/**
 * Knowledge Graph Engine for Memorai
 * Provides entity relationship management and graph-based memory operations
 */
export interface GraphEntity {
    id: string;
    name: string;
    type: string;
    properties: Record<string, unknown>;
    createdAt: Date;
    updatedAt: Date;
    tenant_id: string;
    agent_id?: string;
}
export interface GraphRelation {
    id: string;
    fromId: string;
    toId: string;
    type: string;
    properties: Record<string, unknown>;
    weight: number;
    confidence: number;
    createdAt: Date;
    updatedAt: Date;
    tenant_id: string;
    agent_id?: string;
}
export interface GraphQuery {
    entityTypes?: string[];
    relationTypes?: string[];
    properties?: Record<string, unknown>;
    maxDepth?: number;
    limit?: number;
    tenant_id: string;
    agent_id?: string;
}
export interface GraphPath {
    entities: GraphEntity[];
    relations: GraphRelation[];
    totalWeight: number;
    confidence: number;
}
export interface GraphAnalytics {
    entityCount: number;
    relationCount: number;
    avgRelationsPerEntity: number;
    strongestConnections: Array<{
        from: string;
        to: string;
        weight: number;
    }>;
    entityTypeDistribution: Record<string, number>;
    relationTypeDistribution: Record<string, number>;
    clustersDetected: number;
    centralEntities: Array<{
        entity: GraphEntity;
        centrality: number;
    }>;
}
/**
 * Advanced Knowledge Graph for entity-relationship memory storage
 */
export declare class KnowledgeGraph {
    private entities;
    private relations;
    private entityRelations;
    private relationIndex;
    /**
     * Add or update an entity in the knowledge graph
     */ addEntity(name: string, type: string, properties: Record<string, unknown>, tenant_id: string, agent_id?: string): Promise<string>;
    /**
     * Add a relation between two entities
     */ addRelation(fromId: string, toId: string, relationType: string, properties: Record<string, unknown> | undefined, weight: number | undefined, confidence: number | undefined, tenant_id: string, agent_id?: string): Promise<string>;
    /**
     * Find entities by criteria
     */
    findEntities(query: GraphQuery): GraphEntity[];
    /**
     * Get a specific entity by ID
     */
    getEntity(id: string): GraphEntity | null;
    /**
     * Get a specific relation by ID
     */
    getRelation(id: string): GraphRelation | null;
    /**
     * Find relations based on query criteria
     */
    findRelations(query: GraphQuery): GraphRelation[];
    /**
     * Find all paths between two entities
     */
    findPaths(fromId: string, toId: string, maxDepth?: number): GraphPath[];
    /**
     * Find shortest path between two entities
     */
    findShortestPath(fromId: string, toId: string, maxDepth?: number): GraphPath | null;
    /**
     * Get all connected entities within specified depth
     */
    getConnectedEntities(entityId: string, maxDepth?: number): GraphEntity[];
    /**
     * Get graph analytics and insights
     */
    getAnalytics(tenant_id: string, agent_id?: string): GraphAnalytics;
    /**
     * Remove an entity and all its relations
     */
    removeEntity(entityId: string): Promise<boolean>;
    /**
     * Remove a specific relation
     */
    removeRelation(relationId: string): Promise<boolean>;
    /**
     * Export graph data
     */
    exportGraph(tenant_id: string, agent_id?: string): {
        entities: GraphEntity[];
        relations: GraphRelation[];
    };
    /**
     * Import graph data
     */
    importGraph(data: {
        entities: GraphEntity[];
        relations: GraphRelation[];
    }): Promise<void>;
    private findEntityByNameAndType;
    private findExistingRelation;
    private detectClusters;
    private dfsCluster;
}
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