import type { CalculatedExpression } from '../interfaces';
import type { QuestionnaireItem } from 'fhir/r4';
import type { ValidateCodeResponse } from '../interfaces/valueSet.interface';
/**
 * Validates if a value represents a quantity with a unit enclosed in single quotes,
 * supporting escaped single quotes within the unit.
 *
 * @param input - The value to validate.
 * @returns {boolean} Returns true if the input matches the pattern: a number followed by a space and a unit enclosed in single quotes, (allowing escaped single quotes); otherwise, false.
 */
export declare function isQuantityString(input: unknown): input is string;
interface UcumQuantityPromise {
    numericValueString: string;
    promise: Promise<ValidateCodeResponse | null>;
}
/**
 * Validates a UCUM unit code from a FHIR Quantity string using a terminology server.
 * Based on https://hl7.org/fhirpath/N1/#toquantityunit-string-quantity.
 *
 * @param rawValue - Quantity string (e.g. "10 'mg'").
 * @param qItem - The QuestionnaireItem metadata.
 * @param itemPreferredTerminologyServers - Map of item-specific terminology servers.
 * @param defaultTerminologyServerUrl - Fallback terminology server URL.
 * @returns Promise resolving to a ValidateCodeResponse or null.
 */
export declare function validateQuantityUcumCode(rawValue: string, qItem: Omit<QuestionnaireItem, 'item'>, itemPreferredTerminologyServers: Record<string, string>, defaultTerminologyServerUrl: string): UcumQuantityPromise;
/**
 * Parse and convert calculatedExpression values of type `quantity` into valid UCUM-coded `Quantity` objects.
 *
 * This function:
 * - Iterates over calculatedExpressions grouped by `linkId`
 * - Identifies expressions with `from: "item"` and valid quantity strings (e.g. `"10 'mg'"`)
 * - Validates the UCUM unit code against a terminology server
 * - Converts validated expressions into FHIR `Quantity` objects with `value`, `system`, `code`, and `unit`
 * - Leaves non-quantity or invalid expressions unchanged
 *
 * @param diffCalculatedExpressions - Map of `linkId` → calculatedExpressions to process
 * @param questionnaireItemMap - Map of `linkId` → QuestionnaireItem metadata
 * @param itemPreferredTerminologyServers - Map of `linkId` → preferred terminology server URL
 * @param defaultTerminologyServerUrl - Default terminology server URL if no item-specific server is defined
 * @returns A promise resolving to the same structure as `diffCalculatedExpressions`, with quantity expressions converted to FHIR `Quantity` objects where possible
 */
export declare function parseAndConvertUcumQuantities(diffCalculatedExpressions: Record<string, CalculatedExpression[]>, questionnaireItemMap: Record<string, Omit<QuestionnaireItem, 'item'>>, itemPreferredTerminologyServers: Record<string, string>, defaultTerminologyServerUrl: string): Promise<Record<string, CalculatedExpression[]>>;
export {};