//: testing/EnglishTesting.java

package testing;
import connection.*;
import java.util.ArrayList;
import java.text.NumberFormat;

/**
 * EnglishTesting  - class for testing of knowledge English language
 * @version 1.0
 * @author Shpatserman Maria
 */
public class EnglishTesting {
    
    /** skill - count of correct answers*/
    Integer skill;
    /** errors - count of improper answers*/
    Integer errors;
    /** countQuests - count of all questions*/
    Integer countQuests;
    /** improperAnswers - long description of an improper answers*/
    String improperAnswers;

    /**
     * In constructor we setup default settings
     */
    public EnglishTesting(){
        
        skill = 0;
        errors = 0;
        countQuests = 0;
        improperAnswers = new String();


    }
    
    /** Method gets a random english word
     * @return random english word
     */
    public String getEngWord(DataConnection data){
        String englishWord;
        englishWord = data.returnRandomWord();

        return englishWord;

    }
    /** Method  returns true if params englishWord and russianWord are matched
     * @param englishWord testing word
     * @param russianWord check answer
     *
     */
    boolean checkAnswer(String englishWord, String russianWord,DataConnection data){
       // System.out.println("checkAnswer");
        ArrayList<String> answersList = data.returnAnswersByWord(englishWord);
        return answersList.contains(russianWord);

    }
    /**
     * Method returns string with number of the question
     * @param englishWord question
     * @param russianWord obtained word
     * @param questionNumber question number
     * @param data connection to DB
     * @return
     */
    String generateAnswerForImproperWord(String englishWord, String russianWord, Integer questionNumber,DataConnection data){
        //System.out.println("generateAnswerForImproperWord");
        String answer = new String();
        answer = "Неправильный ответ на вопрос № "+questionNumber+"\n";
        answer = answer +"Слово "+ englishWord+"\n";
        answer = answer +"Ваш ответ "+ russianWord+"\n";
        answer = answer +"Правильный ответ "+ data.returnAnswersByWord(englishWord);
        return answer;

    }
/**
 * Iterator for errors and skills
 * @param englishWord question
 * @param russianWord obtained word
 * @param questionNumber question number
 * @param data connection to DB
 */
    public void calcSkill(String englishWord, String russianWord, Integer questionNumber,DataConnection data){
       
        countQuests++;
        if (checkAnswer(englishWord,russianWord,data)) {
            skill++;
        }
        else {
            errors++;
            improperAnswers = improperAnswers + generateAnswerForImproperWord(englishWord,russianWord,questionNumber,data)+"\n";

        }
        
    }
    /**
     * Method returns percent of correct answers like 100%
     * @return
     */
    String calcPercent(){
        if (countQuests>0){
            double percent = skill.doubleValue()/countQuests.doubleValue();           
            NumberFormat percentFormat = NumberFormat.getPercentInstance();
            percentFormat.setMaximumFractionDigits(1);
            String result = percentFormat.format(percent);
            return result;
        }
        else
        {
            return "100%";
        }
        
    }

    /** Method returns results of the testing
     * 
     * @return Long string with Count of correct Answers, Incorrect answers etc.
     */
    public String getResults(){

        if (errors == 0){
            return "Великолепно! "+"\n"+"Результат "+calcPercent()+"\n"+"Правильных ответов "+skill +
                    " из "+countQuests;


        }
        else {
            String answer = new String();
            answer = "Результат "+calcPercent()+"\n"+"Правильных ответов "+skill +
                    " из "+countQuests+"\n"+"Ошибок "+errors+"\n"+improperAnswers;
            return answer;
        }
       
    }


}