import type { Transport, LogEntry } from '../types/index.js';
export interface FileTransportConfig {
    logFolder: string;
    filename?: string;
    datePattern?: string;
    maxFileSize?: number;
    maxFiles?: number;
    compressAfterDays?: number;
    separateByLevel?: boolean;
    includeTimestamp?: boolean;
    getFilename?: (date: string, level?: string) => string;
    format?: 'json' | 'text';
    rotationDays?: number;
}
export declare class FileTransport implements Transport {
    readonly name = "file";
    private config;
    private writeStream;
    private currentLogFile;
    private compressionInterval;
    private cleanupTimeout;
    private isClosed;
    constructor(config: FileTransportConfig);
    private ensureDirectoryExists;
    private getCurrentLogFileName;
    private initializeWriteStream;
    private shouldRotateToNewFile;
    private cleanupOldFiles;
    private compressOldFiles;
    private compressFile;
    private scheduleCompressionCheck;
    private formatEntry;
    log(entry: LogEntry): Promise<void>;
    manualCleanup(): Promise<void>;
    private safeStringify;
    close(): void;
}
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