/**
 * LoggerService - Structured logging with Winston
 *
 * Features:
 * - Multiple log levels (debug, info, warn, error)
 * - Colorized console output
 * - File logging with rotation
 * - Context tracking
 * - Performance timing
 */
export declare enum LogLevel {
    _DEBUG = "debug",
    _INFO = "info",
    _WARN = "warn",
    _ERROR = "error"
}
export interface LogContext {
    operation?: string;
    component?: string;
    duration?: number;
    [key: string]: unknown;
}
export declare class LoggerService {
    private static instance;
    private logger;
    private readonly logDir;
    private constructor();
    static getInstance(): LoggerService;
    /**
     * Log debug message
     */
    debug(message: string, context?: LogContext): void;
    /**
     * Log info message
     */
    info(message: string, context?: LogContext): void;
    /**
     * Log warning message
     */
    warn(message: string, context?: LogContext): void;
    /**
     * Log error message
     */
    error(message: string, error?: Error, context?: LogContext): void;
    /**
     * Start timing an operation
     */
    startTimer(operation: string): () => void;
    /**
     * Get log directory path
     */
    getLogDir(): string;
    /**
     * Get latest log file content
     */
    getLatestLog(lines?: number): string;
    /**
     * Clear all logs
     */
    clearLogs(): void;
    /**
     * Format context for logging
     */
    private formatContext;
}
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