/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * 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 com.linkedin.pinot.core.query.aggregation.function.customobject;

import com.linkedin.pinot.core.segment.creator.impl.V1Constants;
import java.nio.ByteBuffer;
import javax.annotation.Nonnull;


public class MinMaxRangePair implements Comparable<MinMaxRangePair> {
  private double _min;
  private double _max;

  public MinMaxRangePair(double min, double max) {
    _min = min;
    _max = max;
  }

  public void apply(double min, double max) {
    if (min < _min) {
      _min = min;
    }
    if (max > _max) {
      _max = max;
    }
  }

  public void apply(@Nonnull MinMaxRangePair minMaxRangePair) {
    if (minMaxRangePair._min < _min) {
      _min = minMaxRangePair._min;
    }
    if (minMaxRangePair._max > _max) {
      _max = minMaxRangePair._max;
    }
  }

  public double getMin() {
    return _min;
  }

  public double getMax() {
    return _max;
  }

  @Nonnull
  public byte[] toBytes() {
    ByteBuffer byteBuffer = ByteBuffer.allocate(V1Constants.Numbers.DOUBLE_SIZE + V1Constants.Numbers.DOUBLE_SIZE);
    byteBuffer.putDouble(_min);
    byteBuffer.putDouble(_max);
    return byteBuffer.array();
  }

  @Nonnull
  public static MinMaxRangePair fromBytes(byte[] bytes) {
    ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
    return new MinMaxRangePair(byteBuffer.getDouble(), byteBuffer.getDouble());
  }

  @Override
  public int compareTo(@Nonnull MinMaxRangePair minMaxRangePair) {
    double minMaxRange1 = _max - _min;
    double minMaxRange2 = minMaxRangePair._max - minMaxRangePair._min;
    if (minMaxRange1 > minMaxRange2) {
      return 1;
    }
    if (minMaxRange1 < minMaxRange2) {
      return -1;
    }
    return 0;
  }
}