import * as fs from 'fs-extra';
import * as path from 'path';
import { Writable } from 'stream';
import type { FileNameFormatterFn, RollingFileWriteStreamOptions, FileNameParserFn } from './types';
type RollingFileWriteStreamConfigs = Omit<Required<RollingFileWriteStreamOptions>, 'pattern'> & {
    pattern?: string;
};
export declare class RollingFileWriteStream extends Writable {
    currentFileStream: fs.WriteStream;
    fileNameFormatter: FileNameFormatterFn;
    fileNameParser: FileNameParserFn;
    fileObject: path.ParsedPath;
    filePath: string;
    filename: string;
    state: {
        currentDate?: string;
        currentSize: number;
    };
    options: RollingFileWriteStreamConfigs;
    constructor(filePath: string, options: RollingFileWriteStreamOptions);
    _setExistingSizeAndDate(): void;
    private _parseOption;
    _final(callback: (error?: Error | null) => void): void;
    _write(chunk: any, encoding: BufferEncoding, callback: (error?: Error | null) => void): void;
    private _shouldRoll;
    private _dateChanged;
    private _tooBig;
    private _roll;
    private _moveOldFiles;
    private _getExistingFiles;
    private mkdirSync;
    private _renewWriteStream;
}
export {};