/*
    * 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.
   */
  
  /*
   * Copyright 2015 Twitter, Inc.
   *
   * Licensed 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 java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * Utility methods for hpack tests.
   */
  public final class HpackBenchmarkUtil {
      private HpackBenchmarkUtil() {
      }
  
      /**
       * Internal key used to index a particular set of headers in the map.
       */
      private static class HeadersKey {
          final HpackHeadersSize size;
          final boolean limitToAscii;
  
          HeadersKey(HpackHeadersSize size, boolean limitToAscii) {
              this.size = size;
              this.limitToAscii = limitToAscii;
          }
  
          List<HpackHeader> newHeaders() {
              return size.newHeaders(limitToAscii);
          }
  
          @Override
          public boolean equals(Object o) {
              if (this == o) {
                  return true;
              }
              if (o == null || getClass() != o.getClass()) {
                  return false;
              }
  
              HeadersKey that = (HeadersKey) o;
  
              if (limitToAscii != that.limitToAscii) {
                  return false;
              }
              return size == that.size;
          }
  
          @Override
          public int hashCode() {
              int result = size.hashCode();
              result = 31 * result + (limitToAscii ? 1 : 0);
              return result;
          }
      }
  
      private static final Map<HeadersKey, List<HpackHeader>> headersMap;
  
      static {
          HpackHeadersSize[] sizes = HpackHeadersSize.values();
          headersMap = new HashMap<>(sizes.length * 2);
          for (HpackHeadersSize size : sizes) {
              HeadersKey key = new HeadersKey(size, true);
              headersMap.put(key, key.newHeaders());
  
              key = new HeadersKey(size, false);
              headersMap.put(key, key.newHeaders());
          }
      }
  
     /**
      * Gets headers for the given size and whether the key/values should be limited to ASCII.
      */
     static List<HpackHeader> headers(HpackHeadersSize size, boolean limitToAscii) {
         return headersMap.get(new HeadersKey(size, limitToAscii));
     }
 
     static Http2Headers http2Headers(HpackHeadersSize size, boolean limitToAscii) {
         List<HpackHeader> hpackHeaders = headersMap.get(new HeadersKey(size, limitToAscii));
         Http2Headers http2Headers = new DefaultHttp2Headers(false);
         for (int i = 0; i < hpackHeaders.size(); ++i) {
             HpackHeader hpackHeader = hpackHeaders.get(i);
             http2Headers.add(hpackHeader.name, hpackHeader.value);
         }
         return http2Headers;
     }
 }