import { AbstractControl, FormGroup, ValidatorFn } from '@angular/forms';
import { DynamicFormField, FieldValidation } from '../models/form-field.model';
import * as i0 from "@angular/core";
export declare class DynamicFormBuilderService {
    private uniqueness;
    buildFormGroup(fields: DynamicFormField[]): FormGroup;
    /** Build group-level validators for cross-field constraints */
    buildGroupValidators(fields: DynamicFormField[], atLeastOneOf?: string[], atLeastOneOfMessage?: string): ValidatorFn[];
    buildValidators(validation?: FieldValidation): ValidatorFn[];
    getErrorMessage(control: AbstractControl, validation?: FieldValidation): string | null;
    private formatDateFr;
    /**
     * Cross-field bound validator: sets an error on `fieldKey` when:
     *   mode 'max': field value > other field value
     *   mode 'min': field value < other field value
     * Numbers and dates (Date from mat-datepicker or ISO string) — see compareFieldValues.
     *
     * Error is set directly on the FormControl so the existing per-field
     * error display in DynamicFieldComponent picks it up automatically.
     */
    private crossFieldBoundValidator;
    /** Group-level validator: at least one of the listed field keys must have a non-empty value */
    atLeastOneOfValidator(keys: string[], msg?: string): ValidatorFn;
    static ɵfac: i0.ɵɵFactoryDeclaration<DynamicFormBuilderService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<DynamicFormBuilderService>;
}