import { QueueService } from './queue.service';
import { MessageRepository } from '../../infrastructure/repositories/message.repository';
import { LogRepository } from '../../infrastructure/repositories/log.repository';
import { FileSystemAdapter } from '../../infrastructure/adapters/filesystem.adapter';
/**
 * Application Service
 * Main orchestrator for engraving job message processing workflow.
 * Receives messages from queue and creates JSON files for engraving.
 */
export declare class ApplicationService {
    private queueService;
    private messageRepository;
    private logRepository;
    private fileSystemAdapter;
    constructor(queueService: QueueService, messageRepository: MessageRepository, logRepository: LogRepository, fileSystemAdapter: FileSystemAdapter);
    /**
     * Processes the next message from the queue
     * @returns true if a message was processed, false if queue is empty
     */
    processNextMessage(): Promise<boolean>;
    /**
     * Processes a specific message (used when message is pre-fetched)
     * Creates a JSON file for the engraving job.
     * @param queueMessage - The PGMQ message to process
     * @returns true if processed successfully
     */
    processMessage(queueMessage: any): Promise<boolean>;
    /**
     * Creates the engraving JSON file in the target folder.
     * @param message - The message entity containing engraving data
     * @param fileName - The file name to use for the JSON file
     * @returns Result object with success status, file path, and size or error
     */
    private createEngravingJsonFile;
    /**
     * Logs an info message
     */
    private logInfo;
    /**
     * Logs an error message
     */
    private logError;
}
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