using System;
using System.Linq;
using System.Runtime.InteropServices;
using System.Runtime.Remoting.Contexts;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Interop;
using WxOrder.Framework.Commons;
using WxOrder.Framework.Commons.Dialogs;



namespace WxOrder.Framework.Commons
{
	/// <summary>
	/// DialogWindow.xaml 的交互逻辑
	/// </summary>
	public partial class DialogWindow : Window, IDialogWindow
	{
		private readonly Style dialogWindowStyle;
		private bool isConstructorSuccessful = false;
		private UserControl _content;
		public DialogWindow(Window owner = null)
		{
			InitializeComponent();
			Owner = owner ?? Application.Current.MainWindow;
			isConstructorSuccessful = true;
			dialogWindowStyle = (Style)TryFindResource("DialogWindowStyle");
			Loaded += DialogWindow_Loaded;
		}
		private void DialogWindow_Loaded(object sender, RoutedEventArgs e)
		{
			Loaded -= DialogWindow_Loaded;

		}
		protected override void OnContentChanged(object oldContent, object newContent)
		{
			this.Style = dialogWindowStyle;
			if (newContent is System.Windows.Controls.UserControl control)
			{
				_content = control;

				Setter widthSetter = this.Style.Setters.OfType<Setter>().FirstOrDefault(a => a.Property == WidthProperty);
				if (widthSetter == null)
				{
					if (double.IsNaN(control.Width))
					{
						this.Width = DialogWindowProperty.GetWidth(control);
					}
					else
					{
						this.Width = control.Width;
						control.Width = double.NaN;
					}
				}


				Setter heightSetter = this.Style.Setters.OfType<Setter>().FirstOrDefault(a => a.Property == HeightProperty);
				if (heightSetter == null)
				{
					if (double.IsNaN(control.Height))
					{
						this.Height = DialogWindowProperty.GetHeight(control);
					}
					else
					{
						this.Height = control.Height;
						control.Height = double.NaN;
					}
				}


				ResizeMode resizeExt = DialogWindowProperty.GetResizeMode(control);
				if (resizeExt != ResizeMode.CanResize)
				{
					this.ResizeMode = resizeExt;
				}
				WindowStyle wstyleExt = DialogWindowProperty.GetWindowStyle(control);
				if (wstyleExt != WindowStyle.SingleBorderWindow)
				{
					this.WindowStyle = wstyleExt;
				}
			}
			base.OnContentChanged(oldContent, newContent);
		}

		protected override void OnStyleChanged(Style oldStyle, Style newStyle)
		{
			if (newStyle.TargetType == typeof(Window))
			{
				if (isConstructorSuccessful)
				{
					//dialogWindowStyle.Merge(newStyle);
				}
				return;
			}
			base.OnStyleChanged(oldStyle, newStyle);
		}


		#region ShowMiniButton
		private const int GWL_STYLE = -16;
		private const int WS_MINIMIZEBOX = 0x00020000;

		public IDialogResult Result { get; set; }

		[DllImport("user32.dll")]
		private static extern int GetWindowLong(IntPtr hWnd, int nIndex);

		[DllImport("user32.dll")]
		private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);

		protected override void OnSourceInitialized(EventArgs e)
		{
			base.OnSourceInitialized(e);

			var hwnd = new WindowInteropHelper(this).Handle;

			int style = GetWindowLong(hwnd, GWL_STYLE);
			style &= ~WS_MINIMIZEBOX;
			if (DialogWindowProperty.GetShowMinButton(this._content) == false)
			{
				SetWindowLong(hwnd, GWL_STYLE, style);
			}
		}
		#endregion
	}
}