const { Client } = require('pg');
const client = new Client('postgres://postgres:csh%402018@localhost:5432/ai_pharmacy');

client.connect().then(async () => {
  const query = `
    SELECT 
      d.id as dispensing_id,
      COALESCE(pat.full_name, d.subject_ref) as patient_name,
      d.total_amount,
      json_agg(
        json_build_object(
          'batch_no', sm.batch_no,
          'qty', ABS(sm.qty_delta),
          'brand_name', p.brand_name
        )
      ) as items
    FROM dispensing_records d
    LEFT JOIN patients pat ON pat.hospital_patient_id = d.subject_ref OR pat.id::text = d.subject_ref
    JOIN stock_movements sm ON sm.reference_id = d.id
    JOIN batches b ON b.batch_no = sm.batch_no
    JOIN products p ON p.id = b.product_id
    WHERE d.tenant_id = 'usr_1785482612908'
    GROUP BY d.id, pat.full_name
    ORDER BY d.created_at DESC
    LIMIT 5
  `;
  const res = await client.query(query);
  console.log(JSON.stringify(res.rows, null, 2));
  process.exit(0);
}).catch(console.error);