import { mongo } from 'mongoose';
/**
 * Validation helper functions for repository operations
 */
/**
 * Normalizes an ID value to a string representation
 * Handles strings, ObjectId instances, and buffer-like objects
 */
export declare function normalizeIdToString(id: unknown): string | null;
/**
 * Converts an array of IDs to ObjectIds for MongoDB queries
 * Handles strings, ObjectId instances, and buffer-like objects
 * Filters out invalid ObjectIds silently
 */
export declare function convertToObjectIds(ids: unknown[]): mongo.ObjectId[];
export declare const MAX_LIMIT = 100;
export declare const MIN_LIMIT = 1;
export declare const DEFAULT_PAGE = 1;
/**
 * Validates ObjectId format
 * @throws {ValidationError} If ID is invalid
 */
export declare function validateObjectId(id: string, fieldName?: string): void;
/**
 * Validates pagination parameters and returns normalized values
 * @returns Validated and normalized pagination parameters
 */
export declare function validatePagination(limit?: number, page?: number): {
    limit: number;
    page: number;
};
/**
 * Selects fields to show in query projection
 * Converts comma-separated string to space-separated format for Mongoose
 */
export declare function selectFieldsShow(fields?: string): string;
/**
 * Sanitizes a query condition object to convert buffer-like ObjectId values
 * Handles: _id, id, and any field ending in Id or Ids (positionId, orgIds, etc.)
 * Handles nested conditions: $in, $or, $and, $nor, $not, $elemMatch
 * Filters out empty objects that would cause MongoDB casting errors
 */
export declare function sanitizeQueryCondition<T extends Record<string, unknown>>(cond: T | null | undefined): T | null;