using System.Collections.Generic;
using UnityEngine;

public partial class UIManager
{
    /// <summary>
    /// 动静分离，Canvas分层
    /// </summary>
    public enum ECanvasRoot
    {
        Dynamic0,
        Static1,
        Dynamic2,
        Static3,
        Dynamic4
    }
    private LinkedList<UIWindow> _GetLayerWindowList(UIWindowLayer layer)
    {
        LinkedList<UIWindow> windowsL = new LinkedList<UIWindow>();
        foreach (var windowData in _layerList)
        {
            if (windowData.Key == (int)layer)
            {
                windowsL = windowData.Value;
                break;
            }
        }

        return windowsL;
    }
    
    private bool _CheckIsLayerListEmpty(UIWindowLayer enumType)
    {
        var normalWindowList = _GetLayerWindowList(enumType);
        if (normalWindowList.Count > 0)
        {
            return false;
        }

        return true;
    }

    public bool CheckIsLayerListEmpty(UIWindowLayer enumType)
    {
        return _CheckIsLayerListEmpty(enumType);
    }

    public UIWindow GetTopWindowInLayer(UIWindowLayer windowType)
    {
        if (_layerList.TryGetValue((int)windowType, out var windowList))
        {
            if (windowList.Count > 0)
            {
                UIWindow window = windowList.Last.Value;
                return window;
            }
        }

        return null;
    }
}