import type { IncomingMessage } from "node:http";
export interface LoggerOptions {
    timingThresholds?: {
        yellow: number;
        orange: number;
        red: number;
    };
}
interface RequestLogger {
    onWriteHead: () => void;
    onFinish: (status: number) => void;
}
export declare class Logger {
    private enabled;
    private level;
    private thresholds;
    private activeSlots;
    private highWaterMark;
    constructor(options?: LoggerOptions);
    isEnabled(): boolean;
    onRequestStart(req: IncomingMessage): RequestLogger;
    private createErrorLevelLogger;
    private assignSlot;
    private freeSlot;
    private print;
    private renderBar;
    private elapsedMs;
    private formatTiming;
    private colorStatus;
    private colorTiming;
}
export {};