/*
    * ====================================================================
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.hc.core5.testing.nio;
  
  import java.io.IOException;
  import java.nio.CharBuffer;
  import java.nio.charset.Charset;
  import java.nio.charset.StandardCharsets;
  
  import org.apache.hc.core5.http.ContentType;
  import org.apache.hc.core5.http.nio.StreamChannel;
  import org.apache.hc.core5.http.nio.entity.AbstractCharAsyncEntityProducer;
  
  public class MultiLineEntityProducer extends AbstractCharAsyncEntityProducer {
  
      private final String text;
      private final int total;
      private final CharBuffer charbuf;
  
      private int count;
  
      public MultiLineEntityProducer(final String text, final int total, final Charset charset) {
          super(1024, -1, ContentType.TEXT_PLAIN.withCharset(charset));
          this.text = text;
          this.total = total;
          this.charbuf = CharBuffer.allocate(4096);
          this.count = 0;
      }
  
      public MultiLineEntityProducer(final String text, final int total) {
          this(text, total, StandardCharsets.US_ASCII);
      }
  
      @Override
      public boolean isRepeatable() {
          return true;
      }
  
      @Override
      protected int availableData() {
          return Integer.MAX_VALUE;
      }
  
      @Override
      protected void produceData(final StreamChannel<CharBuffer> channel) throws IOException {
          while (charbuf.remaining() > text.length() + 2 && count < total) {
              charbuf.put(text + "\r\n");
              count++;
          }
          if (charbuf.position() > 0) {
              charbuf.flip();
              channel.write(charbuf);
              charbuf.compact();
          }
          if (count >= total && charbuf.position() == 0) {
              channel.endStream();
          }
      }
  
      @Override
      public void failed(final Exception cause) {
      }
  
      @Override
      public void releaseResources() {
          count = 0;
          charbuf.clear();
          super.releaseResources();
      }
  
  }