import { BaseConnector } from '../../base/base.connector';
import type { IChatOptions, IChatProvider, ISendMessageSuccessResponse, WithPassthrough, ChatSendResult, IChatConnector } from '../../types';
import { ChannelTypeEnum } from '../../types';
import type { MattermostConfig } from './mattermost.config';
import type { MattermostNarrowedInput } from './mattermost.types';
/**
 * Webhook-URL-as-auth. No Authorization header; the webhookUrl IS the
 * credential.
 *
 * Mattermost Incoming Webhooks return plain text `"ok"` on success (HTTP 200)
 * and an error string on failure — non-JSON body parsing throughout. No
 * message_id is returned, so `providerMessageId` is always `null`.
 *
 * Mattermost adopted Slack's legacy attachment format verbatim. The
 * camelCase→snake_case mapping for attachment fields lives in the private
 * `toWireAttachment` method below (explicit per-connector
 * mapping, NOT generic middleware).
 */
export declare class MattermostChatConnector extends BaseConnector implements IChatProvider, IChatConnector {
    private config;
    readonly id: "mattermost";
    readonly channelType: ChannelTypeEnum.CHAT;
    constructor(config: MattermostConfig, fetchImpl?: typeof fetch);
    /**
     * Thinwrap-native send. Implements `IChatConnector`.
     *
     * `to` is intentionally absent from `MattermostNarrowedInput` — the webhook
     * URL targets the (default) channel directly. All snake_case wire
     * keys (`icon_url`, `icon_emoji`, and per-attachment `author_name`,
     * `author_link`, `author_icon`, `title_link`, `image_url`, `thumb_url`,
     * `footer_icon`) are written explicitly; no `Casing`
     * helper is invoked.
     */
    send(input: MattermostNarrowedInput): Promise<ChatSendResult>;
    /**
     * Map camelCase narrowed attachment fields to Slack-compat snake_case wire
     * keys. Lives on the connector (NOT a shared utility):
     * explicit per-connector mapping for the Slack-compat-attachment-shape
     * contract this connector owns.
     *
     * Same-form fields (`color`, `pretext`, `title`, `text`, `fields`, `footer`,
     * `timestamp`, `fallback`) pass through untouched. Unknown extension keys
     * are preserved verbatim via the `[k: string]: unknown` index signature.
     */
    private toWireAttachment;
    /**
     * HTTP-layer mapping. ConnectorError carries no
     * `retryAfterSeconds` field — retry is consumer policy:
     * parsed seconds embedded in `providerMessage` text, raw header preserved on
     * `cause.retryAfter`. Wrapper performs no retry.
     *
     * 401/403/404 all map to `auth_failed` — invalid, revoked, or
     * non-existent Incoming Webhook IDs are all credential failures.
     */
    private mapVendorError;
    sendMessage(options: IChatOptions, bridgeProviderData?: WithPassthrough<Record<string, unknown>>): Promise<ISendMessageSuccessResponse>;
}