using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

using CommunityToolkit.Mvvm.ComponentModel;

using UIFramework;

namespace Sai.Toolkit.Revit.Helpers;

#if REVIT2020||REVIT2025
public static class OptionsBarAssist
{
    private static readonly Grid RootGrid;
    private static ContentPresenter _panelPresenter;
    private static readonly FrameworkElement InternalToolPanel;

    static OptionsBarAssist()
    {
        //找到整个Revit界面的Grid
        RootGrid = VisualAssist.FindVisualParent<Grid>(Autodesk.Windows.ComponentManager.Ribbon, "rootGrid");
        if (RootGrid is null)
        {
            throw new InvalidOperationException("无法在 Revit UI 中找到root Grid");
        }
        //选项栏所在的Panel，在第二行Index为1，类型是DialogBarControl
        InternalToolPanel = VisualAssist.FindVisualChild<DialogBarControl>(RootGrid, string.Empty);
        if (InternalToolPanel is null)
        {
            throw new InvalidOperationException("无法在 Revit UI 中找到内部工具面板");
        }
    }

    public static void ShowOptionsBar(FrameworkElement content)
    {
        if (_panelPresenter is not null)
        {
            //var actuallWidth = 0.0;
            //var controlHost = VisualAssist.FindVisualChild<ControlHost>(InternalToolPanel, string.Empty);
            //var size = VisualTreeHelper.GetChildrenCount(controlHost);
            //for (int i = 0; i < size; i++)
            //{
            //    var child = VisualTreeHelper.GetChild(controlHost, 0) as FrameworkElement;
            //    actuallWidth += child.ActualWidth;
            //}
            _panelPresenter.Content = content;
            _panelPresenter.Visibility = System.Windows.Visibility.Visible;
            //设为0，隐藏内部的Panel
            //InternalToolPanel.Height = 0;
            return;
        }
        //第一次执行时，会创建
        _panelPresenter = CreateOptionsBar();
        _panelPresenter.Content = content;

        //InternalToolPanel.Height = 0;
    }

    public static void HideOptionsBar()
    {
        if (_panelPresenter is null)
        {
            return;
        }

        _panelPresenter.Content = null;
        _panelPresenter.Visibility = System.Windows.Visibility.Collapsed;

        InternalToolPanel.Height = 26;
    }

    public static async void HideOptionsBar(TimeSpan delay)
    {
        await Task.Delay(delay);
        HideOptionsBar();
    }

    private static ContentPresenter CreateOptionsBar()
    {
        const int panelRow = 1;
        //在内部OptionsBar下方插入一行
        RootGrid.RowDefinitions.Insert(panelRow, new RowDefinition { Height = new GridLength(1, GridUnitType.Auto) });
        //RootGrid.ColumnDefinitions.Insert(1,new ColumnDefinition { Width=new GridLength(1, GridUnitType.Auto) });
        //把下方的所有元素都往下移动一行
        foreach (UIElement child in RootGrid.Children)
        {
            var row = Grid.GetRow(child);
            if (row > 0)
            {
                Grid.SetRow(child, row + 1);
            }
            //Grid.SetColumnSpan(child, 2);
        }
        var panelPresenter = new ContentPresenter();
        Grid.SetRow(panelPresenter, panelRow);
        //Grid.SetColumn(panelPresenter, panelRow);
        RootGrid.Children.Add(panelPresenter);

        return panelPresenter;

        //var panelPresenter = new ContentPresenter();
        //Grid.SetRow(panelPresenter, 1);
        //RootGrid.Children.Add(panelPresenter);
        //return panelPresenter;
    }
    /// <summary>
    /// 简单注册并调用
    /// </summary>
    /// <typeparam name="TV"></typeparam>
    /// <typeparam name="TM"></typeparam>
    /// <param name="action"></param>
	public static void RegisterOptionsBar<TV, TM>(Action<TV, TM> action)
        where TV : Panel, new()
        where TM : ObservableObject, new()
    {
        try
        {
            TM viewModel = new();
            var view = new TV() { DataContext = viewModel };
            action(view, viewModel);
            ShowOptionsBar(view);
        }
        catch (Exception)
        {
            throw;
        }
    }
}
#endif