package de.vivi.chess.pieces;

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

public class Pawn extends Piece {

    public Pawn(Color color, Type type) {
        super(color, type);
    }

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

    @Override
    public char getSymbol() {
        if (getColor() == Color.WHITE) {
            if (getType() == Type.PAWN) {
                symbol = '\u265F';
            }

        } else if (getColor() == Color.BLACK) {
            if (getType() == Type.PAWN) {
                symbol = '\u2659';
            }
        }
        return symbol;
    }

    @Override
    public boolean isValidMove(Board board, Field from, Field to) {
       int forwardDirection = getColor() == Color.WHITE ? -1 : 1;
        System.out.println("forwardDirection " + forwardDirection);
        System.out.println("to.getRow() " + to.getRow());
        System.out.println("from.getRow() " + from.getRow());
       int rowDiff = (to.getRow() - from.getRow()) * forwardDirection;
        System.out.println("rowDiff " + rowDiff);
       int colDiff = to.getColumn() - from.getColumn();
        System.out.println("colDiff " + colDiff);
        System.out.println("black pawn links " + board.getPiece(0,1));

       if (colDiff == 0 && rowDiff == 1 && board.getPiece(to) == null) {
           return true;
       }

       boolean isStartingField = (getColor() == Color.WHITE && from.getRow() == 6) ||
               (getColor() == Color.BLACK && from.getRow() == 1);
        System.out.println("getColor() " + getColor());
        System.out.println("from.getRow() " + from.getRow());
        System.out.println("isStartingField " + isStartingField);
        System.out.println("board.getPiece(to) " + board.getPiece(to));
       if (colDiff == 0 && rowDiff == 2 && isStartingField &&
               board.getPiece(to) == null) {
           int middleRow = from.getRow() + forwardDirection;
           System.out.println("from.getRow() " +from.getRow());
           System.out.println("middleRow " + middleRow);
           System.out.println("from.getColumn() " + from.getColumn());

           if (board.getPiece(Field.from(from.getColumn(), middleRow)) == null) {
               return true;
           }
       }

       if (Math.abs(colDiff) == 1 && rowDiff == 1 &&
               board.getPiece(to) != null &&
               board.getPiece(to).getColor() != this.getColor()) {
           return true;
        }

        return false;
    }
}