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/*
 * Copyright 2023 the original author or authors.
 *
 * 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.seppiko.commons.utils.crypto;

import java.util.zip.CRC32C;
import org.seppiko.commons.utils.MathUtil;
import org.seppiko.commons.utils.codec.HexUtil;

/**
 * CRC Util
 *
 * @author Leonard Woo
 */
public class CRCUtil {

  private CRCUtil() {}

  /** CRC16/MAXIM */
  public static class CRC16M {

    private static final CRC16MAXIM crc16MAXIM;

    static {
      crc16MAXIM = new CRC16MAXIM();
    }

    /**
     * encoding
     *
     * @param data raw data
     * @return Hash code
     */
    public static long encode(byte[] data) {
      crc16MAXIM.update(data);
      return crc16MAXIM.getValue();
    }

    /**
     * encoding with string
     *
     * @param data raw data
     * @return Hash HEX string
     */
    public static String encodeString(byte[] data) {
      long crc16 = encode(data);
      return MathUtil.convertDecimalTo(crc16, HexUtil.HEXADECIMAL);
    }
  }

  /** CRC24-C */
  public static class CRC24C {

    private static final CRC24 crc24;

    static {
      crc24 = new CRC24();
    }

    /**
     * encoding
     *
     * @param data raw data
     * @return Hash code
     */
    public static long encode(byte[] data) {
      crc24.update(data);
      return crc24.getValue();
    }

    /**
     * encoding with string
     *
     * @param data raw data
     * @return Hash HEX string
     */
    public static String encodeString(byte[] data) {
      long crc24 = encode(data);
      return MathUtil.convertDecimalTo(crc24, HexUtil.HEXADECIMAL);
    }
  }

  /** CRC32-C */
  public static class CRC32 {

    private static final CRC32C crc32;

    static {
      crc32 = new CRC32C();
    }

    /**
     * encoding
     *
     * @param data raw data
     * @return Hash code
     */
    public static long encode(byte[] data) {
      crc32.update(data);
      return crc32.getValue();
    }

    /**
     * encoding with string
     *
     * @param data raw data
     * @return Hash HEX string
     */
    public static String encodeString(byte[] data) {
      long crc32 = encode(data);
      return MathUtil.convertDecimalTo(crc32, HexUtil.HEXADECIMAL);
    }
  }

  /** CRC64/ECMA182 */
  public static class CRC64E {

    private static final CRC64ECMA182 crc64e;

    static {
      crc64e = new CRC64ECMA182();
    }

    /**
     * encoding
     *
     * @param data raw data
     * @return Hash code
     */
    public static long encode(byte[] data) {
      crc64e.update(data);
      return crc64e.getValue();
    }

    /**
     * encoding with string
     *
     * @param data raw data
     * @return Hash HEX string
     */
    public static String encodeString(byte[] data) {
      long crc64 = encode(data);
      return MathUtil.convertDecimalTo(crc64, HexUtil.HEXADECIMAL);
    }
  }
}