/*
    * ====================================================================
    * 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.client5.http.async.methods;
  
  import java.nio.charset.Charset;
  import java.nio.charset.StandardCharsets;
  
  import org.apache.hc.core5.http.ContentType;
  import org.apache.hc.core5.util.Args;
  
  /**
   * Message body representation as a simple text string or an array of bytes.
   *
   * @since 5.0
   */
  public final class SimpleBody {
  
      private final byte[] bodyAsBytes;
      private final String bodyAsText;
      private final ContentType contentType;
  
      SimpleBody(final byte[] bodyAsBytes, final String bodyAsText, final ContentType contentType) {
          this.bodyAsBytes = bodyAsBytes;
          this.bodyAsText = bodyAsText;
          this.contentType = contentType;
      }
  
      static SimpleBody create(final String body, final ContentType contentType) {
          Args.notNull(body, "Body");
          if (body.length() > 2048) {
              return new SimpleBody(null, body, contentType);
          }
          final Charset charset = (contentType != null ? contentType : ContentType.DEFAULT_TEXT).getCharset();
          final byte[] bytes = body.getBytes(charset != null ? charset : StandardCharsets.US_ASCII);
          return new SimpleBody(bytes, null, contentType);
      }
  
      static SimpleBody create(final byte[] body, final ContentType contentType) {
          Args.notNull(body, "Body");
          return new SimpleBody(body, null, contentType);
      }
  
      /**
       * Gets the content type.
       *
       * @return the content type.
       */
      public ContentType getContentType() {
          return contentType;
      }
  
      /**
       * Gets the body as a byte array.
       *
       * @return the body as a byte array.
       */
      public byte[] getBodyBytes() {
          if (bodyAsBytes != null) {
              return bodyAsBytes;
          } else if (bodyAsText != null) {
              final Charset charset = (contentType != null ? contentType : ContentType.DEFAULT_TEXT).getCharset();
              return bodyAsText.getBytes(charset != null ? charset : StandardCharsets.US_ASCII);
          } else {
              return null;
          }
      }
  
      /**
       * Gets the body as a String.
       *
       * @return the body as a String.
       */
      public String getBodyText() {
          if (bodyAsBytes != null) {
             final Charset charset = (contentType != null ? contentType : ContentType.DEFAULT_TEXT).getCharset();
             return new String(bodyAsBytes, charset != null ? charset : StandardCharsets.US_ASCII);
         }
         return bodyAsText;
     }
 
     /**
      * Tests whether the body is currently cached as a String.
      *
      * @return whether the body is currently cached as a String.
      */
     public boolean isText() {
         return bodyAsText != null;
     }
 
     /**
      * Tests whether the body is currently cached as a byte array.
      *
      * @return whether the body is currently cached as a byte array.
      */
     public boolean isBytes() {
         return bodyAsBytes != null;
     }
 
     @Override
     public String toString() {
         return "SimpleBody{content length=" + (bodyAsBytes != null ? bodyAsBytes.length : "chunked") +
                 ", content type=" + contentType + "}";
     }
 
 }