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

//用于显示获得物品的窗口
public class CommonGetItemWin : UIBase
{
    [SerializeField] ScrollerController scroller;


    protected override void OnPreOpen()
    {
        ItemLogicUtility.Instance.OnGetItemShowEvent += OnGetItemShowEvent;
        scroller.OnRefreshCell += OnRefreshCell;
        CreateScroller();
    }


    protected override void OnPreClose()
    {
        ItemLogicUtility.Instance.OnGetItemShowEvent -= OnGetItemShowEvent;
        scroller.OnRefreshCell -= OnRefreshCell;
        ItemLogicUtility.Instance.ClearGetItem();

    }

    List<Item> showItems = new List<Item>();
    void CreateScroller()
    {
        scroller.Refresh();
        showItems = ItemLogicUtility.Instance.totalShowItems.Values.ToList();
        showItems.Sort(SortItem);
        for (int i = 0; i < showItems.Count; i++)
        {
            if (i % 5 == 0)
            { 
                scroller.AddCell(ScrollerDataType.Header, i);
            }
        }
        scroller.Restart();
    }

    int SortItem(Item itemA, Item itemB)
    { 
        var itemConfigA = ItemConfig.Get(itemA.id);
        var itemConfigB = ItemConfig.Get(itemB.id);
        return itemConfigB.ItemColor - itemConfigA.ItemColor;
    }

    float needRefreshTime;  //避免封包过多卡顿
    void OnGetItemShowEvent()
    {
        needRefreshTime = Time.time + 0.3f;

    }

    void RefreshScroller()
    {
        if (needRefreshTime <= 0)
            return;

        if (Time.time < needRefreshTime)
            return;

        if (scroller.GetNumberOfCells(scroller.m_Scorller) != ItemLogicUtility.Instance.totalShowItems.Count)
        {
            CreateScroller();
        }
        else
        {
            scroller.m_Scorller.RefreshActiveCellViews();
        }
        needRefreshTime = 0;
    }

    protected void LateUpdate()
    {
        RefreshScroller();
    }

    void OnRefreshCell(ScrollerDataType type, CellView cell)
    {
        var _cell = cell as CommonGetItemCell;
        _cell?.Display(cell.index, showItems);
    }
}