/*
 * 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.parquet.crypto;

import org.apache.parquet.format.BlockCipher;

public class ModuleCipherFactory {

  // Parquet Module types
  public enum ModuleType {
    Footer((byte) 0),
    ColumnMetaData((byte) 1),
    DataPage((byte) 2),
    DictionaryPage((byte) 3),
    DataPageHeader((byte) 4),
    DictionaryPageHeader((byte) 5),
    ColumnIndex((byte) 6),
    OffsetIndex((byte) 7),
    BloomFilterHeader((byte) 8),
    BloomFilterBitset((byte) 9);

    private final byte value;

    private ModuleType(byte value) {
      this.value = value;
    }

    public byte getValue() {
      return value;
    }
  }

  public static final int SIZE_LENGTH = 4;

  public static BlockCipher.Encryptor getEncryptor(AesMode mode, byte[] keyBytes) {
    switch (mode) {
      case GCM:
        return new AesGcmEncryptor(keyBytes);
      case CTR:
        return new AesCtrEncryptor(keyBytes);
      default:
        throw new IllegalArgumentException("AesMode not supported in ModuleCipherFactory: " + mode);
    }
  }

  public static BlockCipher.Decryptor getDecryptor(AesMode mode, byte[] keyBytes) {
    switch (mode) {
      case GCM:
        return new AesGcmDecryptor(keyBytes);
      case CTR:
        return new AesCtrDecryptor(keyBytes);
      default:
        throw new IllegalArgumentException("AesMode not supported in ModuleCipherFactory: " + mode);
    }
  }
}
