import { KnowledgeFilterOptions, Neo4jKnowledge, PaginatedResult } from './types.js';
/**
 * Service for managing Knowledge entities in Neo4j
 */
export declare class KnowledgeService {
    /**
     * Add a new knowledge item
     * @param knowledge Input data, potentially including domain and citations for relationship creation
     * @returns The created knowledge item (without domain/citations properties)
     */
    static addKnowledge(knowledge: Omit<Neo4jKnowledge, 'id' | 'createdAt' | 'updatedAt'> & {
        id?: string;
        domain?: string;
        citations?: string[];
    }): Promise<Neo4jKnowledge>;
    /**
     * Link two knowledge items with a specified relationship type.
     * @param sourceId ID of the source knowledge item
     * @param targetId ID of the target knowledge item
     * @param relationshipType The type of relationship to create (e.g., 'RELATED_TO', 'IS_SUBTOPIC_OF') - Validation needed
     * @returns True if the link was created successfully, false otherwise
     */
    static linkKnowledgeToKnowledge(sourceId: string, targetId: string, relationshipType: string): Promise<boolean>;
    /**
     * Get a knowledge item by ID, including its domain and citations via relationships.
     * @param id Knowledge ID
     * @returns The knowledge item with domain and citations added, or null if not found.
     */
    static getKnowledgeById(id: string): Promise<(Neo4jKnowledge & {
        domain: string | null;
        citations: string[];
    }) | null>;
    /**
     * Update a knowledge item, including domain and citation relationships.
     * @param id Knowledge ID
     * @param updates Updates including optional domain and citations
     * @returns The updated knowledge item (without domain/citations properties)
     */
    static updateKnowledge(id: string, updates: Partial<Omit<Neo4jKnowledge, 'id' | 'projectId' | 'createdAt' | 'updatedAt'>> & {
        domain?: string;
        citations?: string[];
    }): Promise<Neo4jKnowledge>;
    /**
     * Delete a knowledge item
     * @param id Knowledge ID
     * @returns True if deleted, false if not found
     */
    static deleteKnowledge(id: string): Promise<boolean>;
    /**
     * Get knowledge items for a project with optional filtering and server-side pagination.
     * Returns domain and citations via relationships.
     * @param options Filter and pagination options
     * @returns Paginated list of knowledge items including domain and citations
     */
    static getKnowledge(options: KnowledgeFilterOptions): Promise<PaginatedResult<Neo4jKnowledge & {
        domain: string | null;
        citations: string[];
    }>>;
    /**
     * Get all available domains with item counts
     * @returns Array of domains with counts
     */
    static getDomains(): Promise<Array<{
        name: string;
        count: number;
    }>>;
    /**
     * Get all unique tags used across knowledge items with counts
     * @param projectId Optional project ID to filter tags
     * @returns Array of tags with counts
     */
    static getTags(projectId?: string): Promise<Array<{
        tag: string;
        count: number;
    }>>;
    /**
     * Add CITES relationships from a knowledge item to new Citation nodes.
     * @param knowledgeId Knowledge ID
     * @param citations Array of citation source strings
     * @returns The IDs of the created Citation nodes
     * @private
     */
    private static addCitations;
}