/**
 * @license
 * Copyright 2023 Nuraly, Laabidi Aymen
 * SPDX-License-Identifier: MIT
 */
import type { ChatbotPlugin } from '../core/types.js';
/**
 * Base class for Chatbot plugins with handy utilities.
 * - Provides one-time-per-conversation style injection with a data-marker.
 */
export declare abstract class ChatPluginBase implements ChatbotPlugin {
    abstract readonly id: string;
    abstract readonly name: string;
    abstract readonly version: string;
    private _stylesInjected;
    private _lastThreadId?;
    /**
     * Returns a <style> tag only once per conversation (thread) to avoid duplicates.
     * Adds a data attribute marker to the style tag for easy detection.
     *
     * Usage: const styleTag = this.getOncePerConversationStyleTag(cssString)
     */
    protected getOncePerConversationStyleTag(css: string, hostSelector?: string): string;
    /**
     * Reset style injection flag when conversation (thread) changes.
     * This relies on ChatbotState.currentThreadId presence.
     */
    onStateChange?(state: Readonly<any>): void;
    onInit?(controller?: any): void;
    onDestroy?(): void;
    onMessageSent?(message: any): void | Promise<void>;
    onMessageReceived?(message: any): void | Promise<void>;
    beforeSend?(text: string): string | Promise<string>;
    afterReceive?(text: string): string | Promise<string>;
    onError?(error: Error): void;
    htmlTags?: Array<{
        name: string;
        open: string;
        close: string;
    }>;
    renderHtmlBlock?(name: string, content: string): string;
    renderArtifactContent?(artifact: any): string;
}
//# sourceMappingURL=chat-plugin.d.ts.map