/**
 * Zoe Gateway — MCPGateway engine
 *
 * Core engine that manages MCP and REST targets, routes requests,
 * and exposes injectable tools for the agent loop.
 */
import type { ToolModule } from '../tools/interface.js';
import { GatewaySettingsAdapter } from './settings-adapter.js';
import type { AuditRecord, GatewayConfig, GatewayHooks, Target } from './types.js';
export declare class MCPGateway {
    private targets;
    private mcpClients;
    private auditLogs;
    private routes;
    private adminTargets;
    private injectableToolsCache;
    private invalidateToolsCache;
    private settings;
    private config;
    private hooks;
    constructor(settings: GatewaySettingsAdapter, config: GatewayConfig, hooks?: GatewayHooks);
    initialize(): Promise<void>;
    shutdown(): Promise<void>;
    private audit;
    getAuditLogs(targetFilter?: string, limit?: number): AuditRecord[];
    getUsageSummary(): Record<string, {
        calls: number;
        errors: number;
    }>;
    registerTarget(name: string, target: Target, isAdmin?: boolean): Promise<void>;
    unregisterTarget(name: string): Promise<boolean>;
    toggleTarget(name: string, enabled: boolean): Promise<boolean>;
    getTargets(): Record<string, Target>;
    addRoute(pattern: string, target: string, priority: number): Promise<void>;
    removeRoute(pattern: string, target: string): Promise<void>;
    routeRequest(request: string): string;
    private connectMcpClient;
    callMcpTool(agent: string, targetName: string, toolName: string, args: Record<string, unknown>): Promise<any>;
    callRest(agent: string, targetName: string, reqPath: string, method: string, query?: Record<string, string>, body?: unknown): Promise<any>;
    readResource(agent: string, targetName: string, uri: string): Promise<any>;
    getPrompt(agent: string, targetName: string, name: string, args?: Record<string, string>): Promise<any>;
    getRoutes(): Array<{
        pattern: string;
        target: string;
        priority: number;
    }>;
    listCredentialKeys(): string[];
    setCredential(key: string, value: string): Promise<void>;
    deleteCredential(key: string): Promise<void>;
    getInjectableTools(): ToolModule[];
    private buildInjectableTools;
}