/*
 * Copyright (c) 2018. Developed by Hedgecode.
 *
 * 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.hedgecode.chess.position;

import java.util.Comparator;

/**
 *
 *
 * @author Dmitry Samoshin aka gotty
 */
public enum SquareSort {

    A1H8 (
            new A1H8Comparator()
    ),

    H8A1 (
            new H8A1Comparator()
    ),

    A8H1 (
            new A8H1Comparator()
    );

    Comparator<Square> comparator;

    SquareSort(Comparator<Square> comparator) {
        this.comparator = comparator;
    }

    public Comparator<Square> comparator() {
        return comparator;
    }

    public static SquareSort defaultSort() {
        return SquareSort.A1H8;
    }


    static class A1H8Comparator implements Comparator<Square> {

        @Override
        public int compare(Square square1, Square square2) {
            return square1.getH() == square2.getH()
                    ? square1.getV() == square2.getV() ? 0
                    : square1.getV() > square2.getV() ? 1 : -1
                    : square1.getH() > square2.getH() ? 1 : -1;
        }
    }

    static class H8A1Comparator implements Comparator<Square> {

        @Override
        public int compare(Square square1, Square square2) {
            return square1.getH() == square2.getH()
                    ? square1.getV() == square2.getV() ? 0
                    : square1.getV() < square2.getV() ? 1 : -1
                    : square1.getH() < square2.getH() ? 1 : -1;
        }
    }

    static class A8H1Comparator implements Comparator<Square> {

        @Override
        public int compare(Square square1, Square square2) {
            return square1.getH() == square2.getH()
                    ? square1.getV() == square2.getV() ? 0
                    : square1.getV() > square2.getV() ? 1 : -1
                    : square1.getH() < square2.getH() ? 1 : -1;
        }
    }

}