/*
    AV-Direktor - Control OMXPlayer on Raspberry Pi via HTTP
    Copyright (C) 2021  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.avdirektor.handler;

import com.sun.net.httpserver.HttpExchange;
import de.uhilger.avdirektor.App;
import java.io.IOException;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * Play
 *
 * rpi4-az:9090/avd/play?titel=/Filme/S/sound_city.m4v&th=60&ti=60&o=local
 *
 * OMXPlayer.abspielenMitParameternUndRueckmeldung( String urlStr, String
 * parameter, String meldeUrlStr, String token)
 *
 * Parameter des Aufrufs play als query (th threshold, ti timeout)
 *
 * ?titel=/Filme/S/sound_city.m4v &ti=60 &th=60 &o=local|hdmi|both
 * &r=http://uhilger.de/mc/api/usw
 *
 * r muss ganz wegbleiben, wenn keine Rueckmeldung gewuescht ist
 *
 * @author ulrich
 */
public class PlayHandler extends CmdHandler {

  private static final Logger logger = Logger.getLogger(PlayHandler.class.getName());

  public PlayHandler(String cmd) {
    super(cmd);
  }

  protected StringBuilder buildParams(HttpExchange t) {
    StringBuilder params = super.buildParams(t);
    params.append("-b -o ");
    params.append(getParam(map, "o"));
    params.append(" --threshold ");
    params.append(getParam(map, "th"));
    params.append(" --timeout ");
    params.append(getParam(map, "ti"));
    String log = getParam(map, "log");
    if (log != null && log.equalsIgnoreCase("true")) {
      params.append(" --genlog");
    }
    return params;
  }

  @Override
  protected String process(HttpExchange t, String params) {
    if (cmd.equalsIgnoreCase(OMXPlayer.F_PLAY)) {
      try {
        //FileUtils.deleteDirectory(new File(System.getProperty("omx.wd"), "omx-logs"));
        FileSystem fs = FileSystems.getDefault();
        Path path = fs.getPath(System.getProperty("omx.wd"), "omx-logs");
        deleteDirectory(path);
        //Files.delete(path);
      } catch (IOException ex) {
        logger.log(Level.SEVERE, null, ex);
      }
    }
    String antwort = App.getPlayer().abspielen(
            getParam(map, "titel"), params, getParam(map, "r"), "1");
    logger.log(Level.FINE, antwort);
    return antwort;
  }

  protected void deleteDirectory(Path start) throws IOException {
    Files.walkFileTree(start, new SimpleFileVisitor<Path>() {
      @Override
      public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
              throws IOException {
        Files.delete(file);
        return FileVisitResult.CONTINUE;
      }

      @Override
      public FileVisitResult postVisitDirectory(Path dir, IOException e)
              throws IOException {
        if (e == null) {
          Files.delete(dir);
          return FileVisitResult.CONTINUE;
        } else {
          // directory iteration failed
          throw e;
        }
      }
    });
  }

}