// Arup Guha
// Originally created for CS 302, Spring 1999 semester at UW.
// Slightly edited for COP 3330, Spring 2006 semester at UCF to be 
// compatible with java 5.0

import java.io.*;
import java.util.*;
public class AddressBook {

    private Contact[] friends; // An array of Contacts - each stores info for one friend
    private int numfriends; // Number of friends currently in AddressBook

    // Create an empty AddressBook
    public AddressBook() {
		friends = new Contact[10];
		numfriends = 0;
    }

    // Add a contact that's passed in as a parameter.
    public void addContact(Contact c) throws FullAddressBookException {

		// Oops!
        if (numfriends >= 10)
			throw new FullAddressBookException("Friend Quota Reached!");

		// If we get here we're good to add.
		friends[numfriends] = c;
		numfriends++;
    }

    // Print out info on all contacts using method Contact class.
    public void printContacts() {
		for (int i=0;i<numfriends;i++)
			System.out.println(friends[i]);
    }

    // Returns the number of friends currently in AddressBook
    public int numContacts() {
		return numfriends;
    }

    // Returns a non-neg integer if a Contact with name s exists corresponding
    // to which place in the array friends the Contact is stored. Returns -1
    // otherwise.
    private int haveContact(String s) {
		for (int i=0;i<numfriends;i++)
			if (friends[i].getName().equals(s))
				return i;
		return -1;
    }

    // Deletes a contact with name s, if one is in the AddressBook.
    public void deleteContact(String s) {
		int place = haveContact(s);
		if (place >= 0) {
			friends[place] = friends[numfriends-1];
			numfriends--;
		}
    }

	// main method reporting the Exception that might be thrown.
    public static void main(String[] args) throws FullAddressBookException {

        Scanner stdin = new Scanner(System.in);

		// Instantiate AddressBook object
		AddressBook blackbook = new AddressBook();

		// Menu driven loop.
		menu();
		int choice = stdin.nextInt();
		
		while (choice!=5) {
		
		// Only adds contact if there is room in AddressBook blackbook.
			if (choice == 1) {

				//Reads in all appropriate information.");
				System.out.println("Enter your friend\'s name:");
				String name = stdin.next();
				System.out.println("Enter their age.");
				int age = stdin.nextInt();
				System.out.println("Enter their phone number.");
				int number = stdin.nextInt();
				System.out.println("Enter the birthday, month space day.");
				int mon = stdin.nextInt();
				int day = stdin.nextInt();

				// Uses information to create Contact object, which is
				// a parameter to the addContact method.
				blackbook.addContact(new Contact(name,age,number,mon,day));
			}
			
			// Implements rest of the choices by calling appropriate AddressBook methods on blackbook.
			else if (choice == 2) {
				System.out.println("What is the name of the contact you want to delete?");
				String name = stdin.next();
				blackbook.deleteContact(name);
			}
			else if (choice == 3) {
				System.out.println("You have " + blackbook.numContacts() + " contacts.");
			}
			else if (choice == 4) {
				blackbook.printContacts();
			}
			else if (choice !=5) {
				System.out.println("Sorry, that was an invalid menu choice, try again.");
			}
			
			// Get next choice.
			menu();
			choice = stdin.nextInt();
		}
    }

    public static void menu() {
		System.out.println("1.Add a new contact to your address book.");
		System.out.println("2.Delete a contact from your address book.");
		System.out.println("3.Print out the number of contacts you have.");
		System.out.println("4.Print out information of all of your contacts.");
		System.out.println("5.Quit.");
		System.out.println("Enter your menu choice:");
    }
}