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// Copyright 2015-2019 SWIM.AI 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
//
//     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.

package swim.http;

import swim.codec.Debug;
import swim.codec.Format;
import swim.codec.Output;
import swim.codec.Utf8;
import swim.codec.Writer;

public abstract class HttpHeader extends HttpPart implements Debug {
  public boolean isBlank() {
    return false;
  }

  public abstract String lowerCaseName();

  public abstract String name();

  public String value() {
    final Output output = Utf8.decodedString();
    writeHttpValue(output, Http.standardWriter());
    return output.bind();
  }

  @Override
  public Writer httpWriter(HttpWriter http) {
    return http.headerWriter(this);
  }

  @Override
  public Writer writeHttp(Output output, HttpWriter http) {
    return http.writeHeader(this, output);
  }

  public abstract Writer writeHttpValue(Output output, HttpWriter http);

  @Override
  public String toString() {
    return Format.debug(this);
  }

  public static HttpHeader parseHttp(String string) {
    return Http.standardParser().parseHeaderString(string);
  }
}