import java.io.*;
import java.util.*;

class PhoneBook {
    /**
     * Add a new person to the phone book.
     * The names are required to be added in alphabetical order.
     *
     * @throws InvalidArgumentException if the name comes in the
     *         wrong order.
     */
    public void add(Person person) {
        // TODO
    }

    /**
     * How many people are in the phone book?
     */
    public int size() {
        // TODO
        return 0;
    }

    /**
     * Look up a person in the phone book.
     *
     * @param name The person's name.
     * @return The person, or null if the person is not in the phone
     *          book.
     */
    public Person find(String name) {
        // TODO
        return null;
    }
}

class Person {
    /** The person's name. */
    final public String name;
    /** The person's phone number. */
    final public String phone;

    public Person(String name, String phone) {
        this.name = name;
        this.phone = phone;
    }

    public String toString() {
        return "(" + name + "," + phone + ")";
    }
}

public class Lab1 {
    public static void main(String[] args) {
        if (args.length != 1) {
            System.err.println("Please give the phone book file as a parameter");
            System.exit(1);
        }
        
        try {
            PhoneBook phoneBook = new PhoneBook();
            BufferedReader names = new BufferedReader(new FileReader(args[0]));
            String line;

            System.out.println("Reading phone book...");
            while((line = names.readLine()) != null) {
                int index = line.indexOf("/");
                String name = line.substring(0, index);
                String number = line.substring(index+1);
                phoneBook.add(new Person(name, number));
            }
            names.close();

            System.out.println("Finished reading phone book.");
            System.out.println(phoneBook.size() + " entries.");

            System.out.println("Type in a name, or 'quit' to quit.");
            BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
            while(true) {
                System.out.print("> ");
                System.out.flush();
                line = in.readLine();
                if (line == null || line.equals("quit"))
                    break;

                Person person = phoneBook.find(line);
                if (person == null)
                    System.out.println("Person not found.");
                else
                    System.out.println("Phone number: " + person.phone);
            }
        } catch (IOException e) {
            System.err.println(e);
        }
    }
}