import type { ProjectStructure } from '../../analyzer/project-structure';
import type { TreeNodeData } from '../types';
/**
 * Helper function to format bytes into human-readable form.
 */
export declare function formatBytes(bytes: number, decimals?: number): string;
/**
 * Converts flat graph data (nodes and links) into a hierarchical tree structure
 * with calculated statistics for each node.
 */
export declare function buildTreeWithStats(projectStructure: ProjectStructure): TreeNodeData | null;
/**
 * Compute aggregated stats (fileCount, totalSize, sizeByType, etc.) for a node by traversing
 * the full graph. If reachableModuleIds is provided, it will be used directly.
 * Returns both stats and the set of reachable module IDs for reuse in views.
 */
export declare function computeAggregatedStatsForNode(projectStructure: ProjectStructure, nodeId: string, nodeType: string, reachableModuleIds?: Set<string>): {
    moduleIds: Set<string>;
    fileCount: number;
    totalSize: number;
    fileTypes: Record<string, number>;
    sizeByType: Record<string, number>;
    selfSize?: number;
};