/*
 * 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.
 */

package org.apache.gravitino.client;

import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Base64;
import org.apache.gravitino.auth.AuthConstants;

/** Provides HTTP Basic credentials for Gravitino built-in IdP authentication. */
final class BasicTokenProvider implements AuthDataProvider {

  private final byte[] token;

  BasicTokenProvider(String username, String password) {
    this.token = buildToken(username, password);
  }

  private static byte[] buildToken(String username, String password) {
    String userInformation = username + ":" + password;
    return (AuthConstants.AUTHORIZATION_BASIC_HEADER
            + new String(
                Base64.getEncoder().encode(userInformation.getBytes(StandardCharsets.UTF_8)),
                StandardCharsets.UTF_8))
        .getBytes(StandardCharsets.UTF_8);
  }

  @Override
  public boolean hasTokenData() {
    return true;
  }

  @Override
  public byte[] getTokenData() {
    return token;
  }

  @Override
  public void close() throws IOException {}
}
