/**
 * @file settingsSearch — the Settings page's search: `SETTINGS_INDEX` names the
 * rows each section holds (as i18n keys, resolved at render), and
 * `rankSettings` scores sections against a query. Per field, exact beats
 * prefix beats substring: section title 900/850/800, entry title 700/650/600,
 * description 500/450/400, keywords 300/250/200; a section scores its best hit.
 * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 */

export interface SettingsEntry {
  section: string;
  title: string;
  description?: string;
  keywords?: string[];
  /** The section's own title (scored in the top tier). */
  sectionTitle?: boolean;
}

/** One searchable row per section, by i18n key in the `settings` namespace. A
 *  section whose id starts with `agents/` and is not listed here is a catalog
 *  tool's page and takes the `agents/*` entries. */
export const SETTINGS_INDEX: {
  section: string;
  titleKey: string;
  descKey?: string;
  keywords?: string[];
}[] = [
  { section: "general", titleKey: "lanesSection.title", descKey: "lanesSection.description" },
  { section: "general", titleKey: "lanesSection.runHousekeeping" },
  { section: "general", titleKey: "import.title", keywords: ["history", "transcripts"] },
  { section: "general", titleKey: "remoteSources.title", keywords: ["ssh", "machines"] },
  { section: "general", titleKey: "sagi.title", descKey: "sagi.description" },
  { section: "general", titleKey: "data.title", descKey: "data.description" },
  { section: "general", titleKey: "danger.title", keywords: ["clear", "delete", "export"] },
  { section: "general", titleKey: "about.title", keywords: ["version", "server", "database"] },
  { section: "appearance", titleKey: "appearance.mode", keywords: ["dark", "light", "system"] },
  { section: "appearance", titleKey: "appearance.darkThemes", keywords: ["theme", "colors"] },
  { section: "appearance", titleKey: "appearance.lightThemes" },
  { section: "notifications", titleKey: "notifications.enable", keywords: ["push", "browser"] },
  { section: "notifications", titleKey: "notifications.awaitingInput" },
  { section: "notifications", titleKey: "notifications.turnComplete" },
  { section: "notifications", titleKey: "alertsHub.title", descKey: "alertsHub.description" },
  { section: "notifications", titleKey: "webhooks.title", keywords: ["slack", "discord"] },
  {
    section: "agents",
    titleKey: "aiTools.title",
    descKey: "aiTools.description",
    keywords: ["install", "update", "default"],
  },
  { section: "agents/claude-code", titleKey: "pricing.title", keywords: ["cost", "price"] },
  { section: "agents/claude-code", titleKey: "hooks.title" },
  { section: "agents/claude-code", titleKey: "claudeHome.title", keywords: ["profiles"] },
  { section: "agents/codex", titleKey: "pricing.title", keywords: ["cost", "price"] },
  { section: "agents/codex", titleKey: "codexHooks.title" },
  { section: "agents/codex", titleKey: "codexHome.title" },
  { section: "agents/*", titleKey: "toolTab.defaultModel", keywords: ["model", "config"] },
  { section: "ai-router", titleKey: "aiRouter.title", keywords: ["proxy", "endpoint", "key"] },
  { section: "pricing", titleKey: "pricing.title", keywords: ["cost", "price", "tokens"] },
  { section: "git-credentials", titleKey: "gitCreds.title", keywords: ["login", "token"] },
  { section: "worktrees", titleKey: "worktrees.showUntracked", keywords: ["hide", "sidebar"] },
  { section: "worktrees", titleKey: "worktrees.claude" },
  { section: "worktrees", titleKey: "worktrees.agenthub" },
];

function tier(hay: string | undefined, q: string, exact: number): number {
  if (!hay) return 0;
  const h = hay.toLowerCase();
  if (h === q) return exact;
  if (h.startsWith(q)) return exact - 50;
  if (h.includes(q)) return exact - 100;
  return 0;
}

/** Sections matching `query`, best first; ties keep the entries' order. */
export function rankSettings(
  query: string,
  entries: SettingsEntry[]
): { section: string; score: number }[] {
  const q = query.trim().toLowerCase();
  if (!q) return [];
  const best = new Map<string, number>();
  for (const e of entries) {
    const score = Math.max(
      tier(e.title, q, e.sectionTitle ? 900 : 700),
      tier(e.description, q, 500),
      ...(e.keywords ?? []).map((k) => tier(k, q, 300))
    );
    if (score > (best.get(e.section) ?? 0)) best.set(e.section, score);
  }
  return [...best]
    .map(([section, score]) => ({ section, score }))
    .sort((a, b) => b.score - a.score);
}