/*
    * Copyright 2015 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.netty5.handler.codec.http2;
  
  import io.netty5.buffer.api.Buffer;
  import io.netty5.buffer.api.BufferAllocator;
  import io.netty5.channel.ChannelHandler;
  import io.netty5.channel.ChannelHandlerContext;
  import io.netty5.microbench.channel.EmbeddedChannelWriteReleaseHandlerContext;
  import io.netty5.microbench.util.AbstractMicrobenchmark;
  import org.openjdk.jmh.annotations.Benchmark;
  import org.openjdk.jmh.annotations.BenchmarkMode;
  import org.openjdk.jmh.annotations.Fork;
  import org.openjdk.jmh.annotations.Level;
  import org.openjdk.jmh.annotations.Measurement;
  import org.openjdk.jmh.annotations.Mode;
  import org.openjdk.jmh.annotations.OutputTimeUnit;
  import org.openjdk.jmh.annotations.Param;
  import org.openjdk.jmh.annotations.Scope;
  import org.openjdk.jmh.annotations.Setup;
  import org.openjdk.jmh.annotations.State;
  import org.openjdk.jmh.annotations.TearDown;
  import org.openjdk.jmh.annotations.Warmup;
  
  import java.util.concurrent.TimeUnit;
  
  import static io.netty5.buffer.api.BufferAllocator.onHeapPooled;
  import static io.netty5.buffer.api.BufferAllocator.onHeapUnpooled;
  
  @Fork(1)
  @Warmup(iterations = 5)
  @Measurement(iterations = 5)
  @State(Scope.Benchmark)
  @OutputTimeUnit(TimeUnit.NANOSECONDS)
  public class Http2FrameWriterDataBenchmark extends AbstractMicrobenchmark {
      @Param({ "64", "1024", "4096", "16384", "1048576", "4194304" })
      public int payloadSize;
  
      @Param({ "0", "100", "255" })
      public int padding;
  
      @Param({ "true", "false" })
      public boolean pooled;
  
      private Buffer payload;
      private ChannelHandlerContext ctx;
      private Http2DataWriter writer;
      private Http2DataWriter oldWriter;
      private BufferAllocator allocator;
  
      @Setup(Level.Trial)
      public void setup() {
          writer = new DefaultHttp2FrameWriter();
          allocator = pooled ? onHeapPooled() : onHeapUnpooled();
          payload = allocator.allocate(payloadSize);
          for (int i = 0; i < payloadSize; i++) {
              payload.writeByte((byte) 0);
          }
          payload.makeReadOnly();
          ctx = new EmbeddedChannelWriteReleaseHandlerContext(allocator, new ChannelHandler() { }) {
              @Override
              protected void handleException(Throwable t) {
                  handleUnexpectedException(t);
              }
          };
      }
  
      @TearDown(Level.Trial)
      public void teardown() throws Exception {
          if (payload != null) {
              payload.close();
          }
          if (ctx != null) {
              ctx.close();
          }
          allocator.close();
      }
  
      @Benchmark
      @BenchmarkMode(Mode.AverageTime)
      public void newWriter() {
          writer.writeData(ctx, 3, payload.copy(true), padding, true);
          ctx.flush();
      }
  }