/**

  * Copyright (c) 2011-2017, jcabi.com

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions

  * are met: 1) Redistributions of source code must retain the above

  * copyright notice, this list of conditions and the following

  * disclaimer. 2) Redistributions in binary form must reproduce the above

  * copyright notice, this list of conditions and the following

  * disclaimer in the documentation and/or other materials provided

  * with the distribution. 3) Neither the name of the jcabi.com nor

  * the names of its contributors may be used to endorse or promote

  * products derived from this software without specific prior written

  * permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT

  * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL

  * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED

  * OF THE POSSIBILITY OF SUCH DAMAGE.

  */

 package com.jcabi.http.request;

 import com.jcabi.aspects.Immutable;

 import com.jcabi.aspects.Loggable;

 import com.jcabi.http.Request;

 import com.jcabi.http.RequestBody;

 import com.jcabi.http.Response;

 import com.jcabi.immutable.Array;

 import com.jcabi.log.Logger;

 import java.lang.reflect.InvocationTargetException;

 import java.nio.charset.Charset;

 import java.util.LinkedList;

 import java.util.List;

 import java.util.Map;

 import java.util.concurrent.ConcurrentHashMap;

 import java.util.concurrent.ConcurrentMap;

 import lombok.EqualsAndHashCode;

 /**

  * Default implementation of {@link com.jcabi.http.Response}.

  *

  * @author Yegor Bugayenko (yegor@tpc2.com)

  * @version $Id: 47f497fb1102283f347a4b7ccf43a0c1247665ce $

  */

 @Immutable

 @EqualsAndHashCode(of = { "req", "code", "phrase", "hdrs", "content" })

 @Loggable(Loggable.DEBUG)

 public final class DefaultResponse implements Response {

     /**

      * The Charset to use.

      */

     private static final Charset CHARSET = Charset.forName("UTF-8");

     /**

      * UTF-8 error marker.

      */

     private static final String ERR = "\uFFFD";

     /**

      * Request.

      */

     private final transient Request req;

     /**

      * Status code.

      */

     private final transient int code;

     /**

      * Reason phrase.

      */

     private final transient String phrase;

     /**

      * Headers.

      */

     private final transient Array<Map.Entry<String, String>> hdrs;

     /**

      * Content received.

      */

     @Immutable.Array

     private final transient byte[] content;

     /**

      * Public ctor.

      * @param request The request

      * @param status HTTP status

      * @param reason HTTP reason phrase

      * @param headers HTTP headers

      * @param body Body of HTTP response

      * @checkstyle ParameterNumber (5 lines)

      */

     public DefaultResponse(final Request request, final int status,

         final String reason, final Array<Map.Entry<String, String>> headers,

         final byte[] body) {

         this.req = request;

         this.code = status;

         this.phrase = reason;

         this.hdrs = headers;

         this.content = body.clone();

     }

     @Override

     public Request back() {

         return this.req;

     }

     @Override

     public int status() {

         return this.code;

     }

     @Override

     public String reason() {

         return this.phrase;

     }

     @Override

     @SuppressWarnings("PMD.AvoidInstantiatingObjectsInLoops")

     public Map<String, List<String>> headers() {

         final ConcurrentMap<String, List<String>> map =

             new ConcurrentHashMap<>(0);

         for (final Map.Entry<String, String> header : this.hdrs) {

             map.putIfAbsent(header.getKey(), new LinkedList<String>());

             map.get(header.getKey()).add(header.getValue());

         }

         return map;

     }

     @Override

     public String body() {

         final String body = new String(this.content, DefaultResponse.CHARSET);

         if (body.contains(DefaultResponse.ERR)) {

             throw new IllegalStateException(

                 Logger.format(

                     "broken Unicode text at line #%d in '%[text]s' (%d bytes)",

                     body.length() - body.replace("\n", "").length(),

                     body,

                     this.content.length

                 )

             );

         }

         return body;

     }

     @Override

     public byte[] binary() {

         return this.content.clone();

     }

     // @checkstyle MethodName (4 lines)

     @Override

     @SuppressWarnings("PMD.ShortMethodName")

     public <T extends Response> T as(final Class<T> type) {

         try {

             return type.getDeclaredConstructor(Response.class)

                 .newInstance(this);

         } catch (final InstantiationException

             | IllegalAccessException | NoSuchMethodException

             | InvocationTargetException ex) {

             throw new IllegalStateException(ex);

         }

     }

     @Override

     @SuppressWarnings("PMD.ConsecutiveLiteralAppends")

     public String toString() {

         final StringBuilder text = new StringBuilder(0)

             .append(this.code).append(' ')

             .append(this.phrase)

             .append(" [")

             .append(this.back().uri().get())

             .append("]\n");

         for (final Map.Entry<String, String> header : this.hdrs) {

             text.append(

                 Logger.format(

                     "%s: %s\n",

                     header.getKey(),

                     header.getValue()

                 )

             );

         }

         return text.append('\n')

             .append(new RequestBody.Printable(this.content))

             .toString();

     }

 }