import 'dart:io';

double totalBal = 100000;
int id1 = 123;
int id2 = 456;
int passId1 = 111;
int passId2 = 222;


int userAccount()
{
  int a;
  int b;
  stdout.write("Masukan ID Anda : ");
  a = int.parse(stdin.readLineSync());
  stdout.write("Password : ");
  b = int.parse(stdin.readLineSync());

  if(a == id1 && b == passId1 || a == id2 && b == passId2)
  {
    drawMainMenu();
  } else
  {
    print("ID atau Pass Anda Salah: !");
    userAccount();
  }
}

void main()
{
  userAccount();
  drawMainMenu();
}

void drawMainMenu()
{
  int pilihan;

  print("\n-- WELCOME TO ATM MAIN MENU --");
  print("\n1. Melihat Tabungan");
  print("\n2. Menarik Uang");
  print("\n3. Setor Uang");
  print("\n4. Exit");
  stdout.write("\nChoice -> ");
  pilihan = int.parse(stdin.readLineSync());

  switch(pilihan)
  {
    case 1 :
      viewAccountInfo();
      break;
    case 2 :
      withDraw();
      break;
    case 3 :
      addFunds();
      break;
    case 4 :
      print("Terima Kasih Sudah Menggunakan ATM");
  }
}

void viewAccountInfo()
{
  print("\n-- Informasi Account Anda --");
  print("\t-- Total : Rp. $totalBal");
  drawMainMenu();
}

void deposit(int depAmount)
{
  print("\n*** Tolong Masukan Uang Anda Sekarang ***");
  totalBal += depAmount;
}

void checkNsf(int withdrawAmount)
{
  if(totalBal - withdrawAmount < 0)
  {
    print("\n*** ERROR!!! Insufficient Funds in Your Account ***");
  } else
  {
    totalBal -= withdrawAmount;
    print("\n*** Tolong Ambil Uang Anda Sekarang ***");
  }
}

void addFunds()
{
  int pilihann;
  print("\nMenabung: ");
  print("\n1.- Rp. 20.000");
  print("\n2.- Rp. 50.000");
  print("\n3.- Rp. 100.000");
  print("\n4.- Rp. 1.000.000");
  print("\n5.- Kembali ke Menu");

  stdout.write("\nChoice -> ");
  pilihann = int.parse(stdin.readLineSync());

  switch(pilihann)
  {
    case 1 :
      deposit(20000);
      drawMainMenu();
      break;

    case 2 :
      deposit(50000);
      drawMainMenu();
      break;

    case 3 :
      deposit(100000);
      drawMainMenu();
      break;

    case 4 :
      deposit(1000000);
      drawMainMenu();
      break;

    case 5 :
      drawMainMenu();
      break;
  }
}

void withDraw()
{
  int pilihann;
  print("\nMenarik Uang: ");
  print("\n1.- Rp. 20.000");
  print("\n2.- Rp. 50.000");
  print("\n3.- Rp. 100.000");
  print("\n4.- Rp. 1.000.000");
  print("\n5.- Kembali ke Menu");

  stdout.write("\nChoice -> ");
  pilihann = int.parse(stdin.readLineSync());

  switch(pilihann)
  {
    case 1 :
      checkNsf(20000);
      drawMainMenu();
      break;

    case 2 :
      checkNsf(50000);
      drawMainMenu();
      break;

    case 3 :
      checkNsf(100000);
      drawMainMenu();
      break;

    case 4 :
      checkNsf(1000000);
      drawMainMenu();
      break;

    case 5 :
      drawMainMenu();
      break;
  }
}