/*
  fm - File management class library
  Copyright (C) 2024  Ulrich Hilger

  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.

  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 de.uhilger.fm;

import java.io.File;
import java.io.IOException;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;

/**
 * Eine Klasse mit Methoden zum Kopieren und Verschieben von Dateien
 *
 * @author Ulrich Hilger, 15. Janaur 2024
 */
public class Mover extends FileHelper {


  public String copyOrMoveFiles(String fromPath, String toPath, String[] fileNames, 
          int operation, String base) throws IOException {
    String result = null;
    File srcDir = new File(base, fromPath);
    File targetDir = new File(base, toPath);
    for (String fileName : fileNames) {
      File srcFile = new File(srcDir, fileName);
      //logger.fine("srcFile: " + srcFile);
      if (srcFile.isDirectory()) {
        //logger.fine("srcFile is directory.");
        CopyMoveVisitor bearbeiter = new CopyMoveVisitor();
        bearbeiter.setTargetDir(targetDir.toPath());
        bearbeiter.setOperation(operation);
        Files.walkFileTree(srcFile.toPath(), bearbeiter);
      } else {
        Path source = srcFile.toPath();
        File destFile = targetDir.toPath().resolve(source.getFileName()).toFile();
        if (destFile.exists()) {
          destFile = getNewFileName(destFile);
        }
        if (operation == Const.OP_MOVE) {
          String fname = srcFile.getName().toLowerCase();
          if (fname.endsWith(Const.JPEG)
                  || fname.endsWith(Const.JPG)
                  || fname.endsWith(Const.PNG)) {
            moveImgFilesToDirectory(srcFile, srcDir, targetDir, false);
          } else {
            Files.move(source, destFile.toPath());
          }
        } else {
          Files.copy(source, destFile.toPath());
        }
      }
    }
    return result;
  }

  private void moveImgFilesToDirectory(File srcFile, File srcDir, File targetDir, 
          boolean createDestDir) throws IOException {
    String fnameext = srcFile.getName();
    int dotpos = fnameext.lastIndexOf(".");
    String fname = fnameext.substring(0, dotpos);
    String ext = fnameext.substring(dotpos);
    //logger.fine("fname: " + fname + ", ext: " + ext);
    Path targetPath = targetDir.toPath();
    DirectoryStream<Path> stream = Files.newDirectoryStream(srcDir.toPath(), fname + "*" + ext); 
                                                //"*.{txt,doc,pdf,ppt}"
    for (Path path : stream) {
      //logger.fine(path.getFileName().toString());
      //Files.delete(path);
      Files.move(path, targetPath.resolve(path.getFileName()));
    }
    stream.close();
  }

}