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

public class SpeedReview30Mod : MonoBehaviour
{
    [Header("DATA")]
    public TextAsset wordFile;
    public string wordsResourcePath = "Mod30SpeedReviewWords";

    [Header("MAIN TEXTS")]
    [Tooltip("Ekrandaki ana soru burada gösterilecek.")]
    public TMP_Text questionText;

    [Tooltip("Kısa görev açıklaması burada gösterilecek.")]
    public TMP_Text instructionText;

    [Header("UI 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;
    public TMP_Text speedBonusText;

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

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

    [Header("SCENES")]
    public string backSceneName = "modsec 30";
    public string resultSceneName = "modres 30";

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

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

    [Header("SPEED REVIEW SETTINGS")]
    [Tooltip("Speed Review modu sabit 30 saniye için tasarlandı.")]
    public float startTime = 30f;

    public int basePoints = 50;
    public int wrongPenalty = 0;
    public float nextQuestionDelay = 0.45f;

    [Header("SPEED BONUS")]
    [Tooltip("Bu süreden hızlı cevap verilirse büyük hız bonusu gelir.")]
    public float perfectSpeedTime = 2f;

    [Tooltip("Bu süreden hızlı cevap verilirse küçük hız bonusu gelir.")]
    public float goodSpeedTime = 4f;

    public int perfectSpeedBonus = 30;
    public int goodSpeedBonus = 15;

    [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[] langNames = { "Türkçe", "English", "Español", "Deutsch", "Français", "Português" };

    const string modKey = "Mod30";

    class SpeedEntry
    {
        public string[] questions = new string[6];
        public string[] instructions = new string[6];

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

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

    SpeedEntry currentQuestion;

    int questionLangIndex = 1;
    int answerLangIndex = 0;

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

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

    float timeLeft;
    float questionStartTime;

    bool gameOver = false;
    bool waitingNextQuestion = false;

    Vector3[] originalButtonScales;
    Vector3[] originalButtonPositions;

    void Awake()
    {
        LoadQuestions();
    }

    void Start()
    {
        ResolveLanguages();

        // Speed Review mantığı: sabit 30 saniye.
        timeLeft = startTime;

        if (timeLeft <= 0f)
            timeLeft = 30f;

        if (allQuestions.Count < 1)
        {
            Debug.LogError("Mod30 Speed Review: En az 1 geçerli TXT satırı gerekli. Yüklenen soru sayısı: " + allQuestions.Count);
            enabled = false;
            return;
        }

        if (questionText == null)
        {
            Debug.LogError("Mod30 Speed Review: questionText atanmadı.");
            enabled = false;
            return;
        }

        if (answerButtons == null || answerButtons.Length < 4 || answerTexts == null || answerTexts.Length < 4)
        {
            Debug.LogError("Mod30 Speed Review: 4 answerButtons ve 4 answerTexts atanmalı.");
            enabled = false;
            return;
        }

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

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

        NextQuestion();

        Debug.Log("Mod30 Soru Dili: " + questionLangIndex + " / " + langNames[questionLangIndex]);
        Debug.Log("Mod30 Şık Dili: " + answerLangIndex + " / " + langNames[answerLangIndex]);
    }

    void Update()
    {
        if (gameOver)
            return;

        timeLeft -= Time.deltaTime;

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

        UpdateTimerUI();
    }

    // TXT FORMAT:
    // 0-5 soru:
    // trQuestion|enQuestion|esQuestion|deQuestion|frQuestion|ptQuestion
    //
    // 6-11 görev / açıklama:
    // trInstruction|enInstruction|esInstruction|deInstruction|frInstruction|ptInstruction
    //
    // 12-35 cevap 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("Mod30 Speed Review: TXT bulunamadı. Şuraya koy: Assets/Resources/" + wordsResourcePath + ".txt");
            return;
        }

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

        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 < 36)
            {
                Debug.LogWarning("Mod30 Speed Review TXT eksik satır atlandı. Satır: " + (i + 1) + " Alan sayısı: " + p.Length);
                continue;
            }

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

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

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

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

            for (int q = 0; q < 24; q++)
            {
                entry.options[q] = CleanField(p[12 + q]);

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

            if (valid)
                allQuestions.Add(entry);
        }

        Debug.Log("Mod30 Speed Review yüklenen soru sayısı: " + allQuestions.Count);
    }

    string[] SplitLineSmart(string line)
    {
        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().Replace("\\n", "\n").Replace("[blank]", "____");
    }

    void ResolveLanguages()
    {
        if (forcedQuestionLanguageIndex >= 0 && forcedQuestionLanguageIndex <= 5)
            questionLangIndex = forcedQuestionLanguageIndex;
        else
            questionLangIndex = PlayerPrefs.GetInt("QuestionLangID", 1);

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

        questionLangIndex = ClampLanguage(questionLangIndex, 1);
        answerLangIndex = ClampLanguage(answerLangIndex, 0);
    }

    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;

        questionLangIndex = 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;

        answerLangIndex = 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 =
                "SORU: " + langNames[questionLangIndex] +
                " | CEVAP: " + langNames[answerLangIndex];
        }

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

    string GetTitleText()
    {
        switch (answerLangIndex)
        {
            case 0: return "Hızlı Tekrar";
            case 1: return "Speed Review";
            case 2: return "Repaso rápido";
            case 3: return "Schnelle Wiederholung";
            case 4: return "Révision rapide";
            case 5: return "Revisão rápida";
            default: return "Speed Review";
        }
    }

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

        if (key == "choose")
        {
            if (lang == 0) return "BİR CEVAP SEÇ";
            if (lang == 1) return "CHOOSE AN ANSWER";
            if (lang == 2) return "ELIGE UNA RESPUESTA";
            if (lang == 3) return "WÄHLE EINE ANTWORT";
            if (lang == 4) return "CHOISIS UNE RÉPONSE";
            if (lang == 5) return "ESCOLHA UMA RESPOSTA";
        }

        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 == "correctAnswer")
        {
            if (lang == 0) return "Doğru cevap";
            if (lang == 1) return "Correct answer";
            if (lang == 2) return "Respuesta correcta";
            if (lang == 3) return "Richtige Antwort";
            if (lang == 4) return "Bonne réponse";
            if (lang == 5) return "Resposta correta";
        }

        if (key == "speed")
        {
            if (lang == 0) return "HIZ BONUSU";
            if (lang == 1) return "SPEED BONUS";
            if (lang == 2) return "BONO DE VELOCIDAD";
            if (lang == 3) return "TEMPOBONUS";
            if (lang == 4) return "BONUS DE VITESSE";
            if (lang == 5) return "BÔNUS DE VELOCIDADE";
        }

        if (key == "noSpeed")
        {
            if (lang == 0) return "Hız bonusu yok";
            if (lang == 1) return "No speed bonus";
            if (lang == 2) return "Sin bono de velocidad";
            if (lang == 3) return "Kein Tempobonus";
            if (lang == 4) return "Pas de bonus de vitesse";
            if (lang == 5) return "Sem bônus de velocidade";
        }

        return key;
    }

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

        if (instructionText != null)
        {
            instructionText.alignment = TextAlignmentOptions.Center;
            instructionText.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);
        }
    }

    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);
            });
        }

        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;
        lastSpeedBonus = 0;

        ResetButtons();

        string questionValue = currentQuestion.questions[questionLangIndex];
        string instructionValue = currentQuestion.instructions[questionLangIndex];
        string correctAnswer = GetOption(currentQuestion, answerLangIndex, 0);

        if (questionText != null)
            questionText.text = questionValue;

        if (instructionText != null)
            instructionText.text = instructionValue;

        List<string> options = new List<string>();

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

            if (!string.IsNullOrWhiteSpace(option))
                options.Add(option);
        }

        while (options.Count < 4)
            options.Add("?");

        Shuffle(options);

        correctAnswerIndex = options.IndexOf(correctAnswer);

        if (correctAnswerIndex < 0)
            correctAnswerIndex = 0;

        for (int i = 0; i < 4; i++)
        {
            if (answerTexts != null && i < answerTexts.Length && answerTexts[i] != null)
                answerTexts[i].text = options[i];
        }

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

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

        questionStartTime = Time.time;

        UpdateSpeedBonusUI();
        StartCoroutine(QuestionPopAnim());
    }

    string GetOption(SpeedEntry 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();
        UpdateSpeedBonusUI();
        SaveProgressOnly();

        StartCoroutine(NextQuestionDelay());
    }

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

        combo++;
        correctCount++;

        if (combo > bestComboThisRun)
            bestComboThisRun = combo;

        float answerTime = Time.time - questionStartTime;
        lastSpeedBonus = CalculateSpeedBonus(answerTime);
        totalSpeedBonus += lastSpeedBonus;

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

        score += earned;

        string bonusText = "";

        if (lastSpeedBonus > 0)
            bonusText = "\n" + GetText("speed") + " +" + lastSpeedBonus;
        else
            bonusText = "\n" + GetText("noSpeed");

        ShowFeedback(GetText("correct") + " +" + earned + bonusText, 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;
        lastSpeedBonus = 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("correctAnswer") + ": " + correctText, wrongButtonColor);
    }

    int CalculateSpeedBonus(float answerTime)
    {
        if (answerTime <= perfectSpeedTime)
            return perfectSpeedBonus;

        if (answerTime <= goodSpeedTime)
            return goodSpeedBonus;

        return 0;
    }

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

        if (!gameOver)
            NextQuestion();
    }

    void SaveProgressOnly()
    {
        PlayerPrefs.SetInt("Mod30Skor", score);
        PlayerPrefs.SetInt("Mod30Score", score);
        PlayerPrefs.SetInt("Mod30Correct", correctCount);
        PlayerPrefs.SetInt("Mod30Wrong", wrongCount);
        PlayerPrefs.SetInt("Mod30SpeedBonus", totalSpeedBonus);

        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));
        PlayerPrefs.SetInt(modKey + "_TotalSpeedBonus", totalSpeedBonus);

        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("Mod30LeaderScore", 0))
            PlayerPrefs.SetInt("Mod30LeaderScore", score);

        if (score > PlayerPrefs.GetInt("Mod30BestScore", 0))
            PlayerPrefs.SetInt("Mod30BestScore", 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 + "_TotalSpeedBonusAllTime", PlayerPrefs.GetInt(modKey + "_TotalSpeedBonusAllTime", 0) + totalSpeedBonus);
        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 UpdateSpeedBonusUI()
    {
        if (speedBonusText != null)
            speedBonusText.text = "+" + lastSpeedBonus;
    }

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

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

        if (timeLeft <= 5f)
            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 / 0.15f;
            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;
        }
    }
}