import type { PageSearchParams } from '#web-runtime/types';

export function requestedPage(searchParams?: PageSearchParams): number {
  const raw = searchParams?.['page'];
  const value = Number.parseInt(Array.isArray(raw) ? (raw[0] ?? '') : (raw ?? ''), 10);
  return Number.isNaN(value) || value < 1 ? 1 : value;
}

export function pagerPages(current: number, lastPage: number): number[] {
  const pages = new Set<number>([1, lastPage]);
  for (let page = current - 1; page <= current + 1; page++) {
    if (page >= 1 && page <= lastPage) pages.add(page);
  }
  return [...pages].sort((left, right) => left - right);
}