/**
 * @module botbuilder-m365
 */
/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
import { TurnContext } from 'botbuilder';
import { PromptManager } from '../Prompts';
import { TurnState } from '../TurnState';
import { Block } from './Block';
/**
 * Given a prompt, that might contain references to variables and functions:
 * - Get the list of references
 * - Resolve each reference
 *   - Variable references are resolved using the context variables
 *   - Function references are resolved invoking those functions
 *     - Functions can be invoked passing in variables
 *     - Functions do not receive the context variables, unless specified using a special variable
 *     - Functions can be invoked in order and in parallel so the context variables must be immutable when invoked within the template
 */
export declare class PromptTemplateEngine<TState extends TurnState> {
    private readonly _promptManager;
    constructor(promptManager: PromptManager<TState>);
    extractBlocks(templateText?: string, validate?: boolean): Block[];
    render(context: TurnContext, state: TState, textOrBlocks: string | Block[]): Promise<string>;
    renderVariables(context: TurnContext, state: TState, blocks: Block[]): Block[];
    renderCode(context: TurnContext, state: TState, blocks: Block[]): Promise<Block[]>;
    private readonly starter;
    private readonly ender;
    private tokenizeInternal;
    private validateBlocksSyntax;
}
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