import Fuse from "fuse.js";
import type { IconEntry } from "./icons";

let fuseInstance: Fuse<IconEntry> | null = null;
let cachedIcons: IconEntry[] | null = null;

export function getSearchIndex(icons: IconEntry[]): Fuse<IconEntry> {
  if (fuseInstance && cachedIcons === icons) return fuseInstance;
  fuseInstance = new Fuse(icons, {
    keys: [
      { name: "title", weight: 3 },
      { name: "slug", weight: 2 },
      { name: "aliases", weight: 1.5 },
      { name: "categories", weight: 1 },
    ],
    threshold: 0.3,
    includeScore: true,
    minMatchCharLength: 2,
  });
  cachedIcons = icons;
  return fuseInstance;
}

export function searchIcons(
  icons: IconEntry[],
  query: string
): IconEntry[] {
  if (!query.trim()) return icons;
  const fuse = getSearchIndex(icons);
  return fuse.search(query).map((r) => r.item);
}