/*
    * 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;
  
  /**
   */
  class LoggingRepositoryListener extends AbstractRepositoryListener {
  
      private final Logger logger;
  
      LoggingRepositoryListener(Logger logger) {
          this.logger = logger;
      }
  
      @Override
      public void artifactInstalling(RepositoryEvent event) {
          logger.info("Installing {} to {}", event.getArtifact().getFile(), event.getFile());
      }
  
      @Override
      public void metadataInstalling(RepositoryEvent event) {
          logger.debug("Installing {} to {}", event.getMetadata(), 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();
  
          Object metadata;
          if (event.getMetadata().getFile() != null) {
              metadata = event.getMetadata().getFile();
          } else {
              metadata = event.getMetadata();
          }
  
          String errorType = " is invalid";
          if (exception instanceof FileNotFoundException) {
              errorType = " is inaccessible";
          }
  
          String msg = "";
          if (exception != null) {
              msg = ": " + exception.getMessage();
          }
  
          if (logger.isDebugEnabled()) {
              logger.warn("The metadata {} {}{}", metadata, errorType, msg, exception);
          } else {
              logger.warn("The metadata {} {}{}", metadata, errorType, msg);
          }
      }
  
      @Override
      public void artifactDescriptorInvalid(RepositoryEvent event) {
          // The exception stack trace is not really interesting here
          logger.warn(
                  "The POM for {} is invalid, transitive dependencies (if any) will not be available: {}",
                  event.getArtifact(),
                  event.getException().getMessage());
      }
  
      @Override
     public void artifactDescriptorMissing(RepositoryEvent event) {
         logger.warn("The POM for {} is missing, no dependency information available", event.getArtifact());
     }
 }