const { data: invoice } = await clinik.invoices.create({
  status: 'issued',
  patientId: 'pt_abc123',
  type: 'professional-services',
  issuerId: 'org_clinic456',
  date: '2024-03-15',
  lineItem: [
    {
      sequence: 1,
      chargeItemCode: '99213',
      priceComponent: [
        { type: 'base', amount: { value: 150.00, currency: 'USD' } },
      ],
    },
    {
      sequence: 2,
      chargeItemCode: '85025',
      priceComponent: [
        { type: 'base', amount: { value: 45.00, currency: 'USD' } },
      ],
    },
  ],
  totalNet: { value: 195.00, currency: 'USD' },
  totalGross: { value: 195.00, currency: 'USD' },
  paymentTerms: 'Net 30',
});

const { data: draft } = await clinik.invoices.create({
  status: 'draft',
  patientId: 'pt_abc123',
  type: 'facility-charges',
  lineItem: [
    {
      sequence: 1,
      chargeItemCode: 'room-charge-semi-private',
      priceComponent: [
        { type: 'base', amount: { value: 1200.00, currency: 'USD' } },
      ],
    },
  ],
  totalGross: { value: 1200.00, currency: 'USD' },
});

// Issue the invoice when ready
await clinik.invoices.update(draft.id, { status: 'issued' });

await clinik.invoices.update('inv_abc123', {
  status: 'cancelled',
  cancelledReason: 'Duplicate invoice — services already billed under INV-2024-001',
});

// All invoices for a patient
const { data } = await clinik.invoices.search({
  patientId: 'pt_abc123',
});

// Filter by status and date range
const { data: issued } = await clinik.invoices.search({
  status: 'issued',
  dateFrom: '2024-01-01',
  dateTo: '2024-03-31',
});

// Filter by issuer
const { data: byClinic } = await clinik.invoices.search({
  issuerId: 'org_clinic456',
  status: 'balanced',
});