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

namespace PhxhSDK
{
    public class UIImageDropDown<T> : UIGameObjectWrapper
    {
        private readonly Action<T> _onValueChanged;
        private readonly TMP_Dropdown _dropdown;
        private readonly Func<T, string> _data2Text;
        private readonly Func<T, Sprite> _data2Img;

        private readonly TMP_Text _text;
        private int _currentSelected;
        private List<T> _datas;


        public UIImageDropDown(GameObject go, GameObject selectTextObject, Action<T> onValueChanged,
            Func<T, string> data2Text,Func<T,Sprite>data2Img) : base(go, true)
        {
            _dropdown = GetItem<TMP_Dropdown>();
            _text = GetItem<TMP_Text>(selectTextObject);

            if (_dropdown == null)
            {
                DebugUtil.LogError("cannot find TMP_Dropdown component in {0}", go?.name);
            }

            if (_text == null)
            {
                DebugUtil.LogError("cannot find TMP_Text component in {0}", selectTextObject?.name);
            }

            _onValueChanged = onValueChanged;
            _data2Img = data2Img;
            _data2Text = data2Text;
            _dropdown.onValueChanged.AddListener(_OnValueChanged);
        }

        public void SetData(IEnumerable<T> collection)
        {
            _datas?.Clear();
            var enumerable = collection.ToList();
            _datas = new List<T>(enumerable);

            if (_dropdown != null)
            {
                _dropdown.ClearOptions();
                foreach (var item in enumerable)
                {
                    var data = new TMP_Dropdown.OptionData();
                    if (_data2Img != null)
                    {
                        data.image = _data2Img(item);
                    }
                    _dropdown.options.Add(data);
                }
            }
        }

        public void Clear()
        {
            _dropdown?.ClearOptions();
        }
        private void _OnValueChanged(int value)
        {
            _currentSelected = value;

            if (_datas != null && _currentSelected >= 0 && _currentSelected < _datas.Count)
            {
                if (_data2Text != null && _text != null)
                {
                    _text.text = _data2Text(_datas[_currentSelected]);
                }

                _onValueChanged?.Invoke(_datas[_currentSelected]);
            }
        }
    }
}