/*
 * Copyright (C) 2000 - 2024 Silverpeas
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * As a special exception to the terms and conditions of version 3.0 of
 * the GPL, you may redistribute this Program in connection with Free/Libre
 * Open Source Software ("FLOSS") applications as described in Silverpeas's
 * FLOSS exception. You should have received a copy of the text describing
 * the FLOSS exception, and it is also available here:
 * "https://www.silverpeas.org/legal/floss_exception.html"
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */
package org.silverpeas.components.quizz;

import org.silverpeas.core.questioncontainer.answer.model.Answer;
import org.silverpeas.core.util.file.FileItem;
import org.silverpeas.core.util.file.FileUploadUtil;
import org.silverpeas.core.util.file.FileRepositoryManager;
import org.silverpeas.kernel.util.StringUtil;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * @author ehugonnet
 */
public class QuestionHelper {

  private QuestionHelper() {
  }

  public static boolean isCorrectFile(FileItem filePart) {
    String fileName = FileUploadUtil.getFileName(filePart);
    boolean correctFile = false;
    if (fileName != null) {
      String logicalName = fileName.trim();
      if ((logicalName.length() >= 3) && (logicalName.indexOf('.') != -1)) {
        String type = logicalName.substring(logicalName.indexOf('.') + 1);
        if (type.length() >= 3) {
          correctFile = true;
        }
      }
    }
    return correctFile;
  }

  public static List<Answer> extractAnswer(List<FileItem> items, QuestionForm form,
      String componentId, String subdir) throws IOException {
    List<Answer> answers = new ArrayList<>();
    for (final FileItem item : items) {
      String mpName = item.getFieldName();
      if (item.isFormField() && mpName.startsWith("answer")) {
        String answerInput = FileUploadUtil.getOldParameter(items, mpName, "");
        Answer answer = new Answer(null, null, answerInput, 0, false, null, 0, false, null, null);
        String id = mpName.substring("answer".length());
        String nbPoints = FileUploadUtil.getOldParameter(items, "nbPoints" + id, "0");
        answer.setNbPoints(Integer.parseInt(nbPoints));
        if (Integer.parseInt(nbPoints) > 0) {
          answer.setIsSolution(true);
        }
        String comment = FileUploadUtil.getOldParameter(items, "comment" + id, "");
        answer.setComment(comment);
        String value = FileUploadUtil.getOldParameter(items, "valueImageGallery" + id, "");
        if (StringUtil.isDefined(value) && !form.isFile()) {
            answer.setImage(value);
          }

        FileItem image = FileUploadUtil.getFile(items, "image" + id);
        if (image != null) {
          addImageToAnswer(answer, image, form, componentId, subdir);
        }
        answers.add(answer);
      }
    }
    return answers;
  }

  protected static void addImageToAnswer(Answer answer, FileItem item, QuestionForm form,
      String componentId, String subdir) throws IOException {
    // it's a file part
    if (QuestionHelper.isCorrectFile(item)) {
      // the part actually contained a file
      String logicalName = FileUploadUtil.getFileName(item);
      String type = logicalName.substring(logicalName.indexOf('.') + 1);
      String physicalName =
          Long.toString(new Date().getTime()) + form.getAttachmentSuffix() + "." + type;
      form.setAttachmentSuffix(form.getAttachmentSuffix() + 1);
      File dir =
          new File(FileRepositoryManager.getAbsolutePath(componentId) + subdir + File.separator +
              physicalName);
      long size = item.getSize();
      FileUploadUtil.saveToFile(dir, item);
      if (size > 0) {
        answer.setImage(physicalName);
        form.setFile(true);
      }
    }
  }
}
