package encapsulation;

import java.util.ArrayList;
import java.util.List;

public class Nim {
    private List<Integer> size = new ArrayList<Integer>();

    Nim(int pileSize) {
        size.add(pileSize);
        size.add(pileSize);
        size.add(pileSize);
    }

    Nim() {
        size.add(10);
        size.add(10);
        size.add(10);
    }

    void removePieces(int number, int targetPile) {
        //check that we use a valid target pile 0, 1, 2.
        if (targetPile >= 0 && targetPile < 3) {
        }
        else {
            throw new IllegalArgumentException("targetpile isnt between 0 and 2");
        }

        //cant remover less than 1 piece
        if (number < 1) {
            throw new IllegalArgumentException("number cant be less than 1");
        }

        //check if game is over
        if (isGameOver() == true) {
            throw new IllegalStateException("game is over");
        }

        //remove pieces if valid move
        if (isValidMove(number, targetPile) == true) {
            System.out.println("REMOVE BEFORE: number: " + number + " targetpile: " + targetPile + " pilesize: " + size.get(targetPile) + " " + ((size.get(targetPile) - number) >= 0));
            size.set(targetPile, size.get(targetPile) - number);
            System.out.println("REMOVE AFTER: number: " + number + " targetpile: " + targetPile + " pilesize: " + size.get(targetPile) + " " + ((size.get(targetPile) - number) == 0));

        }
        else {
            throw new IllegalArgumentException("cant remove more pieces than the object has");
        }
    }

    boolean isValidMove(int number, int targetPile) {

        System.out.println("number: " + number + " targetpile: " + targetPile + " pilesize: " + size.get(targetPile) + " " + ((size.get(targetPile) - number) >= 0));

        //test if valid move.
        if (number < 1) {
            return false;
        }
        if ((size.get(targetPile) - number) >= 0) {

            return true;
        }
        else {
            return false;
        }
    }

    boolean isGameOver() {
        if (size.get(0) == 0 || size.get(1) == 0 || size.get(2) == 0) {
            return true;
        }
        else {
            return false;
        }
    }

    int getPile(int targetPile) {
        return size.get(targetPile);
    }

    public String toString() {
        return "";
    }
}