import { WizardState } from './wizard-state.model';
import { EventEmitter } from '@angular/core';
/**
 * An interface describing the basic functionality, which must be provided by a navigation mode.
 * A navigation mode manages the navigation between different wizard steps, this contains the validation, if a step transition can be done
 *
 * @author Marc Arndt
 */
export declare abstract class NavigationMode {
    protected wizardState: WizardState;
    constructor(wizardState: WizardState);
    /**
     * Checks, whether a wizard step, as defined by the given destination index, can be transitioned to.
     *
     * @param {number} destinationIndex The index of the destination step
     * @returns {Promise<boolean>} A [[Promise]] containing `true`, if the destination step can be transitioned to and false otherwise
     */
    abstract canGoToStep(destinationIndex: number): Promise<boolean>;
    /**
     * Tries to transition to the wizard step, as denoted by the given destination index.
     * If this is not possible, the current wizard step should be exited and then reentered with `MovingDirection.Stay`
     *
     * @param {number} destinationIndex The index of the destination step
     * @param {EventEmitter<void>} preFinalize An event emitter, to be called before the step has been transitioned
     * @param {EventEmitter<void>} postFinalize An event emitter, to be called after the step has been transitioned
     */
    abstract goToStep(destinationIndex: number, preFinalize?: EventEmitter<void>, postFinalize?: EventEmitter<void>): void;
    /**
     * Checks, whether the wizard step, located at the given index, is can be navigated to
     *
     * @param {number} destinationIndex The index of the destination step
     * @returns {boolean} True if the step can be navigated to, false otherwise
     */
    abstract isNavigable(destinationIndex: number): boolean;
    /**
     * Resets the state of this wizard.
     * A reset transitions the wizard automatically to the first step and sets all steps as incomplete.
     * In addition the whole wizard is set as incomplete
     */
    abstract reset(): void;
    /**
     * Tries to transition the wizard to the previous step from the `currentStep`
     */
    goToPreviousStep(preFinalize?: EventEmitter<void>, postFinalize?: EventEmitter<void>): void;
    /**
     * Tries to transition the wizard to the next step from the `currentStep`
     */
    goToNextStep(preFinalize?: EventEmitter<void>, postFinalize?: EventEmitter<void>): void;
}