// @ts-check
const path = require('path');
const { compareAndWriteFile } = require('./lib/string-array-compare');
const { withBannerArray } = require('./lib/with-banner');
const { minifyRules } = require('./lib/minify-rules');
const { fetchRemoteTextAndCreateReadlineInterface, readFileByLine } = require('./lib/fetch-remote-text-by-line');
const Trie = require('./lib/trie');
const { surgeRulesetToClashClassicalTextRuleset } = require('./lib/clash');

(async () => {
  console.time('Total Time - build-cdn-conf');

  const trie = new Trie();
  for await (const line of await fetchRemoteTextAndCreateReadlineInterface('https://publicsuffix.org/list/public_suffix_list.dat')) {
    trie.add(line);
  }

  /**
   * Extract OSS domain from publicsuffix list
   * @type {Set<string>}
   */
  const S3OSSDomains = new Set();

  trie.find('.amazonaws.com')
    .filter(line => (line.startsWith('s3-') || line.startsWith('s3.')) && !line.includes('cn-'))
    .forEach(line => S3OSSDomains.add(line));

  trie.find('.scw.cloud')
    .filter(line => (line.startsWith('s3-') || line.startsWith('s3.')) && !line.includes('cn-'))
    .forEach(line => S3OSSDomains.add(line));

  /** @type {string[]} */
  const cdnDomainsList = [];
  for await (const line of readFileByLine(path.resolve(__dirname, '../Source/non_ip/cdn.conf'))) {
    if (line === '# --- [AWS S3 Replace Me] ---') {
      S3OSSDomains.forEach(domain => cdnDomainsList.push(`DOMAIN-SUFFIX,${domain}`));
    } else {
      cdnDomainsList.push(line);
    }
  }

  const description = [
    'License: AGPL 3.0',
    'Homepage: https://ruleset.skk.moe',
    'GitHub: https://github.com/SukkaW/Surge',
    '',
    'This file contains object storage and static assets CDN domains.'
  ];
  const ruleset = minifyRules(cdnDomainsList);

  await Promise.all([
    compareAndWriteFile(
      withBannerArray(
        'Sukka\'s Ruleset - CDN Domains',
        description,
        new Date(),
        ruleset
      ),
      path.resolve(__dirname, '../List/non_ip/cdn.conf')
    ),
    compareAndWriteFile(
      withBannerArray(
        'Sukka\'s Ruleset - CDN Domains',
        description,
        new Date(),
        surgeRulesetToClashClassicalTextRuleset(ruleset)
      ),
      path.resolve(__dirname, '../Clash/non_ip/cdn.txt')
    )
  ]);

  console.timeEnd('Total Time - build-cdn-conf');
})();