import { InjectionToken } from '@angular/core';
import { AbstractControl, NgForm } from '@angular/forms';
export declare const JSS_FORM_TOKEN: InjectionToken<JssForm>;
export declare type ConditionalCallback<T> = (...controls: AbstractControl[]) => T;
export declare class Conditional<T> {
    protected fields: string[];
    protected cb: ConditionalCallback<T>;
    constructor(fields: string[], cb: ConditionalCallback<T>);
}
export interface InternalConditional<T> {
    fields: string[];
    cb: ConditionalCallback<T>;
}
export declare function conditional<T>(fields: string[], cb: ConditionalCallback<T>): Conditional<T>;
export interface JssForm {
    readonly field: any;
    readonly ngForm: NgForm;
    onAction(action: string): void;
}
export interface HintBase {
    type: string;
    message: string;
}
export interface ErrorHint {
    type: 'error';
    message: string;
    error?: string;
}
export interface WarningHint {
    type: 'warning';
    message: string;
}
export interface DefaultHint {
    type: 'default';
    message: string;
}
export declare type Hint = HintBase | DefaultHint | ErrorHint | WarningHint;
export interface FormHints {
    hints?: (Hint | Conditional<Hint>)[];
}
export declare function hasFormHints(arg: any): arg is FormHints;