/**
 * @deprecated Use `ApplyRecordDiscountAndTaxes` from `shareneus`
 * (src/accounting/discounts/record-discount.ts), which does everything this does.
 * Kept only until MainUI's callers migrate; delete it then.
 *
 * On migration: call `ApplyRecordDiscountAndTaxes(recordData, { TaxCodes: taxcodes })`
 * and use `.Record` where this return value was used. `isTaxable` is dropped --
 * it was never read. What changes for the caller:
 * - `RecDisc` shares now sum exactly to the header amount, and match what the
 *   server verifies to the paisa. This function's float split does not.
 * - Line order is kept; this function moves every `NoDisc` line to the end.
 * - A stale `RecDisc` on a `NoDisc` or return line is cleared to 0.
 * - A line discount above its amount, or a header discount above what remains,
 *   comes back in `.Issues` with the record unchanged, instead of negative shares.
 * - The input is not mutated, and no `net`/`Perc`/`LPerc`/`PPerc` fields are added.
 */
export declare function DiscountAndTaxCalculation(recordData: any, isTaxable: boolean, taxcodes?: any): any;
/**
* @deprecated Use `CalculateRecordDiscountForLine` from `shareneus`
* (src/accounting/discounts/record-discount.ts). Kept only until MainUI's callers
* migrate; delete it then.
*
* On migration: pass the line in its stored shape (`{ _id, Qty, UnPr, Disc, NoDisc }`,
* or `Pr` for a service line) with group `"ITEM"` or `"SERVICE"`, and read `.RecDisc`.
* Ids are now compared as text: this function compares with ===, so an ObjectId
* never matches a string id and it silently returns the LAST line's share.
*
* Calculates the record-level discount amount (RecDisc) for a single line.
*
* @param invoiceData  Full invoice data containing Items, Ops and discount fields.
* @param currentLine  Normalised data for the line being edited.
* @param lineType     'item' for parts/inventory lines, 'op' for service/labor lines.
*/
export declare function calculateRecordDiscountForLine(invoiceData: any, currentLine: {
    _id: any;
    noDisc: boolean;
    /** Item-only: quantity */
    qty?: number;
    /** Item-only: unit price */
    unpr?: number;
    /** Op-only: gross amount */
    amt?: number;
    disc: number;
}, lineType: 'item' | 'op'): number;