package kata.gameoflife.a20170806;

import java.util.Arrays;
import java.util.List;

/**
  * Game of Life Kata.
  * Copyright (c) 2017, Peter Kofler, licensed under BSD License.
  */
public class LocateNeighbourCells {

    private final LocateCell locateCenterCell;

    public LocateNeighbourCells(LocateCell locateCenterCell) {
        this.locateCenterCell = locateCenterCell;
    }

    public List<LocateCell> locateNeighbourCells() {
        return Arrays.asList(//
                new LocateCell(locateCenterCell.x - 1, locateCenterCell.y - 1), //
                new LocateCell(locateCenterCell.x - 1, locateCenterCell.y), //
                new LocateCell(locateCenterCell.x - 1, locateCenterCell.y + 1), //
                new LocateCell(locateCenterCell.x,     locateCenterCell.y - 1), //
                new LocateCell(locateCenterCell.x,     locateCenterCell.y + 1), //
                new LocateCell(locateCenterCell.x + 1, locateCenterCell.y - 1), //
                new LocateCell(locateCenterCell.x + 1, locateCenterCell.y), //
                new LocateCell(locateCenterCell.x + 1, locateCenterCell.y + 1)//
        );
    }

    // now I split it from locate. OK, but I have to expose x and y,
    // break encapsulation and expose internals. Sad.
}