import { ConfigService } from '@nestjs/config';
import { LabComment, LabJsonContentRichtext } from 'itlab-functions';
import { Connection } from 'mongoose';
import { AuthenticationModuleOptions } from '../authentication';
import { CacheService } from '../cache';
import { BaseHttpService } from '../services/base-http.service';
import { CommentsModuleOptions } from './comments-module-options.interface';
/**
 * CommentsService manages persistence and business logic
 * for adding, comments on resource entities.
 *
 * Why: Encapsulates MongoDB operations and ensures consistent handling
 * of comment-related behavior across all resources that support comments.
 */
export declare class CommentsService extends BaseHttpService {
    private readonly options;
    private readonly connection?;
    private readonly cacheService?;
    /**
     * Constructs the CommentsService with a configured model instance.
     *
     * Why: Using the provided Mongoose connection and model options ensures
     * that comments are tied to the correct resource collection dynamically.
     *
     * @param {CommentsModuleOptions} options - Config for the commentable resource model.
     * @param {Connection} connection - Mongoose database connection.
     */
    constructor(authenticationOptions: AuthenticationModuleOptions, options: CommentsModuleOptions<any>, configService: ConfigService, connection?: Connection, cacheService?: CacheService);
    private get commentableModel();
    private cacheKey;
    private clearCache;
    /**
     * Posts a comment to a given resource, optionally attaching ownership metadata.
     *
     * Why:
     * - Ensures that the resource exists before attempting to save a comment.
     * - Optionally extracts `ownerId` or `ownerIds` for downstream authorization or notifications.
     * - Wraps the internal HTTP call in a promise with proper error handling and logging.
     *
     * @param {string} resourceId - MongoDB ObjectId of the resource being commented on.
     * @param {string} accountId - Authenticated user ID posting the comment.
     * @param {LabJsonContentRichtext} richtext - Comment content in rich-text format.
     * @returns {Promise<LabComment>} Resolves with the saved comment or throws an HTTP exception.
     * @throws {NotFoundException} If the resource does not exist.
     * @throws {HttpException} If the internal service call fails.
     */
    postCommentV1(resourceId: string, accountId: string, richtext: LabJsonContentRichtext): Promise<LabComment>;
    /**
     * Deletes all comments for a given resource.
     * Logs success or failure. Does not throw to avoid disrupting cleanup flows.
     *
     * @param resourceId Unique identifier of the resource whose comments will be deleted.
     */
    deleteCommentsV1(resourceId: string): void;
    /**
     * Retrieves comments from the backend.
     * Provides default values if comments retrieval fails.
     *
     * @param resourceId Unique identifier of the resource.
     * @returns Retrieved comments.
     */
    fetchPopulatedCommentsV1(resourceId: string): Promise<LabComment[]>;
    /**
     * Retrieves comments from the cache if available; otherwise fetches from the backend.
     *
     * @param resourceId Unique identifier of the resource.
     * @returns Cached or freshly retrieved comments.
     */
    fetchCachedPopulatedCommentsV1(resourceId: string): Promise<LabComment[]>;
}