package org.apache.maven.cli;
   
   /*
    * 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.
   */
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.Locale;
  import java.util.Properties;
  import java.util.TimeZone;
  
  import org.codehaus.plexus.util.IOUtil;
  import org.codehaus.plexus.util.Os;
  import org.slf4j.Logger;
  
  /**
   * Utility class used to report errors, statistics, application version info, etc.
   *
   * @author jdcasey
   *
   */
  public final class CLIReportingUtils
  {
  
      public static final long MB = 1024 * 1024;
  
      private static final long ONE_SECOND = 1000L;
      private static final long ONE_MINUTE = 60 * ONE_SECOND;
      private static final long ONE_HOUR = 60 * ONE_MINUTE;
      private static final long ONE_DAY = 24 * ONE_HOUR;
  
      public static final String BUILD_VERSION_PROPERTY = "version";
  
      public static String showVersion()
      {
          final String LS = System.getProperty( "line.separator" );
          Properties properties = getBuildProperties();
          StringBuilder version = new StringBuilder();
          version.append( createMavenVersionString( properties ) ).append( LS );
          version.append( reduce( properties.getProperty( "distributionShortName" ) + " home: "
                              + System.getProperty( "maven.home", "<unknown maven home>" ) ) ).append( LS );
          version.append( "Java version: " ).append(
              System.getProperty( "java.version", "<unknown java version>" ) ).append( ", vendor: " ).append(
              System.getProperty( "java.vendor", "<unknown vendor>" ) ).append( LS );
          version.append( "Java home: " ).append( System.getProperty( "java.home", "<unknown java home>" ) ).append( LS );
          version.append( "Default locale: " ).append( Locale.getDefault() ).append( ", platform encoding: " ).append(
              System.getProperty( "file.encoding", "<unknown encoding>" ) ).append( LS );
          version.append( "OS name: \"" ).append( Os.OS_NAME ).append( "\", version: \"" ).append( Os.OS_VERSION ).append(
              "\", arch: \"" ).append( Os.OS_ARCH ).append( "\", family: \"" ).append( Os.OS_FAMILY ).append( "\"" );
          return version.toString();
      }
  
      /**
       * Create a human readable string containing the Maven version, buildnumber, and time of build
       *
       * @param buildProperties The build properties
       * @return Readable build info
       */
      static String createMavenVersionString( Properties buildProperties )
      {
          String timestamp = reduce( buildProperties.getProperty( "timestamp" ) );
          String version = reduce( buildProperties.getProperty( BUILD_VERSION_PROPERTY ) );
          String rev = reduce( buildProperties.getProperty( "buildNumber" ) );
          String distributionName = reduce( buildProperties.getProperty( "distributionName" ) );
  
          String msg = distributionName + " ";
          msg += ( version != null ? version : "<version unknown>" );
          if ( rev != null || timestamp != null )
          {
              msg += " (";
              msg += ( rev != null ? rev : "" );
              if ( timestamp != null )
              {
                  String ts = formatTimestamp( Long.valueOf( timestamp ) );
                  msg += ( rev != null ? "; " : "" ) + ts;
              }
              msg += ")";
          }
          return msg;
      }
  
     private static String reduce( String s )
     {
         return ( s != null ? ( s.startsWith( "${" ) && s.endsWith( "}" ) ? null : s ) : null );
     }
 
     static Properties getBuildProperties()
     {
         Properties properties = new Properties();
         InputStream resourceAsStream = null;
         try
         {
             resourceAsStream = MavenCli.class.getResourceAsStream( "/org/apache/maven/messages/build.properties" );
 
             if ( resourceAsStream != null )
             {
                 properties.load( resourceAsStream );
             }
         }
         catch ( IOException e )
         {
             System.err.println( "Unable determine version from JAR file: " + e.getMessage() );
         }
         finally
         {
             IOUtil.close( resourceAsStream );
         }
 
         return properties;
     }
 
     public static void showError( Logger logger, String message, Throwable e, boolean showStackTrace )
     {
         if ( showStackTrace )
         {
             logger.error( message, e );
         }
         else
         {
             logger.error( message );
 
             if ( e != null )
             {
                 logger.error( e.getMessage() );
 
                 for ( Throwable cause = e.getCause(); cause != null; cause = cause.getCause() )
                 {
                     logger.error( "Caused by: " + cause.getMessage() );
                 }
             }
         }
     }
 
     public static String formatTimestamp( long timestamp )
     {
         // Manual construction of the tz offset because only Java 7 understands 'ZZ' replacement
         TimeZone tz = TimeZone.getDefault();
         int offset = tz.getRawOffset();
 
         long m = Math.abs( ( offset / ONE_MINUTE ) % 60 );
         long h = Math.abs( ( offset / ONE_HOUR ) % 24 );
 
         int offsetDir = (int) Math.signum( (float) offset );
         char offsetSign = offsetDir >= 0 ? '+' : '-';
         return String.format( "%tFT%<tT%s%02d:%02d", timestamp, offsetSign, h, m );
     }
 
     public static String formatDuration( long duration )
     {
         long ms = duration % 1000;
         long s = ( duration / ONE_SECOND ) % 60;
         long m = ( duration / ONE_MINUTE ) % 60;
         long h = ( duration / ONE_HOUR ) % 24;
         long d = duration / ONE_DAY;
 
         String format;
         if ( d > 0 )
         {
             format = "%d d %02d:%02d h";
         }
         else if ( h > 0 )
         {
             format = "%2$02d:%3$02d h";
         }
         else if ( m > 0 )
         {
             format = "%3$02d:%4$02d min";
         }
         else
         {
             format = "%4$d.%5$03d s";
         }
 
         return String.format( format, d, h, m, s, ms );
     }
 
 }