/**
 * HTTP Chatbot Client
 *
 * Calls a remote chatbot API (e.g., chatter's /api/public/chat) over HTTP.
 * Maintains multi-turn conversation history per phone number.
 */
import type { ChatbotConfig } from "../../types";
/**
 * Send a message to the remote chatbot API and get a response.
 *
 * Both no-answer outcomes - a transport or HTTP failure, and a 200 whose
 * `reply` is empty - resolve the same `chatError` phrase in the caller's
 * detected language, the one `chat()` uses for its other two paths. They are
 * one situation from the caller's side (no usable answer), and the reply is
 * spoken or sent verbatim, so an English literal here would reach a caller
 * mid-conversation in their own language.
 *
 * `languageDir` is threaded in rather than read from a config this module
 * doesn't receive: `ChatbotConfig` is the remote endpoint's settings, not the
 * package's. Omitting it falls back to the built-in phrase files.
 */
export declare function chatViaHTTP(config: ChatbotConfig, phoneNumber: string, message: string, languageDir?: string): Promise<string>;