import { Client } from '@modelcontextprotocol/sdk/client/index.js';
import type { Root } from '@modelcontextprotocol/sdk/types.js';
import type { ElicitRequest, ElicitResult, McpSamplingParams, McpSamplingResult } from '@nest-mcp/common';
import { McpRegistryService } from '@nest-mcp/server';
import { type OnModuleDestroy } from '@nestjs/common';
import type { UpstreamConfig, UpstreamStatus } from './upstream.interface';
interface ManagedUpstream {
    config: UpstreamConfig;
    client: Client;
    connected: boolean;
    healthy: boolean;
    lastHealthCheck?: Date;
    error?: string;
}
export declare class UpstreamManagerService implements OnModuleDestroy {
    private readonly registry?;
    private readonly logger;
    private readonly upstreams;
    private readonly samplingForwarders;
    private readonly elicitForwarders;
    constructor(registry?: McpRegistryService | undefined);
    connectAll(configs: UpstreamConfig[], roots?: Root[]): Promise<void>;
    connect(config: UpstreamConfig, roots?: Root[]): Promise<void>;
    private createTransport;
    getClient(name: string): Client | undefined;
    getManaged(name: string): ManagedUpstream | undefined;
    isConnected(name: string): boolean;
    isHealthy(name: string): boolean;
    setHealthy(name: string, healthy: boolean, error?: string): void;
    getAllNames(): string[];
    getConfig(name: string): UpstreamConfig | undefined;
    getAllConfigs(): UpstreamConfig[];
    getStatus(name: string): UpstreamStatus | undefined;
    getAllStatuses(): UpstreamStatus[];
    disconnect(name: string): Promise<void>;
    disconnectAll(): Promise<void>;
    activateSampling(upstreamName: string, forwarder: (params: McpSamplingParams) => Promise<McpSamplingResult>): void;
    deactivateSampling(upstreamName: string): void;
    activateElicitation(upstreamName: string, forwarder: (params: ElicitRequest, options?: {
        signal?: AbortSignal;
    }) => Promise<ElicitResult>): void;
    deactivateElicitation(upstreamName: string): void;
    onModuleDestroy(): Promise<void>;
}
export {};
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