import 'dart:math';

class CellPosition {
  final int column;
  final int row;
  const CellPosition(this.column, this.row);

  double distance(CellPosition to) {
    return sqrt(pow(to.column - column, 2) + pow(to.row - row, 2));
  }

  CellPosition decreaseBy(int diff) {
    int newCol =
        column < 0 ? column + diff * diff.sign : column - diff * diff.sign;
    int newRow = row < 0 ? row + diff * diff.sign : row - diff * diff.sign;

    return CellPosition(newCol, newRow);
  }

  @override
  int get hashCode => "${column}:${row}".hashCode;

  bool operator ==(Object pos) {
    return pos is CellPosition && this.column == pos.column && this.row == pos.row;
  }

  CellPosition operator -(CellPosition pos) {
    return CellPosition(column - pos.column, row - pos.row);
  }

  CellPosition operator +(CellPosition pos) {
    return CellPosition(column + pos.column, row + pos.row);
  }

  @override
  String toString() {
    return "Position(${column}x${row})";
  }

  toJSON() {
    return {
      "type": "BoardCell",
      "column": column,
      "row": row,
    };
  }
}