/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.maven.resolver.internal.ant;
  
  import java.text.DecimalFormat;
  import java.text.DecimalFormatSymbols;
  import java.util.Locale;
  
  import org.apache.tools.ant.Project;
  import org.apache.tools.ant.Task;
  import org.eclipse.aether.transfer.AbstractTransferListener;
  import org.eclipse.aether.transfer.TransferCancelledException;
  import org.eclipse.aether.transfer.TransferEvent;
  import org.eclipse.aether.transfer.TransferResource;
  
  /**
   * Logs up- and downloads.
   */
  class AntTransferListener extends AbstractTransferListener {
  
      private final Task task;
  
      AntTransferListener(final Task task) {
          this.task = task;
      }
  
      @Override
      public void transferInitiated(final TransferEvent event) throws TransferCancelledException {
          String msg = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploading" : "Downloading";
          msg += " " + event.getResource().getRepositoryUrl()
                  + event.getResource().getResourceName();
          task.log(msg);
      }
  
      @Override
      public void transferCorrupted(final TransferEvent event) throws TransferCancelledException {
          final TransferResource resource = event.getResource();
  
          task.log(
                  event.getException().getMessage() + " for " + resource.getRepositoryUrl() + resource.getResourceName(),
                  Project.MSG_WARN);
      }
  
      @Override
      public void transferSucceeded(final TransferEvent event) {
          String msg = event.getRequestType() == TransferEvent.RequestType.PUT ? "Uploaded" : "Downloaded";
          msg += " " + event.getResource().getRepositoryUrl()
                  + event.getResource().getResourceName();
  
          final long contentLength = event.getTransferredBytes();
          if (contentLength >= 0) {
              final String len = contentLength >= 1024 ? ((contentLength + 1023) / 1024) + " KB" : contentLength + " B";
  
              String throughput = "";
              final long duration =
                      System.currentTimeMillis() - event.getResource().getTransferStartTime();
              if (duration > 0) {
                  final DecimalFormat format = new DecimalFormat("0.0", new DecimalFormatSymbols(Locale.ENGLISH));
                  final double kbPerSec = (contentLength / 1024.0) / (duration / 1000.0);
                  throughput = " at " + format.format(kbPerSec) + " KB/sec";
              }
  
              msg += " (" + len + throughput + ")";
          }
          task.log(msg);
      }
  }