/*
  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.google.gson.Gson;
import com.sun.net.httpserver.HttpExchange;
import de.uhilger.neon.FileServer;
import de.uhilger.neon.HttpHelper;
import de.uhilger.neon.HttpResponder;
import de.uhilger.fm.Writer;
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Abstrakte Basisklasse mit gemeinsamen Methoden fuer Dateioperationen
 * 
 * @author Ulrich Hilger
 * @version 0.1, 07.11.2024
 */
public abstract class AbstractFileActor {

  protected File file;
  protected String fileName;
  protected HttpHelper h;
  protected String base;

  public void run(HttpExchange exchange) {
    base = exchange.getHttpContext().getAttributes().get(FileServer.ATTR_FILE_BASE).toString();
    h = new HttpHelper();
    fileName = h.getFileName(exchange);
    file = new File(base, fileName);
  }

  protected String[] dateiliste(HttpExchange exchange) throws IOException {
    String body = h.bodyLesen(exchange);
    //logger.fine("dateien: " + body);
    Gson gson = new Gson();
    return gson.fromJson(body, String[].class);
  }

  protected void speichern(HttpExchange e) throws IOException {
    String body = h.bodyLesen(e);
    if (new Writer().speichern(file, body) == 0) {
      antwort(e, HttpResponder.SC_OK, file.getAbsolutePath());
    } else {
      antwort(e, HttpResponder.SC_INTERNAL_SERVER_ERROR, "speichern fehlgeschlagen");
    }
  }

  protected void fehlerAntwort(HttpExchange exchange, Exception ex) {
    try {
      Logger.getLogger(AbstractFileActor.class.getName()).log(Level.SEVERE, ex.getMessage(), ex);
      antwort(exchange, HttpResponder.SC_NOT_FOUND, ex.getMessage());
    } catch (IOException ex1) {
      Logger.getLogger(AbstractFileActor.class.getName()).log(Level.SEVERE, ex.getMessage(), ex1);
    }
  }

  protected void antwort(HttpExchange exchange, int code, String text) throws IOException {
    new HttpResponder().antwortSenden(exchange, code, text);
  }

  protected void free() {
    file = null;
    fileName = null;
    h = null;
    base = null;
  }
}