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

public class SentenceOrderGameScene : 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 selectedWordsText;
    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 10";

    [Header("RENKLER")]
    public Color normalColor = new Color32(255, 255, 255, 70);
    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);

    [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
    private class SentenceEntry
    {
        public string[] sentence = new string[6];
    }

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

    private string[] correctWords;
    private string[] scrambledWords;

    private int[] order;
    private int selectedCount = 0;

    private bool locked = false;
    private int lastID = -1;

    private int score = 0;
    private int combo = 0;
    private float timeLeft = 60f;
    private float nextTimer = 0f;

    // LANGUAGE & MOD KEY
    private string lang;
    private string modKey = "Mod10";

    // Counters
    private int correctCount = 0;
    private int wrongCount = 0;

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

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

    Coroutine feedbackCo;

    // ------------------------------------------------------------
    void Start()
    {
        lang = PlayerPrefs.GetString("QuestionLangCode", "en");
        order = new int[answerButtons.Length];

        if (questionFile == null)
        {
            Debug.LogError("SentenceOrderGameScene: TXT bağlanmamış!");
            return;
        }

        CacheButtonData();
        PrepareFeedbackText();

        LoadTXT(questionFile.text);
        Shuffle(questions);

        submitButton.onClick.AddListener(OnSubmit);
        extraTimeButton.onClick.AddListener(() => timeLeft += 5f);
        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";

        NextQuestion();
    }

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

        UpdateTimerUI();

        if (locked && nextTimer > 0)
        {
            nextTimer -= Time.deltaTime;
            if (nextTimer <= 0)
                NextQuestion();
        }
    }

    // ------------------------------------------------------------
    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;

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

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

            string[] p = line.Split(',');
            if (p.Length < 6) continue;

            SentenceEntry e = new SentenceEntry();
            for (int i = 0; i < 6; i++)
                e.sentence[i] = p[i].Trim();

            questions.Add(e);
        }
    }

    // ------------------------------------------------------------
    void NextQuestion()
    {
        nextTimer = 0f;
        locked = false;
        selectedCount = 0;

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

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

        for (int i = 0; i < order.Length; i++)
            order[i] = 0;

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

            answerButtons[i].interactable = true;
            answerButtons[i].image.color = FullAlpha(normalColor);
            answerButtons[i].transform.localScale = originalButtonScales[i];
            answerButtons[i].transform.localPosition = originalButtonPositions[i];
            answerButtons[i].gameObject.SetActive(false);
        }

        // random
        int qID = Random.Range(0, questions.Count);
        if (qID == lastID && questions.Count > 1)
            qID = (qID + 1) % questions.Count;
        lastID = qID;

        SentenceEntry entry = questions[qID];
        int L = GetLangIndex();

        string s = entry.sentence[L];
        questionText.text = s;
        StartCoroutine(FadeInText(questionText));

        correctWords = s.Split(' ');

        int wc = Mathf.Min(correctWords.Length, answerButtons.Length);
        System.Array.Resize(ref correctWords, wc);

        scrambledWords = (string[])correctWords.Clone();
        Shuffle(scrambledWords);

        for (int i = 0; i < wc; i++)
        {
            answerButtons[i].gameObject.SetActive(true);
            answerTexts[i].text = scrambledWords[i];

            int id = i;
            answerButtons[i].onClick.RemoveAllListeners();
            answerButtons[i].onClick.AddListener(() => OnClickWord(id));

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

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

        int wc = correctWords.Length;

        if (order[id] != 0)
        {
            int old = order[id];
            order[id] = 0;

            for (int i = 0; i < wc; i++)
                if (order[i] > old)
                    order[i]--;

            selectedCount--;
        }
        else
        {
            selectedCount++;
            order[id] = selectedCount;
        }

        RefreshUI();
    }

    // ------------------------------------------------------------
    void RefreshUI()
    {
        int wc = correctWords.Length;
        List<string> seq = new List<string>();

        for (int i = 0; i < wc; i++)
        {
            if (order[i] > 0)
            {
                answerButtons[i].image.color = FullAlpha(selectedColor);
                answerTexts[i].text = order[i] + ". " + scrambledWords[i];

                StartScaleAnim(i, originalButtonScales[i] * selectedScale);
            }
            else
            {
                answerButtons[i].image.color = FullAlpha(normalColor);
                answerTexts[i].text = scrambledWords[i];

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

        for (int orderNum = 1; orderNum <= wc; orderNum++)
            for (int j = 0; j < wc; j++)
                if (order[j] == orderNum)
                    seq.Add(scrambledWords[j]);

        if (selectedWordsText != null)
            selectedWordsText.text = string.Join(" | ", seq);
    }

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

        int wc = correctWords.Length;

        if (selectedCount < wc)
        {
            SetFeedback("Select all words!", wrongColor);
            return;
        }

        locked = true;

        bool ok = true;

        for (int orderNum = 1; orderNum <= wc; orderNum++)
            for (int i = 0; i < wc; i++)
                if (order[i] == orderNum && scrambledWords[i] != correctWords[orderNum - 1])
                    ok = false;

        for (int i = 0; i < wc; i++)
            answerButtons[i].interactable = false;

        if (ok)
        {
            correctCount++;
            combo++;

            score += 50 + (combo - 1) * 10;
            timeLeft += 2f;

            for (int i = 0; i < wc; i++)
            {
                answerButtons[i].image.color = FullAlpha(correctColor);
                StartCoroutine(CorrectPulse(answerButtons[i], i));
            }

            SetFeedback(combo >= 3 ? $"TRUE   {combo}x COMBO!" : "TRUE", correctColor);

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

            for (int i = 0; i < wc; i++)
            {
                answerButtons[i].image.color = FullAlpha(wrongColor);
                StartCoroutine(ShakeButton(answerButtons[i], i));
            }

            SetFeedback("FALSE", wrongColor);
        }

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

        if (scoreText != null) StartCoroutine(ScorePopAnim(scoreText));

        nextTimer = 1f;
    }

    // ------------------------------------------------------------
    // HINT: İlk kelimeyi otomatik seçer
    // ------------------------------------------------------------
    void OnHint()
    {
        if (locked) return;

        int wc = correctWords.Length;

        // Önce tüm seçimleri sıfırla
        selectedCount = 0;
        for (int i = 0; i < wc; i++)
            order[i] = 0;

        // Doğru ilk kelime
        string firstWord = correctWords[0];

        // Scrambled içinde doğru kelimenin index'ini bul
        for (int i = 0; i < wc; i++)
        {
            if (scrambledWords[i] == firstWord)
            {
                order[i] = 1;
                selectedCount = 1;
                StartCoroutine(CorrectPulse(answerButtons[i], i));
                break;
            }
        }

        RefreshUI();

        SetFeedback("Hint used!", selectedColor);
    }

    // ------------------------------------------------------------
    void SetFeedback(string msg, Color c)
    {
        if (feedbackText == null) return;

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

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

        if (feedbackCo != null) StopCoroutine(feedbackCo);
        feedbackCo = StartCoroutine(FeedbackAnim(feedbackText));
    }

    // ------------------------------------------------------------
    void GameOver()
    {
        // 🔥 Mod Select / Leaderboard ekranına direkt bağlanacak basit key
        PlayerPrefs.SetInt("Mod10Skor", score);

        // kayıt sistemi
        PlayerPrefs.SetString("LastPlayedMod", modKey);
        PlayerPrefs.SetInt(modKey + "_LastScore", score);

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

        PlayerPrefs.SetInt(modKey + "_Correct", correctCount);
        PlayerPrefs.SetInt(modKey + "_Wrong", wrongCount);

        PlayerPrefs.Save();

        // 🔥 MOD 10 SONUÇ SAHNESİ
        SceneManager.LoadScene("Mod10Resume");
    }

    // ------------------------------------------------------------
    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 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 * 0.05f);

        Vector3 targetPos = originalButtonPositions[idx];
        Vector3 startPos = targetPos + Vector3.up * 30f;

        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;
        if (idx < 0 || idx >= originalButtonScales.Length) 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;
        if (idx < 0 || idx >= originalButtonPositions.Length) 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 = Vector3.one;
        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;
        feedbackCo = null;
    }

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

        Vector3 original = Vector3.one;
        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 = Vector3.one;
        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);
    }
}