import java.util.ArrayList;

public class Truck {

    private ArrayList<Item> contents;
    
    Truck() {
        contents = new ArrayList<Item>();
    }

    public int getLoadWeight() {
        int weight = 0;
        for (Item i : contents) {
            weight += i.getWeight();
        }
        return weight;
    }

    private void load() {
        Box b1 = new Box("cardboard");
        Box b2 = new Box("plastic");
        Box b3 = new Box("cardboard");
        Box b4 = new Box("wooden");

        Gizmo book = new Gizmo("Book", false, 2);
        Gizmo cabbage = new Gizmo("Cabbage", true, 1);
        Gizmo yogurt = new Gizmo("Yogurt", true, 1);
        Gizmo chinaSet = new Gizmo("China set", 40);
        Gizmo bowlingBall = new Gizmo("Bowling ball", 16);
        Gizmo rockCollection = new Gizmo("Rock collection", false, 800);

        for (int i=0; i<10; i++) {
            b1.pack(book);
        }
        b3.pack(chinaSet);
        b3.pack(yogurt);
        b2.pack(bowlingBall);
        b2.pack(b3);
        b4.pack(b2);
        b4.pack(rockCollection);

        load(b1);
        load(b2);
        load(b3);
        load(b4);
    }

    void load(Box b) {
        contents.add(b);
    }

    public static void main(String args[]) {
        Truck uhaul = new Truck();
        System.out.println("It's moving day!");
        uhaul.load();

        for (Item i : uhaul.contents) {
            System.out.println(i);
        }

        System.out.println("We're hauling " + uhaul.getLoadWeight() + " lbs");
    }
}