import Worktank from 'worktank';

import { processHostsWithPreload } from './parse-filter/hosts';
import { processDomainListsWithPreload } from './parse-filter/domainlists';
import { dummySpan, printTraceResult } from '../trace';
import type { Span } from '../trace';
import { appendArrayInPlaceCurried } from './append-array-in-place';
import { PHISHING_DOMAIN_LISTS_EXTRA, PHISHING_HOSTS_EXTRA } from '../constants/reject-data-source';

const downloads = [
  ...PHISHING_DOMAIN_LISTS_EXTRA.map(entry => processDomainListsWithPreload(...entry)),
  ...PHISHING_HOSTS_EXTRA.map(entry => processHostsWithPreload(...entry))
];

const pool = new Worktank({
  name: 'process-phishing-domains',
  size: 1,
  timeout: 10000, // The maximum number of milliseconds to wait for the result from the worker, if exceeded the worker is terminated and the execution promise rejects
  warmup: true,
  autoterminate: 30000, // The interval of milliseconds at which to check if the pool can be automatically terminated, to free up resources, workers will be spawned up again if needed
  env: {},
  methods: {
    // eslint-disable-next-line object-shorthand -- workertank
    processPhihsingDomains: async function (
      domainArr: string[],
      importMetaUrl: string,
      /** require.main === module */ isDebug = false
    ): Promise<string[]> {
      // TODO: createRequire is a temporary workaround for https://github.com/nodejs/node/issues/51956
      const { default: module } = await import('node:module');
      const __require = module.createRequire(importMetaUrl);

      const picocolors = __require('picocolors') as typeof import('picocolors');
      const tldts = __require('tldts-experimental') as typeof import('tldts-experimental');

      const { loosTldOptWithPrivateDomains } = __require('../constants/loose-tldts-opt') as typeof import('../constants/loose-tldts-opt');
      const { BLACK_TLD, WHITELIST_MAIN_DOMAINS, leathalKeywords, lowKeywords, sensitiveKeywords } = __require('../constants/phishing-score-source') as typeof import('../constants/phishing-score-source');

      const domainCountMap = new Map<string, number>();
      const domainScoreMap: Record<string, number> = {};

      let line = '';
      let tld: string | null = '';
      let apexDomain: string | null = '';
      let subdomain: string | null = '';

      // const set = new Set<string>();
      // let duplicateCount = 0;

      for (let i = 0, len = domainArr.length; i < len; i++) {
        line = domainArr[i];

        // if (set.has(line)) {
        //   duplicateCount++;
        // } else {
        //   set.add(line);
        // }

        const parsed = tldts.parse(line, loosTldOptWithPrivateDomains);
        if (parsed.isPrivate) {
          continue;
        }

        tld = parsed.publicSuffix;
        apexDomain = parsed.domain;

        if (!tld) {
          console.log(picocolors.yellow('[phishing domains] E0001'), 'missing tld', { line, tld });
          continue;
        }
        if (!apexDomain) {
          console.log(picocolors.yellow('[phishing domains] E0002'), 'missing domain', { line, apexDomain });
          continue;
        }

        domainCountMap.set(
          apexDomain,
          domainCountMap.has(apexDomain)
            ? domainCountMap.get(apexDomain)! + 1
            : 1
        );

        if (!(apexDomain in domainScoreMap)) {
          domainScoreMap[apexDomain] = 0;
          if (BLACK_TLD.has(tld)) {
            domainScoreMap[apexDomain] += 3;
          } else if (tld.length > 6) {
            domainScoreMap[apexDomain] += 2;
          }
          if (apexDomain.length >= 18) {
            domainScoreMap[apexDomain] += 0.5;
          }
        }

        subdomain = parsed.subdomain;

        if (
          subdomain
          && !WHITELIST_MAIN_DOMAINS.has(apexDomain)
        ) {
          domainScoreMap[apexDomain] += calcDomainAbuseScore(subdomain, line);
        }
      }

      domainCountMap.forEach((count, apexDomain) => {
        if (
        // !WHITELIST_MAIN_DOMAINS.has(apexDomain)
          (domainScoreMap[apexDomain] >= 24)
          || (domainScoreMap[apexDomain] >= 16 && count >= 7)
          || (domainScoreMap[apexDomain] >= 13 && count >= 11)
          || (domainScoreMap[apexDomain] >= 5 && count >= 14)
          || (domainScoreMap[apexDomain] >= 3 && count >= 21)
          || (domainScoreMap[apexDomain] >= 1 && count >= 60)
        ) {
          domainArr.push('.' + apexDomain);
        }
      });

      if (isDebug) {
        console.log({
          v: 1,
          score: domainScoreMap['com-ticketry.world'],
          count: domainCountMap.get('com-ticketry.world'),
          domainArrLen: domainArr.length
        });
      }

      return domainArr;

      function calcDomainAbuseScore(subdomain: string, fullDomain: string = subdomain) {
        if (leathalKeywords(fullDomain)) {
          return 100;
        }

        let weight = 0;

        const hitLowKeywords = lowKeywords(fullDomain);
        const sensitiveKeywordsHit = sensitiveKeywords(fullDomain);

        if (sensitiveKeywordsHit) {
          weight += 15;
          if (hitLowKeywords) {
            weight += 10;
          }
        } else if (hitLowKeywords) {
          weight += 2;
        }

        const subdomainLength = subdomain.length;

        if (subdomainLength > 6) {
          weight += 0.015;

          if (subdomainLength > 13) {
            weight += 0.2;
            if (subdomainLength > 20) {
              weight += 1;
              if (subdomainLength > 30) {
                weight += 5;
                if (subdomainLength > 40) {
                  weight += 10;
                }
              }
            }

            if (subdomain.indexOf('.', 1) > 1) {
              weight += 1;
            }
          }
        }

        return weight;
      }
    }
  }
});

export function getPhishingDomains(parentSpan: Span) {
  return parentSpan.traceChild('get phishing domains').traceAsyncFn(async (span) => {
    const domainArr = await span.traceChildAsync('download/parse/merge phishing domains', async (curSpan) => {
      const domainArr: string[] = [];

      const domainGroups = await Promise.all(downloads.map(task => task(curSpan)));
      domainGroups.forEach(appendArrayInPlaceCurried(domainArr));

      return domainArr;
    });

    return span.traceChildAsync(
      'process phishing domain set',
      async () => {
        const phishingDomains = await pool.exec(
          'processPhihsingDomains',
          [
            domainArr,
            import.meta.url,
            require.main === module
          ]
        );
        pool.terminate();
        return phishingDomains;
      }
    );
  });
}

if (require.main === module) {
  getPhishingDomains(dummySpan)
    .catch(console.error)
    .finally(() => {
      dummySpan.stop();
      printTraceResult(dummySpan.traceResult);
    });
}