/**
 * Log levels in ascending order of severity
 */
export declare enum LogLevel {
    DEBUG = 0,
    INFO = 1,
    WARN = 2,
    ERROR = 3
}
/**
 * Logger interface for structured logging
 */
export interface Logger {
    /**
     * Log an error message with optional context
     */
    error(message: string, context?: Record<string, any>): void;
    /**
     * Log a warning message with optional context
     */
    warn(message: string, context?: Record<string, any>): void;
    /**
     * Log an informational message with optional context
     */
    info(message: string, context?: Record<string, any>): void;
    /**
     * Log a debug message with optional context
     */
    debug(message: string, context?: Record<string, any>): void;
}
/**
 * Console-based logger implementation
 * Respects the configured log level and outputs to console
 */
export declare class ConsoleLogger implements Logger {
    private level;
    constructor(level?: LogLevel);
    /**
     * Set the minimum log level
     */
    setLevel(level: LogLevel): void;
    /**
     * Get the current log level
     */
    getLevel(): LogLevel;
    error(message: string, context?: Record<string, any>): void;
    warn(message: string, context?: Record<string, any>): void;
    info(message: string, context?: Record<string, any>): void;
    debug(message: string, context?: Record<string, any>): void;
}
/**
 * No-op logger implementation that produces no output
 * Useful for production environments or when logging should be disabled
 */
export declare class NoOpLogger implements Logger {
    error(_message: string, _context?: Record<string, any>): void;
    warn(_message: string, _context?: Record<string, any>): void;
    info(_message: string, _context?: Record<string, any>): void;
    debug(_message: string, _context?: Record<string, any>): void;
}
/**
 * Create a default logger instance
 * Uses ConsoleLogger with INFO level by default
 */
export declare function createDefaultLogger(): Logger;
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