/**
 * Logger utility with configurable log levels
 */
export type LogLevel = 'trace' | 'debug' | 'info' | 'warn' | 'error' | 'silent';
export interface LoggerOptions {
    /** Minimum log level (default: 'silent') */
    level?: LogLevel;
    /** Prefix for all log messages */
    prefix?: string;
    /** Include timestamps (default: true) */
    timestamps?: boolean;
    /** Custom log handler (default: console) */
    handler?: LogHandler;
}
export interface LogEntry {
    level: LogLevel;
    message: string;
    data?: unknown;
    timestamp: string;
    prefix?: string;
    requestId?: string;
}
export type LogHandler = (entry: LogEntry) => void;
export declare class Logger {
    private level;
    private prefix?;
    private timestamps;
    private handler;
    private requestId?;
    constructor(options?: LoggerOptions);
    /** Create a child logger with additional prefix */
    child(prefix: string): Logger;
    /** Set request ID for correlation */
    setRequestId(id: string): void;
    /** Clear request ID */
    clearRequestId(): void;
    /** Get current log level name */
    getLevelName(): LogLevel;
    /** Set log level */
    setLevel(level: LogLevel): void;
    /** Check if level is enabled */
    isLevelEnabled(level: LogLevel): boolean;
    private log;
    trace(message: string, data?: unknown): void;
    debug(message: string, data?: unknown): void;
    info(message: string, data?: unknown): void;
    warn(message: string, data?: unknown): void;
    error(message: string, data?: unknown): void;
}
export declare function getLogger(): Logger;
export declare function setGlobalLogger(logger: Logger): void;
export declare function createLogger(options: LoggerOptions): Logger;
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