((prev) => prev + 1);
        return true;
      } else if (keyMatchers[Command.EXIT](key)) {
        setCtrlDPressCount((prev) => prev + 1);
        return true;
      }

      let enteringConstrainHeightMode = false;
      if (!constrainHeight) {
        enteringConstrainHeightMode = true;
        setConstrainHeight(true);
      }

      if (keyMatchers[Command.SHOW_ERROR_DETAILS](key)) {
        setShowErrorDetails((prev) => !prev);
        return true;
      } else if (keyMatchers[Command.SUSPEND_APP](key)) {
        const undoMessage = isITerm2()
          ? 'Undo has been moved to Option + Z'
          : 'Undo has been moved to Alt/Option + Z or Cmd + Z';
        handleWarning(undoMessage);
        return true;
      } else if (keyMatchers[Command.SHOW_FULL_TODOS](key)) {
        setShowFullTodos((prev) => !prev);
        return true;
      } else if (keyMatchers[Command.TOGGLE_MARKDOWN](key)) {
        setRenderMarkdown((prev) => {
          const newValue = !prev;
          // Force re-render of static content
          refreshStatic();
          return newValue;
        });
        return true;
      } else if (
        keyMatchers[Command.SHOW_IDE_CONTEXT_DETAIL](key) &&
        config.getIdeMode() &&
        ideContextState
      ) {
        // eslint-disable-next-line @typescript-eslint/no-floating-promises
        handleSlashCommand('/ide status');
        return true;
      } else if (
        keyMatchers[Command.SHOW_MORE_LINES](key) &&
        !enteringConstrainHeightMode
      ) {
        setConstrainHeight(false);
        return true;
      } else if (
        (keyMatchers[Command.FOCUS_SHELL_INPUT](key) ||
          keyMatchers[Command.UNFOCUS_BACKGROUND_SHELL_LIST](key)) &&
        (activePtyId || (isBackgroundShellVisible && backgroundShells.size > 0))
      ) {
        if (embeddedShellFocused) {
          const capturedTime = lastOutputTimeRef.current;
          if (tabFocusTimeoutRef.current)
            clearTimeout(tabFocusTimeoutRef.current);
          tabFocusTimeoutRef.current = setTimeout(() => {
            if (lastOutputTimeRef.current === capturedTime) {
              setEmbeddedShellFocused(false);
            } else {
              handleWarning('Use Shift+Tab to unfocus');
            }
          }, 150);
          return false;
        }

        const isIdle = Date.now() - lastOutputTimeRef.current >= 100;

        if (isIdle && !activePtyId && !isBackgroundShellVisible) {
          if (tabFocusTimeoutRef.current)
            clearTimeout(tabFocusTimeoutRef.current);
          toggleBackgroundShell();
          setEmbeddedShellFocused(true);
          if (backgroundShells.size > 1) setIsBackgroundShellListOpen(true);
          return true;
        }

        setEmbeddedShellFocused(true);
        return true;
      } else if (
        keyMatchers[Command.UNFOCUS_SHELL_INPUT](key) ||
        keyMatchers[Command.UNFOCUS_BACKGROUND_SHELL](key)
      ) {
        if (embeddedShellFocused) {
          setEmbeddedShellFocused(false);
          return true;
        }
        return false;
      } else if (keyMatchers[Command.TOGGLE_BACKGROUND_SHELL](key)) {
        if (activePtyId) {
          backgroundCurrentShell();
          // After backgrounding, we explicitly do NOT show or focus the background UI.
        } else {
          toggleBackgroundShell();
          // Toggle focus based on intent: if we were hiding, unfocus; if showing, focus.
          if (!isBackgroundShellVisible && backgroundShells.size > 0) {
            setEmbeddedShellFocused(true);
            if (backgroundShells.size > 1) {
              setIsBackgroundShellListOpen(true);
            }
          } else {
            setEmbeddedShellFocused(false);
          }
        }
        return true;
      } else if (keyMatchers[Command.TOGGLE_BACKGROUND_SHELL_LIST](key)) {
        if (backgroundShells.size > 0 && isBackgroundShellVisible) {
          if (!embeddedShellFocused) {
            setEmbeddedShellFocused(true);
          }
          setIsBackgroundShellListOpen(true);
        }
        return true;
      }
      return false;
    },
    [
      constrainHeight,
      setConstrainHeight,
      setShowErrorDetails,
      config,
      ideContextState,
      setCtrlCPressCount,
      setCtrlDPressCount,
      handleSlashCommand,
      cancelOngoingRequest,
      activePtyId,
      embeddedShellFocused,
      settings.merged.general.debugKeystrokeLogging,
      refreshStatic,
      setCopyModeEnabled,
      copyModeEnabled,
      isAlternateBuffer,
      backgroundCurrentShell,
      toggleBackgroundShell,
      backgroundShells,
      isBackgroundShellVisible,
      setIsBackgroundShellListOpen,
      lastOutputTimeRef,
      tabFocusTimeoutRef,
      handleWarning,
    ],
  );

  useKeypress(handleGlobalKeypress, { isActive: true, priority: true });

  useEffect(() => {
    // Respect hideWindowTitle settings
    if (settings.merged.ui.hideWindowTitle) return;

    const paddedTitle = computeTerminalTitle({
      streamingState,
      thoughtSubject: thought?.subject,
      isConfirming:
        !!commandConfirmationRequest || shouldShowActionRequiredTitle,
      isSilentWorking: shouldShowSilentWorkingTitle,
      folderName: basename(config.getTargetDir()),
      showThoughts: !!settings.merged.ui.showStatusInTitle,
      useDynamicTitle: settings.merged.ui.dynamicWindowTitle,
    });

    // Only update the title if it's different from the last value we set
    if (lastTitleRef.current !== paddedTitle) {
      lastTitleRef.current = paddedTitle;
      stdout.write(`\x1b]0;${paddedTitle}\x07`);
    }
    // Note: We don't need to reset the window title on exit because Gemini CLI is already doing that elsewhere
  }, [
    streamingState,
    thought,
    commandConfirmationRequest,
    shouldShowActionRequiredTitle,
    shouldShowSilentWorkingTitle,
    settings.merged.ui.showStatusInTitle,
    settings.merged.ui.dynamicWindowTitle,
    settings.merged.ui.hideWindowTitle,
    config,
    stdout,
  ]);

  useEffect(() => {
    const handleUserFeedback = (payload: UserFeedbackPayload) => {
      let type: MessageType;
      switch (payload.severity) {
        case 'error':
          type = MessageType.ERROR;
          break;
        case 'warning':
          type = MessageType.WARNING;
          break;
        case 'info':
          type = MessageType.INFO;
          break;
        default:
          throw new Error(
            `Unexpected severity for user feedback: ${payload.severity}`,
          );
      }

      historyManager.addItem(
        {
          type,
          text: payload.message,
        },
        Date.now(),
      );

      // If there is an attached error object, log it to the debug drawer.
      if (payload.error) {
        debugLogger.warn(
          `[Feedback Details for "${payload.message}"]`,
          payload.error,
        );
      }
    };

    coreEvents.on(CoreEvent.UserFeedback, handleUserFeedback);

    // Flush any messages that happened during startup before this component
    // mounted.
    coreEvents.drainBacklogs();

    return () => {
      coreEvents.off(CoreEvent.UserFeedback, handleUserFeedback);
    };
  }, [historyManager]);

  const filteredConsoleMessages = useMemo(() => {
    if (config.getDebugMode()) {
      return consoleMessages;
    }
    return consoleMessages.filter((msg) => msg.type !== 'debug');
  }, [consoleMessages, config]);

  // Computed values
  const errorCount = useMemo(
    () =>
      filteredConsoleMessages
        .filter((msg) => msg.type === 'error')
        .reduce((total, msg) => total + msg.count, 0),
    [filteredConsoleMessages],
  );

  const nightly = props.version.includes('nightly');

  const dialogsVisible =
    shouldShowIdePrompt ||
    isFolderTrustDialogOpen ||
    adminSettingsChanged ||
    !!commandConfirmationRequest ||
    !!authConsentRequest ||
    !!customDialog ||
    confirmUpdateExtensionRequests.length > 0 ||
    !!loopDetectionConfirmationRequest ||
    isThemeDialogOpen ||
    isSettingsDialogOpen ||
    isModelDialogOpen ||
    isAgentConfigDialogOpen ||
    isPermissionsDialogOpen ||
    isAuthenticating ||
    isAuthDialogOpen ||
    isEditorDialogOpen ||
    showPrivacyNotice ||
    showIdeRestartPrompt ||
    !!proQuotaRequest ||
    !!validationRequest ||
    isSessionBrowserOpen ||
    authState === AuthState.AwaitingApiKeyInput ||
    !!newAgents;

  const pendingHistoryItems = useMemo(
    () => [...pendingSlashCommandHistoryItems, ...pendingGeminiHistoryItems],
    [pendingSlashCommandHistoryItems, pendingGeminiHistoryItems],
  );

  const allToolCalls = useMemo(
    () =>
      pendingHistoryItems
        .filter(
          (item): item is HistoryItemToolGroup => item.type === 'tool_group',
        )
        .flatMap((item) => item.tools),
    [pendingHistoryItems],
  );

  const [geminiMdFileCount, setGeminiMdFileCount] = useState<number>(
    config.getGeminiMdFileCount(),
  );
  useEffect(() => {
    const handleMemoryChanged = (result: MemoryChangedPayload) => {
      setGeminiMdFileCount(result.fileCount);
    };
    coreEvents.on(CoreEvent.MemoryChanged, handleMemoryChanged);
    return () => {
      coreEvents.off(CoreEvent.MemoryChanged, handleMemoryChanged);
    };
  }, []);

  useEffect(() => {
    let isMounted = true;

    const fetchBannerTexts = async () => {
      const [defaultBanner, warningBanner] = await Promise.all([
        // TODO: temporarily disabling the banner, it will be re-added.
        '',
        config.getBannerTextCapacityIssues(),
      ]);

      if (isMounted) {
        setDefaultBannerText(defaultBanner);
        setWarningBannerText(warningBanner);
        setBannerVisible(true);
      }
    };
    // eslint-disable-next-line @typescript-eslint/no-floating-promises
    fetchBannerTexts();

    return () => {
      isMounted = false;
    };
  }, [config, refreshStatic]);

  const uiState: UIState = useMemo(
    () => ({
      history: historyManager.history,
      historyManager,
      isThemeDialogOpen,
      themeError,
      isAuthenticating,
      isConfigInitialized,
      authError,
      isAuthDialogOpen,
      isAwaitingApiKeyInput: authState === AuthState.AwaitingApiKeyInput,
      apiKeyDefaultValue,
      editorError,
      isEditorDialogOpen,
      showPrivacyNotice,
      corgiMode,
      debugMessage,
      quittingMessages,
      isSettingsDialogOpen,
      isSessionBrowserOpen,
      isModelDialogOpen,
      isAgentConfigDialogOpen,
      selectedAgentName,
      selectedAgentDisplayName,
      selectedAgentDefinition,
      isPermissionsDialogOpen,
      permissionsDialogProps,
      slashCommands,
      pendingSlashCommandHistoryItems,
      commandContext,
      commandConfirmationRequest,
      authConsentRequest,
      confirmUpdateExtensionRequests,
      loopDetectionConfirmationRequest,
      geminiMdFileCount,
      streamingState,
      initError,
      pendingGeminiHistoryItems,
      thought,
      shellModeActive,
      userMessages: inputHistory,
      buffer,
      inputWidth,
      suggestionsWidth,
      isInputActive,
      isResuming,
      shouldShowIdePrompt,
      isFolderTrustDialogOpen: isFolderTrustDialogOpen ?? false,
      isTrustedFolder,
      constrainHeight,
      showErrorDetails,
      showFullTodos,
      filteredConsoleMessages,
      ideContextState,
      renderMarkdown,
      ctrlCPressedOnce: ctrlCPressCount >= 1,
      ctrlDPressedOnce: ctrlDPressCount >= 1,
      showEscapePrompt,
      shortcutsHelpVisible,
      isFocused,
      elapsedTime,
      currentLoadingPhrase,
      historyRemountKey,
      activeHooks,
      messageQueue,
      queueErrorMessage,
      showApprovalModeIndicator,
      currentModel,
      userTier,
      proQuotaRequest,
      validationRequest,
      contextFileNames,
      errorCount,
      availableTerminalHeight,
      mainAreaWidth,
      staticAreaMaxItemHeight,
      staticExtraHeight,
      dialogsVisible,
      pendingHistoryItems,
      nightly,
      branchName,
      sessionStats,
      terminalWidth,
      terminalHeight,
      mainControlsRef,
      rootUiRef,
      currentIDE,
      updateInfo,
      showIdeRestartPrompt,
      ideTrustRestartReason,
      isRestarting,
      extensionsUpdateState,
      activePtyId,
      backgroundShellCount,
      isBackgroundShellVisible,
      embeddedShellFocused,
      showDebugProfiler,
      customDialog,
      copyModeEnabled,
      warningMessage,
      bannerData,
      bannerVisible,
      terminalBackgroundColor: config.getTerminalBackground(),
      settingsNonce,
      backgroundShells,
      activeBackgroundShellPid,
      backgroundShellHeight,
      isBackgroundShellListOpen,
      adminSettingsChanged,
      newAgents,
    }),
    [
      isThemeDialogOpen,
      themeError,
      isAuthenticating,
      isConfigInitialized,
      authError,
      isAuthDialogOpen,
      editorError,
      isEditorDialogOpen,
      showPrivacyNotice,
      corgiMode,
      debugMessage,
      quittingMessages,
      isSettingsDialogOpen,
      isSessionBrowserOpen,
      isModelDialogOpen,
      isAgentConfigDialogOpen,
      selectedAgentName,
      selectedAgentDisplayName,
      selectedAgentDefinition,
      isPermissionsDialogOpen,
      permissionsDialogProps,
      slashCommands,
      pendingSlashCommandHistoryItems,
      commandContext,
      commandConfirmationRequest,
      authConsentRequest,
      confirmUpdateExtensionRequests,
      loopDetectionConfirmationRequest,
      geminiMdFileCount,
      streamingState,
      initError,
      pendingGeminiHistoryItems,
      thought,
      shellModeActive,
      inputHistory,
      buffer,
      inputWidth,
      suggestionsWidth,
      isInputActive,
      isResuming,
      shouldShowIdePrompt,
      isFolderTrustDialogOpen,
      isTrustedFolder,
      constrainHeight,
      showErrorDetails,
      showFullTodos,
      filteredConsoleMessages,
      ideContextState,
      renderMarkdown,
      ctrlCPressCount,
      ctrlDPressCount,
      showEscapePrompt,
      shortcutsHelpVisible,
      isFocused,
      elapsedTime,
      currentLoadingPhrase,
      historyRemountKey,
      activeHooks,
      messageQueue,
      queueErrorMessage,
      showApprovalModeIndicator,
      userTier,
      proQuotaRequest,
      validationRequest,
      contextFileNames,
      errorCount,
      availableTerminalHeight,
      mainAreaWidth,
      staticAreaMaxItemHeight,
      staticExtraHeight,
      dialogsVisible,
      pendingHistoryItems,
      nightly,
      branchName,
      sessionStats,
      terminalWidth,
      terminalHeight,
      mainControlsRef,
      rootUiRef,
      currentIDE,
      updateInfo,
      showIdeRestartPrompt,
      ideTrustRestartReason,
      isRestarting,
      currentModel,
      extensionsUpdateState,
      activePtyId,
      backgroundShellCount,
      isBackgroundShellVisible,
      historyManager,
      embeddedShellFocused,
      showDebugProfiler,
      customDialog,
      apiKeyDefaultValue,
      authState,
      copyModeEnabled,
      warningMessage,
      bannerData,
      bannerVisible,
      config,
      settingsNonce,
      backgroundShellHeight,
      isBackgroundShellListOpen,
      activeBackgroundShellPid,
      backgroundShells,
      adminSettingsChanged,
      newAgents,
    ],
  );

  const exitPrivacyNotice = useCallback(
    () => setShowPrivacyNotice(false),
    [setShowPrivacyNotice],
  );

  const uiActions: UIActions = useMemo(
    () => ({
      handleThemeSelect,
      closeThemeDialog,
      handleThemeHighlight,
      handleAuthSelect,
      setAuthState,
      onAuthError,
      handleEditorSelect,
      exitEditorDialog,
      exitPrivacyNotice,
      closeSettingsDialog,
      closeModelDialog,
      openAgentConfigDialog,
      closeAgentConfigDialog,
      openPermissionsDialog,
      closePermissionsDialog,
      setShellModeActive,
      vimHandleInput,
      handleIdePromptComplete,
      handleFolderTrustSelect,
      setConstrainHeight,
      onEscapePromptChange: handleEscapePromptChange,
      refreshStatic,
      handleFinalSubmit,
      handleClearScreen,
      handleProQuotaChoice,
      handleValidationChoice,
      openSessionBrowser,
      closeSessionBrowser,
      handleResumeSession,
      handleDeleteSession,
      setQueueErrorMessage,
      popAllMessages,
      handleApiKeySubmit,
      handleApiKeyCancel,
      setBannerVisible,
      setShortcutsHelpVisible,
      handleWarning,
      setEmbeddedShellFocused,
      dismissBackgroundShell,
      setActiveBackgroundShellPid,
      setIsBackgroundShellListOpen,
      setAuthContext,
      handleRestart: async () => {
        if (process.send) {
          const remoteSettings = config.getRemoteAdminSettings();
          if (remoteSettings) {
            process.send({
              type: 'admin-settings-update',
              settings: remoteSettings,
            });
          }
        }
        await runExitCleanup();
        process.exit(RELAUNCH_EXIT_CODE);
      },
      handleNewAgentsSelect: async (choice: NewAgentsChoice) => {
        if (newAgents && choice === NewAgentsChoice.ACKNOWLEDGE) {
          const registry = config.getAgentRegistry();
          try {
            await Promise.all(
              newAgents.map((agent) => registry.acknowledgeAgent(agent)),
            );
          } catch (error) {
            debugLogger.error('Failed to acknowledge agents:', error);
            historyManager.addItem(
              {
                type: MessageType.ERROR,
                text: `Failed to acknowledge agents: ${getErrorMessage(error)}`,
              },
              Date.now(),
            );
          }
        }
        setNewAgents(null);
      },
    }),
    [
      handleThemeSelect,
      closeThemeDialog,
      handleThemeHighlight,
      handleAuthSelect,
      setAuthState,
      onAuthError,
      handleEditorSelect,
      exitEditorDialog,
      exitPrivacyNotice,
      closeSettingsDialog,
      closeModelDialog,
      openAgentConfigDialog,
      closeAgentConfigDialog,
      openPermissionsDialog,
      closePermissionsDialog,
      setShellModeActive,
      vimHandleInput,
      handleIdePromptComplete,
      handleFolderTrustSelect,
      setConstrainHeight,
      handleEscapePromptChange,
      refreshStatic,
      handleFinalSubmit,
      handleClearScreen,
      handleProQuotaChoice,
      handleValidationChoice,
      openSessionBrowser,
      closeSessionBrowser,
      handleResumeSession,
      handleDeleteSession,
      setQueueErrorMessage,
      popAllMessages,
      handleApiKeySubmit,
      handleApiKeyCancel,
      setBannerVisible,
      setShortcutsHelpVisible,
      handleWarning,
      setEmbeddedShellFocused,
      dismissBackgroundShell,
      setActiveBackgroundShellPid,
      setIsBackgroundShellListOpen,
      setAuthContext,
      newAgents,
      config,
      historyManager,
    ],
  );

  if (authState === AuthState.AwaitingGoogleLoginRestart) {
    return (
      <LoginWithGoogleRestartDialog
        onDismiss={() => {
          setAuthContext({});
          setAuthState(AuthState.Updating);
        }}
        config={config}
      />
    );
  }

  return (
    <UIStateContext.Provider value={uiState}>
      <UIActionsContext.Provider value={uiActions}>
        <ConfigContext.Provider value={config}>
          <AppContext.Provider
            value={{
              version: props.version,
              startupWarnings: props.startupWarnings || [],
            }}
          >
            <ToolActionsProvider config={config} toolCalls={allToolCalls}>
              <ShellFocusContext.Provider value={isFocused}>
                <App />
              </ShellFocusContext.Provider>
            </ToolActionsProvider>
          </AppContext.Provider>
        </ConfigContext.Provider>
      </UIActionsContext.Provider>
    </UIStateContext.Provider>
  );
};