/*
  Mediazentrale - Personal Media Center
  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.mediaz;

import com.sun.net.httpserver.HttpServer;
import de.uhilger.mediaz.api.AblageTestHandler;
import de.uhilger.mediaz.api.FileHandler;
import de.uhilger.mediaz.api.StopServerHandler;
import de.uhilger.mediaz.api.StoreTestHandler;
import java.io.File;
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 stellt Methoden zur Ausf&uuml;hrung eines 
 * HTTP-Servers bereit
 * 
 * @author Ulrich Hilger
 * @version 0.1, 25.03.2021
 */
public class Server {
  
  private static final Logger logger = Logger.getLogger(Server.class.getName());
  
  public static final String RB_SERVER_START_MSG = "msgServerStart";
  public static final String RB_WEBROOT = "webroot";
  public static final String RB_UI_ROOT = "uiroot";
  public static final String RB_STOP_SERVER = "stopServer";
  public static final String RB_ABLAGE_TEST = "testAblage";
  public static final String RB_STORE_TEST = "testStore";
  public static final String RB_SLASH = "slash";
  
  private int port;
  
  private String ctx;
  
  /**
   * Ein neues Objekt der Kalsse Server erzeugen
   * @param port  der Port, &uuml;ber den dieser Server erreichbar sein soll
   */
  public Server(int port) {
    this.port = port;
  }
  
  /**
   * Den Port angeben, unter dem der Server erreichbar sein soll
   * 
   * @param port der Port, unter dem der Server erreichbar sein soll
   */
  public void setPort(int port) {
    this.port = port;
  }
  
  /**
   * Den Namen des Kontexts angeben, &uuml;ber den dieser Server 
   * erreichbar sein soll
   * @param ctxName Name des Kontexts, unter dem der Server aufrufbar sein soll
   */
  public void setContextName(String ctxName) {
    String slash = App.getRs(RB_SLASH);
    if(!ctxName.startsWith(slash)) {
      this.ctx = slash + ctxName;
    } else {
      this.ctx = ctxName;
    }
  }
  
  /**
   * Die Endpunkte ('Context'e) einrichten, unter denen die Dienste 
   * dieses Servers erreichbar sein sollen und den Server starten
   * 
   * @throws IOException wenn etwas schief geht, finden sich Angaben 
   * in diesem Objekt 
   */
  public void start() throws IOException {
    logger.log(Level.INFO, App.getRs(RB_SERVER_START_MSG), Integer.toString(port));
    
    String ui = App.getInitParameter(App.getRs(App.RB_AP_UI));
    
    File uiDir = new File(ui);

    HttpServer server = HttpServer.create(new InetSocketAddress(port), 0);
    server.createContext(ctx + App.getRs(RB_WEBROOT), new FileHandler(App.getInitParameter(App.getRs(App.RB_AP_WWW_DATA))));
    server.createContext(ctx + App.getRs(RB_UI_ROOT), new FileHandler(uiDir.getAbsolutePath()));    
    server.createContext(ctx + App.getRs(RB_STOP_SERVER), new StopServerHandler());
    server.createContext(ctx + App.getRs(RB_ABLAGE_TEST), new AblageTestHandler());
    server.createContext(ctx + App.getRs(RB_STORE_TEST), new StoreTestHandler());
    server.setExecutor(Executors.newFixedThreadPool(20));
    server.start();
  }

}