import { EventEmitter } from 'events';
import { AuditLog, CNDConfig, AuthenticationContext } from '../types.js';
export declare class AuditLogger extends EventEmitter {
    private config;
    private auditLogs;
    private maxMemoryLogs;
    constructor(config: CNDConfig['security']);
    /**
     * Log an audit event
     */
    log(operation: string, resource: string, context: AuthenticationContext, details?: Record<string, any>, result?: 'success' | 'failure' | 'partial', duration?: number): Promise<void>;
    /**
     * Log database operation
     */
    logDatabaseOperation(operation: 'CREATE' | 'READ' | 'UPDATE' | 'DELETE', table: string, recordId: string | number, context: AuthenticationContext, changes?: Record<string, any>, duration?: number): Promise<void>;
    /**
     * Log API operation
     */
    logAPIOperation(method: string, endpoint: string, context: AuthenticationContext, requestBody?: any, responseStatus?: number, duration?: number): Promise<void>;
    /**
     * Log authentication event
     */
    logAuthentication(event: 'LOGIN' | 'LOGOUT' | 'TOKEN_REFRESH' | 'ACCESS_DENIED', userId: string, details?: Record<string, any>, result?: 'success' | 'failure'): Promise<void>;
    /**
     * Get audit logs for a user
     */
    getUserAuditLogs(userId: string, startDate?: Date, endDate?: Date, limit?: number): Promise<AuditLog[]>;
    /**
     * Get audit logs for a resource
     */
    getResourceAuditLogs(resource: string, startDate?: Date, endDate?: Date, limit?: number): Promise<AuditLog[]>;
    /**
     * Get audit statistics
     */
    getAuditStats(startDate?: Date, endDate?: Date): Promise<{
        totalEvents: number;
        uniqueUsers: number;
        operations: Record<string, number>;
        results: Record<string, number>;
        avgDuration: number;
    }>;
    /**
     * Cleanup old audit logs
     */
    cleanupOldLogs(): Promise<void>;
    private storeAuditLog;
    private generateLogId;
    private sanitizeRequestBody;
}
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