import { HexString } from '@gear-js/api';

import { DEFAULT_LIMIT } from '@/shared/config';
import { fetchWithGuard } from '@/shared/helpers';

import { Dns, DnsParams, DnsResponse } from './types';
import { DNS_API_URL } from './consts';

const getDnsProgramId = async () => {
  const url = `${DNS_API_URL}/dns/contract`;
  const method = 'GET';

  return (await fetchWithGuard<{ contract: HexString }>(url, { method })).contract;
};

const getDns = (params: DnsParams) => {
  const method = 'GET';
  const url = new URL(`${DNS_API_URL}/dns`);
  Object.entries(params).forEach(([key, value]) => url.searchParams.append(key, String(value)));
  return fetchWithGuard<DnsResponse>(url.toString(), { method });
};

const getSingleDns = (name: string) => {
  const method = 'GET';
  const url = new URL(`${DNS_API_URL}/dns/by_name/${name}`);
  return fetchWithGuard<Dns>(url.toString(), { method });
};

const getNextPageParam = (lastPage: DnsResponse, allPages: DnsResponse[]) => {
  const totalCount = lastPage.count;
  const lastPageCount = lastPage.data.length;
  const fetchedCount = (allPages.length - 1) * DEFAULT_LIMIT + lastPageCount;

  return fetchedCount < totalCount ? fetchedCount : undefined;
};

export { getDnsProgramId, getDns, getSingleDns, getNextPageParam };