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

public class QuizHandler : MonoBehaviour
{

    public TextAsset questions;
    private string[] question;
    private string[,] questionPart;

    // UI Component
    public Text txtQuetion, txtA, txtB, txtC, txtD, txtTA, txtTB;

    public Text txtTitle;

    public GameObject panel;
    public GameObject imgScore, imgResult;

    public Text txtFinalScore, txtCorrectScore, txtWrongScore;

    int indexQuestion;
    int maxQuestion;
    bool isPossible;
    char keyAnswer;
    bool[] questionAlreadyUsed;

    // Panel
    bool isEnd;
    private float duration;
    public float durationResult;

    // Score
    int correctScore, wrongScore;
    float finalScore;

    // UI
    public GameObject optionA;
    public GameObject optionB;
    public GameObject optionC;
    public GameObject optionD;
    public GameObject optionTA;
    public GameObject optionTB;


    // Start is called before the first frame update
    void Start()
    {
        duration = durationResult;
        question = questions.ToString().Split('#');

        questionAlreadyUsed = new bool[question.Length];

        questionPart = new string[question.Length, 6];
        isPossible = true;
        maxQuestion = 15;
        QuestionManager();
        ShowQuestion();
    }

    private void QuestionManager()
    {
        for (int i = 0; i < question.Length; i++)
        {
            string[] questionTemp = question[i].Split('+');
            for (int j = 0; j < questionTemp.Length; j++)
            {
                questionPart[i, j] = questionTemp[j];
                continue;
            }
            continue;
        }
    }

    private void ShowQuestion()
    {

        if (indexQuestion < maxQuestion)
        {
            if (isPossible)
            {
                for (int i = 0; i < question.Length; i++)
                {
                    int randomIndexQuestion = Random.Range(0, question.Length);
                    if (!questionAlreadyUsed[randomIndexQuestion])
                    {
                        txtQuetion.text = questionPart[randomIndexQuestion, 0];
                        txtA.text = questionPart[randomIndexQuestion, 1];
                        txtB.text = questionPart[randomIndexQuestion, 2];
                        txtC.text = questionPart[randomIndexQuestion, 3];
                        txtD.text = questionPart[randomIndexQuestion, 4];
                        keyAnswer = questionPart[randomIndexQuestion, 5][0];

                        optionA.SetActive(true);
                        optionC.SetActive(true);

                        print(randomIndexQuestion);
                        if (randomIndexQuestion > 39)
                        {
                            print("TRUE FALSE");
                            optionB.SetActive(false);
                            optionD.SetActive(false);
                        }
                        else
                        {
                            print("PILGAN");
                            optionB.SetActive(true);
                            optionD.SetActive(true);
                        }

                        questionAlreadyUsed[randomIndexQuestion] = true;
                        isPossible = false;
                        break;
                    }
                    else
                    {
                        continue;
                    }
                }
            }
        }
    }


    public void Option(string optionChar)
    {
        AnswerCheck(optionChar[0]);
        if (indexQuestion == maxQuestion - 1)
        {
            isEnd = true;
        }
        else
        {
            indexQuestion++;
            isPossible = true;
        }

        if (panel != null)
        {
            bool isActive = panel.activeSelf;
            panel.SetActive(!isActive);
        }
    }

    private float SumScore()
    {
        return finalScore = Mathf.Round((float)correctScore / maxQuestion * 100);
    }

    private void AnswerCheck(char data)
    {
        string title;
        if (data.Equals(keyAnswer))
        {
            title = "Benar !";
            correctScore++;
        }
        else
        {
            title = "Salah !";
            wrongScore++;
        }
        txtTitle.text = title;
    }

    // Update is called once per frame
    void Update()
    {
        if (panel.activeSelf)
        {
            durationResult -= Time.deltaTime;

            if (isEnd)
            {
                imgScore.SetActive(true);
                imgResult.SetActive(false);

                if (durationResult <= 0)
                {
                    txtCorrectScore.text = correctScore.ToString();
                    txtWrongScore.text = wrongScore.ToString();
                    txtFinalScore.text = SumScore().ToString();

                    imgScore.SetActive(false);
                    imgResult.SetActive(true);

                    durationResult = 0;
                }
            }
            else
            {
                imgScore.SetActive(true);
                imgResult.SetActive(false);

                if (durationResult <= 0)
                {
                    panel.SetActive(false);
                    durationResult = duration;
                    ShowQuestion();
                }
            }
        }
    }
    public void GoToMainMenu()
    {
        SceneManager.LoadScene("MainMenu");
    }
}