import { Transport } from './transport.interface';
export interface FileTransportOptions {
    /**
     * Path to the log file
     */
    filePath: string;
    /**
     * Whether to append to the log file
     */
    append?: boolean;
}
/**
 * File transport for the logger
 */
export declare class FileTransport implements Transport {
    name: string;
    private filePath;
    private initialized;
    private fileStream;
    private logQueue;
    private isProcessingQueue;
    constructor(options: FileTransportOptions);
    /**
     * Initialize the file transport (called lazily)
     */
    initialize(): void;
    /**
     * Log a message to the file
     */
    log(level: string, message: string, timestamp: string, context: Record<string, any>): void;
    /**
     * Clean up resources used by the transport
     */
    cleanup(): void;
    /**
     * Ensure the log directory exists
     */
    private ensureLogDirectoryExists;
    /**
     * Initialize the file write stream
     */
    private initializeFileStream;
    /**
     * Process the log queue asynchronously
     */
    private processLogQueue;
}