import bestfriendsarraylist.BestFriend;
import java.util.Arrays;
import java.util.Scanner;

public class BestFriendArrayListHelper {

    // array of bestfriends
    BestFriend[] myBFFs;
    private int count;// current count of best friends
    Scanner keyboard = new Scanner(System.in);
    String firstName;
    String lastName;
    String nickName;
    String cellPhone;
    String email;

    public BestFriendArrayListHelper() //instantiates myBFFs and count. Scanner object is created too.
    {

        myBFFs = new BestFriend[10];
        count = 0;
        keyboard = new Scanner(System.in);
        Scanner keyboard = new Scanner(System.in);

    }

    public void addAFriend() //adds friend to array
    {

        System.out.println("Enter the First Name of ur friend");

        firstName = keyboard.nextLine();

        System.out.println("Enter the Last Name of ur friend");

        lastName = keyboard.nextLine();

        System.out.println("Enter the Nick Name of ur friend");

        nickName = keyboard.nextLine();

        System.out.println("Enter the Phone no of ur friend");

        cellPhone = keyboard.nextLine();

        System.out.println("Enter the email of ur friend");

        email = keyboard.nextLine();

        BestFriend bff = new BestFriend(firstName, lastName, nickName, cellPhone, email);

        if (count == myBFFs.length) {      //array doubles if full

            expandArray();

        }

        // adding new best friend to the array, updating count of friends.
        myBFFs[count] = bff;
        count++;
        System.out.println("Friend has been successfully added!");

    }

    private void shrinkArray(int index) //method to shrink the array by removing element at given index.
    {

        // shifting remaining elements to the left
        for (int i = index; i < count - 1; i++) {

            myBFFs[i] = myBFFs[i + 1];

        }

        // decrementing count
        count--;

    }

    private void expandArray() //expands erray
    {

        BestFriend newArray[] = new BestFriend[myBFFs.length * 2];
        for (int i = 0; i < myBFFs.length; i++) //copies items from old array to new one
        {

            newArray[i] = myBFFs[i];

        }
        myBFFs = newArray;

    }

    public void displayFriend() {
        System.out.println("\ta. Display a specific friend: Type S ");
        System.out.println("\tb. Display all friends: Type all");
        String choice = keyboard.nextLine();

        if (choice.equalsIgnoreCase("all")) {

            for (int i = 0; i < count; i++) {

                System.out.println(myBFFs[i]);

            }

        } else {

            int i = searchAFriend();

            if (i == -1) {
                System.out.println("Not Found");
            } else {
                System.out.println(myBFFs[i]);
            }

        }

    }

    public int searchAFriend() {
        BestFriend searchObj = new BestFriend(firstName, lastName, nickName);
        System.out.println("\nWhat is their first name?");

        firstName = keyboard.nextLine();

        System.out.println("\nWhat is their last name?");

        lastName = keyboard.nextLine();

        System.out.println("\nWhat is their nick name?");

        nickName = keyboard.nextLine();

        for (int i = 0; i < count; i++) {

            if (myBFFs[i].equals(searchObj)) {
                return i;
            }
            else{
                System.out.println("User has not been found!");

            }
        }   return -1;
    }



    public void deleteFriend() //deletes friend from array.
    {
        String Choice;
        int i = searchAFriend();

        if (i != -1) {

            System.out.println(myBFFs[i]);

            System.out.println("Are you sure you want to remove this friend? :");

            Choice = keyboard.nextLine();

            if (Choice.equalsIgnoreCase("yes")) {

                myBFFs[i] = null;
                shrinkArray(i);
                System.out.println("Friend has been sucessfully removed");

            }

        } else {
            System.out.println("Sorry, your friend cannot be found");
        }

    }

    public void changeFriend() {


        int i = searchAFriend();

        if (i == -1) {
            System.out.println("Not Found");
        } else {

            System.out.println("\nWhat is the new first Name of your friend?");

            firstName = keyboard.nextLine();

            System.out.println("\nWhat is the new last name of your friend?");

            lastName = keyboard.nextLine();

            System.out.println("\nWhat is the new nick name of your friend?");

            nickName = keyboard.nextLine();

            System.out.println("\nWhat is the new cell phone of your friend?");

            cellPhone = keyboard.nextLine();

            System.out.println("\nWhat is the new email of your friend?");;

            email = keyboard.nextLine();

            BestFriend bff = myBFFs[i];

            bff.setCellPhone(cellPhone);

            bff.setEmail(email);

            bff.setFirstName(firstName);

            bff.setLastName(lastName);

            bff.setNickName(nickName);


        }

    }

}