//Bearbeitet von: David Papac
import java.util.Arrays;
public class Life implements ILife {

  String[] gameWorld;

  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
    gameWorld = new String[]{"     ",
            "     ",
            "     ",
            "     ",
            "     "};

  }

  @Override
  public void setAlive(int x, int y) {
    // TODO Auto-generated method stub
    String newString ="";
    for(int i=0; i< gameWorld[y].length(); i++){
      if(i==x)
        newString +='*';
      else
        newString += gameWorld[y].charAt(i);

    }
    gameWorld[y]=newString;
  }

  @Override
  public void setDead(int x, int y) {
    // TODO Auto-generated method stub
    String newString ="";
    for(int i=0; i< gameWorld[y].length(); i++){
      if(i==x)
        newString +=' ';
      else
        newString += gameWorld[y].charAt(i);

    }
    gameWorld[y]=newString;
  }

  @Override
  public boolean isAlive(int x, int y) {
    // TODO Auto-generated method stub
    if(gameWorld[y].charAt(x) =='*'){
      return true;}
    else{
      return false;
    }}

  @Override
  public ILife nextGeneration() {
    // TODO Auto-generated method stub
    Life newWorld = new Life();
    for(int y=0; y< gameWorld.length;y++){
      for(int x= 0; x <gameWorld[y].length(); x++){
        int neighbor = countNeighbor(x, y);
        if(isAlive(x,y)) {
          if (neighbor == 3 || neighbor == 2) {
            newWorld.setAlive(x, y);
          }
          if (neighbor < 2 || neighbor > 3) {
            newWorld.setDead(x, y);
          }
        }
        if(!isAlive(x,y)) {
          if (neighbor == 3) {
            newWorld.setAlive(x, y);
          } else {
            newWorld.setDead(x, y);
          }
        }
      }
    }
    newWorld.showBoard();
    return newWorld;
  }

  public int countNeighbor(int x, int y) {
    int counter=0;
    //counts top row
    if(y-1 >=0){
      for(int i =x-1; i<= x+1;i++){
        if(i>=0 && i< gameWorld[y-1].length()){
          if(isAlive(i,y-1)){
            counter++;
          }
        }
      }
    }
    //counts bottom row
    if(y+1 <gameWorld.length){
      for(int i =x-1; i<= x+1;i++){
        if(i>=0 && i< gameWorld[y+1].length()){
          if(isAlive(i,y+1)){
            counter++;
          }
        }
      }
    }
    //counts sides
    if(x-1>=0){
      if(isAlive(x-1,y)){
        counter++;
      }
    }
    if( x+1< gameWorld[y].length()){
      if(isAlive(x+1,y)){
        counter++;
      }
    }
    return counter;
  }

  public void showBoard() {
    for (int i = 0; i < gameWorld.length; i++)
      System.out.println(Arrays.toString(new String[]{gameWorld[i]}));
  }
}