/*
 * 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 2012-2018 the original author or authors.
 */
package org.assertj.core.error;

import org.assertj.core.data.Offset;

/**
 * Creates an error message indicating that an assertion that verifies that two numbers are not equal within a positive offset failed.
 *
 * @author Chris Arnott
 */
public class ShouldNotBeEqualWithinOffset extends BasicErrorMessageFactory {

  /**
   * Creates a new <code>{@link ShouldNotBeEqualWithinOffset}</code>.
   * @param <T> guarantees that the values used in this factory have the same type.
   * @param actual the actual value in the failed assertion.
   * @param expected the expected value in the failed assertion.
   * @param offset the given positive offset.
   * @param difference the effective difference between actual and expected.
   * @return the created {@code ErrorMessageFactory}.
   */
  public static <T extends Number> ErrorMessageFactory shouldNotBeEqual(T actual, T expected, Offset<T> offset, T difference) {
    return new ShouldNotBeEqualWithinOffset(actual, expected, offset, difference);
  }

  private <T extends Number> ShouldNotBeEqualWithinOffset(Number actual, Number expected, Offset<T> offset,
                                                          Number difference) {
    super("%nExpecting:%n" +
          "  <%s>%n" +
          "not to be close to:%n" +
          "  <%s>%n" +
          "by less than <%s> but difference was <%s>.%n" +
          "(a difference of exactly <%s> being considered " + validOrNot(offset) + ")",
          actual, expected, offset.value, difference, offset.value);
  }

  private static <T extends Number> String validOrNot(Offset<T> offset) {
    return offset.strict ? "valid" : "invalid";
  }
}
