/**
 * Consensus Coordinator
 * Byzantine fault-tolerant coordination
 */

const SwarmUtils = require('./swarm-utils.cjs');

class ConsensusCoordinator {
  constructor(swarm) {
    this.swarm = swarm;
    this.nodes = [];
    this.consensus = null;
  }

  initialize(nodes = []) {
    console.log('⚖️  Initializing consensus coordinator...');
    this.nodes = nodes;

    this.swarm.log('info', `Consensus coordination mode activated with ${nodes.length} nodes`);

    // Initialize consensus protocol
    this.initializeConsensus();
  }

  initializeConsensus() {
    this.swarm.log('debug', 'Initializing consensus protocol (Byzantine fault-tolerant)');

    // Simple consensus: majority voting
    this.votes = new Map();
  }

  async coordinate(task) {
    this.swarm.log('info', `Processing task via consensus: ${task}`);

    // Collect votes from nodes
    const votes = await this.collectVotes(task);

    // Achieve consensus
    const result = this.achieveConsensus(votes);

    return result;
  }

  async collectVotes(task) {
    this.swarm.log('debug', `Collecting votes from ${this.nodes.length} nodes`);

    const votes = [];

    for (const node of this.nodes) {
      const vote = await this.getVote(node, task);
      votes.push(vote);

      this.swarm.log('info', `Vote received from ${node}: ${vote}`);
    }

    return votes;
  }

  async getVote(node, task) {
    // Simulate Byzantine fault tolerance
    const isByzantine = Math.random() < 0.1; // 10% chance of faulty node

    if (isByzantine) {
      this.swarm.log('warning', `Byzantine node detected: ${node}`);
      return 'reject';
    }

    return 'accept';
  }

  achieveConsensus(votes) {
    // Majority voting
    const acceptCount = votes.filter(v => v === 'accept').length;
    const rejectCount = votes.filter(v => v === 'reject').length;

    const result = {
      agent: 'consensus-aggregated',
      success: acceptCount > rejectCount,
      timestamp: Date.now(),
      votes: {
        accept: acceptCount,
        reject: rejectCount
      },
      consensus: acceptCount > rejectCount ? 'reached' : 'failed',
      findings: [
        'Votes collected',
        'Consensus achieved',
        'Decision made'
      ]
    };

    this.swarm.log('success', `Consensus achieved: ${result.consensus}`);

    return result;
  }

  async stopSync() {
    this.swarm.log('info', 'Consensus coordinator stopped');
  }
}

module.exports = ConsensusCoordinator;