/*
    * 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.internal.aether;
  
  import java.io.FileNotFoundException;
  import org.eclipse.aether.AbstractRepositoryListener;
  import org.eclipse.aether.RepositoryEvent;
  import org.eclipse.aether.transfer.MetadataNotFoundException;
  import org.slf4j.Logger;
  
  /**
   * @author Benjamin Bentmann
   */
  class LoggingRepositoryListener extends AbstractRepositoryListener {
  
      private final Logger logger;
  
      LoggingRepositoryListener(Logger logger) {
          this.logger = logger;
      }
  
      @Override
      public void artifactInstalling(RepositoryEvent event) {
          logger.info("Installing " + event.getArtifact().getFile() + " to " + event.getFile());
      }
  
      @Override
      public void metadataInstalling(RepositoryEvent event) {
          logger.debug("Installing " + event.getMetadata() + " to " + event.getFile());
      }
  
      @Override
      public void metadataResolved(RepositoryEvent event) {
          Exception e = event.getException();
          if (e != null) {
              if (e instanceof MetadataNotFoundException) {
                  logger.debug(e.getMessage());
              } else if (logger.isDebugEnabled()) {
                  logger.warn(e.getMessage(), e);
              } else {
                  logger.warn(e.getMessage());
              }
          }
      }
  
      @Override
      public void metadataInvalid(RepositoryEvent event) {
          Exception exception = event.getException();
  
          StringBuilder buffer = new StringBuilder(256);
          buffer.append("The metadata ");
          if (event.getMetadata().getFile() != null) {
              buffer.append(event.getMetadata().getFile());
          } else {
              buffer.append(event.getMetadata());
          }
  
          if (exception instanceof FileNotFoundException) {
              buffer.append(" is inaccessible");
          } else {
              buffer.append(" is invalid");
          }
  
          if (exception != null) {
              buffer.append(": ");
              buffer.append(exception.getMessage());
          }
  
          if (logger.isDebugEnabled()) {
              logger.warn(buffer.toString(), exception);
          } else {
              logger.warn(buffer.toString());
          }
      }
  
      @Override
      public void artifactDescriptorInvalid(RepositoryEvent event) {
          StringBuilder buffer = new StringBuilder(256);
          buffer.append("The POM for ");
          buffer.append(event.getArtifact());
          buffer.append(" is invalid, transitive dependencies (if any) will not be available");
  
          if (logger.isDebugEnabled()) {
             logger.warn(buffer + ": " + event.getException().getMessage());
         } else {
             logger.warn(buffer + ", enable verbose output (-X) for more details");
         }
     }
 
     @Override
     public void artifactDescriptorMissing(RepositoryEvent event) {
         logger.warn("The POM for " + event.getArtifact() + " is missing, no dependency information available");
     }
 }