/*
 * Copyright (c) 2018-2020. 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.pgn.entity;

import java.util.ArrayList;
import java.util.List;

/**
 * Variation
 *
 * @author Dmitry Samoshin aka gotty
 */
public class Variation implements Moves {

    private final DetailMove NULL_MOVE = new DetailMove(0, null);

    private DetailMove currentMove;
    private final List<DetailMove> moves = new ArrayList<>();

    public Variation() {
        currentMove = NULL_MOVE;
    }

    @Override
    public void addMove(DetailMove move) {
        moves.add(move);
        currentMove = move;
    }

    @Override
    public List<DetailMove> getMoves() {
        return moves;
    }

    @Override
    public DetailMove nullMove() {
        return NULL_MOVE;
    }

    @Override
    public DetailMove currentMove() {
        return currentMove;
    }

}