package org.apache.archiva.rest.services;
   /*
    * 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 org.apache.archiva.redback.components.scheduler.CronExpressionValidator;
  import org.apache.archiva.redback.rest.api.services.RedbackServiceException;
  import org.apache.archiva.redback.rest.api.services.UtilServices;
  import org.apache.archiva.rest.api.services.ArchivaRestServiceException;
  import org.apache.archiva.rest.api.services.CommonServices;
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.stereotype.Service;
  
  import javax.annotation.PostConstruct;
  import javax.inject.Inject;
  import javax.ws.rs.core.Response;
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.Map;
  import java.util.Properties;
  import java.util.concurrent.ConcurrentHashMap;
  
  /**
   * @author Olivier Lamy
   */
  @Service("commonServices#rest")
  public class DefaultCommonServices
      implements CommonServices
  {
  
      private static final String RESOURCE_NAME = "org/apache/archiva/i18n/default";
  
      private Logger log = LoggerFactory.getLogger( getClass() );
  
      @Inject
      private UtilServices utilServices;
  
      private Map<String, String> cachei18n = new ConcurrentHashMap<String, String>();
  
      @Inject
      protected CronExpressionValidator cronExpressionValidator;
  
      @PostConstruct
      public void init()
          throws ArchivaRestServiceException
      {
  
          // preload i18n en and fr
          getAllI18nResources( "en" );
          getAllI18nResources( "fr" );
      }
  
      @Override
      public String getI18nResources( String locale )
          throws ArchivaRestServiceException
      {
          Properties properties = new Properties();
  
          StringBuilder resourceName = new StringBuilder( RESOURCE_NAME );
          try
          {
  
              loadResource( properties, resourceName, locale );
  
          }
          catch ( IOException e )
          {
              log.warn( "skip error loading properties {}", resourceName.toString() );
          }
  
          return fromProperties( properties );
      }
  
      private void loadResource( Properties properties, StringBuilder resourceName, String locale )
          throws IOException
      {
          // load default
          loadResource( properties, new StringBuilder( resourceName ).append( ".properties" ).toString(), locale );
          // if locale override with locale content
          if ( StringUtils.isNotEmpty( locale ) )
          {
             loadResource( properties,
                           new StringBuilder( resourceName ).append( "_" + locale ).append( ".properties" ).toString(),
                           locale );
         }
 
     }
 
     private String fromProperties( final Properties properties )
     {
         StringBuilder output = new StringBuilder();
 
         for ( Map.Entry<Object, Object> entry : properties.entrySet() )
         {
             output.append( (String) entry.getKey() ).append( '=' ).append( (String) entry.getValue() );
             output.append( '\n' );
         }
 
         return output.toString();
     }
 
     private void loadResource( final Properties finalProperties, String resourceName, String locale )
         throws IOException
     {
         Properties properties = new Properties();
         try (InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream( resourceName ))
         {
             if ( is != null )
             {
                 properties.load( is );
                 finalProperties.putAll( properties );
             }
             else
             {
                 if ( !StringUtils.equalsIgnoreCase( locale, "en" ) )
                 {
                     log.info( "cannot load resource {}", resourceName );
                 }
             }
         }
     }
 
     @Override
     public String getAllI18nResources( String locale )
         throws ArchivaRestServiceException
     {
 
         String cachedi18n = cachei18n.get( StringUtils.isEmpty( locale ) ? "en" : StringUtils.lowerCase( locale ) );
         if ( cachedi18n != null )
         {
             return cachedi18n;
         }
 
         try
         {
 
             Properties all = utilServices.getI18nProperties( locale );
             StringBuilder resourceName = new StringBuilder( RESOURCE_NAME );
             loadResource( all, resourceName, locale );
 
             String i18n = fromProperties( all );
             cachei18n.put( StringUtils.isEmpty( locale ) ? "en" : StringUtils.lowerCase( locale ), i18n );
             return i18n;
         }
         catch ( IOException e )
         {
             throw new ArchivaRestServiceException( e.getMessage(),
                                                    Response.Status.INTERNAL_SERVER_ERROR.getStatusCode(), e );
         }
         catch ( RedbackServiceException e )
         {
             throw new ArchivaRestServiceException( e.getMessage(), e.getHttpErrorCode(), e );
         }
     }
 
     private void loadFromString( String propsStr, Properties properties )
         throws ArchivaRestServiceException
     {
         try (InputStream inputStream = new ByteArrayInputStream( propsStr.getBytes() ))
         {
             properties.load( inputStream );
         }
         catch ( IOException e )
         {
             throw new ArchivaRestServiceException( e.getMessage(),
                                                    Response.Status.INTERNAL_SERVER_ERROR.getStatusCode(), e );
         }
     }
 
 
     @Override
     public Boolean validateCronExpression( String cronExpression )
         throws ArchivaRestServiceException
     {
         return cronExpressionValidator.validate( cronExpression );
     }
 }