/**
 * Unified logging utility for SearXNG MCP server
 * Provides structured logging with configurable levels
 */
export declare enum LogLevel {
    ERROR = 0,
    WARN = 1,
    INFO = 2,
    DEBUG = 3
}
export interface Logger {
    error(message: string, meta?: any): void;
    warn(message: string, meta?: any): void;
    info(message: string, meta?: any): void;
    debug(message: string, meta?: any): void;
}
/**
 * Console logger implementation
 */
export declare class ConsoleLogger implements Logger {
    private level;
    private useStderr;
    constructor(level?: LogLevel, useStderr?: boolean);
    error(message: string, meta?: any): void;
    warn(message: string, meta?: any): void;
    info(message: string, meta?: any): void;
    debug(message: string, meta?: any): void;
    setLevel(level: LogLevel): void;
}
/**
 * Create logger instance based on configuration
 */
export declare function createLogger(debug?: boolean, transportType?: string): Logger;