/*  __    __  __  __    __  ___
 * \  \  /  /    \  \  /  /  __/
 *  \  \/  /  /\  \  \/  /  /
 *   \____/__/  \__\____/__/
 *
 * Copyright 2014-2017 Vavr, http://vavr.io
 *
 * 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 ch.usi.inf.sdm.sdm04;

import ch.usi.si.codelounge.jsicko.Contract;

import java.util.stream.StreamSupport;

@SuppressWarnings("unused") // methods used by jSicko
public interface CharRangeContracts extends Contract {

    @Pure
    char getStart();

    @Pure
    char getEnd();

    @Pure
    boolean isNegated();

    @Pure
    boolean contains(final char ch);

    @Pure
    default boolean char_range_is_not_null(final CharRange range) {
        return range != null;
    }

    @Pure
    default boolean contains_uses_start_end_range(final boolean returns, final char ch) {
        return returns == (this.isNegated() != (this.getStart() <= ch && this.getEnd() >= ch));
    }

    @Pure
    default boolean characters_in_param_are_in_this(final boolean returns, final CharRange range) {
        return returns == StreamSupport.stream(range.spliterator(), false).allMatch(this::contains);
    }
}