using System;
using GameOff.Core;
using UnityEngine;
using UnityEngine.UI;

namespace GameOff.UI.Answer
{
    public class AnswerDisplayUI: MonoBehaviour
    {
        [SerializeField] private QuizTaker target;
        [SerializeField] private Text title;
        [SerializeField] private AnswerUI answerPrefab;
        [SerializeField] private Transform answerHolder;


        private void OnEnable()
        {
            target.OnAnswerUpdate += QuizTaker_OnAnswerUpdate;

            title.text = $"{target.transform.name} Answers";
            
            ClearChildren();
            UpdateAnswers();
        }

        private void OnDisable()
        {
            target.OnAnswerUpdate -= QuizTaker_OnAnswerUpdate;
        }

        private void QuizTaker_OnAnswerUpdate(object sender, EventArgs e)
        {
            ClearChildren();
            UpdateAnswers();
        }

        private void UpdateAnswers()
        {
            string[] answers = target.Answers;
            
            for (int i = 0; i < answers.Length; i++)
                Instantiate(answerPrefab, answerHolder).SetUp(i + 1, answers[i] == null ? "-" : answers[i]);
        }
        
        private void ClearChildren()
        {
            foreach (Transform child in answerHolder)
                Destroy(child.gameObject);
        }
    }
}