package pszczolkowskisebastian.simplequiz.ui;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.util.Log;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import com.squareup.picasso.Picasso;
import java.util.ArrayList;
import java.util.List;
import pszczolkowskisebastian.simplequiz.R;
import pszczolkowskisebastian.simplequiz.controller.RetrofitManager;
import pszczolkowskisebastian.simplequiz.model.gsonQuestion.Answer;
import pszczolkowskisebastian.simplequiz.model.gsonQuestion.Question;
import pszczolkowskisebastian.simplequiz.model.gsonQuestion.QuestionObject;
import pszczolkowskisebastian.simplequiz.model.gsonTitle.QuizTitleBranch;
import pszczolkowskisebastian.simplequiz.model.helper.Constants;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

import static android.view.View.GONE;

/**
 * Created by Sebastian on 01.12.2016.
 */

public class QuestionActivity extends AppCompatActivity {

  private ImageView questionPicture;

  private static final String TAG = QuestionActivity.class.getSimpleName();
  private TextView questionTextView;
  private RadioButton answer1, answer2, answer3, answer4;

  private RetrofitManager myQuestionManager;

  private List<RadioButton> answerRadioButtonList = new ArrayList<>();
  private List<Question> questionsList = new ArrayList<>();
  private int questionCurrentIndex = 0;
  private RadioGroup answersRadioGroup;
  private QuizTitleBranch quizTitleBranch; //quiz title from first activity
  private TextView quizTitle; //quiz title to view in this activity
  private int correctAnswers = 0;

  private ProgressBar progressBar;
  private TextView progressStatusValue;
  private QuestionObject myQuestionObject;
  private List<Integer> answerRadioButtonIdsList = new ArrayList<>();

  @Override protected void onCreate(@Nullable Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_question);

    initGettingExtras();
    initViews();
    initRetrofit();
  }

  private void initGettingExtras() {

    quizTitleBranch = getIntent().getExtras().getParcelable(Constants.REFERENCE.QUIZ);
  }

  private void initViews() {

    questionPicture = (ImageView) findViewById(R.id.questionPicture);

    questionTextView = (TextView) findViewById(R.id.textViewQuestion);
    progressBar = (ProgressBar) findViewById(R.id.progressBar);
    progressStatusValue = (TextView) findViewById(R.id.progressBarInfo);
    quizTitle = (TextView) findViewById(R.id.quizTitle);

    quizTitle.setText(quizTitleBranch.title);

    answer1 = (RadioButton) findViewById(R.id.radioButtonAnswer1);
    answer2 = (RadioButton) findViewById(R.id.radioButtonAnswer2);
    answer3 = (RadioButton) findViewById(R.id.radioButtonAnswer3);
    answer4 = (RadioButton) findViewById(R.id.radioButtonAnswer4);

    answersRadioGroup = (RadioGroup) findViewById(R.id.radioGroup);

    answerRadioButtonList.add(answer1);
    answerRadioButtonList.add(answer2);
    answerRadioButtonList.add(answer3);
    answerRadioButtonList.add(answer4);

    // answer IDs list:
    answerRadioButtonIdsList.add(R.id.radioButtonAnswer1);
    answerRadioButtonIdsList.add(R.id.radioButtonAnswer2);
    answerRadioButtonIdsList.add(R.id.radioButtonAnswer3);
    answerRadioButtonIdsList.add(R.id.radioButtonAnswer4);

    answersRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
      @Override public void onCheckedChanged(RadioGroup radioGroup, int checkedId) {

        RadioButton checkedRadioButton = (RadioButton) radioGroup.findViewById(checkedId);
        checkIfAnswerIsCorrect(checkedRadioButton);

        initNextQuestionUI();
      }
    });
  }

  private void checkIfAnswerIsCorrect(RadioButton checkedRadioButton) { /*TODO*/

    final Question currentQuestion = getCurrentQuestion();
    final String checkedAnswerText = (String) checkedRadioButton.getText();

    int correctAnswerIndex = getCorrectAnswerIndex(currentQuestion.getAnswers());
    int checkedRadioButtonIndex = getCheckedRadioButtonIndex(checkedRadioButton);

    if (correctAnswerIndex == checkedRadioButtonIndex) { // CORRECT ANSWER:
      correctAnswers++;
    } else { // INCORRECT:

    }

    /*for (Answer answer : currentQuestion.getAnswers()) {

      final Integer isCorrect = answer.getIsCorrect();
      final boolean isTheAnswerCorrect = isCorrect != null && isCorrect == 1;

      if (isTheAnswerCorrect) {
        if (checkedAnswerText.equals(answer.getText())) {

          correctAnswers++;
        }
      }
    }*/
  }

  private int getCheckedRadioButtonIndex(RadioButton checkedRadioButton) {
    for (int i = 0; i < answerRadioButtonIdsList.size(); i++) {
      final Integer radioId = answerRadioButtonIdsList.get(i);
      if (checkedRadioButton.getId() == radioId) {
        return i;
      }
    }
    return -1;
  }

  private int getCorrectAnswerIndex(List<Answer> answers) {
    for (int i = 0; i < answers.size(); i++) {
      final Answer answer = answers.get(i);
      final boolean isAnswerCorrect = answer.getIsCorrect() != null && answer.getIsCorrect() == 1;
      if (isAnswerCorrect) {
        return i;
      }
    }
    return -1;
  }

  private void initRetrofit() {
    myQuestionManager = new RetrofitManager();

    final Call<QuestionObject> questionObject =
        myQuestionManager.getMyRetrofitServiceQuestion().getAllQuestions(quizTitleBranch.id);

    questionObject.enqueue(new Callback<QuestionObject>() {
      @Override
      public void onResponse(Call<QuestionObject> call, Response<QuestionObject> response) {
        if (response.body() == null) return;

        myQuestionObject = response.body();
        questionsList = response.body().getQuestions();

        int questionsListSize = questionsList.size() - 1;
        progressStatusValue.setText(questionCurrentIndex + "/" + questionsListSize);

        initQuestionUI(questionsList.get(0));
        questionCurrentIndex++;
      }

      @Override public void onFailure(Call<QuestionObject> call, Throwable t) {
        Log.d(TAG, "onFailure() called with: call = [" + call + "], t = [" + t + "]");
      }
    });
  }

  private void initNextQuestionUI() {

    if (questionCurrentIndex >= questionsList.size() - 1) {

      finishQuiz();
      return;
    }

    initQuestionUI(getCurrentQuestion());

    countForProgressBar();

    questionCurrentIndex++;

    // clear check:
    for (RadioButton radioButton : answerRadioButtonList) {
      radioButton.setChecked(false);
    }

    // add to DB Realm
  }

  private Question getCurrentQuestion() {
    return questionsList.get(questionCurrentIndex);
  }

  private void countForProgressBar() {

    int questionListSize = questionsList.size() - 1;
    progressStatusValue.setText(questionCurrentIndex + " / " + questionListSize);

    progressBar.setMax(questionsList.size() - 1);
    progressBar.setProgress(questionCurrentIndex);
  }

  private void finishQuiz() {
    Log.d(TAG, "finishQuiz: result = " + correctAnswers);

    Intent intent = new Intent(this, FinalActivity.class);
    final int questionsCount = myQuestionObject.getQuestions().size();

    int percentOfCorrectAnswers = (correctAnswers * 100) / questionsCount;
    intent.putExtra("result", percentOfCorrectAnswers);
    intent.putExtra(Constants.REFERENCE.QUIZ, quizTitleBranch);
    startActivity(intent);
  }

  private void initQuestionUI(Question question) {

    questionTextView.setText(question.getText());

    Context context = getApplicationContext();
    if (question == null) return;

    initImage(question, context);
    // init answers:
    for (int i = 0; i < question.getAnswers().size(); i++) {

      Answer answer = question.getAnswers().get(i);
      RadioButton radioButton = answerRadioButtonList.get(i);
      radioButton.setText(answer.getText());
    }

    hideUnusedRadioButtons(question);
  }

  private void initImage(Question question, Context context) {
    if (question.getImage() != null || question.getImage().getUrl() != null) {
      String imageUrl = question.getImage().getUrl();
      if (imageUrl != null && !TextUtils.isEmpty(imageUrl)) {
        Picasso.with(context).load(imageUrl).into(questionPicture);
      }
    }
  }

  private void hideUnusedRadioButtons(Question question) {
    for (int i = question.getAnswers().size(); i < answerRadioButtonList.size(); i++) {
      RadioButton radioButton = answerRadioButtonList.get(i);
      radioButton.setVisibility(GONE);
    }
  }
}