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


public class GameManager : MonoBehaviour
{
    public float roundDelay = 1.25f;
    private int currentRound = 1;

    public Text rounds;
    public Text questionText;

    public List<Question> allQuestions;
    public List<Question> answeredQuestions;
    public List<Question> answersUsedThisRound;
    public List<Button> options;
    [HideInInspector]
    public Button correctAnswer;

    public int rndButton;


    private void Start()
    {
        Game();
    }

    public void Game()
    {
        while (true)
        {
            answersUsedThisRound.Clear();
            int randomQuestion = Random.Range(0, allQuestions.Count);
            if (!answeredQuestions.Contains(allQuestions[randomQuestion]))
            {
                questionText.text = allQuestions[randomQuestion].question;
                answeredQuestions.Add(allQuestions[randomQuestion]);

                rndButton = Random.Range(0, options.Count);
                options[rndButton].GetComponent<Reader>().text.text = allQuestions[randomQuestion].answer;
                answersUsedThisRound.Add(allQuestions[randomQuestion]);
                correctAnswer = options[rndButton];

                break;
            }
            else if(allQuestions.Count  == answeredQuestions.Count)
            {
                SceneManager.LoadScene(0);
                break;
            }
        }

        FillRest();
        RoundManager();
    }

    public void FillRest()
    {
        foreach(Button btn in options)
        {
            if(btn != options[rndButton])
            {
                while(btn.transform.GetComponent<Reader>().question == null)
                {
                    int rndQuestion = Random.Range(0, allQuestions.Count);

                    if (!answersUsedThisRound.Contains(allQuestions[rndQuestion]))
                    {
                        btn.GetComponent<Reader>().question = allQuestions[rndQuestion];
                        answersUsedThisRound.Add(allQuestions[rndQuestion]);
                    }
                }
            }
        }
    }

    public void RoundManager()
    {
        rounds.text = $"{currentRound} / {allQuestions.Count}";
    }

    public IEnumerator NewRound()
    {
        yield return new WaitForSeconds(roundDelay);
        currentRound++;
        foreach(Button btn in options)
        {
            btn.interactable = true;
            btn.GetComponent<Image>().color = Color.white;
            btn.GetComponent<Reader>().question = null;
        }

        Game();
    }
}