import { useMemo } from 'react';
import type { LucideIcon } from 'lucide-react';
import {
  Bot,
  CalendarDays,
  Cpu,
  Globe,
  KeyRound,
  LayoutGrid,
  Lock,
  Mail,
  ScanText,
  ShieldCheck,
  Sparkles,
  User,
  Users,
  Volume2,
  Wrench,
} from 'lucide-react';
import { usePermissions } from 'hooks/usePermissions';
import { useTranslation, type AppTranslationKey } from '@/lib/i18n';
import { useDockItems } from '../Dock';

// What Spotlight can take you to.
//
// ── It indexes the DOCK, rather than a list of its own ──
//
// The dock is already the composed, permission-filtered answer to "what can this account open here":
// the shell's own screens, plus whatever installed plugins contribute, minus anything `canVisit` refuses.
// Building a second list would mean two answers to one question, and the second would be wrong the day
// somebody installs a plugin — which is the whole failure the dock's own comment warns about, arrived at
// from a third direction.
//
// So a new plugin appears in Spotlight for the same reason it appears in the dock: because it is
// installed. Nothing here is edited.
//
// Settings sections are added because they are the things people hunt for and the dock deliberately does
// not carry. They are static: a settings screen is shell, not a plugin.

export type SpotlightItem = {
  /** Stable across renders — used as the React key and for the recency store. */
  id: string;
  /** Resolved for the active locale, because `rank()` matches what the reader can actually see. */
  label: string;
  /** Where it goes. Matched against `canVisit` for anything not already filtered. */
  to: string;
  /** Shown small beside the label, so two "Profile"s are distinguishable. */
  hint?: string;
  icon?: LucideIcon;
  /** Plugin artwork, when the tile has some. */
  image?: string;
  color?: string;
  /**
   * Copied from the dock tile, and it has to be.
   *
   * `bare` means the artwork brings its own frame — calendar, contacts, and every plugin shipping a logo.
   * Dropping it here painted a coloured swatch behind those logos, which the dock's own comment calls out
   * as reading like a mistake. It was dropped, so Spotlight looked like a different app's list of the same
   * things.
   */
  tile?: 'badge' | 'bare';
};

/**
 * The settings sections, which the dock does not carry.
 *
 * Hand-listed rather than derived, and that is a real cost: a section added to `IntegrationsSettings`
 * will not appear here until someone adds it. The alternative is exporting every settings screen's
 * section array up into the shell, which couples five screens to this one to save five lines.
 *
 * IT DRIFTED, and within two days. The first version listed nine rows against a settings area that has
 * twenty-one, missed Languages and Voice entirely, pointed `/settings/users` at a route that does not
 * exist (it is `/settings/user-management/users`), and gave four different rows the same User glyph —
 * which is most of why the whole panel read as a generic list rather than as the app's own.
 *
 * So the cost is now measured rather than predicted, and deriving these from the screens is the fix if it
 * happens a third time. Each group below names the file it is copied from, so checking is one grep.
 *
 * `hint` is what makes them findable — typing "keys" should reach the API keys screen, and the label alone
 * does not say where it lives.
 */
type SettingsItem = Omit<SpotlightItem, 'label' | 'hint'> & {
  labelKey: AppTranslationKey;
  hintKey?: AppTranslationKey;
};

const SETTINGS_ITEMS: SettingsItem[] = [
  // Profile — ProfileSettings/index.tsx
  {
    id: 'set:profile',
    labelKey: 'settings.sections.profile.label',
    to: '/settings/profile',
    hintKey: 'settings.sections.profile.hint',
    icon: User,
  },
  {
    id: 'set:password',
    labelKey: 'settings.sections.changePassword.label',
    to: '/settings/profile/change-password',
    icon: Lock,
  },
  {
    id: 'set:api-keys',
    labelKey: 'settings.sections.apiKeys.label',
    to: '/settings/profile/api-keys',
    hintKey: 'settings.sections.apiKeys.hint',
    icon: KeyRound,
  },
  {
    id: 'set:languages',
    labelKey: 'settings.sections.languages.label',
    to: '/settings/profile/languages',
    hintKey: 'settings.sections.languages.hint',
    icon: Globe,
  },
  {
    id: 'set:voice',
    labelKey: 'settings.sections.voice.label',
    to: '/settings/profile/voice',
    hintKey: 'settings.sections.voice.hint',
    icon: Volume2,
  },
  {
    id: 'set:dock',
    labelKey: 'settings.sections.dock.label',
    to: '/settings/profile/dock',
    hintKey: 'settings.sections.dock.hint',
    icon: LayoutGrid,
  },
  // AI — AISettings.tsx
  {
    id: 'set:ai-my-models',
    labelKey: 'settings.sections.myModels.label',
    to: '/settings/ai/my-models',
    icon: Sparkles,
  },
  {
    id: 'set:ai-channel-models',
    labelKey: 'settings.sections.channelModels.label',
    to: '/settings/ai/member-models',
    icon: Sparkles,
  },
  {
    id: 'set:ai-default-models',
    labelKey: 'settings.sections.defaultModels.label',
    to: '/settings/ai/default-models',
    icon: Sparkles,
  },
  {
    id: 'set:ai-harnesses',
    labelKey: 'settings.sections.providers.label',
    to: '/settings/ai/ai-harnesses',
    hintKey: 'settings.sections.providers.hint',
    icon: Bot,
  },
  // System — SystemSettings.tsx
  { id: 'set:tts', labelKey: 'settings.sections.tts.label', to: '/settings/system/tts', icon: Volume2 },
  { id: 'set:ocr', labelKey: 'settings.sections.ocr.label', to: '/settings/system/ocr', icon: ScanText },
  {
    id: 'set:maintenance',
    labelKey: 'settings.sections.maintenance.label',
    to: '/settings/system/maintenance',
    hintKey: 'settings.sections.maintenance.hint',
    icon: Cpu,
  },
  {
    id: 'set:smtp',
    labelKey: 'settings.sections.smtp.label',
    to: '/settings/system/smtp',
    hintKey: 'settings.sections.smtp.hint',
    icon: Mail,
  },
  // Integrations — IntegrationsSettings
  {
    id: 'set:google-oauth',
    labelKey: 'settings.sections.googleOauth.label',
    to: '/settings/integrations/google-oauth',
    icon: KeyRound,
  },
  { id: 'set:apify', labelKey: 'settings.sections.apify.label', to: '/settings/integrations/apify', icon: Wrench },
  // DAV sync setup left with the caldav plugin on 2026-08-27 — it is a modal on the Calendar screen now,
  // and Spotlight has no way to open a plugin's modal. `bun run docs:check` caught this one: it compares
  // every settings route Spotlight offers against the sections that actually exist.
  // Users — UserManagement
  {
    id: 'set:users',
    labelKey: 'settings.sections.accounts.label',
    to: '/settings/user-management/users',
    hintKey: 'settings.sections.accounts.hint',
    icon: Users,
  },
  {
    id: 'set:permissions',
    labelKey: 'settings.sections.permissions.label',
    to: '/settings/user-management/permissions',
    icon: ShieldCheck,
  },
];

/** Everything Spotlight can offer this account, in a stable order. */
export function useSpotlightItems(): SpotlightItem[] {
  const { canVisit, plugins } = usePermissions();
  const { t } = useTranslation();
  const dockItems = useDockItems(plugins);

  return useMemo(() => {
    const fromDock: SpotlightItem[] = dockItems
      .filter((item) => canVisit(item.to))
      .map((item) => ({
        id: `nav:${item.to}`,
        label: item.label,
        to: item.to,
        icon: item.icon,
        image: item.image,
        color: item.color,
        tile: item.tile,
      }));

    // Settings go through `canVisit` too. `usePermissions` fails OPEN by design — hiding a door is a
    // courtesy and the 403 is the lock — so this cannot lock anyone out of their own settings.
    const settings: SpotlightItem[] = SETTINGS_ITEMS.filter((item) => canVisit(item.to)).map(
      ({ labelKey, hintKey, ...item }) => ({
        ...item,
        label: t(labelKey),
        ...(hintKey ? { hint: t(hintKey) } : {}),
      }),
    );

    return [...fromDock, ...settings];
  }, [canVisit, dockItems, t]);
}