import acm.graphics.*;
import acm.program.*;
import acm.util.*;
import java.util.*;
import java.io.*;

public class PhoneBook extends ConsoleProgram {
	
	public void run() {
		setFont("Courier-24");
		
		// This hash map stores the data of my program
		HashMap<String, Integer> phoneBook = 
				new HashMap<String, Integer>();
		
		// Prefill the database with a few key/value pairs
		phoneBook.put("Chris", 8666586);
		phoneBook.put("Waddie", 6701679);
		phoneBook.put("Jenny", 8675309);
		phoneBook.put("Julia", 1238888);
		phoneBook.put("Brahm", 2345678);
		
		// Run a loop which allows the user to interact with
		// the database
		runCommandLoop(phoneBook);
		
	}

	// Allows the user to printAll, add, or lookup numbers
	private void runCommandLoop(HashMap<String, Integer> phoneBook) {
		while(true) {
			// Get the command from the user
			String cmd = readLine("Enter command (printAll, add, lookup): ");
			
			// Process the command
			if(cmd.equals("printAll")) {
				printMap(phoneBook);
			} else if(cmd.equals("add")){
				addToMap(phoneBook);
			} else if(cmd.equals("lookup")){
				lookup(phoneBook);
			} else {
				println("Unknown command: " + cmd);
			}
			
			// Add an empty line between commands
			println("");
		}
	}

	// Ask the user for the name, and look up the corresponding phone #
	private void lookup(HashMap<String, Integer> phoneBook) {
		// get a key from the user
		String key = readLine("Key: ");
		
		// if the key is in the map, look it up
		if(!phoneBook.containsKey(key)) {
			println("Sorry but there is no number for " + key);
		} else {
			// does a normal lookup into the phoneook
			int phoneNumber = phoneBook.get(key);
			println(key + ": " + phoneNumber);
		}
	}

	// Adds a new key/value pair to the hashmap
	private void addToMap(HashMap<String, Integer> phoneBook) {
		// get a key and a value from the user
		String key = readLine("Key: ");
		int phoneNumber = readInt("Phone number: " );
		
		// add the key/value to the map
		phoneBook.put(key, phoneNumber);
		println("Added " + key);
	}

	// Print out all key value pairs
	private void printMap(HashMap<String, Integer> phoneBook) {
		// get keys one at a time
		for(String key : phoneBook.keySet()) {
			// TODO: fill this in
			
			// 1. Get the value associate with the current key
			int value = phoneBook.get(key);
			
			// 2. Print out the key value pair!!!!??!!!@#$
			println(key + " is " + value);
			
			// At this point you have access to a variale called key
			// key is going to take on each value in the phoneBook one
			// at a time. So for example the first time key = "Brahm".
			// The second time, key = "Chris"... etc
		}
		
		
	}
	
	
}