import java.util.*;
import java.io.*;
import javax.swing.JOptionPane;
public class login {
  public static void main (String [] args) throws IOException {
  String usernameEntered;
  String passwordEntered;


  ArrayList<String> user = new ArrayList<String>();
  ArrayList<String> pass = new ArrayList<String>();
  ArrayList<String> first = new ArrayList<String>();
  ArrayList<String> last = new ArrayList<String>();
  File file = new File("UsersInfo.txt");
  Scanner inputFile = new Scanner(file);
  String fName="";
  String lName="";

  int tries = 3;
  boolean usernameFlag = true;
  boolean passwordFlag = true;
    while (inputFile.hasNext())
  {
    String str = inputFile.nextLine();
    String usernameList = str.split("\t")[0];
    String passwordList = str.split("\t") [1];
    String firstName = str.split("\t") [2];
    String lastName = str.split("\t") [3];
    user.add(usernameList);
    pass.add(passwordList);
    first.add(firstName);
    last.add(lastName);

     }

    while(tries>0){
      usernameEntered = JOptionPane.showInputDialog("Enter your username");
      passwordEntered = JOptionPane.showInputDialog("Now enter your password");
      for (int i = 0; i < user.size(); i++){
        if (!usernameEntered.equals(user.get(i)))
          usernameFlag = false;}

      for (int f = 0; f < pass.size(); f++){
        if (!passwordEntered.equals(pass.get(f)))
          passwordFlag = false;}

if ((passwordFlag = false) || (usernameFlag = false)){
  JOptionPane.showMessageDialog(null, "Error, you have " + tries + " tries left.");
  tries--;}

for (int b = 0; b < user.size(); b++)
        if(usernameEntered.equals(user.get(b)))
    {
        for(int j = 0; j < pass.size(); j++)
        {
          if(passwordEntered.equals(pass.get(j))) {
             JOptionPane.showMessageDialog(null, "Starting Quiz...");
             fName=first.get(j);
             lName=last.get(j);
             JOptionPane.showMessageDialog(null, "Welcome " + fName + " " + lName + "!");}
          tries = 0;
    }
   }
  }
  File quest = new File("TestBank.txt");
  File answ = new File("AnswBank.txt");
  Scanner inputFile2 = new Scanner(quest);
  Scanner inputFile3 = new Scanner(answ);
  Scanner keyboard = new Scanner(System.in);
  ArrayList<String> questions = new ArrayList<String>();
  ArrayList<String> answers = new ArrayList<String>();
  ArrayList<String> incorrect = new ArrayList<String>();
  ArrayList<String> enteredAnswer = new ArrayList<String>();
  while(inputFile2.hasNextLine())
    questions.add(inputFile2.nextLine());
  while(inputFile3.hasNextLine())
    answers.add(inputFile3.nextLine());
  Random rand = new Random();
  String userAnswer;
  int counter=0;
  wrong=0;

  double begin=System.currentTimeMillis();

  for(int i=0; i<10; i++){
    int x = rand.nextInt(questions.size());
    JOptionPane.showMessageDialog(null,questions.get(x));
    userAnswer=JOptionPane.showInputDialog("Enter your answer. (True or False)");
    enteredAnswer.get(x)=userAnswer;
    if((userAnswer.equals("t"))||(userAnswer.equals("T")))
      userAnswer="true";
    if((userAnswer.equals("f"))||(userAnswer.equals("F")))
      userAnswer="false";
    userAnswer=userAnswer.toUpperCase();
      if(((userAnswer.equals("TRUE"))||(userAnswer.equals("FALSE"))))
      {
        if(userAnswer.toUpperCase().equals(answers.get(x).toUpperCase())){
          JOptionPane.showMessageDialog(null,"Correct!");
          counter++;}
        else{
            JOptionPane.showMessageDialog(null,"Incorrect!");
            incorrect.get(wrong)=x;
            wrong++;
        }
      else{
          JOptionPane.showMessageDialog(null,"Please enter a valid answer.");
          JOptionPane.showMessageDialog(null,questions.get(x));
          userAnswer=JOptionPane.showInputDialog("Enter your answer. (True or False)");
          if((userAnswer.equals("t"))||(userAnswer.equals("T")))
            userAnswer="true";
          if((userAnswer.equals("f"))||(userAnswer.equals("F")))
            userAnswer="false";
          userAnswer=userAnswer.toUpperCase();
          if(userAnswer.toUpperCase().equals(answers.get(x).toUpperCase())){
          JOptionPane.showMessageDialog(null,"Correct!");
          counter++;}
          else{
          JOptionPane.showMessageDialog(null,"Incorrect!");
          incorrect.get(wrong)=x;
          wrong++;
        }
      }
    }
  double end=System.currentTimeMillis()-begin;
  end=end/1000.0;
  JOptionPane.showMessageDialog(null,"Name: " + fName + "" + lName + "\nIt took you " + String.format("%.0f",end) + " seconds to complete the test.\nScore: " + counter + " out of 10 correct.");
  JOptionPane.showMessageDialog(null,"Your Answer: " +enteredAnswers.get(incorrect.get(wrong))+"\tCorrect Answer: "+answers.get(incorrect.get(wrong));
}
}