import { Entity, FnFilter } from '../../../admin/src/models/Entity';
/**
 * Service class that manages CRUD operations on entities stored in a JSON file.
 */
declare class EntityService {
    private filePath;
    constructor(filePath?: string);
    /**
     * Reads the data from the JSON file asynchronously.
     * @returns The parsed JSON data.
     */
    private readFile;
    /**
     * Writes the provided data to the JSON file asynchronously.
     * @param data The data to write.
     */
    private writeFile;
    /**
     * Selects records from the JSON file based on the provided filter function or key.
     * If no filter is specified, returns all records.
     * @param filter The filter function or key to apply to the selection.
     * @returns A list of matching entities.
     */
    select<T = Entity>(filter?: FnFilter<T> | string): Promise<T[]>;
    /**
     * Finds a single entity from the JSON file based on the provided filter function.
     * @param filter The filter function to apply.
     * @returns A single matching entity or null if not found.
     */
    findOne<T = Entity>(filter: FnFilter<T>): Promise<T | null>;
    /**
     * Performs a bulk create operation, adding multiple records to the JSON file.
     * @param entities The entities to create.
     */
    bulkCreate<T = Entity>(entities: T[]): Promise<void>;
    /**
     * Performs a bulk delete operation, removing multiple records from the JSON file.
     * @param entityNames The names of the entities to delete.
     */
    bulkDelete(entityNames: string[]): Promise<void>;
    /**
     * Performs a bulk update operation, updating multiple records in the JSON file.
     * @param updatedEntities The entities with the updated values.
     */
    bulkUpdate(updatedEntities: Entity[]): Promise<void>;
}
declare const _default: EntityService;
export default _default;
export { EntityService };