Bag.java

import java.util.*;


public class Bag {
	private ArrayList<Tile> bag= new ArrayList<>();
	private ArrayList<Tile> discard = new ArrayList<>();
	public Bag() {
		for(int i=0;i<20; i++)
			bag.add(new Tile("blue"));
		for(int i=0;i<20; i++)
			bag.add(new Tile("black"));
		for(int i=0;i<20; i++)
			bag.add(new Tile("light blue"));
		for(int i=0;i<20; i++)
			bag.add(new Tile("red"));
		for(int i=0;i<20; i++)
			bag.add(new Tile("yellow"));
		Collections.shuffle(bag);
		
	}
	public ArrayList<Tile> getTiles() {
		ArrayList<Tile> factoryTiles = new ArrayList<>();
		for(int i=0;i<4&&!bag.isEmpty();i++) {
			factoryTiles.add(bag.remove(0));
			if(bag.isEmpty()) {
				reuseDiscardTiles();
			}
		}
		return factoryTiles;
	}
	
	public void addDiscardedTiles(ArrayList<Tile> discardTiles) {
		if(discardTiles.get(0).getColor().equals("First Tile")) {
			discardTiles.remove(0);
		}
		discard.addAll(discardTiles);
	}
	
	public void reuseDiscardTiles() {
		bag.addAll(discard);
		discard.clear();
		Collections.shuffle(bag);
	}
	
	public boolean isEmpty() {
		return bag.isEmpty() && discard.isEmpty();
	}
	public boolean bagEmpty() {
		return bag.isEmpty();
	}
	public int getBagSize() {
		return bag.size();
	}
}