/*
 * Copyright 2025 Hirokazu Kobayashi
 *
 * 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 org.idp.server.core.openid.oauth.type.pkce;

import java.util.Objects;

public enum CodeChallengeMethod {
  plain,
  S256,
  unknown,
  undefined;

  public static CodeChallengeMethod of(String value) {
    if (Objects.isNull(value) || value.isEmpty()) {
      return undefined;
    }
    for (CodeChallengeMethod codeChallengeMethod : CodeChallengeMethod.values()) {
      if (codeChallengeMethod.name().equals(value)) {
        return codeChallengeMethod;
      }
    }
    return unknown;
  }

  public boolean isS256() {
    return this == S256;
  }

  public boolean isDefined() {
    return this != undefined;
  }
}