import FastSafeStringify from 'fast-safe-stringify';
import stripAnsi = require('strip-ansi');
export declare namespace N9Log {
    type Level = 'silent' | 'error' | 'warn' | 'info' | 'debug' | 'trace';
    type OptionsParamsForFilter = Omit<N9Log.Options, 'filters'>;
    interface FilterParameter {
        message: string;
        context: object;
        options: OptionsParamsForFilter;
    }
    type Filter = (filterParameter: FilterParameter) => {
        message?: string;
        context?: object;
    };
    interface Options {
        level?: Level;
        formatJSON?: boolean;
        filters?: Filter[];
    }
}
export declare const safeStringify: typeof FastSafeStringify;
export declare const removeColors: typeof stripAnsi;
export declare class N9Log {
    private static readonly customChalk;
    private static readonly colorByLevel;
    stream: {
        write: (message: string) => void;
    };
    readonly name: string;
    readonly level: N9Log.Level;
    private readonly options;
    private isLevelEnabledCache;
    private profilers;
    readonly maxDeep: number;
    constructor(name: string, options?: N9Log.Options, parentLogger?: N9Log);
    get formatJSON(): boolean;
    module(name: string, options?: N9Log.Options): N9Log;
    isLevelEnabled(level: N9Log.Level): boolean;
    /**
     * Tracks the time inbetween subsequent calls to this method with the same
     * `id` parameter. The second call to this method will log the difference in
     * milliseconds along with the message.
     *
     * @param id Unique id of the profiler
     * @param message Message to print at the end
     * @param meta Context to add to the log
     */
    profile(id: string, message?: string, meta?: object): void;
    error(message: string, context?: object): void;
    warn(message: string, context?: object): void;
    info(message: string, context?: object): void;
    debug(message: string, context?: object): void;
    trace(message: string, context?: object): void;
    addFilter(filter: N9Log.Filter): void;
    private initLogger;
    private initIsLevelEnabledCache;
    private print;
    private getStreamOutputFromLevel;
    private getOutputLine;
    private jsonify;
}
declare const _default: (name: string, options?: N9Log.Options) => N9Log;
export default _default;