import { Logger } from 'pino';
import { ScanController } from '../../../utils/scanner.js';
import { TrafficSniffer } from '../../trackers/traffic-sniffer.js';
import type { IScanOptions, IScanReport } from '../../../types/public.js';
/**
 * Service responsible for managing Modbus device scanning operations.
 * Supports both RTU (Serial) and TCP (Network) scanning.
 */
export declare class ScanService {
    private _activeController;
    private _isScanning;
    private readonly _scanner;
    /**
     * @param {Logger} logger - Pino logger instance for scan activity.
     * @param {TrafficSniffer} [sniffer] - Optional sniffer for debugging raw traffic during scans.
     */
    constructor(logger: Logger, sniffer?: TrafficSniffer);
    /** Indicates whether a scanning process is currently active. */
    get isScanning(): boolean;
    /** Pauses the current scanning operation. */
    pause(): void;
    /** Resumes a paused scanning operation. */
    resume(): void;
    /** Stops the current scanning operation immediately. */
    stop(): void;
    /**
     * Starts a Modbus RTU scan.
     * Automatically detects if the environment is Node.js or WebSerial based on options.
     *
     * @param {IScanOptions} options - Scanning parameters (baud rates, slave IDs, etc.).
     * @param {ScanController} [controller] - Optional external controller to manage the scan state.
     * @returns {Promise<IScanReport>} Results of the scan.
     * @throws {Error} If another scan is already in progress.
     */
    scanRtu(options: IScanOptions, controller?: ScanController): Promise<IScanReport>;
    /**
     * Starts a Modbus TCP scan.
     *
     * @param {IScanOptions} options - Scanning parameters (hosts, ports, unit IDs).
     * @param {ScanController} [controller] - Optional external controller.
     * @returns {Promise<IScanReport>} Results of the scan.
     * @throws {Error} If another scan is already in progress.
     */
    scanTcp(options: IScanOptions, controller?: ScanController): Promise<IScanReport>;
    /**
     * Internal helper to determine if the scan should use Node SerialPort or WebSerial API.
     * @private
     */
    private _detectRtuTransportType;
}