/*
    * Copyright 2012-2021 CodeLibs Project and the Others.
    *
    * Licensed 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.codelibs.fess.app.service;
  
  import java.util.Collections;
  import java.util.List;
  
  import javax.annotation.Resource;
  
  import org.codelibs.core.beans.util.BeanUtil;
  import org.codelibs.fess.Constants;
  import org.codelibs.fess.app.pager.StopwordsPager;
  import org.codelibs.fess.dict.DictionaryFile.PagingList;
  import org.codelibs.fess.dict.DictionaryManager;
  import org.codelibs.fess.dict.stopwords.StopwordsFile;
  import org.codelibs.fess.dict.stopwords.StopwordsItem;
  import org.codelibs.fess.mylasta.direction.FessConfig;
  import org.dbflute.optional.OptionalEntity;
  
  public class StopwordsService {
      @Resource
      protected DictionaryManager dictionaryManager;
  
      @Resource
      protected FessConfig fessConfig;
  
      public List<StopwordsItem> getStopwordsList(final String dictId, final StopwordsPager stopwordsPager) {
          return getStopwordsFile(dictId).map(file -> {
              final int pageSize = stopwordsPager.getPageSize();
              final PagingList<StopwordsItem> stopwordsList =
                      file.selectList((stopwordsPager.getCurrentPageNumber() - 1) * pageSize, pageSize);
  
              // update pager
              BeanUtil.copyBeanToBean(stopwordsList, stopwordsPager, option -> option.include(Constants.PAGER_CONVERSION_RULE));
              stopwordsList.setPageRangeSize(fessConfig.getPagingPageRangeSizeAsInteger());
              stopwordsPager.setPageNumberList(stopwordsList.createPageNumberList());
  
              return (List<StopwordsItem>) stopwordsList;
          }).orElse(Collections.emptyList());
      }
  
      public OptionalEntity<StopwordsFile> getStopwordsFile(final String dictId) {
          return dictionaryManager.getDictionaryFile(dictId).filter(file -> file instanceof StopwordsFile)
                  .map(file -> OptionalEntity.of((StopwordsFile) file)).orElse(OptionalEntity.empty());
      }
  
      public OptionalEntity<StopwordsItem> getStopwordsItem(final String dictId, final long id) {
          return getStopwordsFile(dictId).map(file -> file.get(id).get());
      }
  
      public void store(final String dictId, final StopwordsItem stopwordsItem) {
          getStopwordsFile(dictId).ifPresent(file -> {
              if (stopwordsItem.getId() == 0) {
                  file.insert(stopwordsItem);
              } else {
                  file.update(stopwordsItem);
              }
          });
      }
  
      public void delete(final String dictId, final StopwordsItem stopwordsItem) {
          getStopwordsFile(dictId).ifPresent(file -> {
              file.delete(stopwordsItem);
          });
      }
  }