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

namespace AppUI.Util.Group
{

    public class BtnGroupSelector : MonoBehaviour
    {
        Action<int> onSelect;

        int currentIndex = -1;

        public void Init(
            string[] texts,
            int selectIndex,
            Action<int> callback)
        {
            currentIndex = selectIndex;
            onSelect = callback;

            Render(texts);

            for (int i = 0; i < transform.childCount; i++)
            {
                int index = i;

                var btn =
                    transform.GetChild(i)
                    .GetComponentInChildren<Button>();

                btn.onClick.RemoveAllListeners();

                btn.onClick.AddListener(() =>
                {
                    Select(index);
                });
            }
        }

        void Select(int index)
        {
            if (currentIndex == index)
                return;

            currentIndex = index;

            onSelect?.Invoke(index);

            RefreshState();
        }

        void Render(string[] texts)
        {
            for (int i = 0; i < transform.childCount; i++)
            {
                var item =
                    transform.GetChild(i)
                    .GetComponent<SelectItem>();

                item.SetData(
                    texts[i],
                    i == currentIndex);
            }
        }

        void RefreshState()
        {
            for (int i = 0; i < transform.childCount; i++)
            {
                var item =
                    transform.GetChild(i)
                    .GetComponent<SelectItem>();

                item.SetData(
                    item.GetComponentInChildren<TMP_Text>().text,
                    i == currentIndex);
            }
        }
    }
}