/*
    * ====================================================================
    * 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.http.config;
  
  import java.nio.charset.Charset;
  import java.nio.charset.CodingErrorAction;
  import java.nio.charset.StandardCharsets;
  
  import org.apache.hc.core5.annotation.Contract;
  import org.apache.hc.core5.annotation.ThreadingBehavior;
  import org.apache.hc.core5.util.Args;
  
  /**
   * HTTP/1.1 char coding configuration.
   *
   * @since 4.3
   */
  @Contract(threading = ThreadingBehavior.IMMUTABLE)
  public class CharCodingConfig {
  
      public static final CharCodingConfig DEFAULT = new Builder().build();
  
      private static final Charset DEFAULT_CHARSET = StandardCharsets.US_ASCII;
  
      private final Charset charset;
      private final CodingErrorAction malformedInputAction;
      private final CodingErrorAction unmappableInputAction;
  
      CharCodingConfig(
              final Charset charset,
              final CodingErrorAction malformedInputAction,
              final CodingErrorAction unmappableInputAction) {
          super();
          this.charset = charset;
          this.malformedInputAction = malformedInputAction;
          this.unmappableInputAction = unmappableInputAction;
      }
  
      public Charset getCharset() {
          return charset;
      }
  
      public CodingErrorAction getMalformedInputAction() {
          return malformedInputAction;
      }
  
      public CodingErrorAction getUnmappableInputAction() {
          return unmappableInputAction;
      }
  
      @Override
      public String toString() {
          final StringBuilder builder = new StringBuilder();
          builder.append("[charset=").append(this.charset)
                  .append(", malformedInputAction=").append(this.malformedInputAction)
                  .append(", unmappableInputAction=").append(this.unmappableInputAction)
                  .append("]");
          return builder.toString();
      }
  
      public static CharCodingConfig.Builder custom() {
          return new Builder();
      }
  
      public static CharCodingConfig.Builder copy(final CharCodingConfig config) {
          Args.notNull(config, "Config");
          return new Builder()
              .setCharset(config.getCharset())
              .setMalformedInputAction(config.getMalformedInputAction())
              .setUnmappableInputAction(config.getUnmappableInputAction());
      }
  
      public static class Builder {
  
         private Charset charset;
         private CodingErrorAction malformedInputAction;
         private CodingErrorAction unmappableInputAction;
 
         Builder() {
         }
 
         public Builder setCharset(final Charset charset) {
             this.charset = charset;
             return this;
         }
 
         public Builder setMalformedInputAction(final CodingErrorAction malformedInputAction) {
             this.malformedInputAction = malformedInputAction;
             if (malformedInputAction != null && this.charset == null) {
                 this.charset = DEFAULT_CHARSET;
             }
             return this;
         }
 
         public Builder setUnmappableInputAction(final CodingErrorAction unmappableInputAction) {
             this.unmappableInputAction = unmappableInputAction;
             if (unmappableInputAction != null && this.charset == null) {
                 this.charset = DEFAULT_CHARSET;
             }
             return this;
         }
 
         public CharCodingConfig build() {
             Charset charsetCopy = charset;
             if (charsetCopy == null && (malformedInputAction != null || unmappableInputAction != null)) {
                 charsetCopy = DEFAULT_CHARSET;
             }
             return new CharCodingConfig(charsetCopy, malformedInputAction, unmappableInputAction);
         }
 
     }
 
 }