export declare enum LogLevel {
    ERROR = 0,
    WARN = 1,
    INFO = 2,
    DEBUG = 3
}
/**
 * Structured logging utility for PDF processing
 */
export declare class Logger {
    private static instance;
    private logLevel;
    private constructor();
    static getInstance(): Logger;
    private parseLogLevel;
    private shouldLog;
    private formatMessage;
    error(message: string, error?: Error, 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;
    /**
     * Log progress updates
     */
    progress(percentage: number, message: string, context?: Record<string, any>): void;
    /**
     * Log performance metrics
     */
    performance(operation: string, duration: number, context?: Record<string, any>): void;
}
export declare const logger: Logger;
//# sourceMappingURL=Logger.d.ts.map