const { pool } = require('./src/db');

(async () => {
  console.log('Cleaning junk entries from casinos table...\n');

  // Step 1: Delete rows whose name matches exact known junk patterns
  var toDeletePatterns = [
    '', 'menu', 'nav', 'home', 'login', 'signup', 'register', 'account',
    'support', 'help', 'contact us', 'about us', 'terms', 'privacy policy',
    'top online casinos review list',
    'gambleaware', 'casino bonus codes not working',
    'free spins no deposit', 'welcome bonus',
    'crypto casino', 'bitcoin', 'best online casinos'
  ];

  for (const pattern of toDeletePatterns) {
    try {
      const r = await pool.query(
        "DELETE FROM casinos WHERE LOWER(TRIM(casino_name)) = $1",
        [pattern.toLowerCase()]
      );
      if (r.rowCount > 0) {
        console.log('  Deleted', r.rowCount, 'matching:', JSON.stringify(pattern));
      }
    } catch(e) {}
  }

  // Step 2: Delete rows where name matches LIKE patterns for junk text
  var likePatterns = [
    '%casino bonus codes not working%   ',
    '%online casinos & casino sites',
    'dmca%',
    'crypto bonus%',
    '%willkommenspaket%',
    'lizenz und spielerschutz bei exclusive casino',
    'krypto bonus bis%',
    '%deposit match up to%',
    '%bonus und freispiele%',
    '%exclusive bonuses%',
    '%casino reps%',
    '%casino bonus codes%',
    'get bonus%',
    'visit%casino%'
  ];

  for (const pat of likePatterns) {
    try {
      const r = await pool.query(
        "DELETE FROM casinos WHERE LOWER(casino_name) LIKE $1",
        [pat.toLowerCase()]
      );
      if (r.rowCount > 0) {
        console.log('  Deleted', r.rowCount, 'matching:', JSON.stringify(pat));
      }
    } catch(e) {}
  }

  // Step 3: Delete rows where name looks like phone numbers or prices or is too long
  await pool.query(
    "DELETE FROM casinos WHERE casino_name ~* '^\\d+\\s?\\d+' OR LOWER(casino_name) LIKE '%trustpilot%' OR LENGTH(casino_name) > 100"
  );

  // Step 4: Delete rows starting with symbols/emoji/special chars (not real brand names)  
  await pool.query(
    'DELETE FROM casinos WHERE casino_name ~* \'^[\\+\\-\\>\\.]+\' OR casino_name ~ \'^\\\\s+$\''
  );

  // Count what remains per crawl  
  const countResult = await pool.query(
    "SELECT c.id, c.site_name, COUNT(*) as cnt FROM crawls c LEFT JOIN casinos ca ON ca.crawl_id = c.id GROUP BY c.id, c.site_name ORDER BY c.id DESC LIMIT 30"
  );

  console.log('\n=== Remaining entries per recent crawl ===');  
  for (const row of countResult.rows) {
    const name = row.site_name || '[failed]';
    console.log('Crawl#', String(row.id).padEnd(4), '|', name.padEnd(25), '|', row.cnt, 'entries saved');
  }

  // Show sample of kept names after cleanup  
  const keptNames = await pool.query(
    "SELECT DISTINCT casino_name FROM casinos WHERE LENGTH(TRIM(casino_name)) > 3 ORDER BY casino_name LIMIT 100"
  );

  console.log('\n=== Sample of valid names remaining in DB ===');
  for (const row of keptNames.rows) {
    const n = row.casino_name;
    if (!n || !/[a-zA-Z]/.test(n[0])) continue; // skip remaining junk  
    console.log(' ', n);
  }

  await pool.end();
})();