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

public class ClozeGameScene : MonoBehaviour
{
    [Header("TXT DOSYASI (6 Dil)")]
    public TextAsset questionFile;

    [Header("UI")]
    public TMP_Text questionText;
    public TMP_Text[] answerTexts;
    public Button[] answerButtons;
    public Button submitButton;

    public TMP_Text scoreText;
    public TMP_Text comboText;
    public TMP_Text timerText;
    public TMP_Text feedbackText;

    [Header("EXTRA BUTTONS")]
    public Button extraTimeButton;
    public Button extraHintButton;
    public Button extraSkipButton;

    [Header("━━━ BACK BUTTON ━━━━━━━━━━━━━━━━━━━━━━━━")]
    public Button backButton;
    public string backSceneName = "ModSec 4";

    [Header("RENKLER")]
    public Color normalColor = new Color32(255, 255, 255, 255);
    public Color selectedColor = new Color32(60, 110, 200, 255);
    public Color correctColor = new Color32(0, 200, 0, 255);
    public Color wrongColor = new Color32(200, 0, 0, 255);
    public Color hintColor = new Color32(255, 255, 128, 255);

    [Header("━━━ FEEDBACK TEXT SETTINGS ━━━━━━━━━━━━━")]
    public bool feedbackOnTop = true;
    public float feedbackTopY = 400f;
    public float feedbackFontSize = 72f;

    [Header("━━━ ANIMATION SETTINGS ━━━━━━━━━━━━━━━━━")]
    [Range(0.80f, 1f)] public float selectedScale = 0.94f;
    public float selectAnimTime = 0.10f;
    public float enterAnimTime = 0.22f;

    // ---------------- INTERNAL STATE ----------------
    private class ClozeEntry
    {
        public string[] q = new string[6];
        public string[] c = new string[6];
        public string[] w1 = new string[6];
        public string[] w2 = new string[6];
        public string[] w3 = new string[6];
    }

    private List<ClozeEntry> questions = new List<ClozeEntry>();

    private int selected = -1;
    private int correctIndex = -1;
    private int lastQuestionID = -1;

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

    private float timeLeft = 60f;
    private float nextDelay = 1.2f;

    private bool locked = false;
    private string lang;

    private string modKey = "Mod4";  // ✅ Bu modun özel key'i

    readonly Color timerNormalColor = Color.white;
    readonly Color timerWarnColor = new Color32(255, 80, 80, 255);

    Vector3[] originalButtonScales;
    Vector3[] originalButtonPositions;
    Coroutine[] buttonScaleCoroutines;
    Coroutine[] buttonEnterCoroutines;

    // ------------------------------------------------
    void Start()
    {
        lang = PlayerPrefs.GetString("QuestionLangCode", "en");

        if (questionFile == null)
        {
            Debug.LogError("TXT Dosyası atanmadı!");
            return;
        }

        LoadTXT(questionFile.text);

        CacheButtonData();
        ForceButtonTransitionNone();
        PrepareFeedbackText();

        submitButton.onClick.AddListener(OnSubmit);
        extraTimeButton.onClick.AddListener(() => { if (!locked) timeLeft += 5; });
        extraHintButton.onClick.AddListener(OnHint);
        extraSkipButton.onClick.AddListener(() => NextQuestion());

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

        scoreText.text = "0";
        comboText.text = "0x";
        feedbackText.text = "";

        NextQuestion();
    }

    // ------------------------------------------------
    void Update()
    {
        if (!locked)
        {
            timeLeft -= Time.deltaTime;
            if (timeLeft <= 0)
            {
                timeLeft = 0;
                GameOver();
            }
        }

        UpdateTimerUI();
    }

    // ------------------------------------------------
    void CacheButtonData()
    {
        if (answerButtons == null) return;

        int len = answerButtons.Length;
        originalButtonScales = new Vector3[len];
        originalButtonPositions = new Vector3[len];
        buttonScaleCoroutines = new Coroutine[len];
        buttonEnterCoroutines = new Coroutine[len];

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

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

    void ForceButtonTransitionNone()
    {
        if (answerButtons == null) return;

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

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

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

    void PrepareFeedbackText()
    {
        if (feedbackText == null) return;

        if (feedbackOnTop)
        {
            Vector3 pos = feedbackText.transform.localPosition;
            pos.y = feedbackTopY;
            feedbackText.transform.localPosition = pos;
        }

        feedbackText.alignment = TextAlignmentOptions.Center;
        feedbackText.fontSize = Mathf.Max(feedbackText.fontSize, feedbackFontSize);
        feedbackText.text = "";

        Color c = feedbackText.color;
        c.a = 1f;
        feedbackText.color = c;
    }

    // ------------------------------------------------
    void LoadTXT(string raw)
    {
        foreach (string line in raw.Trim().Split('\n'))
        {
            if (string.IsNullOrWhiteSpace(line)) continue;

            string[] p = line.Split('|');
            if (p.Length < 30)
            {
                Debug.LogWarning("Eksik satır: " + line);
                continue;
            }

            ClozeEntry e = new ClozeEntry();

            for (int i = 0; i < 6; i++)
            {
                e.q[i] = p[i].Trim();
                e.c[i] = p[6 + i].Trim();
                e.w1[i] = p[12 + i].Trim();
                e.w2[i] = p[18 + i].Trim();
                e.w3[i] = p[24 + i].Trim();
            }

            questions.Add(e);
        }
    }

    // ------------------------------------------------
    void NextQuestion()
    {
        locked = false;
        feedbackText.text = "";
        selected = -1;

        ResetButtons();

        // Aynı soru ard arda gelmesin
        int id = Random.Range(0, questions.Count);
        if (id == lastQuestionID && questions.Count > 1)
            id = (id + 1) % questions.Count;

        lastQuestionID = id;

        ClozeEntry q = questions[id];
        int L = GetLangIndex();

        questionText.text = q.q[L];
        StartCoroutine(FadeInText(questionText));

        List<string> opts = new List<string>()
        {
            q.c[L], q.w1[L], q.w2[L], q.w3[L]
        };

        Shuffle(opts);

        // Şık yerleşimi
        correctIndex = opts.IndexOf(q.c[L]);

        for (int i = 0; i < 4; i++)
        {
            answerTexts[i].text = opts[i];
            int index = i;

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

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

            if (buttonEnterCoroutines[i] != null)
                StopCoroutine(buttonEnterCoroutines[i]);

            buttonEnterCoroutines[i] = StartCoroutine(ButtonEnterAnim(answerButtons[i], i));
        }
    }

    // ------------------------------------------------
    void ResetButtons()
    {
        if (answerButtons == null) return;

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

            StopButtonCoroutines(i);

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

            Image img = answerButtons[i].image;
            if (img != null)
                img.color = FullAlpha(normalColor);

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

    // ------------------------------------------------
    void SelectAnswer(int id)
    {
        if (locked) return;

        if (selected == id)
            return;

        if (selected >= 0 && selected < answerButtons.Length)
        {
            Button oldButton = answerButtons[selected];

            if (oldButton != null)
            {
                Image oldImg = oldButton.image;
                if (oldImg != null)
                    oldImg.color = FullAlpha(normalColor);

                StartScaleAnim(selected, originalButtonScales[selected]);
            }
        }

        selected = id;

        Image img = answerButtons[id].image;
        if (img != null)
            img.color = FullAlpha(selectedColor);

        StartScaleAnim(id, originalButtonScales[id] * selectedScale);
    }

    // ------------------------------------------------
    void OnSubmit()
    {
        if (selected == -1 || locked) return;
        locked = true;

        foreach (Button b in answerButtons)
            b.interactable = false;

        bool ok = (selected == correctIndex);

        if (ok)
        {
            correctCount++;
            combo++;
            score += 50 + combo * 10;

            Image img = answerButtons[selected].image;
            if (img != null)
                img.color = FullAlpha(correctColor);

            StartCoroutine(CorrectPulse(answerButtons[selected], selected));

            feedbackText.color = FullAlpha(correctColor);
            feedbackText.text = combo >= 3 ? $"TRUE   {combo}x COMBO!" : "TRUE";

            timeLeft += 2f;

            if (comboText != null) StartCoroutine(ComboAnim(comboText));
            if (scoreText != null) StartCoroutine(ScorePopAnim(scoreText));
        }
        else
        {
            wrongCount++;
            combo = 0;

            Image selImg = answerButtons[selected].image;
            if (selImg != null)
                selImg.color = FullAlpha(wrongColor);

            StartCoroutine(ShakeButton(answerButtons[selected], selected));

            Image corImg = answerButtons[correctIndex].image;
            if (corImg != null)
                corImg.color = FullAlpha(correctColor);

            StartScaleAnim(correctIndex, originalButtonScales[correctIndex] * 1.04f);

            feedbackText.color = FullAlpha(wrongColor);
            feedbackText.text = "FALSE";
        }

        scoreText.text = score.ToString();
        comboText.text = combo + "x";

        if (feedbackOnTop)
        {
            Vector3 pos = feedbackText.transform.localPosition;
            pos.y = feedbackTopY;
            feedbackText.transform.localPosition = pos;
        }

        StartCoroutine(FeedbackAnim(feedbackText));

        StartCoroutine(NextDelay());
    }


    IEnumerator NextDelay()
    {
        yield return new WaitForSeconds(nextDelay);
        NextQuestion();
    }


    // ------------------------------------------------
    void OnHint()
    {
        if (locked) return;

        Image img = answerButtons[correctIndex].image;
        if (img != null)
            img.color = FullAlpha(hintColor);

        StartCoroutine(CorrectPulse(answerButtons[correctIndex], correctIndex));

        feedbackText.color = FullAlpha(selectedColor);
        feedbackText.text = "Hint: Correct Answer Highlighted!";

        if (feedbackOnTop)
        {
            Vector3 pos = feedbackText.transform.localPosition;
            pos.y = feedbackTopY;
            feedbackText.transform.localPosition = pos;
        }

        StartCoroutine(FeedbackAnim(feedbackText));
    }

    // ------------------------------------------------
    void GameOver()
    {
        PlayerPrefs.SetString("LastPlayedMod", modKey);

        // 🔥 Mod Select / Leaderboard ekranına direkt bağlanacak basit key
        PlayerPrefs.SetInt("Mod4Skor", score);

        // Bu oyundaki sonuçlar
        PlayerPrefs.SetInt(modKey + "_LastScore", score);
        PlayerPrefs.SetInt(modKey + "_Correct", correctCount);
        PlayerPrefs.SetInt(modKey + "_Wrong", wrongCount);
        PlayerPrefs.SetInt(modKey + "_LastCombo", combo);

        // 🔥 En iyi skor (Mod Select / Leaderboard için)
        int oldMax = PlayerPrefs.GetInt(modKey + "_MaxScore", 0);
        if (score > oldMax)
            PlayerPrefs.SetInt(modKey + "_MaxScore", score);

        // 🔥 En iyi combo
        int oldBestCombo = PlayerPrefs.GetInt(modKey + "_BestCombo", 0);
        if (combo > oldBestCombo)
            PlayerPrefs.SetInt(modKey + "_BestCombo", combo);

        // 🔥 Doğruluk oranı (%)
        int totalAnswers = correctCount + wrongCount;
        int accuracy = totalAnswers > 0 ? Mathf.RoundToInt((correctCount / (float)totalAnswers) * 100f) : 0;
        PlayerPrefs.SetInt(modKey + "_LastAccuracy", accuracy);

        // 🔥 Toplam istatistikler
        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);

        // 🔥 Genel toplam skor (Mod Select ekranındaki global leaderboard için)
        PlayerPrefs.SetInt("TotalScore", PlayerPrefs.GetInt("TotalScore", 0) + score);

        PlayerPrefs.Save();

        SceneManager.LoadScene("Mod4Resume");
    }

    // ------------------------------------------------
    int GetLangIndex()
    {
        return lang switch
        {
            "tr" => 0,
            "en" => 1,
            "es" => 2,
            "de" => 3,
            "fr" => 4,
            "pt" => 5,
            _ => 1
        };
    }

    // ------------------------------------------------
    void Shuffle<T>(IList<T> arr)
    {
        for (int i = 0; i < arr.Count; i++)
        {
            int r = Random.Range(i, arr.Count);
            (arr[i], arr[r]) = (arr[r], arr[i]);
        }
    }

    // ================== ANIMATION HELPERS ==================

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

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

        if (timeLeft <= 10f)
        {
            timerText.color = FullAlpha(Color.Lerp(timerWarnColor, Color.white, Mathf.PingPong(Time.time * 3f, 1f)));
            timerText.transform.localScale = Vector3.one * (1f + Mathf.Sin(Time.time * 10f) * 0.05f);
        }
        else
        {
            timerText.color = FullAlpha(timerNormalColor);
            timerText.transform.localScale = Vector3.one;
        }
    }

    void StartScaleAnim(int index, Vector3 targetScale)
    {
        if (index < 0 || index >= answerButtons.Length) return;
        if (answerButtons[index] == null) return;

        if (buttonScaleCoroutines[index] != null)
            StopCoroutine(buttonScaleCoroutines[index]);

        buttonScaleCoroutines[index] = StartCoroutine(ScaleButton(answerButtons[index], targetScale));
    }

    void StopButtonCoroutines(int index)
    {
        if (buttonScaleCoroutines != null && index < buttonScaleCoroutines.Length && buttonScaleCoroutines[index] != null)
        {
            StopCoroutine(buttonScaleCoroutines[index]);
            buttonScaleCoroutines[index] = null;
        }

        if (buttonEnterCoroutines != null && index < buttonEnterCoroutines.Length && buttonEnterCoroutines[index] != null)
        {
            StopCoroutine(buttonEnterCoroutines[index]);
            buttonEnterCoroutines[index] = null;
        }
    }

    IEnumerator ScaleButton(Button btn, Vector3 targetScale)
    {
        if (btn == null) yield break;

        Vector3 startScale = btn.transform.localScale;
        float t = 0f;

        while (t < 1f)
        {
            t += Time.deltaTime / Mathf.Max(0.01f, selectAnimTime);
            btn.transform.localScale = Vector3.Lerp(startScale, targetScale, EaseOutQuad(t));
            yield return null;
        }

        btn.transform.localScale = targetScale;
    }

    IEnumerator ButtonEnterAnim(Button btn, int delayIndex)
    {
        if (btn == null) yield break;

        int idx = System.Array.IndexOf(answerButtons, btn);
        if (idx < 0) yield break;

        yield return new WaitForSeconds(delayIndex * 0.06f);

        Vector3 targetPos = originalButtonPositions[idx];
        Vector3 startPos = targetPos + Vector3.up * 35f;

        Vector3 targetScale = originalButtonScales[idx];
        Vector3 startScale = targetScale * 0.85f;

        btn.transform.localPosition = startPos;
        btn.transform.localScale = startScale;

        float t = 0f;

        while (t < 1f)
        {
            t += Time.deltaTime / Mathf.Max(0.01f, enterAnimTime);

            float ease = EaseOutBack(t);

            btn.transform.localPosition = Vector3.Lerp(startPos, targetPos, ease);
            btn.transform.localScale = Vector3.Lerp(startScale, targetScale, ease);

            yield return null;
        }

        btn.transform.localPosition = targetPos;
        btn.transform.localScale = targetScale;
    }

    IEnumerator CorrectPulse(Button btn, int idx)
    {
        if (btn == null) yield break;

        Vector3 normal = originalButtonScales[idx];
        Vector3 big = normal * 1.12f;

        float t = 0f;

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

        t = 0f;

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

        btn.transform.localScale = normal;
    }

    IEnumerator ShakeButton(Button btn, int idx)
    {
        if (btn == null) yield break;

        Vector3 origin = originalButtonPositions[idx];

        float duration = 0.35f;
        float magnitude = 12f;
        float elapsed = 0f;

        while (elapsed < duration)
        {
            float power = 1f - elapsed / duration;
            float x = Random.Range(-1f, 1f) * magnitude * power;

            btn.transform.localPosition = origin + new Vector3(x, 0f, 0f);

            elapsed += Time.deltaTime;
            yield return null;
        }

        btn.transform.localPosition = origin;
    }

    IEnumerator FeedbackAnim(TMP_Text txt)
    {
        if (txt == null) yield break;

        Vector3 originalScale = txt.transform.localScale;
        Vector3 bigScale = originalScale * 1.18f;

        Color c = FullAlpha(txt.color);
        c.a = 0f;
        txt.color = c;

        Vector3 originalPos = txt.transform.localPosition;
        Vector3 startPos = originalPos + Vector3.down * 18f;

        txt.transform.localPosition = startPos;

        float t = 0f;

        while (t < 1f)
        {
            t += Time.deltaTime / 0.16f;

            float ease = EaseOutBack(t);

            txt.transform.localScale = Vector3.Lerp(originalScale, bigScale, ease);
            txt.transform.localPosition = Vector3.Lerp(startPos, originalPos, ease);

            c.a = Mathf.Clamp01(t);
            txt.color = c;

            yield return null;
        }

        c.a = 1f;
        txt.color = c;
        txt.transform.localPosition = originalPos;

        t = 0f;

        while (t < 1f)
        {
            t += Time.deltaTime / 0.12f;
            txt.transform.localScale = Vector3.Lerp(bigScale, originalScale, EaseOutQuad(t));
            yield return null;
        }

        txt.transform.localScale = originalScale;
    }

    IEnumerator ComboAnim(TMP_Text txt)
    {
        if (txt == null) yield break;

        Vector3 original = txt.transform.localScale;
        Vector3 big = original * 1.22f;

        Color baseColor = FullAlpha(txt.color);
        Color highlight = new Color32(255, 220, 50, 255);

        float t = 0f;

        while (t < 1f)
        {
            t += Time.deltaTime / 0.12f;

            txt.transform.localScale = Vector3.Lerp(original, big, EaseOutBack(t));
            txt.color = FullAlpha(Color.Lerp(baseColor, highlight, t));

            yield return null;
        }

        t = 0f;

        while (t < 1f)
        {
            t += Time.deltaTime / 0.14f;

            txt.transform.localScale = Vector3.Lerp(big, original, EaseOutQuad(t));
            txt.color = FullAlpha(Color.Lerp(highlight, baseColor, t));

            yield return null;
        }

        txt.transform.localScale = original;
        txt.color = baseColor;
    }

    IEnumerator ScorePopAnim(TMP_Text txt)
    {
        if (txt == null) yield break;

        Vector3 original = txt.transform.localScale;
        Vector3 big = original * 1.18f;

        float t = 0f;

        while (t < 1f)
        {
            t += Time.deltaTime / 0.10f;
            txt.transform.localScale = Vector3.Lerp(original, big, EaseOutQuad(t));
            yield return null;
        }

        t = 0f;

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

        txt.transform.localScale = original;
    }

    IEnumerator FadeInText(TMP_Text txt)
    {
        if (txt == null) yield break;

        Color c = FullAlpha(txt.color);
        c.a = 0f;
        txt.color = c;

        float t = 0f;

        while (t < 1f)
        {
            t += Time.deltaTime / 0.18f;
            c.a = EaseOutQuad(t);
            txt.color = c;
            yield return null;
        }

        c.a = 1f;
        txt.color = c;
    }

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

    float EaseOutBack(float t)
    {
        t = Mathf.Clamp01(t);

        float c1 = 1.70158f;
        float c3 = c1 + 1f;

        return 1f + c3 * Mathf.Pow(t - 1f, 3f) + c1 * Mathf.Pow(t - 1f, 2f);
    }

    float EaseOutQuad(float t)
    {
        t = Mathf.Clamp01(t);
        return 1f - (1f - t) * (1f - t);
    }
}