import { Timer } from './timer';
import type { ContextData, Formatter, LoggerConfig, TraceMethod, TracingOptions } from './types';
import { LogLevel } from './types';
export declare class Logger {
    private config;
    private formatter;
    private context;
    private tracer;
    private timerManager;
    constructor(config?: Partial<LoggerConfig>);
    traceLog(message: string, metadata?: Record<string, unknown>): void;
    debug(message: string, metadata?: Record<string, unknown>): void;
    info(message: string, metadata?: Record<string, unknown>): void;
    warn(message: string, metadata?: Record<string, unknown>): void;
    error(message: string, metadata?: Record<string, unknown>, error?: Error): void;
    fatal(message: string, metadata?: Record<string, unknown>, error?: Error): void;
    withContext<T>(context: ContextData, fn: () => T): T;
    extendContext<T>(additionalContext: Partial<ContextData>, fn: () => T): T;
    setContext(key: string, value: unknown): void;
    getContext(): ContextData;
    trace: TraceMethod;
    getTraceId(): string | undefined;
    startSpan(options: TracingOptions): import("./types").TraceContext | null;
    finishSpan(spanId: string): number | undefined;
    addTraceMetadata(key: string, value: unknown): void;
    addTraceTags(...tags: string[]): void;
    startTimer(id?: string): Timer | null;
    stopTimer(id: string): number | undefined;
    getTimer(id: string): Timer | undefined;
    child(context: Partial<ContextData>): Logger;
    setLevel(level: LogLevel): void;
    setFormatter(formatter: Formatter): void;
    profile<T>(operationName: string, fn: () => T | Promise<T>, options?: {
        logResult?: boolean;
        logLevel?: LogLevel;
    }): Promise<T>;
    logRequest(method: string, url: string, statusCode?: number, duration?: number): void;
    flush(): Promise<void>;
    getStats(): {
        activeTimers: number;
        activeSpans: number;
        config: LoggerConfig;
    };
    protected output(message: string, level: LogLevel): void;
    private log;
    private getHttpLogLevel;
}