package com.domain;

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

public class WhiteKing extends GamePiece {

    public WhiteKing(GameBoard aBoard, Coordinate aTile) {
        super(PieceType.WHITE_KING, aTile, aBoard);
    }

    @Override
    public List<Coordinate> candidateMoves() {
        List<Coordinate> candidates = new ArrayList<Coordinate>();

        candidates = calculateStraightMoves(candidates);
        candidates = calculateDiagonalMoves(candidates);

        return candidates;
    }

    private List<Coordinate> calculateStraightMoves(List<Coordinate> aCandidates) {
        aCandidates.add(super.position().oneSpaceForward());
        aCandidates.add(super.position().oneSpaceBackward());
        aCandidates.add(super.position().oneSpaceLeft());
        aCandidates.add(super.position().oneSpaceRight());

        return aCandidates;
    }

    private List<Coordinate> calculateDiagonalMoves(List<Coordinate> aCandidates) {
        aCandidates.add(super.position().oneSpaceForwardLeft());
        aCandidates.add(super.position().oneSpaceForwardRight());
        aCandidates.add(super.position().oneSpaceBackwardLeft());
        aCandidates.add(super.position().oneSpaceBackwardRight());

        return aCandidates;
    }

    @Override
    protected GamePiece constructNewPieceToMove(Coordinate aNewLocation) {
        return new WhiteKing(board, aNewLocation);
    }

}