import java.util.Scanner;

import java.util.Random;

import java.time.LocalDate;

import java.time.Month;

public class ATM {

// Initialize library data

static Random random = new Random();

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

// Initialize class data

static Bank myBank = new Bank("BCA");

// Initialize index value to locate an element in the list

static int index = -1;

// Initialize boolean values to loop through and traverse between menus

static boolean inServiceMenu = true;

static boolean inTellerMenu = false;

static boolean inATMMenu = false;

// Initialize functions to loop through and traverse between menus

private static void disableService(){

inServiceMenu = false;

}

private static void enableService(){

inServiceMenu=true;

}

private static void enableTeller(){

disableService();

inTellerMenu = true;

}

private static void disableTeller(){

inTellerMenu = false; enableService();

}

private static void enableATM(){

disableService();

inATMMenu = true;

}

private static void disableATM(){

inATMMenu = false; enableService();

}

private static int RunSearch(){

// Users input information of debit card for parameter input on search function

System.out.print("Enter card number: ");

long sn = myObj.nextLong();

System.out.print("Enter expiration date(mm/yy): ");

String ed = myObj.next();

System.out.print("Enter CVV: ");

int cvv = myObj.nextInt();

System.out.print("Enter 6-digit PIN: ");

String pinStr = myObj.next();

int pinInt = Integer.parseInt(pinStr);

int index = myBank.searchCustomer(sn,ed,cvv,pinInt); //set the value of index to the return value of element's index that meets the criteria

return index;

}

private static String RandomNumbers(int digits){

String result = ""; //Declare end-result to be empty

int rng = 0; //Declare random number container to be zero

// CVV Number

if (digits < 5){

for(int i=0; i< digits;i++){ //For each digit,

rng=random.nextInt(9); //Set the value of random number to be from 0-9

result += Integer.toString(rng); //Add the random number to the string

}

}

// Account Number & Card Number

else if(digits>=10){

for(int i=0; i< digits;i++){ //For each digit,

if(i==0){rng = random.nextInt(8)+1;} //The first digit will at least be 1

else{rng=random.nextInt(9);} //The second digit and so on will be from 0-9

result += Integer.toString(rng); //Add the random number to the string

}

}

return result;

}

private static String GetExpirationMonth(String month){

// Change the string's value from word to number form

if(month=="JANUARY"){month="01";}

else if(month=="FEBRUARY"){month="02";}

else if(month=="MARCH"){month="03";}

else if(month=="APRIL"){month="04";}

else if(month=="MAY"){month="05";}

else if(month=="JUNE"){month="06";}

else if(month=="JULY"){month="07";}

else if(month=="AUGUST"){month="08";}

else if(month=="SEPTEMBER"){month="09";}

else if(month=="OCTOBER"){month="10";}

else if(month=="NOVEMBER"){month="11";}

else if(month=="DECEMBER"){month="12";}

return month;

}

private static String GetExpirationYear(int year){

String newYear = Integer.toString(year); //Change from int to string format

newYear = newYear.substring(2); //Remove first two digits

return newYear;

}

private static String GetExpirationDate(){

String expirationDate= "";

LocalDate currentdate = LocalDate.now();

//Getting the current month

String currentMonth = String.valueOf(currentdate.getMonth());

//getting the current year

int currentYear = currentdate.getYear();

// Convert to new string format

String newMonth = GetExpirationMonth(currentMonth);

String newYear = GetExpirationYear(currentYear);

// Convert to string format and return the formatted value

expirationDate = newMonth+"/"+newYear;

return expirationDate;

}

private static void QuitApp(){

System.exit(0); //Terminate the program

}

private static void CreateAccount(){

index = myBank.getNumberOfCustomers(); //The new index value on the list should be the current number of customers

// Ask user input for unique id

boolean idAvailability = false;

String idNum = "";

while(!idAvailability){ // User must input an ID number that has not been used

System.out.print("Enter ID number: ");

idNum = myObj.next();

idAvailability = myBank.searchIDAvailability(idNum);

}

System.out.print("Enter first name: ");

String f= myObj.next();

System.out.print("Enter last name: ");

String l= myObj.next();

//Create a unique account number

boolean accountNumberAvailability = false;

long accountNum = 0;

while(!accountNumberAvailability){

accountNum = Long.parseLong(RandomNumbers(10));

if(myBank.searchTarget(accountNum)==-1){

accountNumberAvailability = true;

}

}

// Create a customer profile and add it to the linked list

Customer myCustomer = new Customer(idNum,f,l,accountNum);

myBank.addCustomer(myCustomer);

System.out.println("Dear "+f+" "+l+",please choose the debit card tier ");

System.out.println("1. Blue | Withdraw Limit : 10M | Deposit Limit : 50M | Transfer Limit : 50M");

System.out.println("2. Gold | Withdraw Limit : 10M | Deposit Limit : 80M | Transfer Limit : 75M");

System.out.println("3. Platinum | Withdraw Limit : 10M | Deposit Limit : 100M | Transfer Limit : 100M");

int tierNum = myObj.nextInt();

char tierChr='x';

switch (tierNum){

case 1:

System.out.println("Blue Tier selected");

tierChr='b';

break;

case 2:

System.out.println("Gold Tier selected");

tierChr='g';

break;

case 3:

System.out.println("Platinum Tier selected");

tierChr='p';

break;

default:

System.out.println("Invalid input");

break;

}

System.out.print("Enter starting balance: ");

double newBalance = myObj.nextDouble();

//Create a temporary account

Account newAccount = new Account('n',0,"00/00",0,0,0);

myBank.getCustomers(index).setAccount(newAccount);

//Generate a unique 16-digit card number

boolean cardNumberAvailable = false;

long sn = 0;

while(!cardNumberAvailable){

sn = Long.parseLong(RandomNumbers(16));

cardNumberAvailable = myBank.searchCNAvailability(sn);

}

System.out.println("Card Number Generated");

// Generate a 3-digit CVV

int cvv = Integer.parseInt(RandomNumbers(3));

System.out.println("CVV Generated");

// User will be required to create a 6-digit PIN. A PIN in valid format is required to break out of the loop.

boolean pinCreated = false;

String pinStr = "";

int pinInt = 0;

while(!pinCreated){

System.out.print("Enter 6-digit PIN: ");

pinStr = myObj.next();

int length=0;

for(int i=0; i<pinStr.length();i++){

length++;

}

if(length==6){

pinCreated=true;

pinInt = Integer.parseInt(pinStr);

}

else{

System.out.println("Error: PIN must be in 6 digits format");

}

}

// Generate expiration date for the card according to current date

String expirationDate = GetExpirationDate();

// Set the new bank account according to generated and inputted data

Account tempAccount = new Account(tierChr,sn,expirationDate,cvv,pinInt,newBalance);

myBank.getCustomers(index).setAccount(tempAccount);

// Print information of the bank account and debit card

System.out.println("You've successfully opened your bank account and created your debit card!");

System.out.println("Account Number: "+accountNum);

System.out.println("Card Number: "+ sn);

System.out.println("Expiration Date: "+expirationDate);

System.out.println("CVV: "+ cvv);

System.out.println("Balance: "+ (String.format("%.03f",newBalance)));

}

private static void DeleteAccount(){

int i = RunSearch();

System.out.println("Dear Mr./Ms. "+ myBank.getCustomers(i).getFullName()+" , Your bank account has been deleted");

myBank.deleteCustomer(i); //Remove customer from LinkedList

}

private static void CheckBalance(int index){

double currentBalance = myBank.getCustomers(index).getAccount().getBalance();

System.out.println("Balance: "+ (String.format("%.03f",currentBalance))); //Display current balance

}

private static void WithdrawBalance(int index){

System.out.print("Enter withdraw amount: ");

double amount = myObj.nextDouble();

myBank.getCustomers(index).getAccount().withdraw(amount); //Subtract current balance by input amount

}

private static void DepositBalance(int index){

System.out.print("Enter deposit amount: ");

double amount = myObj.nextDouble();

myBank.getCustomers(index).getAccount().deposit(amount); //Add current balance by input amount

}

private static void TransferBalance(int index){

if(index!=-1){

if(myBank.getNumberOfCustomers()>=2){

System.out.print("Enter account number:");

long accountNumber = myObj.nextLong();

int targetIndex = myBank.searchTarget(accountNumber);

if(targetIndex!=-1 && (index!=targetIndex)){ //Upon verifying the account number exist and is not of the user's,

System.out.print("Enter the nominal for transfer:"); //Ask the user to input the nominal amount

double nominal = myObj.nextDouble(); //Declare nominal's value to be of user input

myBank.getCustomers(index).getAccount().transferSender(nominal); //Subtract sender's balance by nominal

myBank.getCustomers(targetIndex).getAccount().transferRecipient(nominal); //Add recipient's balance by nominal

}

else{

System.out.println("Error: Invalid account number");

}

}

else{

System.out.println("Error: Insufficient number of customers for a transfer ");

}

}

else{

System.out.println("Error: Customer not found");

}

}

private static void printMenu(){

// User will stay on said menu until they decide to go back or quit the menu. Users are given several options on each menu. The user inputs will then call a function.

//Main Menu

while(inServiceMenu){

System.out.println("---SERVICE MENU---");

System.out.println("0. Quit");

System.out.println("1. Bank Teller");

System.out.println("2. ATM");

int choice = myObj.nextInt();

switch (choice){

case 0: QuitApp();break;

case 1: enableTeller();break;

case 2: if(myBank.getNumberOfCustomers()>0){index=-1;enableATM();break;}

default: System.out.println("Error: Invalid choice");break;

}

}

// Teller Menu

while(inTellerMenu){

System.out.println("---TELLER MENU---");

System.out.println("0. Back");

System.out.println("1. Create Account");

System.out.println("2. Close Account");

int choice = myObj.nextInt();

switch (choice){

case 0: disableTeller();break;

case 1: CreateAccount();break;

case 2: DeleteAccount();break;

default: System.out.println("Error: Invalid choice");break;

}

}

// ATM Menu

while(inATMMenu){

if(index==-1){

index=RunSearch();//If a debit card is not inserted yet, then ask for one

}

if(index!=-1){ // Upon verification, display the menu options for the user to choose from

System.out.println("---TRANSACTION MENU---");

System.out.println("0. Back");

System.out.println("1. Check Balance");

System.out.println("2. Withdraw");

System.out.println("3. Deposit");

System.out.println("4. Transfer");

int choice = myObj.nextInt();

switch (choice){

case 0: disableATM(); break;

case 1: CheckBalance(index); break;

case 2: WithdrawBalance(index);break;

case 3: DepositBalance(index);break;

case 4: TransferBalance(index);break;

default: System.out.println("Error: Invalid choice");break;

}

}

else if(index==-1){ //If no match identity is found,

System.out.println("Error: Card Verification Failed"); //Informs user of invalid input

disableATM(); // Return to Service Menu Display

}

}

}

public static void main(String[] args) {

// Keep the program alive

while(true){

printMenu();

}

}

}