const db = require('./backend/db-sqlite');
async function fix() {
  const fixes = [
    // Purchase requests
    "ALTER TABLE purchase_requests ADD COLUMN request_date TEXT DEFAULT ''",
    // Products
    "ALTER TABLE products ADD COLUMN remark TEXT DEFAULT ''",
    // Payment plans - make purchase_order_id nullable
    // Can't alter NOT NULL in SQLite, so we'll handle it in the route
    // Customers - the is_default might be queried from wrong table
    // Let's check the actual customers table schema
  ];
  
  for (const sql of fixes) {
    try { await db.query(sql); console.log('OK:', sql.substring(0, 80)); }
    catch(e) { 
      const msg = e.message || '';
      if (msg.includes('duplicate') || msg.includes('already exists')) {
        console.log('SKIP:', sql.substring(0, 80));
      } else {
        console.log('ERR:', msg.substring(0, 100));
      }
    }
  }
  
  // Check customers table schema
  try {
    const schema = await db.query("PRAGMA table_info(customers)");
    console.log('\nCustomers columns:', schema.rows.map(r => r.name).join(', '));
  } catch(e) { console.log('ERR:', e.message); }
  
  // Check payment_plans schema
  try {
    const schema = await db.query("PRAGMA table_info(payment_plans)");
    console.log('Payment plans columns:', schema.rows.map(r => `${r.name}[${r.notnull?'NOT NULL':'NULL'}]`).join(', '));
  } catch(e) { console.log('ERR:', e.message); }
  
  process.exit();
}
fix();