import { Format } from './logger-format';
import { LoggerTransport } from './LoggerTransport';
import { LEVEL } from '../constants';
export type LogType = 'emerg' | 'error' | 'warn' | 'info' | 'debug';
export declare const LogLevel: Record<LogType, number>;
export interface LogInfo {
    level: LogType;
    message: any;
    splat: unknown[];
    [LEVEL]: LogType;
    [key: string]: unknown;
}
type LoggerFunc = (...args: unknown[]) => void;
export interface LoggerOptions {
    format?: Format;
    level?: LogType;
    transports?: LoggerTransport | LoggerTransport[];
}
export declare class Logger {
    emerg: LoggerFunc;
    error: LoggerFunc;
    warn: LoggerFunc;
    info: LoggerFunc;
    debug: LoggerFunc;
    readonly level: LogType;
    readonly levels: Record<LogType, number>;
    protected format: Format;
    protected readonly transports?: LoggerTransport[];
    constructor({ format, level, transports, }?: LoggerOptions);
    add(transport: any, options?: {
        force: boolean;
    }): void;
    remove(transport: any): void;
    updateFormat(format: Format): void;
    private log;
    private createLogFunc;
    private write;
}
export {};