/*
    * This file is part of Waarp Project (named also Waarp or GG).
    *
    *  Copyright (c) 2019, Waarp SAS, and individual contributors by the @author
    *  tags. See the COPYRIGHT.txt in the distribution for a full listing of
    * individual contributors.
    *
    *  All Waarp Project is free software: you can redistribute it and/or
    * modify it under the terms of the GNU General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or (at your
   * option) any later version.
   *
   * Waarp 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 General Public License for more details.
   *
   *  You should have received a copy of the GNU General Public License along with
   * Waarp . If not, see <http://www.gnu.org/licenses/>.
   */
  package org.waarp.openr66.protocol.networkhandler;
  
  import io.netty.channel.ChannelInitializer;
  import io.netty.channel.ChannelPipeline;
  import io.netty.channel.socket.SocketChannel;
  import io.netty.handler.timeout.IdleStateHandler;
  import io.netty.handler.traffic.ChannelTrafficShapingHandler;
  import io.netty.handler.traffic.GlobalTrafficShapingHandler;
  import org.waarp.common.logging.WaarpLogger;
  import org.waarp.common.logging.WaarpLoggerFactory;
  import org.waarp.openr66.protocol.configuration.Configuration;
  import org.waarp.openr66.protocol.exception.OpenR66ProtocolNetworkException;
  import org.waarp.openr66.protocol.networkhandler.packet.NetworkPacketCodec;
  
  import java.util.concurrent.TimeUnit;
  
  /**
   * NetworkServer pipeline (Requester side)
   */
  public class NetworkServerInitializer
      extends ChannelInitializer<SocketChannel> {
    /**
     * Internal Logger
     */
    private static final WaarpLogger logger =
        WaarpLoggerFactory.getLogger(NetworkServerInitializer.class);
  
    public static final String TIMEOUT = "timeout";
    public static final String LIMITGLOBAL = "GLOBALLIMIT";
    public static final String LIMITCHANNEL = "CHANNELLIMIT";
    public static final String NETWORK_CODEC = "codec";
    public static final String NETWORK_HANDLER = "handler";
  
    protected final boolean server;
  
    public NetworkServerInitializer(final boolean server) {
      this.server = server;
    }
  
    @Override
    protected void initChannel(final SocketChannel ch) throws Exception {
      final ChannelPipeline pipeline = ch.pipeline();
      logger.debug("Create IdleStateHandler with {} ms",
                   Configuration.configuration.getTimeoutCon());
      pipeline.addLast(TIMEOUT, new IdleStateHandler(true, 0, 0,
                                                     Configuration.configuration.getTimeoutCon(),
                                                     TimeUnit.MILLISECONDS));
      // Global limitation
      final GlobalTrafficShapingHandler handler =
          Configuration.configuration.getGlobalTrafficShapingHandler();
      if (handler == null) {
        throw new OpenR66ProtocolNetworkException(
            "Error at pipeline initialization," +
            " GlobalTrafficShapingHandler configured.");
      }
      pipeline.addLast(LIMITGLOBAL, handler);
      // Per channel limitation
      pipeline.addLast(LIMITCHANNEL, new ChannelTrafficShapingHandler(
          Configuration.configuration.getServerChannelWriteLimit(),
          Configuration.configuration.getServerChannelReadLimit(),
          Configuration.configuration.getDelayLimit(),
          Configuration.configuration.getTimeoutCon()));
      pipeline.addLast(NETWORK_CODEC, new NetworkPacketCodec());
      pipeline.addLast(Configuration.configuration.getHandlerGroup(),
                       NETWORK_HANDLER, new NetworkServerHandler());
    }
  }