/*
 * Copyright 2012  Research Studios Austria Forschungsges.m.b.H.
 *
 *    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 won.bot.framework.component.needproducer.impl;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.mail.util.MimeMessageParser;
import org.apache.jena.rdf.model.Model;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import won.bot.framework.component.needproducer.FileBasedNeedProducer;
import won.protocol.model.NeedContentPropertyType;
import won.protocol.model.NeedGraphType;
import won.protocol.util.DefaultNeedModelWrapper;

import javax.mail.internet.MimeMessage;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

/**
 * User: fkleedorfer
 * Date: 17.12.13
 */
public class MailFileNeedProducer implements FileBasedNeedProducer
{
  private final Logger logger = LoggerFactory.getLogger(getClass());
  private NeedContentPropertyType needContentPropertyType = NeedContentPropertyType.IS_AND_SEEKS;

  public void setNeedContentPropertyType(NeedContentPropertyType needContentPropertyType) {
    this.needContentPropertyType = needContentPropertyType;
  }

  @Override
  public  synchronized Model readNeedFromFile(final File file) throws IOException
  {
    logger.debug("processing as mail file: {} ", file);
    FileInputStream fis = new FileInputStream(file);
    DefaultNeedModelWrapper needModelWrapper = new DefaultNeedModelWrapper("no:uri");
    try {
      MimeMessage emailMessage = new MimeMessage(null, fis);
      MimeMessageParser parser = new MimeMessageParser(emailMessage);
      parser.parse();
      needModelWrapper.setTitle(needContentPropertyType, parser.getSubject());
      String content = null;
      if (parser.hasPlainContent()){
        content = parser.getPlainContent();
      } else if (parser.hasHtmlContent()){
        Document doc = Jsoup.parse(parser.getHtmlContent());
        content = doc.text();
      }
      if (content != null) {
        needModelWrapper.setDescription(needContentPropertyType, content);
      }
      logger.debug("mail subject          : {}", parser.getSubject());
      logger.debug("mail has plain content: {}", parser.hasPlainContent());
      logger.debug("mail has html content : {}", parser.hasHtmlContent());
      logger.debug("mail has attachments  : {}", parser.hasAttachments());
      logger.debug("mail plain content    : {}", StringUtils.abbreviate(parser.getPlainContent(), 200));
      logger.debug("mail html content     : {}", StringUtils.abbreviate(parser.getHtmlContent(), 200));
      return needModelWrapper.getNeedModel(NeedGraphType.NEED);
    } catch (Exception e) {
      logger.debug("could not parse email from file {} ", file, e);
    } finally {
      if (fis != null) fis.close();
    }
    return null;
  }


}