import { DynamicModule } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import { HubResource } from '../../../../hub-resource.enum';
import { SearchDocument } from '../../../../models';
import { AuthenticationModuleOptions } from '../../../authentication';
import { CacheService } from '../../../cache';
import { BaseHttpService } from '../../base-http.service';
import { ServicesModuleOptions } from '../../services-module-options.interface';
import { IndexDocumentDtoV1 } from './dtos';
export declare function InjectFeatureSearchService(): ParameterDecorator;
/**
 * SearchService
 *
 * Handles indexing, deindexing, and similarity search for specified resource types.
 * Acts as a bridge to an internal search microservice (e.g., Meilisearch).
 */
export declare class SearchService extends BaseHttpService {
    readonly options: ServicesModuleOptions;
    private readonly cacheService?;
    /**
     * Creates a SearchService client for a specific resource.
     *
     * @param authenticationOptions Authentication options injected from the Auth module.
     * @param options Options specifying the resource type this service operates on.
     * @param configService NestJS configuration service for environment variables and URLs.
     * @param cacheService Optional caching service for retrieving similar documents efficiently.
     */
    constructor(authenticationOptions: AuthenticationModuleOptions, options: ServicesModuleOptions, configService: ConfigService, cacheService?: CacheService);
    /**
     * Factory method for creating a resource-specific SearchService module.
     *
     * @param resource - The resource type this module will provide services for.
     * @returns A DynamicModule that provides a SearchService instance for the specified resource.
     */
    static forResource(resource: HubResource): DynamicModule;
    /**
     * Indexes or updates a searchable document in the search index.
     * Useful for ensuring resource changes are discoverable via search.
     *
     * @param {string} resourceId - Unique identifier of the resource.
     * @param {IndexDocumentDtoV1} document - Document containing searchable content.
     */
    indexDocumentV1(resourceId: string, document: IndexDocumentDtoV1): void;
    /**
     * Removes a resource from the search index.
     * Ideal when the resource is deleted or should no longer be discoverable.
     *
     * @param {string} resourceId - Identifier of the resource to be deindexed.
     */
    deleteDocumentV1(resourceId: string): void;
    /**
     * Retrieves documents similar to the provided resource from the search index.
     * Helps with content discovery and recommendations.
     *
     * @param {string} resourceId - Identifier of the base resource for similarity matching.
     * @returns {Promise<SearchDocument[]>} - Array of documents similar to the given resource.
     */
    fetchSimilarDocumentsV1(resourceId: string): Promise<SearchDocument[]>;
    /**
     * Retrieves similar documents from the cache if available; otherwise fetches from the backend.
     *
     * @param resourceId Unique identifier of the resource.
     * @returns Cached or freshly retrieved similar documents.
     */
    fetchCachedSimilarDocumentsV1(resourceId: string): Promise<SearchDocument[]>;
}