import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;
import java.util.Comparator;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.time.LocalDateTime;

/**
 * Phonebook extends the Hub
 * This will be the phonebook that can add, edit, display, and delete contacts.
 */
public class PhoneBook extends Hub
{

	static Scanner user = new Scanner(System.in);

	static ArrayList<String> name = new ArrayList<String>();
	// You should eliminate the parallel array lists and instead create a class called Contact or Entry
	// You can then create/manipulate an array list of Contact objects (private instance variable not a static one) instead

	public static void PhoneBookMenu() {
		/**
		 * This is the menu we can select options from.
		 */
		String menu = "1. Add a contact.\n2. Edit a contact.\n3. Display contents in alphabetical order.\n4. Terminate.";
		int selection = 0;

		do{
			/**
			 * Looping while selection is not 4
			 */
			System.out.println("Welcome to your phone book! Select an item from the following options: \n" + menu);
			selection = Integer.parseInt(user.nextLine().trim());	//Accepting user selection

			if(selection == 1)
			{
				while(true)
				{
					/**
					 * Input names and numbers to add
					 */
					System.out.print("Please enter your name and phone number or enter Done to stop: ");
					name.add(user.nextLine());
					if(name.contains("Done"))
					{
						break;
						//name.remove("Done");
						//How to remove this?
					}
				}

			}
			else if(selection == 2)
			{
				//Edit a contact
				System.out.print("Enter the name and phone number of the contact you want to change: ");
				String input = user.nextLine();
				if(name.contains(input))
				/**
				 * Edits the input by removing current one and redoing it
				 */
				{
					int index = name.indexOf(input);
					System.out.print("What would you like to change it to? ");
					String newInput = user.nextLine().trim();
					name.set(index, newInput);
				}
			}
			else if(selection == 3)
			{
				/**
				 * Displays contacts in alphabetical order
				 * Removes the "Done" statements made
				 */
				//Display contacts in Alphabetical order
				//Arrays.sort(ArrayList name)
				name.remove("Done");
				Collections.sort(name);

				for(int i = 0; i < name.size(); i++){
					System.out.println(name.get(i));
				}
			}
			else if(selection < 1 || selection > 4)
			{
				/**
				 * Gives an error message
				 * Then asks for another input
				 */
				System.out.print("Invalid selection please try again: ");
				selection = Integer.parseInt(user.nextLine().trim());
			}
			/**
			 * A 4 selection terminated this
			 */
		}while(selection != 4);
		/**
		 * Creates a new call log file
		 */
		File callLog = new File("C:\\Users\\Henry\\Desktop\\JavaFiles\\log.txt");

			 //Source : https://stackoverflow.com/questions/9961292/write-to-text-file-without-overwriting-in-java

		     PrintWriter fileOUT;
		     /**
		      * Makes a new file
		      * @catch IOException catches if a file cannot be made
		      */
			try {
				fileOUT = new PrintWriter(new FileWriter(callLog, true));
				for(String print : name){
			    	 fileOUT.println(print);
			    }
				fileOUT.close();

			} catch (IOException e)
			{

				System.out.println("File does not exist.");
			}





	}


}