import { PAGINATION_DEFAULT_LIMIT, PAGINATION_MAX_LIMIT } from "../config.ts";

/**
 * Parses page/limit query parameters with sensible defaults and bounds.
 * page: clamped to [1, ∞)
 * limit: clamped to [1, 100], defaults to 20
 */
export function parsePagination(
  params: URLSearchParams,
  defaultLimit = PAGINATION_DEFAULT_LIMIT,
): { page: number; limit: number } {
  const page = Math.max(
    1,
    parseInt(params.get("page") ?? "1") || 1,
  );
  const limit = Math.min(
    Math.max(
      1,
      parseInt(params.get("limit") ?? String(defaultLimit)) || defaultLimit,
    ),
    PAGINATION_MAX_LIMIT,
  );
  return { page, limit };
}