export interface CartItem {
  id?: string;
  billingInterval?: 'one_time' | 'monthly';
  billingType?: 'purchase' | 'subscription';
  selections: any;
  moduleQuantities?: Record<string, number>;
}

export function splitCart(items: CartItem[]) {
  const purchaseItems = items.filter(
    item => item.billingInterval === 'one_time' || item.billingType === 'purchase'
  );
  const subscriptionItems = items.filter(
    item => item.billingInterval === 'monthly' || item.billingType === 'subscription'
  );
  return { purchaseItems, subscriptionItems };
}