import { z } from 'zod';

export interface Pagination {
  max_id?: string;
  min_id?: string;
  since?: number;
  until?: number;
  limit: number;
  offset: number;
}

/** Schema to parse pagination query params. */
export const paginationSchema: z.ZodType<Pagination> = z.object({
  max_id: z.string().transform((val) => {
    if (!val.includes('-')) return val;
    return val.split('-')[1];
  }).optional().catch(undefined),
  min_id: z.string().optional().catch(undefined),
  since: z.coerce.number().nonnegative().optional().catch(undefined),
  until: z.coerce.number().nonnegative().optional().catch(undefined),
  limit: z.coerce.number().catch(20).transform((value) => Math.min(Math.max(value, 0), 40)),
  offset: z.coerce.number().nonnegative().catch(0),
}) as z.ZodType<Pagination>;