package org.batfish.coordinator.queues;

import java.util.Iterator;
import java.util.UUID;

import org.batfish.coordinator.QueuedWork;

import com.microsoft.azure.storage.CloudStorageAccount;
import com.microsoft.azure.storage.queue.CloudQueue;
import com.microsoft.azure.storage.queue.CloudQueueClient;

public class AzureQueue implements WorkQueue {

   private CloudQueue _queue;

   public AzureQueue(String queueName, String storageConnectionString) {
      try {
         // Retrieve storage account from connection-string.
         CloudStorageAccount storageAccount = CloudStorageAccount
               .parse(storageConnectionString);

         // Create the queue client.
         CloudQueueClient queueClient = storageAccount.createCloudQueueClient();

         // Retrieve a reference to a queue.
         _queue = queueClient.getQueueReference(queueName);

         // Create the queue if it doesn't already exist.
         _queue.createIfNotExists();
      }
      catch (Exception e) {
         // Output the stack trace.
         e.printStackTrace();
      }
   }

   @Override
   public boolean delete(QueuedWork qWork) {
      throw new UnsupportedOperationException(
            "no implementation for generated method"); // TODO Auto-generated
                                                       // method stub
   }

   @Override
   public QueuedWork deque() {
      throw new UnsupportedOperationException(
            "no implementation for generated method"); // TODO Auto-generated
                                                       // method stub
   }

   @Override
   public boolean enque(QueuedWork work) {
      throw new UnsupportedOperationException(
            "no implementation for generated method"); // TODO Auto-generated
                                                       // method stub
   }

   @Override
   public long getLength() {
      try {
         // Download the approximate message count from the server.
         _queue.downloadAttributes();

         // Retrieve the newly cached approximate message count.
         return _queue.getApproximateMessageCount();
      }
      catch (Exception e) {
         e.printStackTrace();
         return -1;
      }
   }

   @Override
   public QueuedWork getWork(UUID workItemId) {
      throw new UnsupportedOperationException(
            "no implementation for generated method"); // TODO Auto-generated
                                                       // method stub
   }

   @Override
   public Iterator<QueuedWork> iterator() {
      throw new UnsupportedOperationException(
            "no implementation for generated method"); // TODO Auto-generated
                                                       // method stub
   }
}