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

[System.Serializable]
public class SoalData
{
    public string bab;
    public string pertanyaan;
    public string[] pilihan;
    public int jawabanBenar;
}

[System.Serializable]
public class KoleksiSoalJSON
{
    public List<BabJSON> bab;
}

[System.Serializable]
public class BabJSON
{
    public string nama;
    public List<SoalJSON> soal;
}

[System.Serializable]
public class SoalJSON
{
    public string pertanyaan;
    public string[] pilihan;
    public int jawaban;
}

public class QuizSystem : MonoBehaviour
{
    [Header("UI Dasar")]
    public TextMeshProUGUI txtSoal;
    public Button[] btnJawaban;
    public GameObject panelHasil;
    public TextMeshProUGUI txtSkor;
    public TextMeshProUGUI txtRekap;

    [Header("Panel")]
    public GameObject panelLoading;
    public GameObject panelOffline;

    [Header("Audio")]
    public AudioClip suaraBenar;
    public AudioClip suaraSalah;
    private AudioSource audioSource;


    [Header("Nama Scene Main Menu")]
    public string namaSceneMainMenu = "Main Menu";

    [Header("Konfigurasi")]
    public string csvURL = "";
    public string namaFileJSON = "soalkuis";
    public int[] jumlahSoalPerBab = { 3, 3, 2, 2 };
    private readonly string[] daftarNamaBab = { "Struktur Bumi", "Pergerakan Lempeng", "Gempa Bumi", "Gunung Berapi" };

    private List<SoalData> listSoalMain = new List<SoalData>();
    private int indexSoalSekarang = 0;
    private int totalSkor = 0;
    private Dictionary<string, int> benarPerBab = new Dictionary<string, int>();
    private Dictionary<string, int> totalPerBab = new Dictionary<string, int>();

    void Start()
    {
        audioSource = gameObject.AddComponent<AudioSource>();

        panelHasil.SetActive(false);
        panelOffline.SetActive(false);

        CobaSambungOnline();
    }

    // ───────────────────────────────────────────
    //  LOGIKA KONEKSI
    // ───────────────────────────────────────────

    void CobaSambungOnline()
    {
        panelOffline.SetActive(false);
        panelLoading.SetActive(true);
        StartCoroutine(DownloadCSV());
    }

   
    IEnumerator DownloadCSV()
    {
        using (UnityWebRequest webRequest = UnityWebRequest.Get(csvURL))
        {
            webRequest.timeout = 10;
            yield return webRequest.SendWebRequest();

            panelLoading.SetActive(false);

            if (webRequest.result != UnityWebRequest.Result.Success)
            {
                Debug.LogWarning("Gagal konek: " + webRequest.error);
                panelOffline.SetActive(true);
            }
            else
            {
                ParseCSV(webRequest.downloadHandler.text);
                MulaiGame();
            }
        }
    }

    // ───────────────────────────────────────────
    //  TOMBOL PANEL OFFLINE
    // ───────────────────────────────────────────

    public void KlikCobaLagi()
    {
        CobaSambungOnline();
    }

    public void KlikMainOffline()
    {
        panelOffline.SetActive(false);
        MuatDataLokal();
    }

    // ───────────────────────────────────────────
    //  PARSE & MUAT DATA
    // ───────────────────────────────────────────

    void ParseCSV(string konten)
    {
        Dictionary<string, List<SoalData>> tempBab = new Dictionary<string, List<SoalData>>();
        string[] baris = konten.Split(new string[] { "\r\n", "\n" }, System.StringSplitOptions.RemoveEmptyEntries);

        for (int i = 1; i < baris.Length; i++)
        {
            string[] kolom = PecahKolomCSV(baris[i]);
            if (kolom.Length < 7) continue;

            string namaBab = kolom[0].Trim();
            if (int.TryParse(kolom[6].Trim(), out int indexJawaban))
            {
                if (!tempBab.ContainsKey(namaBab)) tempBab[namaBab] = new List<SoalData>();
                tempBab[namaBab].Add(new SoalData
                {
                    bab = namaBab,
                    pertanyaan = kolom[1].Trim(),
                    pilihan = new string[] { kolom[2].Trim(), kolom[3].Trim(), kolom[4].Trim(), kolom[5].Trim() },
                    jawabanBenar = indexJawaban
                });
            }
        }
        ProsesAcakSoal(tempBab);
    }

    void MuatDataLokal()
    {
        TextAsset fileTeks = Resources.Load<TextAsset>(namaFileJSON);
        if (fileTeks == null) { Debug.LogError("File JSON tidak ditemukan!"); return; }

        KoleksiSoalJSON data = JsonUtility.FromJson<KoleksiSoalJSON>(fileTeks.text);
        Dictionary<string, List<SoalData>> tempBab = new Dictionary<string, List<SoalData>>();

        foreach (var b in data.bab)
        {
            if (!tempBab.ContainsKey(b.nama)) tempBab[b.nama] = new List<SoalData>();
            foreach (var s in b.soal)
                tempBab[b.nama].Add(new SoalData
                {
                    bab = b.nama,
                    pertanyaan = s.pertanyaan,
                    pilihan = s.pilihan,
                    jawabanBenar = s.jawaban
                });
        }
        ProsesAcakSoal(tempBab);
        MulaiGame();
    }

    void ProsesAcakSoal(Dictionary<string, List<SoalData>> bahan)
    {
        listSoalMain.Clear();
        for (int i = 0; i < daftarNamaBab.Length; i++)
        {
            string target = daftarNamaBab[i];
            if (!bahan.ContainsKey(target)) continue;

            List<SoalData> pool = bahan[target];
            for (int t = 0; t < pool.Count; t++)
            {
                SoalData tmp = pool[t];
                int r = Random.Range(t, pool.Count);
                pool[t] = pool[r];
                pool[r] = tmp;
            }

            int jatah = (i < jumlahSoalPerBab.Length) ? jumlahSoalPerBab[i] : 1;
            for (int j = 0; j < Mathf.Min(jatah, pool.Count); j++)
                listSoalMain.Add(pool[j]);
        }
    }

    // ───────────────────────────────────────────
    //  GAME LOGIC
    // ───────────────────────────────────────────

    void MulaiGame()
    {
        if (listSoalMain.Count == 0) { Debug.LogError("Soal Kosong!"); return; }

        indexSoalSekarang = 0;
        totalSkor = 0;
        benarPerBab.Clear();
        totalPerBab.Clear();

        foreach (var s in listSoalMain)
        {
            if (!totalPerBab.ContainsKey(s.bab)) { totalPerBab[s.bab] = 0; benarPerBab[s.bab] = 0; }
            totalPerBab[s.bab]++;
        }

        TampilkanSoal();
    }

    void TampilkanSoal()
    {
        if (indexSoalSekarang >= listSoalMain.Count)
        {
            TampilHasil();
            return;
        }

        SoalData s = listSoalMain[indexSoalSekarang];
        txtSoal.text = s.pertanyaan;

        for (int i = 0; i < btnJawaban.Length; i++)
        {
            btnJawaban[i].interactable = true;
            btnJawaban[i].GetComponent<Image>().color = Color.white;
            btnJawaban[i].GetComponentInChildren<TextMeshProUGUI>().text = s.pilihan[i];
            int idx = i;
            btnJawaban[i].onClick.RemoveAllListeners();
            btnJawaban[i].onClick.AddListener(() => Jawab(idx));
        }
    }

    void Jawab(int k)
    {
        SoalData s = listSoalMain[indexSoalSekarang];
        if (k == s.jawabanBenar)
        {
            totalSkor += 10;
            benarPerBab[s.bab]++;
            btnJawaban[k].GetComponent<Image>().color = Color.green;
            if (suaraBenar != null) audioSource.PlayOneShot(suaraBenar);
        }
        else
        {
            btnJawaban[k].GetComponent<Image>().color = Color.red;
            btnJawaban[s.jawabanBenar].GetComponent<Image>().color = Color.green;
            if (suaraSalah != null) audioSource.PlayOneShot(suaraSalah);
        }

        foreach (var b in btnJawaban) b.interactable = false;
        indexSoalSekarang++;
        Invoke("TampilkanSoal", 1.5f);
    }

    void TampilHasil()
    {
        panelHasil.SetActive(true);
        txtSkor.text = "Skor: " + totalSkor;

        string terlemah = "";
        float nilaiMin = 1.1f;
        foreach (var sb in totalPerBab)
        {
            float rasio = (float)benarPerBab[sb.Key] / sb.Value;
            if (rasio < nilaiMin) { nilaiMin = rasio; terlemah = sb.Key; }
        }

        if (txtRekap != null)
            txtRekap.text = terlemah != "" && nilaiMin < 1f
                ? "Pelajari lagi:\n" + terlemah
                : "Semua sub bab sudah bagus!";
    }

    // ───────────────────────────────────────────
    //  TOMBOL PANEL HASIL
    // ───────────────────────────────────────────

    public void KlikUlangi()
    {
        panelHasil.SetActive(false);
        CobaSambungOnline();
    }

    public void KlikKembali()
    {
        SceneManager.LoadScene(namaSceneMainMenu);
    }

    // ───────────────────────────────────────────
    //  HELPER
    // ───────────────────────────────────────────

    string[] PecahKolomCSV(string baris)
    {
        List<string> hasil = new List<string>();
        bool dalamKutip = false;
        string temp = "";
        foreach (char c in baris)
        {
            if (c == '"') dalamKutip = !dalamKutip;
            else if (c == ',' && !dalamKutip) { hasil.Add(temp); temp = ""; }
            else temp += c;
        }
        hasil.Add(temp);
        return hasil.ToArray();
    }
}