using Firebase.Database;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.SceneManagement;
using System.Text.RegularExpressions;
using System.Threading.Tasks; // Tambahan

public class DatabaseManager : MonoBehaviour
{
    public InputField Name;
    public InputField NomorAbsen;

    private DatabaseReference dbReference;

    void Start()
    {
        dbReference = FirebaseDatabase.DefaultInstance.RootReference;
        NomorAbsen.contentType = InputField.ContentType.IntegerNumber;

        Name.onValueChanged.AddListener(FilterNamaInput);
    }

    public async void CreateUser()
    {
        // Validasi input kosong
        if (string.IsNullOrEmpty(Name.text) || string.IsNullOrEmpty(NomorAbsen.text))
        {
            return;
        }

        // Validasi nama
        if (!Regex.IsMatch(Name.text, @"^[a-zA-Z\s]+$"))
        {
            return;
        }

        // Validasi absen harus angka
        int absen;
        if (!int.TryParse(NomorAbsen.text, out absen))
        {
            return;
        }

        // Generate userID unik
        string userID = Name.text.ToLower().Replace(" ", "_") + "_" + NomorAbsen.text;

        PlayerPrefs.SetString("UserID", userID);
        PlayerPrefs.Save();

        DataSnapshot snapshot = await dbReference.Child("users").Child(userID).GetValueAsync();

        if (snapshot.Exists)
        {
            // Ambil skor jika sudah ada
            object scorePretestObj = snapshot.Child("score_pretest").Value;
            int scorePretest = scorePretestObj != null ? int.Parse(scorePretestObj.ToString()) : 0;

            object scoreQuisObj = snapshot.Child("score_quis").Value;
            int scoreQuis = scoreQuisObj != null ? int.Parse(scoreQuisObj.ToString()) : 0;

            PlayerPrefs.SetInt("ScorePretest", scorePretest);
            PlayerPrefs.SetInt("ScoreQuis", scoreQuis);
            PlayerPrefs.Save();

            Debug.Log("User ditemukan. Skor dimuat dari Firebase.");
        }
        else
        {
            // Buat user baru
            User newUser = new User(Name.text, absen);
            string json = JsonUtility.ToJson(newUser);

            await dbReference.Child("users").Child(userID).SetRawJsonValueAsync(json);

            PlayerPrefs.SetInt("ScorePretest", 0);
            PlayerPrefs.SetInt("ScoreQuis", 0);
            PlayerPrefs.Save();

            Debug.Log("User berhasil dibuat: " + Name.text);
        }

        SceneManager.LoadScene("PRETEST");
    }

    private void FilterNamaInput(string input)
    {
        string filtered = Regex.Replace(input, @"[^a-zA-Z\s]", "");
        if (filtered != input)
        {
            Name.text = filtered;
        }
    }
}