/**
 * Session Manager - Manages MCP client sessions and state
 *
 * This module handles session lifecycle, state management, and client communication
 */
import { Logger } from "../types.js";
export interface Session {
    id: string;
    clientId: string;
    startTime: Date;
    lastActivity: Date;
    state: SessionState;
    metadata: Record<string, unknown>;
}
export interface SessionState {
    currentWorkflow?: string;
    activeTools: string[];
    userPreferences: Record<string, unknown>;
    context: Record<string, unknown>;
}
export interface SessionManagerConfig {
    sessionTimeout?: number;
    maxSessions?: number;
    enablePersistence?: boolean;
    cleanupInterval?: number;
}
export declare class SessionManager {
    private sessions;
    private logger;
    private config;
    private cleanupTimer?;
    constructor(logger: Logger, config?: SessionManagerConfig);
    /**
     * Create a new session
     */
    createSession(clientId: string, metadata?: Record<string, unknown>): Session;
    /**
     * Get a session by ID
     */
    getSession(sessionId: string): Session | undefined;
    /**
     * Update session activity
     */
    updateActivity(sessionId: string): void;
    /**
     * Update session state
     */
    updateSessionState(sessionId: string, state: Partial<SessionState>): void;
    /**
     * Add active tool to session
     */
    addActiveTool(sessionId: string, toolName: string): void;
    /**
     * Remove active tool from session
     */
    removeActiveTool(sessionId: string, toolName: string): void;
    /**
     * Update user preferences
     */
    updateUserPreferences(sessionId: string, preferences: Record<string, unknown>): void;
    /**
     * Update session context
     */
    updateContext(sessionId: string, context: Record<string, unknown>): void;
    /**
     * End a session
     */
    endSession(sessionId: string): void;
    /**
     * Get all active sessions
     */
    getActiveSessions(): Session[];
    /**
     * Get session statistics
     */
    getSessionStats(): {
        totalSessions: number;
        activeSessions: number;
        averageSessionDuration: number;
    };
    /**
     * Generate unique session ID
     */
    private generateSessionId;
    /**
     * Start cleanup timer for expired sessions
     */
    private startCleanupTimer;
    /**
     * Clean up expired sessions
     */
    private cleanupExpiredSessions;
    /**
     * Enforce maximum number of sessions
     */
    private enforceMaxSessions;
    /**
     * Cleanup resources
     */
    destroy(): void;
}
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