import waba.ui.*;
import waba.fx.*;
import waba.sys.*;
import waba.util.*;

public class Quiz extends MainWindow {

  MessageBox mb;
  Button btnNext, btnPrevious, btnGradeIt, btnQuit;
  Button btnStart, btnHelp, btnAbout;
  Label lbQuestionNumber, lbQuestion1, lbQuestion2, lbQuestion3, lbAnswerA, lbAnswerB, lbAnswerC;
  Radio rdAnswerA, rdAnswerB, rdAnswerC;
  RadioGroup rg;
  ComboBox cb;
  Vector vQuestions;
  String arAnswers[];
  String arKeyAnswers[];
  int arRadioState[];
  int currentQuestion;
  int question;

  public void onStart() {

      String items[] = {"Java", "State Capitals", "Communications", "More Comms", "Even more Comms", "System Analysis"};

      vQuestions = new Vector(70);
      arAnswers = new String[10];
      arKeyAnswers = new String[10];
      arRadioState = new int[10];

      rg = new RadioGroup();

      // add question number
      add(lbQuestionNumber = new Label(" "));
      lbQuestionNumber.setRect(0,0,158,10);

      // add up to three line of question
      add(lbQuestion1 = new Label(" "));
      lbQuestion1.setRect(0,20,158,10);
      add(lbQuestion2 = new Label(" "));
      lbQuestion2.setRect(0,30,158,10);
      add(lbQuestion3 = new Label(" "));
      lbQuestion3.setRect(0,40,158,10);

      // add Answer A
      add(rdAnswerA = new Radio("",rg));
      rdAnswerA.setRect(0,60,158,10);
      add(lbAnswerA = new Label(" "));
      lbAnswerA.setRect(13,60,158,10);

      // add Answer B
      add(rdAnswerB = new Radio("",rg));
      rdAnswerB.setRect(0,70,158,10);
      add(lbAnswerB = new Label(""));
      lbAnswerB.setRect(13,70,158,10);

      // add Answer C
      add(rdAnswerC = new Radio("",rg));
      rdAnswerC.setRect(0,80,158,10);
      add(lbAnswerC = new Label(" "));
      lbAnswerC.setRect(13,80,158,10);

      add(cb = new ComboBox(items));
      cb.setRect(0,100,158,15);
      //cb.select(0);

      // add button for Next, Previous, Grade It, and Quit
      add(btnNext = new Button("Next"));
      btnNext.setRect(0,this.height-30,PREFERRED,15);
      add(btnPrevious = new Button("Previous"));
      btnPrevious.setRect(30,this.height-30,PREFERRED,15);
      add(btnGradeIt = new Button("Grade It"));
      btnGradeIt.setRect(70,this.height-30,PREFERRED,15);
      add(btnQuit = new Button("Quit"));
      btnQuit.setRect(115,this.height-30,PREFERRED,15);

      // add button for Pick Exam, Help, About
      add(btnStart = new Button("Start"));
      btnStart.setRect(0,this.height-15,PREFERRED,15);
      add(btnHelp = new Button("Help"));
      btnHelp.setRect(50,this.height-15,PREFERRED,15);
      add(btnAbout = new Button("About"));
      btnAbout.setRect(80,this.height-15,PREFERRED,15);

      showHelp();

  }

  public void onEvent(Event event) {
    if (event.type == ControlEvent.PRESSED) {
	if (event.target == btnQuit)
	    exit(0);
        else
        if (event.target == btnAbout)
          showAbout();
        else
        if (event.target == btnHelp)
          showHelp();
        else
        if (event.target == btnNext) {
          doNextButton();
        }
        else
        if (event.target == btnStart) {
          doStart(cb.getSelectedIndex());
        }
        else
        if (event.target == btnPrevious) {
          if (currentQuestion == 0) {
            lbQuestionNumber.setText("!!! First Question");
            Sound.beep();
          }
          else {
            currentQuestion -= 7;
            showQuestions(currentQuestion, vQuestions);
            lbQuestionNumber.setText("Question number " + --question);
            updateRadioState(question);
          }
        }
        else
        if (event.target == btnGradeIt)
          gradeIt();
        if (event.target == rdAnswerA) {
          arAnswers[question] = lbAnswerA.getText();
          arRadioState[question] = 1;
        }
        else
        if (event.target == rdAnswerB) {
          arAnswers[question] = lbAnswerB.getText();
          arRadioState[question] = 2;
        }
        else
        if (event.target == rdAnswerC) {
          arAnswers[question] = lbAnswerC.getText();
          arRadioState[question] = 3;
        }
    }
  }

  // do Next Button, read answer, clears radio button for the next question
  private void doNextButton() {
    if (currentQuestion > 62) {
      lbQuestionNumber.setText("!!! Last Question");
      Sound.beep();
    }
    else {  // check for answers

      currentQuestion += 7;
      showQuestions(currentQuestion, vQuestions);
      lbQuestionNumber.setText("Question number " + ++question);

      updateRadioState(question);
    }
  }

  private void updateRadioState(int n) {

    // clears all radios
    rdAnswerA.setChecked(false);
    rdAnswerB.setChecked(false);
    rdAnswerC.setChecked(false);

    // switch only if already answered
    switch(arRadioState[n]) {
      case 1  : rdAnswerA.setChecked(true);
                break;
      case 2  : rdAnswerB.setChecked(true);
                break;
      case 3  : rdAnswerC.setChecked(true);
                break;
      default : break;
    }
  }

  private void doStart(int index) {
    question = 0;
    currentQuestion = 0;
    clearArrays();
    String fileName = "Q00"+index+".jECb.Q00"+index;
    ReaderQuestion rq = new ReaderQuestion(fileName);
    vQuestions = rq.readRecords();
    buildKeyAnswers();
    showQuestions(currentQuestion, vQuestions);
  }

  private void clearArrays() {
    for(int i=0; i<10; i++) {
      arAnswers[i] = null;
      arKeyAnswers[i] = null;
      arRadioState[i] = 0;
    }
  }

  // build key answers, the seventh record is the key answers
  private void buildKeyAnswers() {
    arKeyAnswers[0] = (String) vQuestions.get(6);
    arKeyAnswers[1] = (String) vQuestions.get(13);
    arKeyAnswers[2] = (String) vQuestions.get(20);
    arKeyAnswers[3] = (String) vQuestions.get(27);
    arKeyAnswers[4] = (String) vQuestions.get(34);
    arKeyAnswers[5] = (String) vQuestions.get(41);
    arKeyAnswers[6] = (String) vQuestions.get(48);
    arKeyAnswers[7] = (String) vQuestions.get(55);
    arKeyAnswers[8] = (String) vQuestions.get(62);
    arKeyAnswers[9] = (String) vQuestions.get(69);
  }


  // show Questions
  private void showQuestions(int index, Vector v) {
    lbQuestion1.setText((String) v.get(index++));
    lbQuestion2.setText((String) v.get(index++));
    lbQuestion3.setText((String) v.get(index++));
    lbAnswerA.setText((String) v.get(index++));
    lbAnswerB.setText((String) v.get(index++));
    lbAnswerC.setText((String) v.get(index++));
  }

  // grade the quiz
  private void gradeIt() {
    MessageBox mb1;
    String s1[], s2[];
    int correct;
    correct = 0;
    s1 = new String[10];
    s2 = new String[10];
    for(int i=0; i<10; i++)
      if (arKeyAnswers[i].equals(arAnswers[i])) {
        correct++;
        s1[i] = "Question" + (i+1) + " correct!";
        s2[i] = arKeyAnswers[i];
      }
      else {
        s1[i] = "Question" + (i+1) + " wrong! ";
        s2[i] = arKeyAnswers[i];
      }

    String s = String.valueOf(correct);

    mb1 = new MessageBox("Results", "Total Question 10 | You have " + s + " correct"+"|"+
                          s1[0]+"|"+s2[0]+"|"+s1[1]+"|"+s2[1]+"|"+s1[2]+"|"+s2[2]+"|"+s1[3]+"|"+s2[3]+"|"+
                          s1[4]+"|"+s2[4]+"|"+s1[5]+"|"+s2[5]+"|"+s1[6]+"|"+s2[6]+"|"+s1[7]+"|"+s2[7]+"|"+
                          s1[8]+"|"+s2[8]+"|"+s1[9]+"|"+s2[9]);
    mb1.setDoubleBuffer(true);
    popupModal(mb1);

    clearArrays();
    buildKeyAnswers();
    question = 0;
    currentQuestion = 0;
    showQuestions(currentQuestion, vQuestions);
    updateRadioState(question);

  }

  private void showHelp() {
    MessageBox mb1;

    mb1 = new MessageBox("Help", "Pick a topic from the list | by pressing right down arrow | then press start button. | After answering the questions "
                          + " |Use the Next and Previous| buttons to navigate. | Press Grade It button to see | the result of the Quiz.");
    mb1.setDoubleBuffer(true);
    popupModal(mb1);
  }

  // show about ourself
  private void showAbout() {
    mb = new MessageBox("Quiz Program", "Quiz Program by Sonny Cruz | Free for the Palm and compatible. | http://pages.sbcglobal.net/icruz");
    mb.setDoubleBuffer(true);
    popupModal(mb);
  }
}