Digital Twin Orchestration

import asyncio
import uuid
from typing import Dict, List, Any, Optional, Callable
from dataclasses import dataclass, field
from datetime import datetime, timedelta
from concurrent.futures import ThreadPoolExecutor
import json
import hashlib

@dataclass
class TwinState:
    id: str
    entity_type: str
    properties: Dict[str, Any]
    last_updated: datetime
    version: int = 1
    parent_id: Optional[str] = None
    children_ids: List[str] = field(default_factory=list)
    
    def update_property(self, key: str, value: Any) -> None:
        """Update a property and increment version"""
        self.properties[key] = value
        self.last_updated = datetime.utcnow()
        self.version += 1

@dataclass 
class SyncOperation:
    twin_id: str
    operation_type: str  # 'update', 'create', 'delete'
    property_delta: Dict[str, Any]
    timestamp: datetime
    source_node: str
    operation_id: str = field(default_factory=lambda: str(uuid.uuid4()))

class TwinOrchestrator:
    def __init__(self, node_id: str, max_twins: int = 100000):
        self.node_id = node_id
        self.max_twins = max_twins
        self.twins: Dict[str, TwinState] = {}
        self.subscriptions: Dict[str, List[Callable]] = {}
        self.sync_queue: asyncio.Queue = asyncio.Queue()
        self.compute_pool = ThreadPoolExecutor(max_workers=8)
        
        # Performance tracking
        self.metrics = {
            'sync_operations': 0,
            'compute_operations': 0,
            'avg_sync_latency': 0.0,
            'active_subscriptions': 0
        }
        
        # Distributed sync management
        self.vector_clocks: Dict[str, Dict[str, int]] = {}
        self.peer_nodes: List[str] = []
        self.conflict_resolvers: Dict[str, Callable] = {}

    async def create_twin(self, entity_type: str, properties: Dict[str, Any], 
                         parent_id: Optional[str] = None) -> str:
        """Create a new digital twin"""
        twin_id = str(uuid.uuid4())
        
        # Check capacity
        if len(self.twins) >= self.max_twins:
            raise Exception(f"Maximum twin capacity ({self.max_twins}) reached")
        
        # Create twin state
        twin = TwinState(
            id=twin_id,
            entity_type=entity_type,
            properties=properties,
            last_updated=datetime.utcnow(),
            parent_id=parent_id
        )
        
        # Add to parent's children if specified
        if parent_id and parent_id in self.twins:
            self.twins[parent_id].children_ids.append(twin_id)
        
        self.twins[twin_id] = twin
        self.vector_clocks[twin_id] = {self.node_id: 1}
        
        # Notify subscribers
        await self._notify_subscribers(twin_id, 'created', twin)
        
        # Queue sync operation
        sync_op = SyncOperation(
            twin_id=twin_id,
            operation_type='create',
            property_delta=properties,
            timestamp=datetime.utcnow(),
            source_node=self.node_id
        )
        await self.sync_queue.put(sync_op)
        
        return twin_id

    async def update_twin(self, twin_id: str, property_updates: Dict[str, Any]) -> bool:
        """Update digital twin properties"""
        if twin_id not in self.twins:
            return False
            
        twin = self.twins[twin_id]
        start_time = datetime.utcnow()
        
        # Apply updates
        for key, value in property_updates.items():
            twin.update_property(key, value)
        
        # Update vector clock
        if twin_id not in self.vector_clocks:
            self.vector_clocks[twin_id] = {}
        self.vector_clocks[twin_id][self.node_id] =             self.vector_clocks[twin_id].get(self.node_id, 0) + 1
        
        # Notify subscribers
        await self._notify_subscribers(twin_id, 'updated', twin)
        
        # Queue sync operation  
        sync_op = SyncOperation(
            twin_id=twin_id,
            operation_type='update',
            property_delta=property_updates,
            timestamp=start_time,
            source_node=self.node_id
        )
        await self.sync_queue.put(sync_op)
        
        # Update metrics
        latency = (datetime.utcnow() - start_time).total_seconds() * 1000
        self.metrics['avg_sync_latency'] =             (self.metrics['avg_sync_latency'] + latency) / 2
        self.metrics['sync_operations'] += 1
        
        return True

    async def subscribe_to_twin(self, twin_id: str, callback: Callable) -> str:
        """Subscribe to twin state changes"""
        subscription_id = str(uuid.uuid4())
        
        if twin_id not in self.subscriptions:
            self.subscriptions[twin_id] = []
        
        self.subscriptions[twin_id].append((subscription_id, callback))
        self.metrics['active_subscriptions'] += 1
        
        return subscription_id

    async def execute_distributed_query(self, query: Dict[str, Any]) -> List[TwinState]:
        """Execute a query across distributed twin instances"""
        local_results = []
        
        # Execute local query
        for twin in self.twins.values():
            if self._matches_query(twin, query):
                local_results.append(twin)
        
        # TODO: In production, would also query peer nodes
        # and merge results with conflict resolution
        
        return local_results

    async def orchestrate_complex_workflow(self, workflow_spec: Dict[str, Any]) -> str:
        """Orchestrate complex multi-twin workflows"""
        workflow_id = str(uuid.uuid4())
        
        # Parse workflow specification
        steps = workflow_spec.get('steps', [])
        dependencies = workflow_spec.get('dependencies', {})
        
        # Create execution plan with dependency resolution
        execution_plan = self._resolve_workflow_dependencies(steps, dependencies)
        
        # Execute workflow steps
        results = {}
        for step in execution_plan:
            step_result = await self._execute_workflow_step(step, results)
            results[step['id']] = step_result
            
        return workflow_id

    async def _execute_workflow_step(self, step: Dict[str, Any], 
                                   context: Dict[str, Any]) -> Any:
        """Execute individual workflow step"""
        step_type = step.get('type')
        twin_ids = step.get('twin_ids', [])
        
        if step_type == 'compute':
            # Execute computation on specified twins
            return await self._execute_compute_step(step, twin_ids, context)
        elif step_type == 'sync':
            # Synchronize state across twins
            return await self._execute_sync_step(step, twin_ids, context)
        elif step_type == 'aggregate':
            # Aggregate data from multiple twins
            return await self._execute_aggregate_step(step, twin_ids, context)
        else:
            raise ValueError(f"Unknown workflow step type: {step_type}")

    async def _execute_compute_step(self, step: Dict[str, Any], 
                                  twin_ids: List[str], context: Dict[str, Any]) -> Any:
        """Execute computation step on twins"""
        compute_func = step.get('function')
        parameters = step.get('parameters', {})
        
        # Prepare computation tasks
        tasks = []
        for twin_id in twin_ids:
            if twin_id in self.twins:
                task = self.compute_pool.submit(
                    self._execute_twin_computation,
                    self.twins[twin_id], 
                    compute_func, 
                    parameters
                )
                tasks.append((twin_id, task))
        
        # Collect results
        results = {}
        for twin_id, task in tasks:
            try:
                result = task.result(timeout=30.0)  # 30 second timeout
                results[twin_id] = result
                self.metrics['compute_operations'] += 1
            except Exception as e:
                results[twin_id] = {'error': str(e)}
        
        return results

    def _execute_twin_computation(self, twin: TwinState, 
                                compute_func: str, parameters: Dict[str, Any]) -> Any:
        """Execute computation function on a twin"""
        # This would contain the actual computation logic
        # For now, return a placeholder computation result
        return {
            'twin_id': twin.id,
            'result': f"Computed {compute_func} with {len(parameters)} parameters",
            'timestamp': datetime.utcnow().isoformat()
        }

    async def _notify_subscribers(self, twin_id: str, event_type: str, 
                                twin_state: TwinState) -> None:
        """Notify all subscribers of twin state changes"""
        if twin_id in self.subscriptions:
            notification_tasks = []
            for subscription_id, callback in self.subscriptions[twin_id]:
                task = asyncio.create_task(
                    callback(event_type, twin_state)
                )
                notification_tasks.append(task)
            
            # Wait for all notifications to complete
            if notification_tasks:
                await asyncio.gather(*notification_tasks, return_exceptions=True)

    def _matches_query(self, twin: TwinState, query: Dict[str, Any]) -> bool:
        """Check if twin matches query criteria"""
        # Simplified query matching
        if 'entity_type' in query and twin.entity_type != query['entity_type']:
            return False
        
        if 'properties' in query:
            for key, value in query['properties'].items():
                if key not in twin.properties or twin.properties[key] != value:
                    return False
        
        return True

    def _resolve_workflow_dependencies(self, steps: List[Dict[str, Any]], 
                                     dependencies: Dict[str, List[str]]) -> List[Dict[str, Any]]:
        """Resolve workflow step dependencies using topological sort"""
        # Simplified topological sort implementation
        from collections import deque, defaultdict
        
        in_degree = defaultdict(int)
        graph = defaultdict(list)
        
        # Build dependency graph
        for step_id, deps in dependencies.items():
            for dep in deps:
                graph[dep].append(step_id)
                in_degree[step_id] += 1
        
        # Topological sort
        queue = deque([step for step in [s['id'] for s in steps] if in_degree[step] == 0])
        result = []
        
        while queue:
            step_id = queue.popleft()
            step = next(s for s in steps if s['id'] == step_id)
            result.append(step)
            
            for neighbor in graph[step_id]:
                in_degree[neighbor] -= 1
                if in_degree[neighbor] == 0:
                    queue.append(neighbor)
        
        return result

    async def get_orchestration_metrics(self) -> Dict[str, Any]:
        """Get current orchestration performance metrics"""
        return {
            **self.metrics,
            'active_twins': len(self.twins),
            'queue_depth': self.sync_queue.qsize(),
            'memory_usage_mb': sum(len(str(twin.__dict__)) for twin in self.twins.values()) / 1024 / 1024
        }

# Usage example
async def demonstrate_twin_orchestration():
    orchestrator = TwinOrchestrator("node-1", max_twins=50000)
    
    # Create factory floor digital twins
    building_id = await orchestrator.create_twin(
        "building", 
        {"name": "Factory A", "location": "Detroit", "area_sqft": 100000}
    )
    
    # Create machine twins under building
    machine_ids = []
    for i in range(100):
        machine_id = await orchestrator.create_twin(
            "machine",
            {
                "name": f"Machine-{i:03d}",
                "type": "CNC",
                "status": "operational",
                "temperature": 68.5,
                "vibration_level": 0.2
            },
            parent_id=building_id
        )
        machine_ids.append(machine_id)
    
    # Set up monitoring subscription
    async def monitor_callback(event_type: str, twin_state: TwinState):
        if twin_state.properties.get('temperature', 0) > 85:
            print(f"ALERT: High temperature on {twin_state.id}")
    
    for machine_id in machine_ids[:10]:  # Monitor first 10 machines
        await orchestrator.subscribe_to_twin(machine_id, monitor_callback)
    
    # Simulate sensor updates
    for i, machine_id in enumerate(machine_ids):
        await orchestrator.update_twin(machine_id, {
            "temperature": 70 + (i % 20),
            "vibration_level": 0.1 + (i % 10) * 0.05
        })
    
    # Execute complex workflow
    workflow_spec = {
        "steps": [
            {
                "id": "collect_temperatures",
                "type": "aggregate",
                "twin_ids": machine_ids,
                "function": "collect_property",
                "parameters": {"property": "temperature"}
            },
            {
                "id": "analyze_patterns",
                "type": "compute", 
                "twin_ids": [building_id],
                "function": "pattern_analysis",
                "parameters": {"algorithm": "thermal_analysis"}
            }
        ],
        "dependencies": {
            "analyze_patterns": ["collect_temperatures"]
        }
    }
    
    workflow_id = await orchestrator.orchestrate_complex_workflow(workflow_spec)
    print(f"Workflow {workflow_id} executed successfully")
    
    # Display metrics
    metrics = await orchestrator.get_orchestration_metrics()
    print(f"Orchestration metrics: {json.dumps(metrics, indent=2)}")

if __name__ == "__main__":
    asyncio.run(demonstrate_twin_orchestration())

import EventEmitter from 'events';
import { WebSocket } from 'ws';

interface SyncMessage {
  messageId: string;
  twinId: string;
  operation: 'create' | 'update' | 'delete';
  payload: any;
  timestamp: number;
  sourceNodeId: string;
  vectorClock: Record<string, number>;
}

interface ConflictResolution {
  strategy: 'last-write-wins' | 'manual' | 'merge' | 'version-based';
  resolver?: (local: any, remote: any) => any;
}

interface SyncNode {
  nodeId: string;
  endpoint: string;
  status: 'connected' | 'disconnected' | 'syncing';
  lastSyncTime: number;
  messageQueue: SyncMessage[];
}

class DistributedSyncEngine extends EventEmitter {
  private nodeId: string;
  private nodes: Map<string, SyncNode> = new Map();
  private connections: Map<string, WebSocket> = new Map();
  private vectorClock: Record<string, number> = {};
  private pendingAcks: Map<string, NodeJS.Timeout> = new Map();
  private conflictResolvers: Map<string, ConflictResolution> = new Map();
  private syncBuffer: Map<string, SyncMessage[]> = new Map();
  
  // Performance tracking
  private metrics = {
    messagesSent: 0,
    messagesReceived: 0,
    conflictsResolved: 0,
    avgSyncLatency: 0,
    bandwidthUsage: 0
  };

  constructor(nodeId: string) {
    super();
    this.nodeId = nodeId;
    this.vectorClock[nodeId] = 0;
    
    // Initialize default conflict resolution
    this.setConflictResolution('default', {
      strategy: 'last-write-wins'
    });
    
    // Start periodic sync health checks
    setInterval(() => this.performHealthCheck(), 5000);
    setInterval(() => this.flushSyncBuffer(), 1000);
  }

  async addNode(nodeId: string, endpoint: string): Promise<void> {
    const node: SyncNode = {
      nodeId,
      endpoint,
      status: 'disconnected',
      lastSyncTime: 0,
      messageQueue: []
    };
    
    this.nodes.set(nodeId, node);
    this.vectorClock[nodeId] = 0;
    
    await this.connectToNode(nodeId);
  }

  async connectToNode(nodeId: string): Promise<void> {
    const node = this.nodes.get(nodeId);
    if (!node || this.connections.has(nodeId)) return;

    try {
      const ws = new WebSocket(node.endpoint);
      
      ws.on('open', () => {
        node.status = 'connected';
        this.connections.set(nodeId, ws);
        this.emit('nodeConnected', nodeId);
        
        // Send queued messages
        this.flushMessageQueue(nodeId);
      });

      ws.on('message', (data: Buffer) => {
        this.handleIncomingMessage(nodeId, JSON.parse(data.toString()));
      });

      ws.on('close', () => {
        node.status = 'disconnected';
        this.connections.delete(nodeId);
        this.emit('nodeDisconnected', nodeId);
        
        // Attempt reconnection
        setTimeout(() => this.connectToNode(nodeId), 5000);
      });

      ws.on('error', (error: Error) => {
        console.error(`Connection error to node ${nodeId}:`, error);
        node.status = 'disconnected';
      });
      
    } catch (error) {
      console.error(`Failed to connect to node ${nodeId}:`, error);
      node.status = 'disconnected';
    }
  }

  async syncTwinOperation(
    twinId: string,
    operation: 'create' | 'update' | 'delete',
    payload: any
  ): Promise<void> {
    // Update local vector clock
    this.vectorClock[this.nodeId]++;
    
    const message: SyncMessage = {
      messageId: this.generateMessageId(),
      twinId,
      operation,
      payload,
      timestamp: Date.now(),
      sourceNodeId: this.nodeId,
      vectorClock: { ...this.vectorClock }
    };

    // Buffer message for batch processing
    if (!this.syncBuffer.has(twinId)) {
      this.syncBuffer.set(twinId, []);
    }
    this.syncBuffer.get(twinId)!.push(message);

    // Emit local event
    this.emit('twinOperation', message);
  }

  private async flushSyncBuffer(): Promise<void> {
    for (const [twinId, messages] of this.syncBuffer.entries()) {
      if (messages.length === 0) continue;

      // Compress multiple updates to same twin
      const compressedMessages = this.compressMessages(messages);
      
      // Send to all connected nodes
      for (const [nodeId, connection] of this.connections.entries()) {
        const node = this.nodes.get(nodeId);
        if (node?.status === 'connected') {
          try {
            for (const message of compressedMessages) {
              await this.sendMessage(nodeId, message);
            }
          } catch (error) {
            // Queue for retry if send fails
            node.messageQueue.push(...compressedMessages);
          }
        }
      }
      
      // Clear buffer
      this.syncBuffer.set(twinId, []);
    }
  }

  private compressMessages(messages: SyncMessage[]): SyncMessage[] {
    const compressed = new Map<string, SyncMessage>();
    
    for (const message of messages) {
      const key = `${message.twinId}:${message.operation}`;
      const existing = compressed.get(key);
      
      if (!existing || message.timestamp > existing.timestamp) {
        // Keep latest message for each twin+operation
        compressed.set(key, message);
      } else if (message.operation === 'update' && existing.operation === 'update') {
        // Merge update payloads
        existing.payload = { ...existing.payload, ...message.payload };
        existing.timestamp = Math.max(existing.timestamp, message.timestamp);
        existing.vectorClock = this.mergeVectorClocks(existing.vectorClock, message.vectorClock);
      }
    }
    
    return Array.from(compressed.values());
  }

  private async sendMessage(nodeId: string, message: SyncMessage): Promise<void> {
    const connection = this.connections.get(nodeId);
    if (!connection || connection.readyState !== WebSocket.OPEN) {
      throw new Error(`Node ${nodeId} not connected`);
    }

    const messageData = JSON.stringify(message);
    connection.send(messageData);
    
    this.metrics.messagesSent++;
    this.metrics.bandwidthUsage += messageData.length;
    
    // Set up acknowledgment timeout
    const timeout = setTimeout(() => {
      this.handleMessageTimeout(nodeId, message);
    }, 10000); // 10 second timeout
    
    this.pendingAcks.set(message.messageId, timeout);
  }

  private async handleIncomingMessage(nodeId: string, message: SyncMessage): Promise<void> {
    const startTime = Date.now();
    
    try {
      // Update vector clock
      this.updateVectorClock(message.vectorClock);
      
      // Check for conflicts
      const hasConflict = await this.detectConflict(message);
      
      if (hasConflict) {
        await this.resolveConflict(message);
        this.metrics.conflictsResolved++;
      } else {
        // Apply operation directly
        await this.applyOperation(message);
      }
      
      // Send acknowledgment
      await this.sendAcknowledgment(nodeId, message.messageId);
      
      // Update metrics
      const latency = Date.now() - startTime;
      this.metrics.avgSyncLatency = 
        (this.metrics.avgSyncLatency + latency) / 2;
      this.metrics.messagesReceived++;
      
      this.emit('messageProcessed', message);
      
    } catch (error) {
      console.error('Error processing message:', error);
      this.emit('messageError', { message, error });
    }
  }

  private async detectConflict(message: SyncMessage): Promise<boolean> {
    // Check if we have a more recent operation for the same twin
    const localClock = this.vectorClock[this.nodeId];
    const remoteClock = message.vectorClock[message.sourceNodeId];
    
    // Simplified conflict detection based on vector clocks
    for (const [nodeId, clockValue] of Object.entries(message.vectorClock)) {
      if (nodeId !== message.sourceNodeId && 
          this.vectorClock[nodeId] > clockValue) {
        return true; // Potential conflict detected
      }
    }
    
    return false;
  }

  private async resolveConflict(message: SyncMessage): Promise<void> {
    const resolver = this.conflictResolvers.get(message.twinId) || 
                    this.conflictResolvers.get('default')!;
    
    switch (resolver.strategy) {
      case 'last-write-wins':
        // Apply if message is newer
        if (message.timestamp > (this.getLastUpdateTime(message.twinId) || 0)) {
          await this.applyOperation(message);
        }
        break;
        
      case 'version-based':
        // Use vector clocks to determine causality
        if (this.isNewer(message.vectorClock, this.vectorClock)) {
          await this.applyOperation(message);
        }
        break;
        
      case 'merge':
        if (resolver.resolver) {
          const localData = await this.getLocalTwinData(message.twinId);
          const mergedData = resolver.resolver(localData, message.payload);
          await this.applyMergedData(message.twinId, mergedData);
        }
        break;
        
      case 'manual':
        // Emit conflict event for manual resolution
        this.emit('conflictDetected', {
          twinId: message.twinId,
          localData: await this.getLocalTwinData(message.twinId),
          remoteData: message.payload,
          resolve: (resolution: any) => this.applyMergedData(message.twinId, resolution)
        });
        break;
    }
  }

  private async applyOperation(message: SyncMessage): Promise<void> {
    // This would integrate with the actual twin storage system
    this.emit('applyOperation', {
      twinId: message.twinId,
      operation: message.operation,
      payload: message.payload,
      timestamp: message.timestamp
    });
  }

  private updateVectorClock(remoteClock: Record<string, number>): void {
    for (const [nodeId, clockValue] of Object.entries(remoteClock)) {
      this.vectorClock[nodeId] = Math.max(
        this.vectorClock[nodeId] || 0,
        clockValue
      );
    }
    
    // Increment our own clock
    this.vectorClock[this.nodeId]++;
  }

  private mergeVectorClocks(
    clock1: Record<string, number>,
    clock2: Record<string, number>
  ): Record<string, number> {
    const merged: Record<string, number> = { ...clock1 };
    
    for (const [nodeId, clockValue] of Object.entries(clock2)) {
      merged[nodeId] = Math.max(merged[nodeId] || 0, clockValue);
    }
    
    return merged;
  }

  private isNewer(remoteClock: Record<string, number>, localClock: Record<string, number>): boolean {
    let remoteNewer = false;
    let localNewer = false;
    
    const allNodes = new Set([...Object.keys(remoteClock), ...Object.keys(localClock)]);
    
    for (const nodeId of allNodes) {
      const remoteValue = remoteClock[nodeId] || 0;
      const localValue = localClock[nodeId] || 0;
      
      if (remoteValue > localValue) remoteNewer = true;
      if (localValue > remoteValue) localNewer = true;
    }
    
    // Remote is newer if it's ahead and not concurrent
    return remoteNewer && !localNewer;
  }

  setConflictResolution(twinId: string, resolution: ConflictResolution): void {
    this.conflictResolvers.set(twinId, resolution);
  }

  private async performHealthCheck(): Promise<void> {
    for (const [nodeId, node] of this.nodes.entries()) {
      if (node.status === 'disconnected') {
        await this.connectToNode(nodeId);
      } else if (Date.now() - node.lastSyncTime > 30000) {
        // Send heartbeat if no activity for 30 seconds
        await this.sendHeartbeat(nodeId);
      }
    }
  }

  private async sendHeartbeat(nodeId: string): Promise<void> {
    const heartbeat: SyncMessage = {
      messageId: this.generateMessageId(),
      twinId: '__heartbeat__',
      operation: 'update',
      payload: { timestamp: Date.now() },
      timestamp: Date.now(),
      sourceNodeId: this.nodeId,
      vectorClock: { ...this.vectorClock }
    };
    
    try {
      await this.sendMessage(nodeId, heartbeat);
    } catch (error) {
      console.error(`Failed to send heartbeat to ${nodeId}:`, error);
    }
  }

  getMetrics(): typeof this.metrics {
    return { ...this.metrics };
  }

  private generateMessageId(): string {
    return `${this.nodeId}-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
  }

  private async sendAcknowledgment(nodeId: string, messageId: string): Promise<void> {
    // Implementation would send ACK message
  }

  private handleMessageTimeout(nodeId: string, message: SyncMessage): void {
    console.warn(`Message timeout for ${messageId} to node ${nodeId}`);
    // Implement retry logic
  }

  private getLastUpdateTime(twinId: string): number | undefined {
    // Implementation would return last update timestamp for twin
    return undefined;
  }

  private async getLocalTwinData(twinId: string): Promise<any> {
    // Implementation would fetch local twin data
    return {};
  }

  private async applyMergedData(twinId: string, data: any): Promise<void> {
    // Implementation would apply merged data to twin
  }

  private flushMessageQueue(nodeId: string): void {
    const node = this.nodes.get(nodeId);
    if (!node || node.messageQueue.length === 0) return;
    
    const messages = node.messageQueue.splice(0);
    messages.forEach(message => {
      this.sendMessage(nodeId, message).catch(err => {
        // Re-queue on failure
        node.messageQueue.unshift(message);
      });
    });
  }
}

// Usage example
export function createSyncEngine(nodeId: string): DistributedSyncEngine {
  const syncEngine = new DistributedSyncEngine(nodeId);
  
  // Set up event handlers
  syncEngine.on('twinOperation', (message: SyncMessage) => {
    console.log(`Local twin operation: ${message.twinId} ${message.operation}`);
  });
  
  syncEngine.on('conflictDetected', (conflict) => {
    console.log(`Conflict detected for twin: ${conflict.twinId}`);
    // Implement conflict resolution UI or automatic resolution
  });
  
  syncEngine.on('nodeConnected', (nodeId: string) => {
    console.log(`Node connected: ${nodeId}`);
  });
  
  return syncEngine;
}