/*
  neon-fm - File management extensions to Neon
  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 com.google.gson.Gson;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;


/**
 * Eine Klasse zur Bildung einer Liste mit den Dateien eines Verzeichnisses.
 * 
 * Varianten von Bilddateien werden ausgeblendet. Enthaelt ein Ordner die Dateien 
 * mein-bild.jpg
 * mein-bild_tn.jpg
 * mein-bild_kl.jpg
 * erscheint nur die Datei mein-bild.jpg in der Liste.
 * 
 * 
 * @author Ulrich Hilger
 * @version 0.1, 05.11.2024
 */
public class Lister {

  public static final String STR_DOT = ".";

  public String liste(String fName, String ctxPath, String base/*, String path*/) throws IOException {
    File[] files = new File(base, fName).listFiles(new ImageFileFilter());
    if (files != null && files.length > 0) {
      Arrays.sort(files);
      ArrayList liste = new ArrayList();
      for (File file : files) {
        Datei datei = new Datei();
        String dateiName = file.getName();
        datei.setName(dateiName);
        if (file.isDirectory()) {
          datei.setTyp(Datei.TYP_ORDNER);
        } else {
          datei.setTyp(Datei.TYP_DATEI);
        }
        String lowerName = dateiName.toLowerCase();
        if (lowerName.endsWith(Const.JPEG)
                || lowerName.endsWith(Const.JPG)
                || lowerName.endsWith(Const.PNG)) {
          datei.setBild(true);
          String ext = dateiName.substring(dateiName.lastIndexOf(STR_DOT));
          String ohneExt = dateiName.substring(0, dateiName.lastIndexOf(STR_DOT));
          datei.setMiniurl(ctxPath + /*"/" + */ fName + ohneExt + Const.TN + ext);
          //buildImgSrc(file, datei, ohneExt, ext);
        }
        liste.add(datei);
      }
      //while(threadCount > 0) {
      //  try {
      //    Thread.sleep(50);
      //  } catch (InterruptedException ex) {
      //    Logger.getLogger(FileManager.class.getName()).log(Level.SEVERE, null, ex);
      //  }
      //}
      if (!liste.isEmpty()) {
        DirList list = new DirList();
        list.setPfad(ctxPath + fName);
        list.setDateien(liste);
        Gson gson = new Gson();
        String json = gson.toJson(list);
        return json;
      } else {
        return null;
      }
    } else {
      return null;
    }
    //} else {
    //}
  }

}