import { HttpClient } from '@angular/common/http';
import { ChatWidgetConfig, SendMessageResponse, ChatHistoryMessage, ChatListItem, KnowledgeGraphResponse, StreamMessageHandlers } from './types';
import * as i0 from "@angular/core";
export declare class ChatWidgetService {
    private http;
    private config;
    constructor(http: HttpClient, config: ChatWidgetConfig);
    setConfig(config: ChatWidgetConfig): void;
    private getHeaders;
    private joinUrl;
    private resolveOnce;
    private resolveEndpoint;
    resolveDocumentUrl(filename: string, pageNumber?: number | null): string;
    loadKnowledgeGraph(docUuid: string, options?: {
        maxNodes?: number;
        maxEdges?: number;
    }): Promise<KnowledgeGraphResponse>;
    private appendChatIdQuery;
    createChat(chatId: string, title?: string): Promise<void>;
    updateChat(chatId: string, payload: {
        title?: string;
        pinned?: boolean;
    }): Promise<ChatListItem | null>;
    deleteChat(chatId: string): Promise<void>;
    loadChats(): Promise<ChatListItem[]>;
    loadHistory(chatId: string): Promise<ChatHistoryMessage[]>;
    sendMessage(chatId: string, message: string): Promise<SendMessageResponse | null>;
    submitFeedback(chatId: string, message: ChatHistoryMessage, isLike: boolean): Promise<void>;
    streamMessage(chatId: string, message: string, handlers: StreamMessageHandlers): Promise<void>;
    private parseMessageResponse;
    private parseArrayMessageResponse;
    private normalizeHistoryMessages;
    private normalizeHistoryRole;
    private citationsFromContent;
    private consumeStreamBuffer;
    private extractJsonObjects;
    private normalizeCitations;
    private normalizeKnowledgeGraphResponse;
    private extractEdgeNodeId;
    private toNullableNumber;
    static ɵfac: i0.ɵɵFactoryDeclaration<ChatWidgetService, [null, { optional: true; }]>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ChatWidgetService>;
}