/*
    Calypso - Media Player Remote Control via HTTP for Raspberry Pi
    Copyright (C) 2021-2023  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.calypso;

import com.sun.net.httpserver.HttpServer;
import de.uhilger.calypso.handler.BasePlayer;
import de.uhilger.calypso.handler.CmdHandler;
import de.uhilger.calypso.handler.DBusHandler;
import de.uhilger.calypso.handler.FileHandler;
import de.uhilger.calypso.handler.LogHandler;
import de.uhilger.calypso.handler.OMXPlayer;
import de.uhilger.calypso.handler.PingHandler;
import de.uhilger.calypso.handler.PlayHandler;
import de.uhilger.calypso.handler.PlayOnHandler;
import de.uhilger.calypso.handler.SeekHandler;
import de.uhilger.calypso.handler.StopServerHandler;
import de.uhilger.calypso.handler.VLCKillHandler;
import de.uhilger.calypso.handler.VLCPlayer;
import de.uhilger.calypso.handler.VLCSeekHandler;
import java.io.IOException;
import java.util.logging.Logger;
import java.net.InetSocketAddress;
import java.util.concurrent.Executors;
import java.util.logging.Level;

/**
 * Die Klasse Server implementiert die HTTP-Schnittstelle zum 
 * Mediaplayer. Es wird ein Player-Prozesss fuer das Abspielen 
 * eines Titels gestartet. Mit Stopp oder Ende des Titels endet 
 * auch der Abspielprozess.<br>
 * <br>
 * zum Abspielen:<br>
 * /calypso/play?title=http://ein.titel.mp3&r=http://rueckmelde.url<br>
 * <br>
 * waehrend des Abspielens:<br>
 * /calypso/pause<br>
 * /calypso/seek?pos=[sekunden]<br>
 * /calypso/stop<br>
 * <br>
 * sonstige Funktionen:<br>
 * /calypso/ping<br>
 * /calypso/server/stop<br>
 * <br>
 * verworfene Funktionen<br>
 * /calypso/vol-inc<br>
 * /calypso/vol-dec<br>
 * Die Lautstaerke wird in aller Regel am Geraet geregelt, an das der 
 * Zuspieler (der Raspi) angeschlossen ist. Eine Regelung ueber den 
 * Zuspieler ist daher eher selten erforderlich.
 * 
 * @author Ulrich Hilger
 */
public class Server {

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

  private int port;

  private String contextName;

  public Server(int port) {
    this.port = port;
  }

  public void setPort(int port) {
    this.port = port;
  }

  /**
   *
   * @param contextName e.g. '/calypso' or '/cal'
   */
  public void setContextName(String contextName) {
    this.contextName = contextName;
  }

  public void start(String playerType) throws IOException {
    logger.log(Level.INFO, "Server starting on port {0}", port);

    HttpServer server = HttpServer.create(new InetSocketAddress(port), 0);
    server.createContext(contextName + "/play", new PlayHandler(BasePlayer.F_PLAY));
    if (playerType.equals(App.OMX_PLAYER)) {
      server.createContext(contextName + "/seek", new SeekHandler(OMXPlayer.F_SEEK));
      server.createContext(contextName + "/stop", new CmdHandler(OMXPlayer.CMD_STOP));
      server.createContext(contextName + "/pause", new CmdHandler(OMXPlayer.CMD_PAUSE_RESUME));
      server.createContext(contextName + "/vol-inc", new CmdHandler(OMXPlayer.CMD_INC_VOL));
      server.createContext(contextName + "/vol-dec", new CmdHandler(OMXPlayer.CMD_DEC_VOL));
      server.createContext(contextName + "/info", new CmdHandler(OMXPlayer.CMD_TOGGLE_INFO));
      server.createContext(contextName + "/log", new LogHandler());
      server.createContext(contextName + "/playon", new PlayOnHandler(OMXPlayer.F_PLAY_ON));
    } else if (playerType.equals(App.VLC_PLAYER)) {
      server.createContext(contextName + "/pause", new DBusHandler(VLCPlayer.CMD_PAUSE_RESUME));
      //server.createContext(contextName + "/seek", new DBusHandler(VLCPlayer.CMD_SEEK));
      server.createContext(contextName + "/seek", new VLCSeekHandler(VLCPlayer.CMD_SEEK));
      server.createContext(contextName + "/stop", new VLCKillHandler());
    }
    server.createContext(contextName + "/ui", new FileHandler(App.getInitParameter(App.IP_WWW_DATA)));
    server.createContext(contextName + "/ping", new PingHandler(BasePlayer.F_PING));
    server.createContext(contextName + "/server/stop", new StopServerHandler());
    //server.setExecutor(null); // creates a default executor
    server.setExecutor(Executors.newFixedThreadPool(20));
    server.start();
  }

}