using UnityEngine;
using UnityEngine.UI;
using TMPro;
using UnityEngine.SceneManagement;
using System.Collections;
using System.Collections.Generic;

public class QuestionAnswer21Mod : MonoBehaviour
{
    [Header("DATA")]
    [Tooltip("Format (virgül ayraçlı, 30 alan): trCevap,enCevap,esCevap,deCevap,frCevap,ptCevap, sonra her dil için 4 şık (doğru,yanlış,yanlış,yanlış) tr/en/es/de/fr/pt sırasıyla.")]
    public TextAsset wordFile;
    public string wordsResourcePath = "Mod21Words";

    [Header("MAIN TEXT")]
    [Tooltip("Ekranda cevap / ifade / kısa bilgi burada gösterilecek.")]
    public TMP_Text questionText;

    [Header("TEXTS")]
    public TMP_Text titleText;
    public TMP_Text languageText;
    public TMP_Text feedbackText;
    public TMP_Text scoreText;
    public TMP_Text comboText;
    public TMP_Text timerText;

    [Header("ANSWER BUTTONS")]
    public Button[] answerButtons;
    public TMP_Text[] answerTexts;

    [Header("MAIN BUTTONS")]
    public Button submitButton;
    public Button backButton;

    [Header("EXTRA BUTTONS")]
    public Button extraTimeButton;
    public Button extraHintButton;
    public Button extraSkipButton;
    public TMP_Text extraTimeCooldownText;
    public TMP_Text extraHintCooldownText;
    public TMP_Text extraSkipCooldownText;

    [Header("SCENES")]
    public string backSceneName = "modsec 21";
    public string resultSceneName = "modres 21";

    [Header("LANGUAGE TEST")]
    [Tooltip("-1 otomatik. 0 TR, 1 EN, 2 ES, 3 DE, 4 FR, 5 PT | QuestionLangID = ekrandaki cevap dili")]
    public int forcedQuestionLanguageIndex = -1;

    [Tooltip("-1 otomatik. 0 TR, 1 EN, 2 ES, 3 DE, 4 FR, 5 PT | AnswerLangID = şıklardaki soru dili")]
    public int forcedAnswerLanguageIndex = -1;

    [Header("GAME SETTINGS")]
    public float startTime = 60f;
    public int basePoints = 50;
    public int wrongPenalty = 50;
    public float correctTimeBonus = 2f;
    public float nextQuestionDelay = 1.15f;

    [Header("EXTRA SETTINGS")]
    public float extraTimeAmount = 5f;
    public float cooldownDuration = 5f;

    [Header("COMBO MULTIPLIERS")]
    public float mult_1to2 = 1f;
    public float mult_3to4 = 1.15f;
    public float mult_5to7 = 1.3f;
    public float mult_8plus = 1.5f;

    [Header("COLORS")]
    public Color normalButtonColor = new Color32(120, 70, 220, 255);
    public Color selectedButtonColor = new Color32(155, 105, 255, 255);
    public Color correctButtonColor = new Color32(70, 240, 130, 255);
    public Color wrongButtonColor = new Color32(255, 80, 95, 255);
    public Color disabledButtonColor = new Color32(90, 75, 120, 255);

    readonly string[] langCodes = { "tr", "en", "es", "de", "fr", "pt" };
    readonly string[] langNames = { "Türkçe", "English", "Español", "Deutsch", "Français", "Português" };

    const string modKey = "Mod21";

    class QuestionAnswerEntry
    {
        public string[] answers = new string[6];

        // Her dil için 4 soru şıkkı:
        // 0 doğru
        // 1 yanlış
        // 2 yanlış
        // 3 yanlış
        public string[] options = new string[24];
    }

    readonly List<QuestionAnswerEntry> allQuestions = new List<QuestionAnswerEntry>();
    readonly List<QuestionAnswerEntry> questionPool = new List<QuestionAnswerEntry>();

    QuestionAnswerEntry currentQuestion;

    // ÖNEMLİ:
    // screenLangIndex = ekrandaki cevap / bilgi dili
    // optionLangIndex = şıklardaki soru cümlelerinin dili
    int screenLangIndex = 0;
    int optionLangIndex = 1;

    int selectedAnswer = -1;
    int correctAnswerIndex = -1;

    int score = 0;
    int combo = 0;
    int correctCount = 0;
    int wrongCount = 0;
    int bestComboThisRun = 0;

    float timeLeft;

    bool gameOver = false;
    bool waitingNextQuestion = false;

    bool extraTimeReady = true;
    bool extraHintReady = true;
    bool extraSkipReady = true;

    Vector3[] originalButtonScales;
    Vector3[] originalButtonPositions;

    void Awake()
    {
        LoadQuestions();
    }

    void Start()
    {
        ResolveLanguages();

        timeLeft = PlayerPrefs.GetFloat("SelectedGameTime", startTime);

        if (timeLeft <= 0f)
            timeLeft = startTime;

        if (allQuestions.Count < 1)
        {
            Debug.LogError("Mod21: En az 1 geçerli TXT satırı gerekli. Yüklenen soru sayısı: " + allQuestions.Count);
            enabled = false;
            return;
        }

        if (questionText == null)
        {
            Debug.LogError("Mod21: questionText atanmadı.");
            enabled = false;
            return;
        }

        if (answerButtons == null || answerButtons.Length < 4 || answerTexts == null || answerTexts.Length < 4)
        {
            Debug.LogError("Mod21: 4 answerButtons ve 4 answerTexts atanmalı.");
            enabled = false;
            return;
        }

        PrepareUI();
        BindButtons();
        ResetQuestionPool();

        UpdateLanguageUI();
        UpdateScoreUI();
        UpdateComboUI();
        UpdateTimerUI();

        NextQuestion();

        Debug.Log("Mod21 Ekran Cevap Dili: " + screenLangIndex + " / " + langNames[screenLangIndex]);
        Debug.Log("Mod21 Şık Soru Dili: " + optionLangIndex + " / " + langNames[optionLangIndex]);
    }

    void Update()
    {
        if (gameOver)
            return;

        timeLeft -= Time.deltaTime;

        if (timeLeft <= 0f)
        {
            timeLeft = 0f;
            UpdateTimerUI();
            GameOver();
            return;
        }

        UpdateTimerUI();
    }

    // TXT FORMAT (virgül ayraçlı, 30 alan):
    // 0-5 cevaplar:
    // trAnswer,enAnswer,esAnswer,deAnswer,frAnswer,ptAnswer
    //
    // 6-29 soru şıkları:
    // trCorrect,trWrong1,trWrong2,trWrong3
    // enCorrect,enWrong1,enWrong2,enWrong3
    // esCorrect,esWrong1,esWrong2,esWrong3
    // deCorrect,deWrong1,deWrong2,deWrong3
    // frCorrect,frWrong1,frWrong2,frWrong3
    // ptCorrect,ptWrong1,ptWrong2,ptWrong3

    void LoadQuestions()
    {
        allQuestions.Clear();

        TextAsset txt = wordFile;

        if (txt == null)
            txt = Resources.Load<TextAsset>(wordsResourcePath);

        if (txt == null)
        {
            Debug.LogError("Mod21: TXT bulunamadı. Şuraya koy: Assets/Resources/" + wordsResourcePath + ".txt");
            return;
        }

        string[] lines = txt.text.Split(
            new[] { '\n', '\r' },
            System.StringSplitOptions.RemoveEmptyEntries
        );

        // İYİLEŞTİRME: Aynı TR cevabı iki kez havuza koymamak için dedupe.
        HashSet<string> seenAnswers = new HashSet<string>();
        int skippedShort = 0;
        int skippedInvalid = 0;
        int skippedDuplicate = 0;

        for (int i = 0; i < lines.Length; i++)
        {
            string line = lines[i].Trim();

            if (string.IsNullOrWhiteSpace(line))
                continue;

            if (line.StartsWith("#"))
                continue;

            string[] p = SplitLineSmart(line);

            if (p.Length < 30)
            {
                skippedShort++;
                Debug.LogWarning("Mod21 TXT eksik satır atlandı. Satır: " + (i + 1) + " Alan sayısı: " + p.Length);
                continue;
            }

            QuestionAnswerEntry entry = new QuestionAnswerEntry();
            bool valid = true;

            for (int l = 0; l < 6; l++)
            {
                entry.answers[l] = CleanField(p[l]);

                if (string.IsNullOrWhiteSpace(entry.answers[l]))
                    valid = false;
            }

            for (int q = 0; q < 24; q++)
            {
                entry.options[q] = CleanField(p[6 + q]);

                if (string.IsNullOrWhiteSpace(entry.options[q]))
                    valid = false;
            }

            if (!valid)
            {
                skippedInvalid++;
                continue;
            }

            string dedupeKey = entry.answers[0].ToLowerInvariant().Trim();

            if (seenAnswers.Contains(dedupeKey))
            {
                skippedDuplicate++;
                continue;
            }

            seenAnswers.Add(dedupeKey);
            allQuestions.Add(entry);
        }

        Debug.Log("Mod21 yüklenen soru sayısı: " + allQuestions.Count +
                  "  (kısa satır: " + skippedShort +
                  ", eksik alan: " + skippedInvalid +
                  ", tekrar: " + skippedDuplicate + ")");
    }

    string[] SplitLineSmart(string line)
    {
        // Birincil format artık virgül. Eski pipe/tab dosyaları da bozulmasın diye fallback bırakıldı.
        if (line.Contains(","))
            return line.Split(',');

        if (line.Contains("|"))
            return line.Split('|');

        if (line.Contains("\t"))
            return line.Split('\t');

        return line.Split(',');
    }

    string CleanField(string s)
    {
        if (string.IsNullOrEmpty(s))
            return "";

        return s.Trim().Trim('"').Trim();
    }

    void ResolveLanguages()
    {
        // SENİN ModSelectLanguageSettings SCRIPTİNE GÖRE:
        // QuestionLangID = ekranda görünen cevap / bilgi dili
        // AnswerLangID   = şıklardaki soru cümlesi dili

        if (forcedQuestionLanguageIndex >= 0 && forcedQuestionLanguageIndex <= 5)
            screenLangIndex = forcedQuestionLanguageIndex;
        else
            screenLangIndex = PlayerPrefs.GetInt("QuestionLangID", 0);

        if (forcedAnswerLanguageIndex >= 0 && forcedAnswerLanguageIndex <= 5)
            optionLangIndex = forcedAnswerLanguageIndex;
        else
            optionLangIndex = PlayerPrefs.GetInt("AnswerLangID", 1);

        screenLangIndex = ClampLanguage(screenLangIndex, 0);
        optionLangIndex = ClampLanguage(optionLangIndex, 1);
    }

    int ClampLanguage(int value, int fallback)
    {
        if (value < 0 || value > 5)
            return fallback;

        return value;
    }

    public void RefreshLanguagesFromPrefs()
    {
        ResolveLanguages();
        UpdateLanguageUI();

        if (currentQuestion != null && !gameOver)
            RefreshCurrentQuestion();
    }

    public void SetQuestionLanguage(int id)
    {
        if (id < 0 || id > 5)
            return;

        // QuestionLangID = ekranda görünen cevap / bilgi dili
        screenLangIndex = id;

        PlayerPrefs.SetInt("QuestionLangID", id);
        PlayerPrefs.SetString("QuestionLangCode", ToCode(id));
        PlayerPrefs.Save();

        UpdateLanguageUI();
        RefreshCurrentQuestion();
    }

    public void SetAnswerLanguage(int id)
    {
        if (id < 0 || id > 5)
            return;

        // AnswerLangID = şıklardaki soru cümlesi dili
        optionLangIndex = id;

        PlayerPrefs.SetInt("AnswerLangID", id);
        PlayerPrefs.SetString("AnswerLangCode", ToCode(id));
        PlayerPrefs.Save();

        UpdateLanguageUI();
        RefreshCurrentQuestion();
    }

    string ToCode(int id)
    {
        switch (id)
        {
            case 0: return "tr";
            case 1: return "en";
            case 2: return "es";
            case 3: return "de";
            case 4: return "fr";
            case 5: return "pt";
            default: return "en";
        }
    }

    void UpdateLanguageUI()
    {
        if (languageText != null)
        {
            languageText.text =
                "EKRAN: " + langNames[screenLangIndex] +
                " | ŞIKLAR: " + langNames[optionLangIndex];
        }

        if (titleText != null)
            titleText.text = GetTitleText();
    }

    string GetTitleText()
    {
        switch (optionLangIndex)
        {
            case 0: return "Doğru Soru Cümlesini Seç";
            case 1: return "Choose the Correct Question";
            case 2: return "Elige la pregunta correcta";
            case 3: return "Wähle den richtigen Fragesatz";
            case 4: return "Choisis la bonne question";
            case 5: return "Escolha a pergunta correta";
            default: return "Choose the Correct Question";
        }
    }

    string GetText(string key)
    {
        int lang = optionLangIndex;

        if (key == "choose")
        {
            if (lang == 0) return "BİR SORU SEÇ";
            if (lang == 1) return "CHOOSE A QUESTION";
            if (lang == 2) return "ELIGE UNA PREGUNTA";
            if (lang == 3) return "WÄHLE EINE FRAGE";
            if (lang == 4) return "CHOISIS UNE QUESTION";
            if (lang == 5) return "ESCOLHA UMA PERGUNTA";
        }

        if (key == "correct")
        {
            if (lang == 0) return "DOĞRU";
            if (lang == 1) return "CORRECT";
            if (lang == 2) return "CORRECTO";
            if (lang == 3) return "RICHTIG";
            if (lang == 4) return "CORRECT";
            if (lang == 5) return "CORRETO";
        }

        if (key == "wrong")
        {
            if (lang == 0) return "YANLIŞ";
            if (lang == 1) return "WRONG";
            if (lang == 2) return "INCORRECTO";
            if (lang == 3) return "FALSCH";
            if (lang == 4) return "FAUX";
            if (lang == 5) return "ERRADO";
        }

        if (key == "correctQuestion")
        {
            if (lang == 0) return "Doğru soru";
            if (lang == 1) return "Correct question";
            if (lang == 2) return "Pregunta correcta";
            if (lang == 3) return "Richtige Frage";
            if (lang == 4) return "Bonne question";
            if (lang == 5) return "Pergunta correta";
        }

        if (key == "skipped")
        {
            if (lang == 0) return "GEÇİLDİ";
            if (lang == 1) return "SKIPPED";
            if (lang == 2) return "SALTADO";
            if (lang == 3) return "ÜBERSPRUNGEN";
            if (lang == 4) return "PASSÉ";
            if (lang == 5) return "PULADO";
        }

        return key;
    }

    void PrepareUI()
    {
        if (questionText != null)
        {
            questionText.alignment = TextAlignmentOptions.Center;
            questionText.textWrappingMode = TextWrappingModes.Normal;
        }

        if (feedbackText != null)
        {
            feedbackText.text = "";
            feedbackText.alignment = TextAlignmentOptions.Center;
            feedbackText.textWrappingMode = TextWrappingModes.Normal;
        }

        originalButtonScales = new Vector3[answerButtons.Length];
        originalButtonPositions = new Vector3[answerButtons.Length];

        for (int i = 0; i < answerButtons.Length; i++)
        {
            if (answerButtons[i] == null)
                continue;

            originalButtonScales[i] = answerButtons[i].transform.localScale;
            originalButtonPositions[i] = answerButtons[i].transform.localPosition;

            answerButtons[i].transition = Selectable.Transition.None;

            if (answerButtons[i].image != null)
                answerButtons[i].image.color = FullAlpha(normalButtonColor);
        }

        HideCooldownTexts();
    }

    void HideCooldownTexts()
    {
        if (extraTimeCooldownText != null)
            extraTimeCooldownText.gameObject.SetActive(false);

        if (extraHintCooldownText != null)
            extraHintCooldownText.gameObject.SetActive(false);

        if (extraSkipCooldownText != null)
            extraSkipCooldownText.gameObject.SetActive(false);
    }

    void BindButtons()
    {
        if (submitButton != null)
        {
            submitButton.onClick.RemoveAllListeners();
            submitButton.onClick.AddListener(OnSubmit);
        }

        if (backButton != null)
        {
            backButton.onClick.RemoveAllListeners();
            backButton.onClick.AddListener(() =>
            {
                SaveProgressOnly();
                SceneManager.LoadScene(backSceneName);
            });
        }

        if (extraTimeButton != null)
        {
            extraTimeButton.onClick.RemoveAllListeners();
            extraTimeButton.onClick.AddListener(OnExtraTime);
        }

        if (extraHintButton != null)
        {
            extraHintButton.onClick.RemoveAllListeners();
            extraHintButton.onClick.AddListener(OnExtraHint);
        }

        if (extraSkipButton != null)
        {
            extraSkipButton.onClick.RemoveAllListeners();
            extraSkipButton.onClick.AddListener(OnExtraSkip);
        }

        for (int i = 0; i < answerButtons.Length; i++)
        {
            int index = i;

            if (answerButtons[i] == null)
                continue;

            answerButtons[i].onClick.RemoveAllListeners();
            answerButtons[i].onClick.AddListener(() => SelectAnswer(index));
        }
    }

    void ResetQuestionPool()
    {
        questionPool.Clear();
        questionPool.AddRange(allQuestions);
        Shuffle(questionPool);
    }

    void NextQuestion()
    {
        if (gameOver)
            return;

        if (questionPool.Count <= 0)
            ResetQuestionPool();

        currentQuestion = questionPool[0];
        questionPool.RemoveAt(0);

        RefreshCurrentQuestion();
    }

    void RefreshCurrentQuestion()
    {
        if (currentQuestion == null)
            return;

        waitingNextQuestion = false;
        selectedAnswer = -1;
        correctAnswerIndex = -1;

        ResetButtons();

        string answerValue = currentQuestion.answers[screenLangIndex];
        string correctQuestion = GetOption(currentQuestion, optionLangIndex, 0);

        // İYİLEŞTİRME: Boş label varken baştaki ":" görünmesin.
        if (questionText != null)
            questionText.text = answerValue;

        // İYİLEŞTİRME: Aynı metinli şık varsa doğru cevabı kaybetmemek için
        // doğru şıkkı işaretleyerek karıştırıyoruz.
        List<KeyValuePair<string, bool>> built = new List<KeyValuePair<string, bool>>();

        for (int i = 0; i < 4; i++)
        {
            string option = GetOption(currentQuestion, optionLangIndex, i);

            if (string.IsNullOrWhiteSpace(option))
                continue;

            built.Add(new KeyValuePair<string, bool>(option, i == 0));
        }

        while (built.Count < 4)
            built.Add(new KeyValuePair<string, bool>("?", false));

        Shuffle(built);

        correctAnswerIndex = 0;

        for (int i = 0; i < 4; i++)
        {
            if (built[i].Value)
                correctAnswerIndex = i;

            if (answerTexts != null && i < answerTexts.Length && answerTexts[i] != null)
                answerTexts[i].text = built[i].Key;
        }

        if (feedbackText != null)
            feedbackText.text = "";

        if (submitButton != null)
            submitButton.interactable = true;

        StartCoroutine(QuestionPopAnim());
    }

    string GetOption(QuestionAnswerEntry entry, int langIndex, int optionIndex)
    {
        int index = langIndex * 4 + optionIndex;

        if (index < 0 || index >= entry.options.Length)
            return "";

        return entry.options[index];
    }

    void ResetButtons()
    {
        for (int i = 0; i < answerButtons.Length; i++)
        {
            if (answerButtons[i] == null)
                continue;

            answerButtons[i].interactable = true;
            answerButtons[i].transform.localScale = originalButtonScales[i];
            answerButtons[i].transform.localPosition = originalButtonPositions[i];

            if (answerButtons[i].image != null)
                answerButtons[i].image.color = FullAlpha(normalButtonColor);

            if (answerTexts != null && i < answerTexts.Length && answerTexts[i] != null)
                answerTexts[i].text = "";
        }
    }

    void SelectAnswer(int index)
    {
        if (gameOver || waitingNextQuestion)
            return;

        selectedAnswer = index;

        for (int i = 0; i < answerButtons.Length; i++)
        {
            if (answerButtons[i] == null)
                continue;

            if (answerButtons[i].image != null)
                answerButtons[i].image.color = FullAlpha(normalButtonColor);

            answerButtons[i].transform.localScale = originalButtonScales[i];
        }

        if (answerButtons[index].image != null)
            answerButtons[index].image.color = FullAlpha(selectedButtonColor);

        answerButtons[index].transform.localScale = originalButtonScales[index] * 0.94f;
    }

    void OnSubmit()
    {
        if (gameOver || waitingNextQuestion)
            return;

        if (selectedAnswer < 0)
        {
            ShowFeedback(GetText("choose"), wrongButtonColor);
            return;
        }

        waitingNextQuestion = true;

        if (submitButton != null)
            submitButton.interactable = false;

        for (int i = 0; i < answerButtons.Length; i++)
        {
            if (answerButtons[i] != null)
                answerButtons[i].interactable = false;
        }

        if (selectedAnswer == correctAnswerIndex)
            CorrectAnswer();
        else
            WrongAnswer();

        UpdateScoreUI();
        UpdateComboUI();
        SaveProgressOnly();

        StartCoroutine(NextQuestionDelay());
    }

    void CorrectAnswer()
    {
        if (answerButtons[selectedAnswer].image != null)
            answerButtons[selectedAnswer].image.color = FullAlpha(correctButtonColor);

        combo++;
        correctCount++;

        if (combo > bestComboThisRun)
            bestComboThisRun = combo;

        int earned = Mathf.RoundToInt(basePoints * GetComboMultiplier(combo));

        score += earned;
        timeLeft += correctTimeBonus;

        ShowFeedback(GetText("correct") + " +" + earned, correctButtonColor);
        StartCoroutine(ButtonPop(answerButtons[selectedAnswer]));
    }

    void WrongAnswer()
    {
        if (answerButtons[selectedAnswer].image != null)
            answerButtons[selectedAnswer].image.color = FullAlpha(wrongButtonColor);

        if (correctAnswerIndex >= 0 && correctAnswerIndex < answerButtons.Length)
        {
            if (answerButtons[correctAnswerIndex].image != null)
                answerButtons[correctAnswerIndex].image.color = FullAlpha(correctButtonColor);
        }

        wrongCount++;
        combo = 0;

        score -= wrongPenalty;

        if (score < 0)
            score = 0;

        string correctText = "";

        if (correctAnswerIndex >= 0 && correctAnswerIndex < answerTexts.Length && answerTexts[correctAnswerIndex] != null)
            correctText = answerTexts[correctAnswerIndex].text;

        ShowFeedback(GetText("wrong") + "\n" + GetText("correctQuestion") + ": " + correctText, wrongButtonColor);
    }

    IEnumerator NextQuestionDelay()
    {
        yield return new WaitForSeconds(nextQuestionDelay);

        if (!gameOver)
            NextQuestion();
    }

    void OnExtraTime()
    {
        if (!extraTimeReady || gameOver)
            return;

        timeLeft += extraTimeAmount;
        extraTimeReady = false;

        if (extraTimeButton != null)
            extraTimeButton.interactable = false;

        StartCoroutine(Cooldown(extraTimeCooldownText, extraTimeButton, () => extraTimeReady = true));
    }

    void OnExtraHint()
    {
        if (!extraHintReady || gameOver || waitingNextQuestion)
            return;

        int removed = 0;

        for (int i = 0; i < answerButtons.Length && removed < 2; i++)
        {
            if (i == correctAnswerIndex)
                continue;

            if (i == selectedAnswer)
                continue;

            if (answerButtons[i] == null)
                continue;

            if (!answerButtons[i].interactable)
                continue;

            answerButtons[i].interactable = false;

            if (answerButtons[i].image != null)
                answerButtons[i].image.color = FullAlpha(disabledButtonColor);

            if (answerTexts != null && i < answerTexts.Length && answerTexts[i] != null)
                answerTexts[i].text = "—";

            removed++;
        }

        extraHintReady = false;

        if (extraHintButton != null)
            extraHintButton.interactable = false;

        StartCoroutine(Cooldown(extraHintCooldownText, extraHintButton, () => extraHintReady = true));
    }

    void OnExtraSkip()
    {
        if (!extraSkipReady || gameOver || waitingNextQuestion)
            return;

        combo = 0;
        UpdateComboUI();

        ShowFeedback(GetText("skipped"), Color.white);

        NextQuestion();

        extraSkipReady = false;

        if (extraSkipButton != null)
            extraSkipButton.interactable = false;

        StartCoroutine(Cooldown(extraSkipCooldownText, extraSkipButton, () => extraSkipReady = true));
    }

    IEnumerator Cooldown(TMP_Text label, Button button, System.Action done)
    {
        float t = cooldownDuration;

        if (label != null)
            label.gameObject.SetActive(true);

        while (t > 0)
        {
            if (label != null)
                label.text = Mathf.CeilToInt(t).ToString();

            t -= Time.deltaTime;
            yield return null;
        }

        if (label != null)
        {
            label.text = "";
            label.gameObject.SetActive(false);
        }

        if (button != null)
            button.interactable = true;

        done?.Invoke();
    }

    void SaveProgressOnly()
    {
        PlayerPrefs.SetInt("Mod21Skor", score);
        PlayerPrefs.SetInt("Mod21Score", score);
        PlayerPrefs.SetInt("Mod21Correct", correctCount);
        PlayerPrefs.SetInt("Mod21Wrong", wrongCount);

        PlayerPrefs.SetInt(modKey + "_LastScore", score);
        PlayerPrefs.SetInt(modKey + "_Correct", correctCount);
        PlayerPrefs.SetInt(modKey + "_Wrong", wrongCount);
        PlayerPrefs.SetInt(modKey + "_LastCombo", combo);
        PlayerPrefs.SetInt(modKey + "_BestComboRun", bestComboThisRun);
        PlayerPrefs.SetInt(modKey + "_LastTimeLeft", Mathf.CeilToInt(timeLeft));

        int total = correctCount + wrongCount;
        int accuracy = total > 0 ? Mathf.RoundToInt((correctCount / (float)total) * 100f) : 0;

        PlayerPrefs.SetInt(modKey + "_LastAccuracy", accuracy);

        if (score > PlayerPrefs.GetInt(modKey + "_MaxScore", 0))
            PlayerPrefs.SetInt(modKey + "_MaxScore", score);

        if (score > PlayerPrefs.GetInt("Mod21LeaderScore", 0))
            PlayerPrefs.SetInt("Mod21LeaderScore", score);

        if (score > PlayerPrefs.GetInt("Mod21BestScore", 0))
            PlayerPrefs.SetInt("Mod21BestScore", score);

        if (bestComboThisRun > PlayerPrefs.GetInt(modKey + "_BestCombo", 0))
            PlayerPrefs.SetInt(modKey + "_BestCombo", bestComboThisRun);

        PlayerPrefs.Save();
    }

    void GameOver()
    {
        if (gameOver)
            return;

        gameOver = true;

        SaveProgressOnly();

        PlayerPrefs.SetString("LastPlayedMod", modKey);

        PlayerPrefs.SetInt(modKey + "_TotalCorrect", PlayerPrefs.GetInt(modKey + "_TotalCorrect", 0) + correctCount);
        PlayerPrefs.SetInt(modKey + "_TotalWrong", PlayerPrefs.GetInt(modKey + "_TotalWrong", 0) + wrongCount);
        PlayerPrefs.SetInt(modKey + "_PlayCount", PlayerPrefs.GetInt(modKey + "_PlayCount", 0) + 1);
        PlayerPrefs.SetInt("TotalScore", PlayerPrefs.GetInt("TotalScore", 0) + score);

        PlayerPrefs.Save();

        SceneManager.LoadScene(resultSceneName);
    }

    void UpdateScoreUI()
    {
        if (scoreText != null)
            scoreText.text = score.ToString();
    }

    void UpdateComboUI()
    {
        if (comboText != null)
            comboText.text = combo + "x";
    }

    void UpdateTimerUI()
    {
        if (timerText == null)
            return;

        timerText.text = Mathf.CeilToInt(timeLeft).ToString();

        if (timeLeft <= 10f)
            timerText.color = Color.red;
        else
            timerText.color = Color.white;
    }

    void ShowFeedback(string msg, Color color)
    {
        if (feedbackText == null)
            return;

        feedbackText.text = msg;
        feedbackText.color = FullAlpha(color);

        StopCoroutine(nameof(FeedbackAnim));
        StartCoroutine(nameof(FeedbackAnim));
    }

    float GetComboMultiplier(int c)
    {
        if (c >= 8)
            return mult_8plus;

        if (c >= 5)
            return mult_5to7;

        if (c >= 3)
            return mult_3to4;

        return mult_1to2;
    }

    IEnumerator FeedbackAnim()
    {
        if (feedbackText == null)
            yield break;

        Vector3 normal = Vector3.one;
        Vector3 big = Vector3.one * 1.15f;

        feedbackText.transform.localScale = normal;

        float t = 0;

        while (t < 1)
        {
            t += Time.deltaTime / 0.15f;
            feedbackText.transform.localScale = Vector3.Lerp(normal, big, t);
            yield return null;
        }

        t = 0;

        while (t < 1)
        {
            t += Time.deltaTime / 0.15f;
            feedbackText.transform.localScale = Vector3.Lerp(big, normal, t);
            yield return null;
        }

        feedbackText.transform.localScale = normal;
    }

    IEnumerator ButtonPop(Button btn)
    {
        if (btn == null)
            yield break;

        Vector3 normal = btn.transform.localScale;
        Vector3 big = normal * 1.12f;

        float t = 0;

        while (t < 1)
        {
            t += Time.deltaTime / 0.12f;
            btn.transform.localScale = Vector3.Lerp(normal, big, t);
            yield return null;
        }

        t = 0;

        while (t < 1)
        {
            t += Time.deltaTime / 0.12f;
            btn.transform.localScale = Vector3.Lerp(big, normal, t);
            yield return null;
        }

        btn.transform.localScale = normal;
    }

    IEnumerator QuestionPopAnim()
    {
        if (questionText == null)
            yield break;

        Vector3 normal = Vector3.one;
        Vector3 small = Vector3.one * 0.92f;

        questionText.transform.localScale = small;

        float t = 0;

        while (t < 1)
        {
            t += Time.deltaTime / 0.18f;
            questionText.transform.localScale = Vector3.Lerp(small, normal, t);
            yield return null;
        }

        questionText.transform.localScale = normal;
    }

    Color FullAlpha(Color c)
    {
        c.a = 1f;
        return c;
    }

    void Shuffle<T>(List<T> list)
    {
        for (int i = 0; i < list.Count; i++)
        {
            int rnd = Random.Range(i, list.Count);

            T temp = list[i];
            list[i] = list[rnd];
            list[rnd] = temp;
        }
    }
}