import winston from 'winston';
import type { DatadogLoggerConfig } from '../../utils/index.js';
/**
 * Datadog Winston logger configuration and setup
 */
export declare class DatadogLogger {
    private static instance;
    private static config;
    /**
     * Initialize the Datadog logger with configuration
     *
     * @param config - The Datadog logger configuration object
     * @returns The initialized Winston logger instance
     */
    static initialize(config: DatadogLoggerConfig): winston.Logger;
    /**
     * Get the configured logger instance
     *
     * @returns The Winston logger instance
     * @throws Error if logger is not initialized
     */
    static getInstance(): winston.Logger;
    /**
     * Check if logger is initialized
     *
     * @returns True if the logger is initialized, false otherwise
     */
    static isInitialized(): boolean;
    /**
     * Get current configuration
     *
     * @returns The current Datadog logger configuration or null if not set
     */
    static getConfig(): DatadogLoggerConfig | null;
    /**
     * Log debug message
     *
     * @param message - The debug message to log
     * @param meta - Optional metadata object to include with the log
     */
    static debug(message: string, meta?: Record<string, unknown>): void;
    /**
     * Log info message
     *
     * @param message - The info message to log
     * @param meta - Optional metadata object to include with the log
     */
    static info(message: string, meta?: Record<string, unknown>): void;
    /**
     * Log warning message
     *
     * @param message - The warning message to log
     * @param meta - Optional metadata object to include with the log
     */
    static warn(message: string, meta?: Record<string, unknown>): void;
    /**
     * Log error message
     *
     * @param message - The error message to log
     * @param error - Optional error object or metadata to include with the log
     */
    static error(message: string, error?: Error | Record<string, unknown>): void;
    /**
     * Log with custom level
     *
     * @param level - The log level (e.g., 'info', 'debug', 'error')
     * @param message - The message to log
     * @param meta - Optional metadata object to include with the log
     */
    static log(level: string, message: string, meta?: Record<string, unknown>): void;
    /**
     * Update custom metadata that will be included in all future logs
     *
     * @param meta - The metadata object to merge with existing custom metadata
     */
    static updateCustomMeta(meta: Record<string, unknown>): void;
    /**
     * Set a specific metadata field
     *
     * @param key - The metadata field key
     * @param value - The value to set for the metadata field
     */
    static setMetaField(key: string, value: unknown): void;
    /**
     * Remove a metadata field
     *
     * @param key - The metadata field key to remove
     */
    static removeMetaField(key: string): void;
    /**
     * Get current custom metadata
     *
     * @returns The current custom metadata object
     */
    static getCustomMeta(): Record<string, unknown>;
}