package cz.muni.fi.bronchus.questions;

import java.util.Vector;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Combined Question derived from MultipleChoice and Fill-In-Blank questions. User has amount of
 * the answers and the one expecting the Fill-In-Blank input from the student.
 * @author Tomáš Udržal
 */
public class CombinedQuestion extends Question {

    /**
     * correct answer indexed as the letter 'A'..'Z'
     */
    protected String correctAnswer;

    /**
     * Vector of answers
     */
    private Vector answers;
    
    /**
     * Shuffle order of answers
     */
    private boolean shuffle;
    
    /**
     * Answer wording for the FIB input
     */
    private String fIBAnswer;
    
    /**
     * Length in chars of the FIB input
     */
    private int fIBAnswerLength;
    
    /** Creates a new instance of CombinedQuestion */
    public CombinedQuestion() {
        super("Combined");
        correctAnswer="";
        answers=new Vector();
        shuffle=false;
        fIBAnswer="";
        fIBAnswerLength=-1;
    }
    
    /**
     * Setter method for the correct answer
     * @param x letter 'A'..'Z'
     */
    public void setCorrectAnswer(String x) { correctAnswer=x; }
    
    /**
     * Getter method for the correct answer
     * @return letter 'A'..'Z'
     */
    public String getCorrectAnswer() { return correctAnswer; }

    /**
     * Adds an answer to the end of the Vector
     * @param x answer to be added
     */
    public void addAnswer(String x) { answers.add(x); }
    
    /**
     * Getter method for the Vector of answers
     * @return Vector of answers
     */
    public Vector getAnswers() { return answers; }

    /**
     * Setter method for the shuffle order of answers
     * @param x true if shuffle is enabled otherwise false
     */
    public void setShuffle(boolean x) { shuffle=x; }
    
    /**
     * Getter method for the shuffle order of answers
     * @return true if shuffle is enabled otherwise false
     */
    public boolean isShuffle() { return shuffle; }

    /**
     * Setter method for the FIB answer wording
     * @param x FIB answer wording
     */
    public void setFIBAnswer(String x) { fIBAnswer=x; }
    
    /**
     * Getter method for the FIB answer wording
     * @return FIB answer wording
     */
    public String getFIBAnswer() { return fIBAnswer; }
    
    /**
     * Setter method for the length of the FIB input
     * @param x length of the FIB input
     */
    public void setFIBAnswerLength(int x) { fIBAnswerLength=x; }
    
    /**
     * Getter method for the length of the FIB input
     * @return length of the FIB input
     */
    public int getFIBAnswerLength() { return fIBAnswerLength; }
        
    /**
     * Method for generating a response processing condition from a selected answers.
     * If the correct answer is FIB answer, returns empty String.
     * @return response processing condition
     */
    public String generateCondition() {
        String s="";
        s=correctAnswer+"==true";
        return s;
    } 

}