package de.vivi.chess.pieces;

import de.vivi.chess.board.Board;
import de.vivi.chess.board.Field;

public class Bishop extends Piece {
    public Bishop(Color color, Type type) {
        super(color, type);
    }

    public Bishop(Color color, Type type, Field field) {
        super(color, type, field);
    }

    @Override
    public char getSymbol() {
        if (getColor() == Color.WHITE) {
            if (getType() == Type.BISHOP) {
                symbol = '\u265D';
            }

        } else if (getColor() == Color.BLACK) {
            if (getType() == Type.BISHOP) {
                symbol = '\u2657';
            }
        }
        return symbol;
    }

    @Override
    public boolean isValidMove(Board board, Field from, Field to) {
        int rowDiff = Math.abs(from.getRow() - to.getRow());
        int colDiff = Math.abs(from.getColumn() - to.getColumn());

        if (rowDiff != colDiff) {
            return false;
        }

        int rowStep = to.getRow() > from.getRow() ? 1 : -1;
        int colStep = to.getColumn() > from.getColumn() ? 1 : -1;
        int steps = rowDiff - 1;

        for (int i = 1; i <= steps; i++) {
            if (board.getPiece(Field.from(from.getColumn() + i * rowStep,
                    from.getRow() + i * colStep)) != null) {
                return false;
            }
        }

        Piece destinationPiece = board.getPiece(Field.from(to.getColumn(), to.getRow()));
        if (destinationPiece == null) {
            return true;
        } else if (destinationPiece.getColor() != this.getColor()) {
            return true;
        }

        return false;
    }
}