import { Pool } from 'pg';

async function getColumns(pool: Pool, table: string) {
  const result = await pool.query(
    `SELECT column_name, data_type FROM information_schema.columns WHERE table_name = $1 ORDER BY ordinal_position`,
    [table]
  );
  return result.rows;
}

async function run() {
  const nas = new Pool({ connectionString: 'postgresql://postgres:postgres@192.168.0.145:5434/nearestmass' });
  const neon = new Pool({
    connectionString: 'postgresql://neondb_owner:npg_sX8dxFg9KZIR@ep-plain-sky-ah15xa97-pooler.c-3.us-east-1.aws.neon.tech/neondb?sslmode=require',
    ssl: { rejectUnauthorized: false },
  });

  for (const table of ['churches', 'mass_schedules', 'confession_schedules', 'adoration_schedules']) {
    const nasCols = await getColumns(nas, table);
    const neonCols = await getColumns(neon, table);

    const nasNames = new Set(nasCols.map((c) => c.column_name));
    const neonNames = new Set(neonCols.map((c) => c.column_name));

    const onlyNas = nasCols.filter((c) => !neonNames.has(c.column_name));
    const onlyNeon = neonCols.filter((c) => !nasNames.has(c.column_name));

    if (onlyNas.length > 0 || onlyNeon.length > 0) {
      console.log(`\n=== ${table} ===`);
      if (onlyNas.length) {
        console.log('  NAS only:');
        for (const c of onlyNas) console.log(`    - ${c.column_name} (${c.data_type})`);
      }
      if (onlyNeon.length) {
        console.log('  Neon only:');
        for (const c of onlyNeon) console.log(`    - ${c.column_name} (${c.data_type})`);
      }
    } else {
      console.log(`\n=== ${table} === (schemas match)`);
    }
  }

  await nas.end();
  await neon.end();
}

run();