import { EventEmitter } from 'events';
import { ServiceDiscoveryConfig } from '../types.js';
export interface ServiceInstance {
    id: string;
    name: string;
    version: string;
    host: string;
    port: number;
    protocol: 'http' | 'https' | 'tcp' | 'udp';
    status: 'healthy' | 'unhealthy' | 'unknown';
    lastSeen: Date;
    tags: string[];
    metadata: Record<string, any>;
}
export declare class ServiceDiscoveryManager extends EventEmitter {
    private config;
    private services;
    private healthCheckInterval;
    private registrationInterval;
    constructor(config: ServiceDiscoveryConfig);
    /**
     * Start service discovery
     */
    start(): Promise<void>;
    /**
     * Stop service discovery
     */
    stop(): Promise<void>;
    /**
     * Register this service instance
     */
    registerSelf(): Promise<void>;
    /**
     * Deregister this service instance
     */
    deregisterSelf(): Promise<void>;
    /**
     * Discover all available services
     */
    discoverServices(): Promise<ServiceInstance[]>;
    /**
     * Find services by name
     */
    findServices(name: string): ServiceInstance[];
    /**
     * Find services by tag
     */
    findServicesByTag(tag: string): ServiceInstance[];
    /**
     * Get service by ID
     */
    getService(id: string): ServiceInstance | undefined;
    /**
     * Get all healthy services
     */
    getHealthyServices(): ServiceInstance[];
    /**
     * Load balance - get next available instance
     */
    getNextInstance(serviceName: string): ServiceInstance | null;
    private startHealthChecks;
    private startRegistrationHeartbeat;
    private performHealthChecks;
    private checkServiceHealth;
    private registerService;
    private deregisterService;
    private queryServiceRegistry;
}
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