/** Halloween.java -- Here's one application that can make use of a bag.
 *  Let's go trick-or-treating (collect candy names from an input file),
 *  and eat (print) 3 at random.
 */
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Halloween
{
  public static void main(String [] args) throws FileNotFoundException
  {
    Scanner inFile = new Scanner(new FileInputStream("candy.txt"));
    BagArrayList bag = new BagArrayList();

    // read the input file to intialize the bag
    while (inFile.hasNextLine())
    {
      String name = inFile.nextLine();
      if (name == null)
        break;	
      bag.add(new Item(name));
    }

    // Now eat 3 at random.  We call the remove() function with no parameter,
    // which means it's the one that selects one object at random.
    for (int i = 0; i < 3; ++i)
    {
      Item candy = bag.remove();
      System.out.println("Eating a(n) " + candy);
    }

    // Now let's test some other bag methods.
    System.out.println("Bag size is now " + bag.size());
    System.out.println("Contents of bag:\n" + bag);

    // If we haven't done so already, eat the apple.
    Item apple = bag.remove(new Item("apple"));
    if (apple == null)
      System.out.println("No apple left to eat.");
    else
      System.out.println("Eating apple.");

    System.out.println("Now the bag contains\n" + bag);
  }
}