/*
  neon-fm - Dateiverwaltung fuer 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.neon.fm;

import com.sun.net.httpserver.HttpExchange;
import de.uhilger.neon.FileServer;
import de.uhilger.neon.HttpResponder;
import de.uhilger.fm.Duplicator;
import de.uhilger.fm.Mover;
import de.uhilger.fm.Renamer;
import de.uhilger.fm.Inflator;
import de.uhilger.fm.Deflator;
import java.io.IOException;

/**
 * Ein Neon-Actor fuer Aenderungen an Dateien.
 *
 * Die folgenden Aktionen werden ausgefuehrt.
 *
 * PUT [url] [body]
 *
 * <pre>
 * - Inhalt einer einzelnen Datei anlegen oder ueberschreiben: url=ziel, Dateiinhalt im Body
 * - Liste mit Dateien kopieren (?copyFrom=quelle): url=ziel, Dateiliste im Body
 * - Liste mit Dateien verschieben (?moveFrom=quelle): url=Ziel, Dateiliste im Body
 * - einzelne Datei duplizieren (?duplicate): url=Zieldatei
 * - einzelne Datei umbenennen (?renameTo=neuer Name): url=Datei oder -odner
 * - Ordner packen (?zip): url=Ordner
 * - Zip-Datei entpacken (?unzip): url=Datei
 * </pre>
 *
 * @author Ulrich Hilger
 * @version 0.1, 07.11.2024
 */
public class FileManipulator extends AbstractFileActor {

  private static final String P_RENAME = "renameTo";
  private static final String P_COPY = "copyFrom";
  private static final String P_MOVE = "moveFrom";
  private static final String P_DUPLICATE = "duplicate";
  private static final String P_ZIP = "zip";
  private static final String P_UNZIP = "unzip";

  public void run(HttpExchange exchange) {
    try {
      super.run(exchange);
      String query = exchange.getRequestURI().getQuery();
      if (query != null) {
        String[] params = query.split(FileServer.STR_EQUAL);
        switch (params[0]) {
          case P_RENAME:
            h.inspectFileName(params[1]);
            String neuerDateiName = new Renamer().umbenennen(fileName, params[1], file);
            antwort(exchange, HttpResponder.SC_OK, neuerDateiName);
            break;
          case P_COPY:
            h.inspectFileName(params[1]);
            copyOrMove(exchange, params[1], fileName, Mover.OP_COPY);
            break;
          case P_MOVE:
            h.inspectFileName(params[1]);
            copyOrMove(exchange, params[1], fileName, Mover.OP_MOVE);
            break;
          case P_DUPLICATE:
            if (Boolean.parseBoolean(params[1])) {
              String dup = new Duplicator().duplizieren(base, fileName);
              //logger.fine("neuer Name: " + neuerDateiName);
              antwort(exchange, HttpResponder.SC_OK, dup);
            }
            break;
          case P_ZIP:
            String path = exchange.getRequestURI().toString();
            zipAntwort(exchange, new Deflator().packFolder(fileName, path, base));
            break;
          case P_UNZIP:
            path = exchange.getRequestURI().toString();
            zipAntwort(exchange, new Inflator().extractZipfile(fileName, path, base));
            break;
          default:
            antwort(exchange, HttpResponder.SC_NOT_FOUND, "ungueltige Anfrage");
            break;
        }
      } else {
        if (fileName.endsWith(FileServer.STR_SLASH)) {
          antwort(exchange, HttpResponder.SC_METHOD_NOT_ALLOWED, "PUT nicht erlaubt, POST verwenden.");
        } else {
          speichern(exchange);
        }
      }
    } catch (IOException | IllegalArgumentException ex) {
      fehlerAntwort(exchange, ex);
    } finally {
      free();
    }
  }

  private void copyOrMove(HttpExchange exchange, String quelle, String ziel, int op) throws IOException {
    String[] dateiNamen = dateiliste(exchange);
    new Mover().copyOrMoveFiles(quelle, ziel, dateiNamen, op, base);
    antwort(exchange, HttpResponder.SC_OK, "Dateien verarbeitet.");
  }

  private void zipAntwort(HttpExchange exchange, String antw) throws IOException {
    if (antw.equalsIgnoreCase("ok")) {
      antwort(exchange, HttpResponder.SC_OK, antw);
    } else {
      antwort(exchange, HttpResponder.SC_UNPROCESSABLE_ENTITY, antw);
    }
  }
}