/*
    * Copyright (c) 2002-2014, Mairie de Paris
    * All rights reserved.
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    *
    *  1. Redistributions of source code must retain the above copyright notice
   *     and the following disclaimer.
   *
   *  2. Redistributions in binary form must reproduce the above copyright notice
   *     and the following disclaimer in the documentation and/or other materials
   *     provided with the distribution.
   *
   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
   *     contributors may be used to endorse or promote products derived from
   *     this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   * License 1.0
   */
  package fr.paris.lutece.portal.web.system;
  
  import fr.paris.lutece.portal.service.admin.AdminUserService;
  import fr.paris.lutece.portal.service.datastore.DatastoreService;
  import fr.paris.lutece.portal.service.datastore.LocalizedData;
  import fr.paris.lutece.portal.service.datastore.LocalizedDataGroup;
  import fr.paris.lutece.portal.service.i18n.I18nService;
  import fr.paris.lutece.portal.service.site.properties.SitePropertiesService;
  import fr.paris.lutece.portal.service.template.AppTemplateService;
  import fr.paris.lutece.portal.service.util.AppLogService;
  import fr.paris.lutece.portal.service.util.AppPathService;
  import fr.paris.lutece.portal.service.util.AppPropertiesService;
  import fr.paris.lutece.portal.web.admin.AdminFeaturesPageJspBean;
  import fr.paris.lutece.util.html.HtmlTemplate;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.io.Serializable;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Date;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.StringTokenizer;
  
  import javax.servlet.ServletContext;
  import javax.servlet.http.HttpServletRequest;
  
  
  /**
   * This class provides the user interface to manage system features ( manage
   * logs, view system files, ... ).
   */
  public class SystemJspBean extends AdminFeaturesPageJspBean
  {
      // Right
      public static final String RIGHT_PROPERTIES_MANAGEMENT = "CORE_PROPERTIES_MANAGEMENT";
      public static final String RIGHT_LOGS_VISUALISATION = "CORE_LOGS_VISUALISATION";
  
      // Jsp definition
      public static final String JSP_MANAGE_PROPERTIES = "ManageProperties.jsp";
  
      /** serial id */
      private static final long serialVersionUID = 3770485521087669430L;
  
      // Markers
      private static final String MARK_FILES_LIST = "files_list";
      private static final String MARK_FILES_SYSTEM_DIRECTORY = "files_system_directory";
      private static final String MARK_FILES_SYSTEM_NAME = "file_system_name";
      private static final String MARK_FILE_SYSTEM_DATA = "file_system_data";
  
      //    private static final String MARK_WEBMASTER_PROPERTIES = "webmaster_properties";
      private static final String MARK_PROPERTIES_GROUPS_LIST = "groups_list";
  
      // Template Files path
      private static final String TEMPLATE_MANAGE_FILES_SYSTEM = "admin/system/manage_files_system.html";
      private static final String TEMPLATE_VIEW_FILES_SYSTEM = "admin/system/view_files_system.html";
      private static final String TEMPLATE_VIEW_FILE = "admin/system/view_file.html";
  
      //    private static final String TEMPLATE_MANAGE_PROPERTIES = "admin/system/manage_properties.html";
      private static final String TEMPLATE_MODIFY_PROPERTIES = "admin/system/modify_properties.html";
  
     // Parameters
     private static final String PARAMETER_FILE = "file";
     private static final String PARAMETER_DIRECTORY = "directory";
     private static final String PARAMETER_DIR = "dir";
 
     // Properties file definition
     private static final String PROPERTY_FILES_SYSTEM_LIST = "system.list";
     private static final String PROPERTY_TITLE_MANAGE_FILES_SYSTEM = "portal.system.manage_files_system.pageTitle";
     private static final String PROPERTY_FILE_DESCRIPTION = "portal.system.manage_files_system.description.";
     private static final String PROPERTY_FILE_NAME = "portal.system.manage_files_system.name.";
     private static final String PROPERTY_TITLE_VIEW_FILES_SYSTEM = "portal.system.view_files_system.pageTitle";
     private static final String PROPERTY_TITLE_VIEW_FILE = "portal.system.view_file.pageTitle";
     private static final String MARK_WEBAPP_URL = "webapp_url";
     private static final String MARK_LOCALE = "locale";
 
     /**
      * Returns ViewLogs page
      *
      * @param request The HTTP request.
      * @return The HTML code
      */
     public String getManageFilesSystem( HttpServletRequest request )
     {
         setPageTitleProperty( PROPERTY_TITLE_MANAGE_FILES_SYSTEM );
 
         StringTokenizer st = new StringTokenizer( AppPropertiesService.getProperty( PROPERTY_FILES_SYSTEM_LIST ), "," );
         ArrayList<SystemFile> list = new ArrayList<SystemFile>(  );
 
         while ( st.hasMoreElements(  ) )
         {
             String strFileSystemName = st.nextToken(  ).trim(  );
             SystemFile file = new SystemFile(  );
             file.setName( I18nService.getLocalizedString( PROPERTY_FILE_NAME + strFileSystemName, request.getLocale(  ) ) );
             file.setDescription( I18nService.getLocalizedString( PROPERTY_FILE_DESCRIPTION + strFileSystemName,
                     request.getLocale(  ) ) );
             file.setDirectory( AppPropertiesService.getProperty( "system." + strFileSystemName + ".directory" ) );
             list.add( file );
         }
 
         HashMap<String, Collection<SystemFile>> model = new HashMap<String, Collection<SystemFile>>(  );
         model.put( MARK_FILES_LIST, list );
 
         HtmlTemplate template = AppTemplateService.getTemplate( TEMPLATE_MANAGE_FILES_SYSTEM, getLocale(  ), model );
 
         return getAdminPage( template.getHtml(  ) );
     }
 
     /**
      * Get directory list
      *
      * @param request The request
      * @return The html code
      */
     public String getManageFilesSystemDir( HttpServletRequest request )
     {
         setPageTitleProperty( PROPERTY_TITLE_VIEW_FILES_SYSTEM );
 
         String strDir = request.getParameter( PARAMETER_DIR );
 
         // Check if dir is valid
         StringTokenizer st = new StringTokenizer( AppPropertiesService.getProperty( PROPERTY_FILES_SYSTEM_LIST ), "," );
 
         boolean bDirIsValid = false;
 
         while ( st.hasMoreElements(  ) )
         {
             // The dir param is valid, if and only if it's equal to a property value
             String strFileSystemName = st.nextToken(  ).trim(  );
             String strDirectory = AppPropertiesService.getProperty( "system." + strFileSystemName + ".directory" );
 
             if ( strDirectory.equals( strDir ) )
             {
                 bDirIsValid = true;
 
                 break;
             }
         }
 
         if ( !bDirIsValid )
         {
             return getManageFilesSystem( request );
         }
 
         String strDirectory = AppPathService.getWebAppPath(  ) + strDir;
         File directoryLog = new File( strDirectory );
         File[] fileLog = directoryLog.listFiles(  );
 
         // Creating names array
         int nLogNumber = fileLog.length;
         String[] arrayLog = new String[nLogNumber];
         ArrayList<SystemFile> list = new ArrayList<SystemFile>(  );
 
         for ( int i = 0; i < nLogNumber; i++ )
         {
             arrayLog[i] = fileLog[i].getName(  );
         }
 
         //defines the order of the logs
         File[] screenArrayLog = new File[nLogNumber];
         String name;
 
         for ( int i = 0; i < nLogNumber; i++ )
         {
             int numero = i;
             name = arrayLog[i];
 
             for ( int a = 0; a < nLogNumber; a++ )
             {
                 String strNameTemp = arrayLog[a];
 
                 if ( name.toLowerCase(  ).trim(  ).compareTo( strNameTemp.toLowerCase(  ).trim(  ) ) > 0 )
                 {
                     name = strNameTemp;
                     numero = a;
                 }
             }
 
             screenArrayLog[i] = fileLog[numero];
             arrayLog[numero] = "{";
         }
 
         for ( int i = 0; i < nLogNumber; i++ )
         {
             File file = screenArrayLog[i];
             SystemFile f = new SystemFile(  );
             f.setName( file.getName(  ) );
             f.setDirectory( strDir );
             f.setSize( (int) ( file.length(  ) / 1000 ) + 1 );
             f.setDate( new Date( file.lastModified(  ) ) );
             list.add( f );
         }
 
         Map<String, Serializable> model = new HashMap<String, Serializable>(  );
         model.put( MARK_FILES_LIST, list );
         model.put( MARK_FILES_SYSTEM_DIRECTORY, strDir );
 
         HtmlTemplate template = AppTemplateService.getTemplate( TEMPLATE_VIEW_FILES_SYSTEM, getLocale(  ), model );
 
         return getAdminPage( template.getHtml(  ) );
     }
 
     ////////////////////////////////////////////////////////////////////////////
     // Methods to display a system file
     /**
      * Returns a FileView page
      *
      * @param request The HTTP request.
      * @return The HTML code
      */
     public String getFileView( HttpServletRequest request )
     {
         HashMap<String, Object> model = new HashMap<String, Object>(  );
         setPageTitleProperty( PROPERTY_TITLE_VIEW_FILE );
 
         String strFilePath;
         String strFileData;
         String strFile = request.getParameter( PARAMETER_FILE );
         String strDirectory = request.getParameter( PARAMETER_DIRECTORY );
 
         if ( strFile == null )
         {
             strFilePath = "ERROR";
             strFileData = "No file selected !";
         }
         else
         {
             strFilePath = AppPathService.getWebAppPath(  );
 
             if ( strFilePath == null )
             {
                 strFilePath = "ERROR";
                 strFileData = strFile + " not found !";
             }
             else
             {
                 strFileData = getFileData( strFilePath + strDirectory + strFile );
             }
         }
 
         model.put( MARK_FILES_SYSTEM_NAME, strFilePath + strDirectory + strFile );
         model.put( MARK_FILE_SYSTEM_DATA, strFileData );
         model.put( MARK_FILES_SYSTEM_DIRECTORY, strDirectory );
 
         HtmlTemplate template = AppTemplateService.getTemplate( TEMPLATE_VIEW_FILE, getLocale(  ), model );
 
         return getAdminPage( template.getHtml(  ) );
     }
 
     /**
      * Returns the form to update info about the webmaster.properties
      *
      * @param request The Http request
      * @return The HTML form to update info
      */
     public String getManageProperties( HttpServletRequest request )
     {
         HashMap<String, Object> model = new HashMap<String, Object>(  );
         // Insert the rows in the list
         model.put( MARK_PROPERTIES_GROUPS_LIST, SitePropertiesService.getGroups( getLocale(  ) ) );
         model.put( MARK_WEBAPP_URL, AppPathService.getBaseUrl( request ) );
         model.put( MARK_LOCALE, getLocale(  ).getLanguage(  ) );
 
         HtmlTemplate templateList = AppTemplateService.getTemplate( TEMPLATE_MODIFY_PROPERTIES, getLocale(  ), model );
 
         return getAdminPage( templateList.getHtml(  ) );
     }
 
     /**
      * Process the change form of the webmaster.properties
      *
      * @param request The Http request
      * @param context The context
      * @return The Jsp URL of the process result
      */
     public static String doModifyProperties( HttpServletRequest request, ServletContext context )
     {
         List<LocalizedDataGroup> groups = SitePropertiesService.getGroups( AdminUserService.getAdminUser( request )
                                                                                            .getLocale(  ) );
 
         for ( LocalizedDataGroup group : groups )
         {
             List<LocalizedData> datas = group.getLocalizedDataList(  );
 
             for ( LocalizedData data : datas )
             {
                 String strValue = request.getParameter( data.getKey(  ) );
 
                 if ( ( strValue != null ) && !data.getValue(  ).equals( strValue ) )
                 {
                     DatastoreService.setDataValue( data.getKey(  ), strValue );
                 }
             }
         }
 
         // if the operation occurred well, redirects towards the view of the Properties
         return JSP_MANAGE_PROPERTIES;
     }
 
     ///////////////////////////////////////////////////////////////////////////////
     // Private Implementation
     /**
      * Returns the content of a file.
      *
      * @param strFilePath The file Path
      * @return The content of the file.
      */
     private static String getFileData( String strFilePath )
     {
         StringBuilder sbData = new StringBuilder(  );
 
         FileInputStream is = null;
 
         try
         {
             is = new FileInputStream( strFilePath );
 
             int chr = 0;
 
             while ( chr != -1 )
             {
                 chr = is.read(  );
                 sbData.append( (char) chr );
             }
 
             //we delete the end of file character
             sbData.setLength( sbData.length(  ) - 1 );
         }
         catch ( FileNotFoundException e )
         {
             sbData.append( "File " ).append( strFilePath ).append( " not found" );
         }
         catch ( IOException e )
         {
             sbData.append( "Error reading the file : " );
             sbData.append( strFilePath );
         }
         finally
         {
             if ( is != null )
             {
                 try
                 {
                     is.close(  );
                 }
                 catch ( IOException e )
                 {
                     AppLogService.error( e.getMessage(  ), e );
                 }
             }
         }
 
         return sbData.toString(  );
     }
 }