public class Life implements ILife {
  
  public static void main(String[] args) {
    Life l = new Life(new String[] {  "     ",
                                      "     ",
                                      " *** ",
                                      "     ",
                                      "     " });
    l = (Life) l.nextGeneration();
  }


  public Life() {
    nukeAll();
  }

  public Life(String[] setup) {
    this();
    for (int y = 0; y < setup.length; y++)
      for (int x = 0; x < setup[y].length(); x++)
        if (setup[y].charAt(x) != ' ')
          setAlive(x, y);
  }


  @Override
  public void nukeAll() {
    // TODO Auto-generated method stub

  }

  @Override
  public void setAlive(int x, int y) {
    // TODO Auto-generated method stub

  }

  @Override
  public void setDead(int x, int y) {
    // TODO Auto-generated method stub

  }

  @Override
  public boolean isAlive(int x, int y) {
    // TODO Auto-generated method stub
    return false;
  }

  @Override
  public ILife nextGeneration() {
    Life newLife = new Life();

    for (int y = 0; y < height; y++) {
      for (int x = 0; x < width; x++) {
        int neighbors = countAliveNeighbors(x, y);

        if (isAlive(x, y)) {
          if (neighbors < 2 || neighbors > 3) {
            newLife.setDead(x, y);
          } else {
            newLife.setAlive(x, y);
          }
        }
      }
    }
    return newLife;
  }

    private int countAliveNeighbors(int x, int y) {
      int count = 0;
      for (int dy = -1; dy <= 1; dy++) {
        for (int dx = -1; dx <= 1; dx++) {
          if (dx == 0 && dy == 0) continue; // Eigene Zelle ignorieren
          if (isAlive(x + dx, y + dy)) count++;
        }
      }
      return count;
    }
  }