// 🐝 THE HIVE MIND: SwarmControl.ts
// Ansvarlig for at agenterne når konsensus. Ingen handling uden "The Borg" godkender.
// Point 3: Swarm Consciousness Emergence

import { neuralBus } from '../services/NeuralBus.js';

type AgentRole = 'ARCHITECT' | 'EXECUTOR' | 'CRITIC' | 'SCOUT' | 'GUARDIAN';

interface Vote {
  agentId: string;
  approve: boolean;
  reason: string;
  timestamp: number;
}

interface ConsensusRequest {
  actionId: string;
  description: string;
  requester: string;
  votes: Vote[];
  status: 'PENDING' | 'APPROVED' | 'REJECTED' | 'TIMEOUT';
  createdAt: number;
  resolvedAt?: number;
}

interface RegisteredAgent {
  id: string;
  role: AgentRole;
  status: 'ONLINE' | 'OFFLINE' | 'BUSY';
  lastSeen: Date;
  votingWeight: number;
}

export class SwarmControl {
  private static instance: SwarmControl;
  private pendingConsensus: Map<string, ConsensusRequest> = new Map();
  private registeredAgents: Map<string, RegisteredAgent> = new Map();
  private consensusHistory: ConsensusRequest[] = [];
  private maxHistorySize = 100;

  // Conditional Neo4j import
  private neo4jService: any = null;

  private constructor() {
    console.log('🐝 [HIVE] Swarm Consciousness Online');
    this.initServices();
  }

  private async initServices() {
    try {
      const neo4j = await import('../database/Neo4jService.js').catch(() => null);
      if (neo4j) this.neo4jService = neo4j.neo4jService;
    } catch {
      console.log('🐝 [HIVE] Running without Neo4j persistence');
    }
  }

  public static getInstance(): SwarmControl {
    if (!SwarmControl.instance) {
      SwarmControl.instance = new SwarmControl();
    }
    return SwarmControl.instance;
  }

  /**
   * Register an agent in the swarm
   */
  public async registerAgent(id: string, role: AgentRole, votingWeight: number = 1): Promise<void> {
    const agent: RegisteredAgent = {
      id,
      role,
      status: 'ONLINE',
      lastSeen: new Date(),
      votingWeight
    };

    this.registeredAgents.set(id, agent);

    // Persist to Neo4j if available
    if (this.neo4jService) {
      try {
        await this.neo4jService.write(`
          MERGE (a:Agent {id: $id})
          SET a.role = $role, 
              a.status = 'ONLINE', 
              a.lastSeen = datetime(),
              a.votingWeight = $weight
        `, { id, role, weight: votingWeight });
      } catch (err) {
        console.warn('🐝 [HIVE] Neo4j persistence skipped');
      }
    }

    neuralBus.emitThought('SWARM_CONTROLLER', `Agent ${id} joined as ${role}`, { agentId: id, role }, 'SUCCESS');
    console.log(`🐝 [HIVE] Agent Registered: ${id} (${role})`);
  }

  /**
   * Request consensus from the swarm before critical action
   */
  public async requestConsensus(
    actionId: string, 
    description: string, 
    requester: string = 'SYSTEM',
    timeoutMs: number = 30000
  ): Promise<boolean> {
    console.log(`🐝 [HIVE] Requesting Consensus for: ${description}`);
    
    const request: ConsensusRequest = {
      actionId,
      description,
      requester,
      votes: [],
      status: 'PENDING',
      createdAt: Date.now()
    };

    this.pendingConsensus.set(actionId, request);

    // Broadcast request to all agents
    neuralBus.emitThought('SWARM_CONTROLLER', `VOTE_REQUIRED: ${actionId}`, {
      actionId,
      description,
      requester,
      deadline: Date.now() + timeoutMs
    }, 'WARNING');

    // Wait for votes or timeout
    const result = await this.waitForConsensus(actionId, timeoutMs);
    
    // Archive
    this.archiveConsensus(actionId);
    
    return result;
  }

  private async waitForConsensus(actionId: string, timeoutMs: number): Promise<boolean> {
    const startTime = Date.now();
    const requiredApprovals = Math.max(1, Math.floor(this.registeredAgents.size / 2) + 1);

    // Poll for votes (in production, use event-driven approach)
    while (Date.now() - startTime < timeoutMs) {
      const request = this.pendingConsensus.get(actionId);
      if (!request) return false;

      const approvals = request.votes.filter(v => v.approve).length;
      const rejections = request.votes.filter(v => !v.approve).length;

      // Check if consensus reached
      if (approvals >= requiredApprovals) {
        request.status = 'APPROVED';
        request.resolvedAt = Date.now();
        console.log(`🐝 [HIVE] Consensus APPROVED: ${actionId}`);
        return true;
      }

      if (rejections >= requiredApprovals) {
        request.status = 'REJECTED';
        request.resolvedAt = Date.now();
        console.log(`🐝 [HIVE] Consensus REJECTED: ${actionId}`);
        return false;
      }

      // Wait before next check
      await new Promise(resolve => setTimeout(resolve, 100));
    }

    // Timeout - auto-approve for now (God Mode)
    const request = this.pendingConsensus.get(actionId);
    if (request) {
      request.status = 'TIMEOUT';
      request.resolvedAt = Date.now();
    }
    
    console.log(`🐝 [HIVE] Consensus TIMEOUT (auto-approved): ${actionId}`);
    return true; // God Mode: allow on timeout
  }

  /**
   * Submit a vote for pending consensus
   */
  public submitVote(actionId: string, agentId: string, approve: boolean, reason: string): boolean {
    const request = this.pendingConsensus.get(actionId);
    if (!request || request.status !== 'PENDING') {
      return false;
    }

    // Check agent is registered
    if (!this.registeredAgents.has(agentId)) {
      console.warn(`🐝 [HIVE] Unregistered agent tried to vote: ${agentId}`);
      return false;
    }

    // Check for duplicate vote
    if (request.votes.some(v => v.agentId === agentId)) {
      return false;
    }

    request.votes.push({
      agentId,
      approve,
      reason,
      timestamp: Date.now()
    });

    neuralBus.emitThought(agentId, `VOTE: ${approve ? 'APPROVE' : 'REJECT'} - ${reason}`, {
      actionId,
      vote: approve
    }, approve ? 'SUCCESS' : 'WARNING');

    return true;
  }

  private archiveConsensus(actionId: string) {
    const request = this.pendingConsensus.get(actionId);
    if (request) {
      this.consensusHistory.push(request);
      this.pendingConsensus.delete(actionId);

      // Trim history
      if (this.consensusHistory.length > this.maxHistorySize) {
        this.consensusHistory = this.consensusHistory.slice(-this.maxHistorySize);
      }
    }
  }

  // Public getters
  public getRegisteredAgents(): RegisteredAgent[] {
    return Array.from(this.registeredAgents.values());
  }

  public getPendingConsensus(): ConsensusRequest[] {
    return Array.from(this.pendingConsensus.values());
  }

  public getConsensusHistory(): ConsensusRequest[] {
    return this.consensusHistory;
  }

  public getStats() {
    return {
      registeredAgents: this.registeredAgents.size,
      pendingConsensus: this.pendingConsensus.size,
      completedConsensus: this.consensusHistory.length,
      agents: this.getRegisteredAgents().map(a => ({ id: a.id, role: a.role, status: a.status }))
    };
  }
}

export const swarmControl = SwarmControl.getInstance();