/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
import { DialogContext } from './dialogContext';
import { DialogReason } from './dialogReason';
import { DialogTurnResult } from './dialogTurnResult';
/**
 * Values passed to the `WaterfallStepContext` constructor.
 */
export interface WaterfallStepInfo<O extends object> {
    /**
     * The index of the current step in the waterfall dialog.
     */
    index: number;
    /**
     * The options passed to the waterfall dialog when it was started.
     */
    options: O;
    /**
     * The reason the current step is being executed.
     */
    reason: DialogReason;
    /**
     * The result returned by the previous step or dialog.
     */
    result: any;
    /**
     * A dictionary of values shared across all steps in the waterfall dialog.
     */
    values: object;
    /**
     * A function to proceed to the next step in the waterfall dialog.
     *
     * @param result Optional result to pass to the next step.
     * @returns A promise resolving to the result of the next dialog turn.
     */
    onNext(result?: any): Promise<DialogTurnResult>;
}
/**
 * Context object passed in to a `WaterfallStep`.
 *
 * @param O (Optional) type of options passed to the steps waterfall dialog in the call to `DialogContext.beginDialog()`.
 */
export declare class WaterfallStepContext<O extends object = {}> extends DialogContext {
    private _stepInfo;
    /**
       * Creates a new WaterfallStepContext instance.
       *
       * @param dialogContext The dialog context for the current turn of conversation.
       * @param stepInfo Values to initialize the step context with.
       */
    constructor(dialogContext: DialogContext, stepInfo: WaterfallStepInfo<O>);
    /**
       * The index of the current waterfall step being executed.
       *
       * @returns The index of the current waterfall step being executed.
       */
    get index(): number;
    /**
       * Any options passed to the steps waterfall dialog when it was started with
       * `DialogContext.beginDialog()`.
       *
       * @returns Any options the waterfall dialog was called with.
       */
    get options(): O;
    /**
       * The reason the waterfall step is being executed.
       *
       * @returns The reason the waterfall step is being executed.
       */
    get reason(): DialogReason;
    /**
       * Results returned by a dialog or prompt that was called in the previous waterfall step.
       *
       * @returns The result from the previous waterfall step.
       */
    get result(): any;
    /**
       * A dictionary of values which will be persisted across all waterfall steps.
       *
       * @returns A dictionary of values which will be persisted across all waterfall steps.
       */
    get values(): object;
    /**
       * Skips to the next waterfall step.
       *
       * @param result (Optional) result to pass to the next step.
       * @returns A promise with the DialogTurnResult.
       */
    next(result?: any): Promise<DialogTurnResult>;
}