/*
    * Copyright 2016 The Netty Project
    *
    * The Netty Project licenses this file to you under the Apache License,
    * version 2.0 (the "License"); you may not use this file except in compliance
    * with the License. You may obtain a copy of the License at:
    *
    *   http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   * License for the specific language governing permissions and limitations
   * under the License.
   */
  package io.netty.channel.kqueue;
  
  import io.netty.buffer.ByteBufAllocator;
  import io.netty.channel.ChannelException;
  import io.netty.channel.ChannelOption;
  import io.netty.channel.FixedRecvByteBufAllocator;
  import io.netty.channel.MessageSizeEstimator;
  import io.netty.channel.RecvByteBufAllocator;
  import io.netty.channel.WriteBufferWaterMark;
  import io.netty.channel.socket.DatagramChannelConfig;
  import io.netty.util.internal.UnstableApi;
  
  import java.io.IOException;
  import java.net.InetAddress;
  import java.net.NetworkInterface;
  import java.util.Map;
  
  import static io.netty.channel.ChannelOption.DATAGRAM_CHANNEL_ACTIVE_ON_REGISTRATION;
  import static io.netty.channel.ChannelOption.IP_MULTICAST_ADDR;
  import static io.netty.channel.ChannelOption.IP_MULTICAST_IF;
  import static io.netty.channel.ChannelOption.IP_MULTICAST_LOOP_DISABLED;
  import static io.netty.channel.ChannelOption.IP_MULTICAST_TTL;
  import static io.netty.channel.ChannelOption.IP_TOS;
  import static io.netty.channel.ChannelOption.SO_BROADCAST;
  import static io.netty.channel.ChannelOption.SO_RCVBUF;
  import static io.netty.channel.ChannelOption.SO_REUSEADDR;
  import static io.netty.channel.ChannelOption.SO_SNDBUF;
  import static io.netty.channel.unix.UnixChannelOption.SO_REUSEPORT;
  
  @UnstableApi
  public final class KQueueDatagramChannelConfig extends KQueueChannelConfig implements DatagramChannelConfig {
      private static final RecvByteBufAllocator DEFAULT_RCVBUF_ALLOCATOR = new FixedRecvByteBufAllocator(2048);
      private final KQueueDatagramChannel datagramChannel;
      private boolean activeOnOpen;
  
      KQueueDatagramChannelConfig(KQueueDatagramChannel channel) {
          super(channel);
          this.datagramChannel = channel;
          setRecvByteBufAllocator(DEFAULT_RCVBUF_ALLOCATOR);
      }
  
      @Override
      @SuppressWarnings("deprecation")
      public Map<ChannelOption<?>, Object> getOptions() {
          return getOptions(
                  super.getOptions(),
                  SO_BROADCAST, SO_RCVBUF, SO_SNDBUF, SO_REUSEADDR, IP_MULTICAST_LOOP_DISABLED,
                  IP_MULTICAST_ADDR, IP_MULTICAST_IF, IP_MULTICAST_TTL,
                  IP_TOS, DATAGRAM_CHANNEL_ACTIVE_ON_REGISTRATION, SO_REUSEPORT);
      }
  
      @SuppressWarnings({ "unchecked", "deprecation" })
      @Override
      public <T> T getOption(ChannelOption<T> option) {
          if (option == SO_BROADCAST) {
              return (T) Boolean.valueOf(isBroadcast());
          }
          if (option == SO_RCVBUF) {
              return (T) Integer.valueOf(getReceiveBufferSize());
          }
          if (option == SO_SNDBUF) {
              return (T) Integer.valueOf(getSendBufferSize());
          }
          if (option == SO_REUSEADDR) {
              return (T) Boolean.valueOf(isReuseAddress());
          }
          if (option == IP_MULTICAST_LOOP_DISABLED) {
              return (T) Boolean.valueOf(isLoopbackModeDisabled());
          }
          if (option == IP_MULTICAST_ADDR) {
              return (T) getInterface();
          }
          if (option == IP_MULTICAST_IF) {
              return (T) getNetworkInterface();
          }
          if (option == IP_MULTICAST_TTL) {
              return (T) Integer.valueOf(getTimeToLive());
          }
          if (option == IP_TOS) {
              return (T) Integer.valueOf(getTrafficClass());
          }
          if (option == DATAGRAM_CHANNEL_ACTIVE_ON_REGISTRATION) {
              return (T) Boolean.valueOf(activeOnOpen);
          }
         if (option == SO_REUSEPORT) {
             return (T) Boolean.valueOf(isReusePort());
         }
         return super.getOption(option);
     }
 
     @Override
     @SuppressWarnings("deprecation")
     public <T> boolean setOption(ChannelOption<T> option, T value) {
         validate(option, value);
 
         if (option == SO_BROADCAST) {
             setBroadcast((Boolean) value);
         } else if (option == SO_RCVBUF) {
             setReceiveBufferSize((Integer) value);
         } else if (option == SO_SNDBUF) {
             setSendBufferSize((Integer) value);
         } else if (option == SO_REUSEADDR) {
             setReuseAddress((Boolean) value);
         } else if (option == IP_MULTICAST_LOOP_DISABLED) {
             setLoopbackModeDisabled((Boolean) value);
         } else if (option == IP_MULTICAST_ADDR) {
             setInterface((InetAddress) value);
         } else if (option == IP_MULTICAST_IF) {
             setNetworkInterface((NetworkInterface) value);
         } else if (option == IP_MULTICAST_TTL) {
             setTimeToLive((Integer) value);
         } else if (option == IP_TOS) {
             setTrafficClass((Integer) value);
         } else if (option == DATAGRAM_CHANNEL_ACTIVE_ON_REGISTRATION) {
             setActiveOnOpen((Boolean) value);
         } else if (option == SO_REUSEPORT) {
             setReusePort((Boolean) value);
         } else {
             return super.setOption(option, value);
         }
 
         return true;
     }
 
     private void setActiveOnOpen(boolean activeOnOpen) {
         if (channel.isRegistered()) {
             throw new IllegalStateException("Can only changed before channel was registered");
         }
         this.activeOnOpen = activeOnOpen;
     }
 
     boolean getActiveOnOpen() {
         return activeOnOpen;
     }
 
     /**
      * Returns {@code true} if the SO_REUSEPORT option is set.
      */
     public boolean isReusePort() {
         try {
             return datagramChannel.socket.isReusePort();
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     /**
      * Set the SO_REUSEPORT option on the underlying Channel. This will allow to bind multiple
      * {@link KQueueSocketChannel}s to the same port and so accept connections with multiple threads.
      *
      * Be aware this method needs be called before {@link KQueueDatagramChannel#bind(java.net.SocketAddress)} to have
      * any affect.
      */
     public KQueueDatagramChannelConfig setReusePort(boolean reusePort) {
         try {
             datagramChannel.socket.setReusePort(reusePort);
             return this;
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     @Override
     public KQueueDatagramChannelConfig setRcvAllocTransportProvidesGuess(boolean transportProvidesGuess) {
         super.setRcvAllocTransportProvidesGuess(transportProvidesGuess);
         return this;
     }
 
     @Override
     public KQueueDatagramChannelConfig setMessageSizeEstimator(MessageSizeEstimator estimator) {
         super.setMessageSizeEstimator(estimator);
         return this;
     }
 
     @Override
     @Deprecated
     public KQueueDatagramChannelConfig setWriteBufferLowWaterMark(int writeBufferLowWaterMark) {
         super.setWriteBufferLowWaterMark(writeBufferLowWaterMark);
         return this;
     }
 
     @Override
     @Deprecated
     public KQueueDatagramChannelConfig setWriteBufferHighWaterMark(int writeBufferHighWaterMark) {
         super.setWriteBufferHighWaterMark(writeBufferHighWaterMark);
         return this;
     }
 
     @Override
     public KQueueDatagramChannelConfig setWriteBufferWaterMark(WriteBufferWaterMark writeBufferWaterMark) {
         super.setWriteBufferWaterMark(writeBufferWaterMark);
         return this;
     }
 
     @Override
     public KQueueDatagramChannelConfig setAutoClose(boolean autoClose) {
         super.setAutoClose(autoClose);
         return this;
     }
 
     @Override
     public KQueueDatagramChannelConfig setAutoRead(boolean autoRead) {
         super.setAutoRead(autoRead);
         return this;
     }
 
     @Override
     public KQueueDatagramChannelConfig setRecvByteBufAllocator(RecvByteBufAllocator allocator) {
         super.setRecvByteBufAllocator(allocator);
         return this;
     }
 
     @Override
     public KQueueDatagramChannelConfig setWriteSpinCount(int writeSpinCount) {
         super.setWriteSpinCount(writeSpinCount);
         return this;
     }
 
     @Override
     public KQueueDatagramChannelConfig setAllocator(ByteBufAllocator allocator) {
         super.setAllocator(allocator);
         return this;
     }
 
     @Override
     public KQueueDatagramChannelConfig setConnectTimeoutMillis(int connectTimeoutMillis) {
         super.setConnectTimeoutMillis(connectTimeoutMillis);
         return this;
     }
 
     @Override
     @Deprecated
     public KQueueDatagramChannelConfig setMaxMessagesPerRead(int maxMessagesPerRead) {
         super.setMaxMessagesPerRead(maxMessagesPerRead);
         return this;
     }
 
     @Override
     public int getSendBufferSize() {
         try {
             return datagramChannel.socket.getSendBufferSize();
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     @Override
     public KQueueDatagramChannelConfig setSendBufferSize(int sendBufferSize) {
         try {
             datagramChannel.socket.setSendBufferSize(sendBufferSize);
             return this;
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     @Override
     public int getReceiveBufferSize() {
         try {
             return datagramChannel.socket.getReceiveBufferSize();
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     @Override
     public KQueueDatagramChannelConfig setReceiveBufferSize(int receiveBufferSize) {
         try {
             datagramChannel.socket.setReceiveBufferSize(receiveBufferSize);
             return this;
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     @Override
     public int getTrafficClass() {
         try {
             return datagramChannel.socket.getTrafficClass();
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     @Override
     public KQueueDatagramChannelConfig setTrafficClass(int trafficClass) {
         try {
             datagramChannel.socket.setTrafficClass(trafficClass);
             return this;
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     @Override
     public boolean isReuseAddress() {
         try {
             return datagramChannel.socket.isReuseAddress();
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     @Override
     public KQueueDatagramChannelConfig setReuseAddress(boolean reuseAddress) {
         try {
             datagramChannel.socket.setReuseAddress(reuseAddress);
             return this;
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     @Override
     public boolean isBroadcast() {
         try {
             return datagramChannel.socket.isBroadcast();
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     @Override
     public KQueueDatagramChannelConfig setBroadcast(boolean broadcast) {
         try {
             datagramChannel.socket.setBroadcast(broadcast);
             return this;
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     @Override
     public boolean isLoopbackModeDisabled() {
         return false;
     }
 
     @Override
     public DatagramChannelConfig setLoopbackModeDisabled(boolean loopbackModeDisabled) {
         throw new UnsupportedOperationException("Multicast not supported");
     }
 
     @Override
     public int getTimeToLive() {
         return -1;
     }
 
     @Override
     public KQueueDatagramChannelConfig setTimeToLive(int ttl) {
         throw new UnsupportedOperationException("Multicast not supported");
     }
 
     @Override
     public InetAddress getInterface() {
         return null;
     }
 
     @Override
     public KQueueDatagramChannelConfig setInterface(InetAddress interfaceAddress) {
         throw new UnsupportedOperationException("Multicast not supported");
     }
 
     @Override
     public NetworkInterface getNetworkInterface() {
         return null;
     }
 
     @Override
     public KQueueDatagramChannelConfig setNetworkInterface(NetworkInterface networkInterface) {
         throw new UnsupportedOperationException("Multicast not supported");
     }
 }