import { BigNumber } from './big-number.utilities';
import { BaseInvoice, InvoiceItem, Vat } from '../models';
/**
 * Provides functionality around calculating invoices/prices.
 */
export declare abstract class InvoiceCalcUtilities {
    /**
     * Gets the total price of an item before tax.
     * @param item - The invoice item to get the price from.
     * @returns The amount of the item times its price.
     */
    static getItemTotalPriceBeforeTax(item: InvoiceItem): BigNumber;
    /**
     * Gets the total price of an item after tax.
     * @param item - The invoice item to get the price from.
     * @returns The total price before tax times 1 + tax/100.
     */
    static getItemTotalPriceAfterTax(item: InvoiceItem): BigNumber;
    /**
     * Gets the total tax for the given item.
     * @param item - The item to get the total tax from.
     * @returns The total price before tax times tax/100.
     */
    static getItemTotalTax(item: InvoiceItem): BigNumber;
    /**
     * Gets the total price of an invoice before tax.
     * @param invoice - The invoice to get the price from.
     * @returns The addition of the total price before tax of all items in the invoice. If this would be negative this returns 0.
     */
    static getTotalBeforeTax<Invoice extends BaseInvoice>(invoice: Invoice): BigNumber;
    /**
     * Gets the total price of an invoice after tax.
     * @param invoice - The invoice to get the price from.
     * @returns The addition of the total price before tax and the total tax of the invoice.
     */
    static getTotalAfterTax<Invoice extends BaseInvoice>(invoice: Invoice): BigNumber;
    /**
     * Gets the total tax of the invoice.
     * @param invoice - The invoice to get the total tax from.
     * @returns The addition of the tax of all items of the invoice.
     */
    static getTotalTax<Invoice extends BaseInvoice>(invoice: Invoice): BigNumber;
    /**
     * Gets the total tax for a specific tax group (eg. 19%).
     * @param invoice - The invoice to get the total tax from.
     * @param group - The tax group for which the total tax should be calculated.
     * @param groupOnlyByRate - Whether or not VAT groups are only determined by rate and not by category code.
     * @returns The addition of the tax of all items that are in the provided tax group.
     */
    static getTotalTaxForTaxGroup<Invoice extends BaseInvoice>(invoice: Invoice, group: Vat, groupOnlyByRate: boolean): BigNumber;
    /**
     * Gets the total price of an invoice before tax.
     * @param invoice - The invoice to get the price from.
     * @param group - The tax group to get the total before from.
     * @param groupOnlyByRate - Whether or not VAT groups are only determined by rate and not by category code.
     * @returns The addition of the total price before tax of all items in the invoice. If this would be negative this returns 0.
     */
    static getTotalBeforeTaxForTaxGroup<Invoice extends BaseInvoice>(invoice: Invoice, group: Vat, groupOnlyByRate: boolean): BigNumber;
    private static getItemsForTaxGroup;
}