import { createReadlineInterfaceFromResponse } from './fetch-text-by-line';

import type { UndiciResponseData } from './fetch-retry';
import type { Response } from 'undici';

export function extractDomainsFromFelixDnsmasq(line: string): string | null {
  if (line.startsWith('server=/') && line.endsWith('/114.114.114.114')) {
    return line.slice(8, -16);
  }
  return null;
}

export async function parseFelixDnsmasqFromResp(resp: UndiciResponseData | Response): Promise<string[]> {
  const results: string[] = [];

  for await (const line of createReadlineInterfaceFromResponse(resp, true)) {
    const domain = extractDomainsFromFelixDnsmasq(line);
    if (domain) {
      results.push(domain);
    }
  }

  return results;
}