// 本脚本只在不存在时会生成一次。组件逻辑写在当前脚本内。已存在不会再次生成覆盖 

using System;
using System.Collections.Generic;
using UnityEngine;
using FairyGUI;
using NBC;

namespace NBF
{
    public partial class ClassifyList : GComponent
    {
        private readonly List<object> _listData = new List<object>();
        
        public event Action<object> OnClickItem;

        public int SelectedIndex => List.selectedIndex;
        
        private void OnInited()
        {
            List.itemProvider = GetListItemResource;
            List.itemRenderer = OnRenderItem;
            List.onClickItem.Add(OnClickListItem);
        }

        public void SetListData(List<object> listData)
        {
            _listData.Clear();
            foreach (var obj in listData)
            {
                _listData.Add(obj);
            }
            List.numItems = _listData.Count;
            List.ScrollToView(0);
        }

        void OnClickListItem(EventContext context)
        {
            Debug.Log($"con={context.data} nm={context.sender}");
            OnClickItem?.Invoke(null);
        }
        
        void OnRenderItem(int index, GObject obj)
        {
            if (obj is ListItemBase item)
            {
                item.SetData(_listData[index]);
            }
        }

        //根据索引的不同，返回不同的资源URL
        string GetListItemResource(int index)
        {
            var itemData = _listData[index];
            
            if (itemData is ShopGearData shopItem)
            {
                return ShopGearItem.URL;
            }

            if (itemData is ListClassifyData item)
            {
                return ListTitleItem.URL;
            }

            return List.defaultItem;
        }
    }
}