/**
 * Persistent Session Manager
 * Manages persistent terminal sessions across server restarts
 */

export interface PersistentSession {
  id: string;
  type: string;
  status: string;
  createdAt: string;
  lastActivity: string;
  metadata: Record<string, any>;
}

export class PersistentSessionManager {
  private sessions = new Map<string, PersistentSession>();

  restoreSession(sessionId: string): boolean {
    // Stub implementation
    return false;
  }

  saveSession(sessionId: string, agentId: string, metadata: Record<string, any>): void {
    // Stub implementation
    this.sessions.set(sessionId, {
      id: sessionId,
      type: 'terminal',
      status: 'active',
      createdAt: new Date().toISOString(),
      lastActivity: new Date().toISOString(),
      metadata
    });
  }

  listSessions(): PersistentSession[] {
    return Array.from(this.sessions.values());
  }

  deleteSession(sessionId: string): void {
    this.sessions.delete(sessionId);
  }

  updateActivity(sessionId: string): void {
    const session = this.sessions.get(sessionId);
    if (session) {
      session.lastActivity = new Date().toISOString();
    }
  }
  
  // Additional async methods for compatibility
  async createSession(id: string) {
    this.saveSession(id, id, {});
    return { id, created: new Date().toISOString() };
  }
  
  async getSession(id: string) {
    return this.sessions.get(id) || null;
  }
  
  async destroySession(id: string) {
    this.deleteSession(id);
    return true;
  }
}

// Singleton instance
let instance: PersistentSessionManager | null = null;

export function getPersistentSessionManager(): PersistentSessionManager {
  if (!instance) {
    instance = new PersistentSessionManager();
  }
  return instance;
}

// Export type for usage in other files
export type { PersistentSessionManager as PersistentSessionManagerType };

export default PersistentSessionManager;