import { LoggerService as NestLoggerService } from '@nestjs/common';
import { Model } from 'mongoose';
import { LogEntry, LogQuery } from './interfaces/config.interface';
import { UniversalLoggerConfig } from './universal-logger.config';
export declare class UniversalLoggerService implements NestLoggerService {
    private readonly logModel;
    private readonly winstonLogger;
    private readonly config;
    private readonly serviceName;
    private readonly environment;
    private readonly version;
    constructor(logModel: Model<LogEntry>, config: UniversalLoggerConfig);
    private createTransports;
    private createLogEntry;
    private getSeverityLevel;
    log(message: string, context?: string, metadata?: Record<string, any>): void;
    error(message: string, trace?: string, context?: string, metadata?: Record<string, any>): void;
    warn(message: string, context?: string, metadata?: Record<string, any>): void;
    debug(message: string, context?: string, metadata?: Record<string, any>): void;
    verbose(message: string, context?: string, metadata?: Record<string, any>): void;
    logApiCall(req: any, res: any, duration: number, statusCode: number): void;
    logPerformance(operation: string, duration: number, metadata?: Record<string, any>): void;
    logDatabaseQuery(query: string, duration: number, table?: string, operation?: string): void;
    logExternalCall(url: string, method: string, duration: number, statusCode: number, response?: any): void;
    logSecurity(event: string, metadata?: Record<string, any>): void;
    logAuthEvent(event: string, userId?: string, success?: boolean, metadata?: Record<string, any>): void;
    logBusinessLogic(operation: string, data: any, context?: string): void;
    logUserAction(action: string, userId: string, metadata?: Record<string, any>): void;
    logFeatureUsage(feature: string, userId?: string, metadata?: Record<string, any>): void;
    logSystemMetrics(): void;
    getLogs(query: LogQuery): Promise<LogEntry[]>;
    getLogStats(timeRange: {
        start: Date;
        end: Date;
    }): Promise<any>;
    cleanupOldLogs(daysToKeep?: number): Promise<number>;
    private sanitizeHeaders;
    private isBodyLoggable;
    private getResponseBody;
}