/*
    * Copyright (c) 2002-2024, City of 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.plugins.genericattributes.service.file;
  
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.function.Function;
  
  import org.apache.commons.fileupload.FileItem;
  import org.apache.commons.lang3.StringUtils;
  
  import fr.paris.lutece.portal.business.file.File;
  import fr.paris.lutece.portal.service.file.FileService;
  import fr.paris.lutece.portal.service.file.FileServiceException;
  import fr.paris.lutece.portal.service.file.IFileStoreServiceProvider;
  import fr.paris.lutece.portal.service.util.AppLogService;
  import fr.paris.lutece.portal.service.util.AppPropertiesService;
  
  public class GenericAttributeFileService
  {
  	private static final String PROPERTY_FILESTORESERVICE_PREFIX = "genericattributes.filestoreservice";
  	private static final String PROPERTY_FILESTORESERVICE_DEFAULT_SUFFIX = "default";
  
      private static final GenericAttributeFileServiceervice/file/GenericAttributeFileService.html#GenericAttributeFileService">GenericAttributeFileService _instance = new GenericAttributeFileService( );
      private static final Map<String,String> _entryTypeFileServices = new HashMap<>();
  	
      /**
       * Constructor
       */
      private GenericAttributeFileService( )
      {
      	List<String> keyList = AppPropertiesService.getKeys( PROPERTY_FILESTORESERVICE_PREFIX);
      	
      	// init specific entryType fileStoreService names if exists
      	keyList.stream().forEach( s -> { 
      		if ( !StringUtils.isAllBlank(  AppPropertiesService.getProperty(s) ) )
      		{
      			_entryTypeFileServices.put(s, AppPropertiesService.getProperty(s)); 
      		}
      	} );
      }
      
      /**
       * get FileStoreServiceProvider name for entry type :
       * - returns the entry type FileService (if set)
       * - otherwise, returns the GenAttr default FileService (if set)
       * - otherwise, returns the lutece default FileService 
       * 
       * @param strEntryType
       * @return the name of the FileStoreServiceProvider
       */
      public String getFileStoreProviderName( String strEntryType )
      {
      	if (strEntryType != null ) 
      	{
      		if ( _entryTypeFileServices.containsKey( strEntryType ))
      		{
      			return _entryTypeFileServices.get( strEntryType );
      		}
      	}
      	
      	if ( _entryTypeFileServices.containsKey( PROPERTY_FILESTORESERVICE_DEFAULT_SUFFIX ))
  		{
  			return _entryTypeFileServices.get( PROPERTY_FILESTORESERVICE_DEFAULT_SUFFIX );
  		}
      	
      	return FileService.getInstance( ).getFileStoreServiceProvider( ).getName( );
     }
     
     /**
      * get FileStoreServiceProvider name  :
      * - returns the GenAttr default FileService (if set)
      * - otherwise, returns the lutece default FileService 
      * 
      * Use getFileStoreProviderName( String strEntryType ) to get entryType specific File service
      * 
      * @return the name of the FileStoreServiceProvider
      */
     public String getFileStoreProviderName(  )
     {
     	return getFileStoreProviderName( null );
     }
 
     /**
      * get instance of service
      * 
      * @return the instance
      */
     public static GenericAttributeFileService getInstance( )
     {
         return _instance;
     }
 
     /**
      * Save a file
      * 
      * @param file The lutece file in default generic file Service
      * @return The key of the file
      */
     public String save( File file)
     {
     	return save( file, null);
     }
     /**
      * Save a file
      * 
      * @param file The lutece file
      * @param strEntryType the entry type
      * @return The key of the file
      */
     public String save( File file, String strEntryType)
     {
         try
         {
         	if ( file.getOrigin( ) == null )
         	{
         		file.setOrigin( getFileStoreProviderName( strEntryType ) );
         	}
         	
         	return FileService.getInstance( ).getFileStoreServiceProvider( file.getOrigin( ) ).storeFile( file );
         }
         catch( FileServiceException e )
         {
             AppLogService.error( e );
             return null;
         }
     }
 
     /**
      * Save a file
      * 
      * @param file The fileItem
      * @param strEntryType the entry type
      * @return The key of the file
      */
     public String save( FileItem file, String strEntryType)
     {
         try
         {        	
         	return FileService.getInstance( ).getFileStoreServiceProvider( getFileStoreProviderName( strEntryType )  ).storeFileItem( file );
         }
         catch( FileServiceException e )
         {
             AppLogService.error( e );
             return null;
         }
     }
     
     /**
      * Load a file
      * 
      * @param strKey
      *            The key of the file
      * @return The file
      */
     public File load( String strKey, String strOrigin )
     {
         try
         {
         	if ( StringUtils.isEmpty( strOrigin ) )
         	{
         		strOrigin =  getFileStoreProviderName( ) ;
         	}
         	
             return FileService.getInstance( ).getFileStoreServiceProvider( strOrigin ).getFile( strKey );
         }
         catch( FileServiceException e )
         {
             AppLogService.error( e );
             return null;
         }
     }
 
     /**
      * Delete a file
      * 
      * @param strKey
      *            The key of the file
      */
     public void delete( String strKey, String strOrigin )
     {
         try
         {
         	if ( StringUtils.isEmpty( strOrigin ) )
         	{
         		strOrigin =  getFileStoreProviderName( );
         	}
         	
             FileService.getInstance( ).getFileStoreServiceProvider( strOrigin ).delete( strKey );
         }
         catch( FileServiceException e )
         {
             AppLogService.error( e );
         }
     }
 
 }