/**
 * Log Level Helper
 *
 * Shared utilities for log level operations across the email-log module.
 * This eliminates code duplication and provides consistent behavior.
 */
/**
 * Log level values mapping
 * Uses Pino's standard level values
 */
export declare const LOG_LEVEL_VALUES: Record<string, number>;
/**
 * Get numeric level value from level name or number
 *
 * @param level - Level name (string) or number
 * @returns Numeric level value
 *
 * @example
 * getLevelValue('error') // returns 50
 * getLevelValue(50) // returns 50
 * getLevelValue('unknown') // returns 30 (info)
 */
export declare function getLevelValue(level: string | number): number;
/**
 * Get human-readable level label from numeric level
 *
 * @param level - Numeric level value
 * @returns Level label string
 *
 * @example
 * getLevelLabel(50) // returns 'error'
 * getLevelLabel(30) // returns 'info'
 */
export declare function getLevelLabel(level: number | string): string;
/**
 * Check if a log level meets a threshold
 *
 * @param level - The log level to check
 * @param threshold - The minimum threshold level
 * @returns true if level meets or exceeds threshold
 *
 * @example
 * meetsThreshold('error', 'warn') // true (50 >= 40)
 * meetsThreshold('info', 'error') // false (30 < 50)
 */
export declare function meetsThreshold(level: string | number, threshold: string | number): boolean;