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/**
 * 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.
 *
 * Copyright 2012-2016 the original author or authors.
 */
package com.fitbur.assertj.api;

import static java.lang.Math.abs;

import java.util.Comparator;

public class ComparatorFactory {

  public static final ComparatorFactory INSTANCE = new ComparatorFactory();

  public Comparator doubleComparatorWithPrecision(final double precision) {
    Comparator closeToComparator = new Comparator() {
      @Override
      public int compare(Double o1, Double o2) {
        if (abs(o1.doubleValue() - o2.doubleValue()) < precision) return 0;
        return o1.doubleValue() - o2.doubleValue() > 0 ? 1 : -1;
      }

      @Override
      public String toString() {
        return "double comparator at precision " + precision;
      }
    };
    return closeToComparator;
  }

  public Comparator floatComparatorWithPrecision(final float precision) {
    Comparator closeToComparator = new Comparator() {
      @Override
      public int compare(Float o1, Float o2) {
        if(abs(o1.floatValue() - o2.floatValue()) < precision) return 0;
          return o1.floatValue() - o2.floatValue() > 0 ? 1 : -1;
      }

      @Override
      public String toString() {
        return "float comparator at precision " + precision;
      }
    };
    return closeToComparator;
  }
}