/*
    * Copyright 2025 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:
    *
    *   https://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.uring;
  
  import io.netty.buffer.ByteBufAllocator;
  import io.netty.channel.ChannelException;
  import io.netty.channel.ChannelOption;
  import io.netty.channel.MessageSizeEstimator;
  import io.netty.channel.RecvByteBufAllocator;
  import io.netty.channel.WriteBufferWaterMark;
  import io.netty.channel.socket.DuplexChannelConfig;
  import io.netty.channel.unix.DomainSocketChannelConfig;
  import io.netty.channel.unix.DomainSocketReadMode;
  import io.netty.util.internal.ObjectUtil;
  
  import java.io.IOException;
  import java.util.Map;
  import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
  
  import static io.netty.channel.ChannelOption.ALLOW_HALF_CLOSURE;
  import static io.netty.channel.ChannelOption.SO_RCVBUF;
  import static io.netty.channel.ChannelOption.SO_SNDBUF;
  import static io.netty.channel.unix.UnixChannelOption.DOMAIN_SOCKET_READ_MODE;
  
  final class IoUringDomainSocketChannelConfig extends IoUringStreamChannelConfig
          implements DomainSocketChannelConfig, DuplexChannelConfig {
      @SuppressWarnings("checkstyle:LineLength") //Avoid Checkstyle thinking this is too long
      private static final AtomicReferenceFieldUpdater<IoUringDomainSocketChannelConfig, DomainSocketReadMode> MODE_UPDATER =
              AtomicReferenceFieldUpdater.newUpdater(IoUringDomainSocketChannelConfig.class, DomainSocketReadMode.class, "mode");
  
      private volatile DomainSocketReadMode mode = DomainSocketReadMode.BYTES;
      private volatile boolean allowHalfClosure;
  
      IoUringDomainSocketChannelConfig(IoUringDomainSocketChannel channel) {
          super(channel);
      }
  
      @Override
      public Map<ChannelOption<?>, Object> getOptions() {
          return getOptions(super.getOptions(), DOMAIN_SOCKET_READ_MODE, ALLOW_HALF_CLOSURE, SO_SNDBUF, SO_RCVBUF);
      }
  
      @Override
      public <T> T getOption(ChannelOption<T> option) {
          if (option == DOMAIN_SOCKET_READ_MODE) {
              return (T) getReadMode();
          }
          if (option == ALLOW_HALF_CLOSURE) {
              return (T) Boolean.valueOf(isAllowHalfClosure());
          }
          if (option == SO_SNDBUF) {
              return (T) Integer.valueOf(getSendBufferSize());
          }
          if (option == SO_RCVBUF) {
              return (T) Integer.valueOf(getReceiveBufferSize());
          }
          return super.getOption(option);
      }
  
      @Override
      public <T> boolean setOption(ChannelOption<T> option, T value) {
          validate(option, value);
  
          if (option == DOMAIN_SOCKET_READ_MODE) {
              setReadMode((DomainSocketReadMode) value);
          } else if (option == ALLOW_HALF_CLOSURE) {
              setAllowHalfClosure((Boolean) value);
          } else if (option == SO_SNDBUF) {
              setSendBufferSize((Integer) value);
          } else if (option == SO_RCVBUF) {
              setReceiveBufferSize((Integer) value);
          } else {
              return super.setOption(option, value);
          }
  
          return true;
      }
  
      public int getSendBufferSize() {
          try {
              return ((IoUringDomainSocketChannel) channel).socket.getSendBufferSize();
          } catch (IOException e) {
              throw new ChannelException(e);
          }
      }
  
     public IoUringDomainSocketChannelConfig setSendBufferSize(int sendBufferSize) {
         try {
             ((IoUringDomainSocketChannel) channel).socket.setSendBufferSize(sendBufferSize);
             return this;
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     public int getReceiveBufferSize() {
         try {
             return ((IoUringDomainSocketChannel) channel).socket.getReceiveBufferSize();
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     public IoUringDomainSocketChannelConfig setReceiveBufferSize(int receiveBufferSize) {
         try {
             ((IoUringDomainSocketChannel) channel).socket.setReceiveBufferSize(receiveBufferSize);
             return this;
         } catch (IOException e) {
             throw new ChannelException(e);
         }
     }
 
     @Override
     public IoUringDomainSocketChannelConfig setReadMode(DomainSocketReadMode mode) {
         ObjectUtil.checkNotNull(mode, "mode");
         DomainSocketReadMode expectedMode = mode == DomainSocketReadMode.BYTES ?
                 DomainSocketReadMode.FILE_DESCRIPTORS : DomainSocketReadMode.BYTES;
         boolean change = MODE_UPDATER.compareAndSet(this, expectedMode, mode);
         if (change) {
             if (channel.isRegistered()) {
                 // cancel current Read
                 ((IoUringDomainSocketChannel) channel).autoReadCleared();
             }
         }
         return this;
     }
 
     @Override
     public DomainSocketReadMode getReadMode() {
         return mode;
     }
 
     @Override
     public boolean isAllowHalfClosure() {
         return allowHalfClosure;
     }
 
     @Override
     public DuplexChannelConfig setAllowHalfClosure(boolean allowHalfClosure) {
         this.allowHalfClosure = allowHalfClosure;
         return this;
     }
 
     @Override
     public IoUringDomainSocketChannelConfig setMaxMessagesPerRead(int maxMessagesPerRead) {
         super.setMaxMessagesPerRead(maxMessagesPerRead);
         return this;
     }
 
     @Override
     public IoUringDomainSocketChannelConfig setConnectTimeoutMillis(int connectTimeoutMillis) {
         super.setConnectTimeoutMillis(connectTimeoutMillis);
         return this;
     }
 
     @Override
     public IoUringDomainSocketChannelConfig setWriteSpinCount(int writeSpinCount) {
         super.setWriteSpinCount(writeSpinCount);
         return this;
     }
 
     @Override
     public IoUringDomainSocketChannelConfig setAllocator(ByteBufAllocator allocator) {
         super.setAllocator(allocator);
         return this;
     }
 
     @Override
     public IoUringDomainSocketChannelConfig setRecvByteBufAllocator(RecvByteBufAllocator allocator) {
         super.setRecvByteBufAllocator(allocator);
         return this;
     }
 
     @Override
     public IoUringDomainSocketChannelConfig setAutoRead(boolean autoRead) {
         super.setAutoRead(autoRead);
         return this;
     }
 
     @Override
     public IoUringDomainSocketChannelConfig setAutoClose(boolean autoClose) {
         super.setAutoClose(autoClose);
         return this;
     }
 
     @Override
     public IoUringDomainSocketChannelConfig setWriteBufferLowWaterMark(int writeBufferLowWaterMark) {
         super.setWriteBufferLowWaterMark(writeBufferLowWaterMark);
         return this;
     }
 
     @Override
     public IoUringDomainSocketChannelConfig setMessageSizeEstimator(MessageSizeEstimator estimator) {
         super.setMessageSizeEstimator(estimator);
         return this;
     }
 
     @Override
     public IoUringDomainSocketChannelConfig setWriteBufferWaterMark(WriteBufferWaterMark writeBufferWaterMark) {
         super.setWriteBufferWaterMark(writeBufferWaterMark);
         return this;
     }
 
     @Override
     public IoUringDomainSocketChannelConfig setWriteBufferHighWaterMark(int writeBufferHighWaterMark) {
         super.setWriteBufferHighWaterMark(writeBufferHighWaterMark);
         return this;
     }
 }