import { z } from 'zod';
import type { RuntimeAPIs } from '@/lib/api/types';
import { getInjectedBootOutcome } from '@/lib/desktopBoot';
import { getRuntimeApiBaseUrl, getRuntimeKey } from '@/lib/runtime-switch';
import { getRegisteredRuntimeAPIs } from '@/contexts/runtimeAPIRegistry';
import { isVSCodeBootstrapPresent } from '@/lib/vscodeBootstrap';

export type UpdateInfo = {
  available: boolean;
  version?: string;
  currentVersion: string;
  body?: string;
  date?: string;
  releaseUrl?: string;
  downloadUrl?: string;
  nextSuggestedCheckInSec?: number;
  // Web-specific fields
  packageManager?: string;
  updateCommand?: string;
};

export type UpdateProgress = {
  downloaded: number;
  total?: number;
};

export type { SkillCatalogConfig } from '@/lib/settings/parsers';

export type DesktopWindowControlsPosition = 'left' | 'right';
export type DesktopWindowControlsSide = 'left' | 'right';
export type DesktopWindowControlAction = 'close' | 'minimize' | 'maximize';
// No fixed-width constant: control width depends on the style (classic vs traffic-lights).
export type DesktopWindowControlsStyle = 'classic' | 'traffic-lights';

// The settings document is defined once, in the registry, and re-exported here
// so the many existing importers keep their path.
export type { DesktopSettings } from '@/lib/settings/registry';

type DesktopBridgeGlobal = {
  invoke?: (cmd: string, args?: Record<string, unknown>) => Promise<unknown>;
  openDialog?: (options: Record<string, unknown>) => Promise<unknown>;
  grantFileAccess?: (path: string) => Promise<unknown>;
  openExternal?: (url: string) => Promise<unknown>;
  listen?: (
    event: string,
    handler: (evt: { payload?: unknown }) => void,
  ) => Promise<() => void>;
};

type ElectronRuntimeGlobal = {
  runtime?: string;
  arch?: string;
  trayEnabled?: boolean;
};

const getElectronRuntime = (): ElectronRuntimeGlobal | null => {
  if (typeof window === 'undefined') return null;
  return (window as unknown as { __OPENCHAMBER_ELECTRON__?: ElectronRuntimeGlobal }).__OPENCHAMBER_ELECTRON__ ?? null;
};

const getDesktopBridge = (): DesktopBridgeGlobal | null => {
  if (typeof window === 'undefined') return null;
  return (window as unknown as { __OPENCHAMBER_DESKTOP__?: DesktopBridgeGlobal }).__OPENCHAMBER_DESKTOP__ ?? null;
};

export const isElectronShell = (): boolean => getElectronRuntime()?.runtime === 'electron';

const getElectronPlatform = (): string | null => {
  if (typeof window === 'undefined') return null;
  const platform = (window as unknown as { __OPENCHAMBER_PLATFORM__?: string }).__OPENCHAMBER_PLATFORM__;
  return typeof platform === 'string' ? platform : null;
};

/** Default side for in-app window controls (Windows-style, right). */
export const DEFAULT_DESKTOP_WINDOW_CONTROLS_POSITION: DesktopWindowControlsPosition = 'right';

/** Windows and Linux use frameless windows with in-app minimize/maximize/close controls. */
export const usesFramelessElectronChrome = (): boolean => {
  if (!isElectronShell()) return false;
  const platform = getElectronPlatform();
  return platform === 'win32' || platform === 'linux';
};

/** Normalize a stored preference; legacy `auto` maps to the right-side default. */
export const normalizeDesktopWindowControlsPosition = (
  value: unknown,
): DesktopWindowControlsPosition | undefined => {
  if (value === 'left' || value === 'right') {
    return value;
  }
  // Legacy "auto" never read OS chrome config; treat it as the right default.
  if (value === 'auto') {
    return DEFAULT_DESKTOP_WINDOW_CONTROLS_POSITION;
  }
  return undefined;
};

export const resolveDesktopWindowControlsSide = (
  preference: DesktopWindowControlsPosition | undefined,
): DesktopWindowControlsSide => {
  return preference === 'left' ? 'left' : DEFAULT_DESKTOP_WINDOW_CONTROLS_POSITION;
};

/**
 * Left matches macOS traffic-light order (close, minimize, maximize).
 * Right keeps Windows order (minimize, maximize, close).
 */
export const getDesktopWindowControlsOrder = (
  side: DesktopWindowControlsSide,
): DesktopWindowControlAction[] => {
  return side === 'left'
    ? ['close', 'minimize', 'maximize']
    : ['minimize', 'maximize', 'close'];
};

export const hasDesktopInvoke = (): boolean => {
  return typeof getDesktopBridge()?.invoke === 'function';
};

export const canUseElectronDesktopIPC = (): boolean => isElectronShell() && hasDesktopInvoke();

export const invokeDesktop = async <T = unknown>(command: string, args?: Record<string, unknown>): Promise<T | null> => {
  const bridge = getDesktopBridge();
  if (typeof bridge?.invoke !== 'function') return null;
  return bridge.invoke(command, args ?? {}) as Promise<T>;
};

type LaunchAtLoginStatus = {
  supported: boolean;
  enabled: boolean;
};

type KeepAwakeStatus = {
  supported: boolean;
  enabled: boolean;
  active: boolean;
};

type MinimizeToTrayStatus = {
  supported: boolean;
  enabled: boolean;
};

export const getDesktopLaunchAtLogin = async (): Promise<LaunchAtLoginStatus | null> => {
  if (!canUseElectronDesktopIPC() || !isDesktopLocalOriginActive()) {
    return null;
  }

  try {
    const result = await invokeDesktop<LaunchAtLoginStatus>('desktop_get_launch_at_login');
    if (!result || typeof result.supported !== 'boolean' || typeof result.enabled !== 'boolean') {
      return null;
    }
    return result;
  } catch (error) {
    console.warn('Failed to get launch at login status', error);
    return null;
  }
};

export const setDesktopLaunchAtLogin = async (enabled: boolean): Promise<LaunchAtLoginStatus | null> => {
  if (!canUseElectronDesktopIPC() || !isDesktopLocalOriginActive()) {
    return null;
  }

  try {
    const result = await invokeDesktop<LaunchAtLoginStatus>('desktop_set_launch_at_login', { enabled });
    if (!result || typeof result.supported !== 'boolean' || typeof result.enabled !== 'boolean') {
      return null;
    }
    return result;
  } catch (error) {
    console.warn('Failed to set launch at login status', error);
    return null;
  }
};

export const getDesktopMinimizeToTray = async (): Promise<MinimizeToTrayStatus | null> => {
  if (!canUseElectronDesktopIPC() || !isDesktopLocalOriginActive()) {
    return null;
  }

  try {
    const result = await invokeDesktop<MinimizeToTrayStatus>('desktop_get_minimize_to_tray');
    if (!result || typeof result.supported !== 'boolean' || typeof result.enabled !== 'boolean') {
      return null;
    }
    return result;
  } catch (error) {
    console.warn('Failed to get minimize to tray status', error);
    return null;
  }
};

export const setDesktopMinimizeToTray = async (enabled: boolean): Promise<MinimizeToTrayStatus | null> => {
  if (!canUseElectronDesktopIPC() || !isDesktopLocalOriginActive()) {
    return null;
  }

  try {
    const result = await invokeDesktop<MinimizeToTrayStatus>('desktop_set_minimize_to_tray', { enabled });
    if (!result || typeof result.supported !== 'boolean' || typeof result.enabled !== 'boolean') {
      return null;
    }
    return result;
  } catch (error) {
    console.warn('Failed to set minimize to tray status', error);
    return null;
  }
};

export const getDesktopKeepAwake = async (): Promise<KeepAwakeStatus | null> => {
  if (!canUseElectronDesktopIPC() || !isDesktopLocalOriginActive()) {
    return null;
  }

  try {
    const result = await invokeDesktop<KeepAwakeStatus>('desktop_get_keep_awake');
    if (!result || typeof result.supported !== 'boolean' || typeof result.enabled !== 'boolean' || typeof result.active !== 'boolean') {
      return null;
    }
    return result;
  } catch (error) {
    console.warn('Failed to get keep awake status', error);
    return null;
  }
};

export const setDesktopKeepAwake = async (enabled: boolean): Promise<KeepAwakeStatus | null> => {
  if (!canUseElectronDesktopIPC() || !isDesktopLocalOriginActive()) {
    return null;
  }

  try {
    const result = await invokeDesktop<KeepAwakeStatus>('desktop_set_keep_awake', { enabled });
    if (!result || typeof result.supported !== 'boolean' || typeof result.enabled !== 'boolean' || typeof result.active !== 'boolean') {
      return null;
    }
    return result;
  } catch (error) {
    console.warn('Failed to set keep awake status', error);
    return null;
  }
};

const normalizeOrigin = (raw: string): string | null => {
  const trimmed = raw.trim();
  if (!trimmed) return null;
  try {
    return new URL(trimmed).origin;
  } catch {
    try {
      return new URL(trimmed.endsWith('/') ? trimmed : `${trimmed}/`).origin;
    } catch {
      return null;
    }
  }
};

const parseUrl = (raw: string): URL | null => {
  const trimmed = raw.trim();
  if (!trimmed) return null;
  try {
    return new URL(trimmed);
  } catch {
    try {
      return new URL(trimmed.endsWith('/') ? trimmed : `${trimmed}/`);
    } catch {
      return null;
    }
  }
};

const normalizeHost = (rawHost: string): string => rawHost.replace(/^\[|\]$/g, '').toLowerCase();

const isLoopbackHost = (host: string): boolean => {
  const normalized = normalizeHost(host);
  return normalized === 'localhost' || normalized === '127.0.0.1' || normalized === '::1';
};

export const isDesktopLocalOriginActive = (): boolean => {
  if (typeof window === 'undefined') return false;
  if (!isDesktopShell()) return false;

  if (getRuntimeKey() === 'local') {
    return true;
  }

  const local = typeof window.__OPENCHAMBER_LOCAL_ORIGIN__ === 'string' ? window.__OPENCHAMBER_LOCAL_ORIGIN__ : '';
  const localUrl = parseUrl(local);
  const runtimeApiUrl = parseUrl(getRuntimeApiBaseUrl());

  if (!runtimeApiUrl && localUrl && getInjectedBootOutcome()?.target === 'local') {
    return true;
  }

  if (localUrl && runtimeApiUrl) {
    if (localUrl.origin === runtimeApiUrl.origin) {
      return true;
    }

    const localPort = localUrl.port || (localUrl.protocol === 'https:' ? '443' : '80');
    const runtimePort = runtimeApiUrl.port || (runtimeApiUrl.protocol === 'https:' ? '443' : '80');

    return (
      localUrl.protocol === runtimeApiUrl.protocol &&
      localPort === runtimePort &&
      isLoopbackHost(localUrl.hostname) &&
      isLoopbackHost(runtimeApiUrl.hostname)
    );
  }

  const currentUrl = parseUrl(window.location.origin);

  if (localUrl && currentUrl) {
    if (localUrl.origin === currentUrl.origin) {
      return true;
    }

    const localPort = localUrl.port || (localUrl.protocol === 'https:' ? '443' : '80');
    const currentPort = currentUrl.port || (currentUrl.protocol === 'https:' ? '443' : '80');

    return (
      localUrl.protocol === currentUrl.protocol &&
      localPort === currentPort &&
      isLoopbackHost(localUrl.hostname) &&
      isLoopbackHost(currentUrl.hostname)
    );
  }

  const localOrigin = normalizeOrigin(local);
  const currentOrigin = normalizeOrigin(window.location.origin) || window.location.origin;
  if (localOrigin && currentOrigin && localOrigin === currentOrigin) {
    return true;
  }

  return Boolean(currentUrl && isLoopbackHost(currentUrl.hostname));
};

export const isDesktopShell = (): boolean => {
  if (typeof window === 'undefined') return false;
  return isElectronShell();
};

/**
 * Raises the desktop window.
 *
 * Used when work finishes somewhere the app cannot be reached from — an MCP
 * authorization completing in the system browser, for instance. Browsers will
 * not follow a custom-protocol link back without a user gesture, so the app
 * brings itself forward instead of asking the page to do it.
 */
export const focusDesktopWindow = async (): Promise<boolean> => {
  if (!isDesktopShell()) return false;
  try {
    return Boolean(await invokeDesktop('desktop_focus_window'));
  } catch {
    return false;
  }
};

export const canRequestNativeDirectoryAccess = (): boolean => (
  isDesktopShell() && hasDesktopInvoke() && isDesktopLocalOriginActive()
);

export const startDesktopWindowDrag = async (): Promise<boolean> => {
  if (!isDesktopShell()) {
    return false;
  }

  try {
    await invokeDesktop('desktop_start_window_drag');
    return true;
  } catch {
    return false;
  }
};

export const isVSCodeRuntime = (): boolean => {
  // Prefer extension-host bootstrap config: it is injected in webview HTML
  // before any store module evaluates, so startup does not depend on
  // RuntimeAPIs registration order (see #2359).
  if (isVSCodeBootstrapPresent()) {
    return true;
  }
  const apis = getRegisteredRuntimeAPIs();
  return apis?.runtime?.isVSCode === true;
};

export const isWebRuntime = (): boolean => {
  const apis = getRegisteredRuntimeAPIs();
  const platform = apis?.runtime?.platform;
  if (platform === 'web') {
    return true;
  }
  if (platform === 'desktop' || platform === 'vscode') {
    return false;
  }
  // Default: anything that's not VSCode behaves like web (HTTP UI).
  return !isVSCodeRuntime();
};

/**
 * Electron reuses the web RuntimeAPIs implementation, so distinguish a browser
 * client from an Electron renderer with both the runtime descriptor and shell.
 */
export const isBrowserClientRuntime = (
  platform: RuntimeAPIs['runtime']['platform'],
  desktopShell = isDesktopShell(),
): boolean => platform === 'web' && !desktopShell;

export const getDesktopHomeDirectory = async (): Promise<string | null> => {
  if (typeof window !== 'undefined') {
    const embedded = window.__OPENCHAMBER_HOME__;
    if (embedded && embedded.length > 0) {
      return embedded;
    }
  }

  return null;
};

export const requestDirectoryAccess = async (
  directoryPath: string
): Promise<{ success: boolean; path?: string; projectId?: string; error?: string }> => {
  // Desktop shell on local instance: use native folder picker.
  if (canRequestNativeDirectoryAccess()) {
    try {
      const selected = await getDesktopBridge()?.openDialog?.({
        directory: true,
        multiple: false,
        title: 'Select Working Directory',
        ...(directoryPath ? { defaultPath: directoryPath } : {}),
      });
      if (!selected || typeof selected !== 'string') {
        return { success: false, error: 'Directory selection cancelled' };
      }
      return { success: true, path: selected };
    } catch (error) {
      console.warn('Failed to request directory access', error);
      return { success: false, error: error instanceof Error ? error.message : String(error) };
    }
  }

  return { success: false, error: 'Native directory picker not available' };
};

const isDesktopFileGrantResult = (
  value: unknown
): value is { path?: unknown; outsideFileGrant?: unknown } => (
  value !== null && typeof value === 'object' && !Array.isArray(value)
);

const desktopExistingFileGrantSchema = z.object({
  path: z.string().min(1),
  outsideFileGrant: z.string().min(1),
  expiresAt: z.number().finite(),
});

export const requestFileAccess = async (
  options?: { filters?: Array<{ name: string; extensions: string[] }>; defaultPath?: string }
): Promise<{ success: boolean; path?: string; outsideFileGrant?: string; error?: string }> => {
  if (hasDesktopInvoke() && isDesktopLocalOriginActive()) {
    try {
      const selected = await getDesktopBridge()?.openDialog?.({
        directory: false,
        multiple: false,
        title: 'Select File',
        returnGrant: true,
        ...(options?.filters ? { filters: options.filters } : {}),
        ...(options?.defaultPath ? { defaultPath: options.defaultPath } : {}),
      });
      if (!selected) {
        return { success: false, error: 'File selection cancelled' };
      }
      if (typeof selected === 'string') {
        return { success: true, path: selected };
      }
      if (!isDesktopFileGrantResult(selected)) {
        return { success: false, error: 'File selection cancelled' };
      }
      const path = typeof selected.path === 'string' ? selected.path : '';
      if (!path) {
        return { success: false, error: 'File selection cancelled' };
      }
      return {
        success: true,
        path,
        outsideFileGrant: typeof selected.outsideFileGrant === 'string' ? selected.outsideFileGrant : undefined,
      };
    } catch (error) {
      console.warn('Failed to request file access', error);
      return { success: false, error: error instanceof Error ? error.message : String(error) };
    }
  }

  return { success: false, error: 'Native file picker not available' };
};

export const requestExistingFileAccess = async (
  path: string
): Promise<
  | { success: true; path: string; outsideFileGrant: string; expiresAt: number }
  | { success: false; error: string }
> => {
  const targetPath = typeof path === 'string' ? path.trim() : '';
  if (!targetPath) {
    return { success: false, error: 'Path is required' };
  }
  if (!hasDesktopInvoke() || !isDesktopLocalOriginActive()) {
    return { success: false, error: 'Native file access not available' };
  }

  try {
    const selected = await getDesktopBridge()?.grantFileAccess?.(targetPath);
    const parsed = desktopExistingFileGrantSchema.safeParse(selected);
    if (!parsed.success) {
      return { success: false, error: 'File access was not granted' };
    }
    return {
      success: true,
      ...parsed.data,
    };
  } catch (error) {
    console.warn('Failed to request existing file access', error);
    return { success: false, error: error instanceof Error ? error.message : String(error) };
  }
};

export const startAccessingDirectory = async (
  directoryPath: string
): Promise<{ success: boolean; error?: string }> => {
  void directoryPath;
  return { success: true };
};

export const stopAccessingDirectory = async (
  directoryPath: string
): Promise<{ success: boolean; error?: string }> => {
  void directoryPath;
  return { success: true };
};

export const checkForDesktopUpdates = async (): Promise<UpdateInfo | null> => {
  if (!hasDesktopInvoke()) {
    return null;
  }

  // Propagate updater capability / feed errors so the UI can show actionable
  // messages (missing AppImage, read-only path, network failure). Missing
  // latest-linux*.yml is already normalized to available:false in main.
  const info = await invokeDesktop<UpdateInfo>('desktop_check_for_updates');
  return info as UpdateInfo;
};

export const downloadDesktopUpdate = async (
  onProgress?: (progress: UpdateProgress) => void
): Promise<boolean> => {
  if (!hasDesktopInvoke()) {
    return false;
  }

  const bridge = getDesktopBridge();
  let unlisten: null | (() => void | Promise<void>) = null;
  let downloaded = 0;
  let total: number | undefined;

  try {
    if (typeof onProgress === 'function' && bridge?.listen) {
      unlisten = await bridge.listen('openchamber:update-progress', (evt) => {
        const payload = evt?.payload;
        if (!payload || typeof payload !== 'object') return;
        const data = payload as { event?: unknown; data?: unknown };
        const eventName = typeof data.event === 'string' ? data.event : null;
        const eventData = data.data && typeof data.data === 'object' ? (data.data as Record<string, unknown>) : null;

        if (eventName === 'Started') {
          downloaded = 0;
          total = typeof eventData?.contentLength === 'number' ? (eventData.contentLength as number) : undefined;
          onProgress({ downloaded, total });
          return;
        }

        if (eventName === 'Progress') {
          const d = eventData?.downloaded;
          const t = eventData?.total;
          if (typeof d === 'number') downloaded = d;
          if (typeof t === 'number') total = t;
          onProgress({ downloaded, total });
          return;
        }

        if (eventName === 'Finished') {
          onProgress({ downloaded, total });
        }
      });
    }

    await invokeDesktop('desktop_download_and_install_update');
    return true;
  } catch (error) {
    // Propagate actionable updater capability / install errors to the UI store.
    throw error instanceof Error ? error : new Error(String(error));
  } finally {
    if (unlisten) {
      try {
        const result = unlisten();
        if (result instanceof Promise) {
          await result;
        }
      } catch {
        // ignored
      }
    }
  }
};

export const restartToApplyUpdate = async (): Promise<boolean> => {
  if (!hasDesktopInvoke()) {
    return false;
  }

  // Unlike a plain restart, an install failure (rejected signature, disabled
  // updater session) must reach the update dialog instead of being reduced to
  // a boolean the caller cannot explain.
  await invokeDesktop('desktop_restart');
  return true;
};

export const restartDesktopApp = async (): Promise<boolean> => {
  if (!hasDesktopInvoke()) {
    return false;
  }

  try {
    await invokeDesktop('desktop_restart');
    return true;
  } catch (error) {
    console.warn('Failed to restart desktop app', error);
    return false;
  }
};

export const getDesktopLanAddress = async (): Promise<string | null> => {
  if (!hasDesktopInvoke() || !isDesktopLocalOriginActive()) {
    return null;
  }

  try {
    const result = await invokeDesktop<string>('desktop_get_lan_address');
    return typeof result === 'string' && result.trim().length > 0 ? result.trim() : null;
  } catch (error) {
    console.warn('Failed to get desktop LAN address', error);
    return null;
  }
};

export const openDesktopPath = async (path: string, app?: string | null): Promise<boolean> => {
  if (!hasDesktopInvoke() || !isDesktopLocalOriginActive()) {
    return false;
  }

  const trimmed = path?.trim();
  if (!trimmed) {
    return false;
  }

  try {
    await invokeDesktop('desktop_open_path', {
      path: trimmed,
      app: typeof app === 'string' && app.trim().length > 0 ? app.trim() : undefined,
    });
    return true;
  } catch (error) {
    console.warn('Failed to open path', error);
    return false;
  }
};

export const revealDesktopPath = async (path: string): Promise<boolean> => {
  if (!hasDesktopInvoke() || !isDesktopLocalOriginActive()) {
    return false;
  }

  const trimmed = path?.trim();
  if (!trimmed) {
    return false;
  }

  try {
    await invokeDesktop('desktop_reveal_path', {
      path: trimmed,
    });
    return true;
  } catch {
    return openDesktopPath(trimmed);
  }
};

export const saveDesktopMarkdownFile = async (
  defaultFileName: string,
  content: string,
): Promise<string | null> => {
  if (!hasDesktopInvoke() || !isDesktopLocalOriginActive()) {
    return null;
  }

  const trimmedFileName = defaultFileName?.trim();
  if (!trimmedFileName) {
    return null;
  }

  try {
    const result = await invokeDesktop<string>('desktop_save_markdown_file', {
      defaultFileName: trimmedFileName,
      content,
    });
    return typeof result === 'string' && result.trim().length > 0 ? result : null;
  } catch (error) {
    console.warn('Failed to save markdown file', error);
    return null;
  }
};

export const openDesktopProjectInApp = async (
  projectPath: string,
  appId: string,
  appName: string,
): Promise<boolean> => {
  if (!hasDesktopInvoke() || !isDesktopLocalOriginActive()) {
    return false;
  }

  const trimmedProjectPath = projectPath?.trim();
  const trimmedAppId = appId?.trim();
  const trimmedAppName = appName?.trim();

  if (!trimmedProjectPath || !trimmedAppId || !trimmedAppName) {
    return false;
  }

  try {
    await invokeDesktop('desktop_open_in_app', {
      projectPath: trimmedProjectPath,
      appId: trimmedAppId,
      appName: trimmedAppName,
    });
    return true;
  } catch (error) {
    console.warn('Failed to open project in app', error);
    return false;
  }
};

export const openDesktopFileInApp = async (
  filePath: string,
  appId: string,
  appName: string,
): Promise<boolean> => {
  if (!hasDesktopInvoke() || !isDesktopLocalOriginActive()) {
    return false;
  }

  const trimmedFilePath = filePath?.trim();
  const trimmedAppId = appId?.trim();
  const trimmedAppName = appName?.trim();

  if (!trimmedFilePath || !trimmedAppId || !trimmedAppName) {
    return false;
  }

  try {
    await invokeDesktop('desktop_open_file_in_app', {
      filePath: trimmedFilePath,
      appId: trimmedAppId,
      appName: trimmedAppName,
    });
    return true;
  } catch (error) {
    console.warn('Failed to open file in app', error);
    return false;
  }
};

export type InstalledDesktopAppInfo = {
  name: string;
  iconDataUrl?: string | null;
};

export type FetchDesktopInstalledAppsResult = {
  apps: InstalledDesktopAppInfo[];
  success: boolean;
  hasCache: boolean;
  isCacheStale: boolean;
};

export const fetchDesktopInstalledApps = async (
  apps: string[],
  force?: boolean
): Promise<FetchDesktopInstalledAppsResult> => {
  if (!hasDesktopInvoke() || !isDesktopLocalOriginActive()) {
    return { apps: [], success: false, hasCache: false, isCacheStale: false };
  }

  const candidate = Array.isArray(apps) ? apps.filter((value) => typeof value === 'string') : [];
  if (candidate.length === 0) {
    return { apps: [], success: true, hasCache: false, isCacheStale: false };
  }

  try {
    const result = await invokeDesktop<unknown>('desktop_get_installed_apps', {
      apps: candidate,
      force: force === true ? true : undefined,
    });
    if (!result || typeof result !== 'object') {
      return { apps: [], success: false, hasCache: false, isCacheStale: false };
    }
    const payload = result as { apps?: unknown; hasCache?: unknown; isCacheStale?: unknown; supported?: unknown };
    if (payload.supported === false) {
      return { apps: [], success: true, hasCache: false, isCacheStale: false };
    }
    if (!Array.isArray(payload.apps)) {
      return { apps: [], success: false, hasCache: false, isCacheStale: false };
    }
    const installedApps = payload.apps
      .filter((entry) => entry && typeof entry === 'object')
      .map((entry) => {
        const record = entry as { name?: unknown; iconDataUrl?: unknown };
        return {
          name: typeof record.name === 'string' ? record.name : '',
          iconDataUrl: typeof record.iconDataUrl === 'string' ? record.iconDataUrl : null,
        };
      })
      .filter((entry) => entry.name.length > 0);
    return {
      apps: installedApps,
      success: true,
      hasCache: payload.hasCache === true,
      isCacheStale: payload.isCacheStale === true,
    };
  } catch (error) {
    console.warn('Failed to fetch installed apps', error);
    return { apps: [], success: false, hasCache: false, isCacheStale: false };
  }
};