/**
 * Trust-filter levels + filtering helper. Kept out of TrustFilter.tsx so that
 * component file exports only a component (React Fast Refresh).
 */

export type TrustFilterLevel = 'all' | 'verified' | 'trusted' | 'following';

/**
 * Filter items by the web-of-trust score of their author.
 * `verified` ≥ 90, `trusted` ≥ 60, `following` is the top of the source's graph.
 */
export function filterByTrustLevel<T extends { pubkey: string }>(
  items: T[],
  level: TrustFilterLevel,
  getTrustScore: (pubkey: string) => number | undefined,
): T[] {
  if (level === 'all') return items;

  return items.filter((item) => {
    const score = getTrustScore(item.pubkey);
    if (score === undefined) return false;

    switch (level) {
      case 'verified':
        return score >= 90;
      case 'trusted':
        return score >= 60;
      case 'following':
        return score === 90 || score === 100;
      default:
        return true;
    }
  });
}