/**
 * Log levels
 */
export declare enum LogLevel {
    ERROR = 0,
    WARN = 1,
    INFO = 2,
    DEBUG = 3
}
/**
 * Structured Logger Entry Schema
 */
export interface LogEntry {
    timestamp: string;
    level: string;
    context: string;
    message: string;
    meta?: any;
    error?: {
        message: string;
        stack?: string;
    };
}
/**
 * Enterprise Structured Logger supporting standard console and file output streams.
 */
declare class Logger {
    private level;
    private context;
    private format;
    private logFilePath;
    private disableConsole;
    constructor(context?: string);
    /**
     * Parse log level from string
     */
    private parseLogLevel;
    /**
     * Format text log line with color
     */
    private formatText;
    /**
     * Safe file appending utility
     */
    private appendToFile;
    /**
     * Unified writer for standard and file streams
     */
    private log;
    /**
     * Log error message
     */
    error(message: string, error?: Error | any): void;
    /**
     * Log warning message
     */
    warn(message: string, meta?: any): void;
    /**
     * Log info message
     */
    info(message: string, meta?: any): void;
    /**
     * Log debug message
     */
    debug(message: string, meta?: any): void;
    /**
     * Log performance metric
     */
    metric(name: string, value: number, unit?: string): void;
    /**
     * Create child logger with parent context chaining
     */
    child(context: string): Logger;
}
/**
 * Create logger instance
 */
export declare function createLogger(context?: string): Logger;
/**
 * Default logger instance
 */
export declare const logger: Logger;
export {};
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