using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.ApplicationLifetimes;
using LibationWinForms.AvaloniaUI.ViewModels.Dialogs;
using LibationWinForms.AvaloniaUI.Views.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace LibationWinForms.AvaloniaUI
{
	public enum DialogResult
	{
		None = 0,
		OK = 1,
		Cancel = 2,
		Abort = 3,
		Retry = 4,
		Ignore = 5,
		Yes = 6,
		No = 7,
		TryAgain = 10,
		Continue = 11
	}


	public enum MessageBoxIcon
	{
		None = 0,
		Error = 16,
		Hand = 16,
		Stop = 16,
		Question = 32,
		Exclamation = 48,
		Warning = 48,
		Asterisk = 64,
		Information = 64
	}
	public enum MessageBoxButtons
	{
		OK,
		OKCancel,
		AbortRetryIgnore,
		YesNoCancel,
		YesNo,
		RetryCancel,
		CancelTryContinue
	}

	public enum MessageBoxDefaultButton
	{
		Button1,
		Button2 = 256,
		Button3 = 512,
	}

	public class MessageBox
	{

		/// <summary>Displays a message box with the specified text, caption, buttons, icon, and default button.</summary>
		/// <param name="text">The text to display in the message box.</param>
		/// <param name="caption">The text to display in the title bar of the message box.</param>
		/// <param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
		/// <param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
		/// <param name="defaultButton">One of the <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" /> values that specifies the default button for the message box.</param>
		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
		/// <exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
		///   <paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.  
		/// -or-  
		/// <paramref name="icon" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.  
		/// -or-  
		/// <paramref name="defaultButton" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" />.</exception>
		/// <exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
		public static async Task<DialogResult> Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton)
		{
			return await ShowCore(null, text, caption, buttons, icon, defaultButton);
		}


		/// <summary>Displays a message box with specified text, caption, buttons, and icon.</summary>
		/// <param name="text">The text to display in the message box.</param>
		/// <param name="caption">The text to display in the title bar of the message box.</param>
		/// <param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
		/// <param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
		/// <exception cref="T:System.ComponentModel.InvalidEnumArgumentException">The <paramref name="buttons" /> parameter specified is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.  
		///  -or-  
		///  The <paramref name="icon" /> parameter specified is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.</exception>
		/// <exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
		public static async Task<DialogResult> Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon)
		{
			return await ShowCore(null, text, caption, buttons, icon, MessageBoxDefaultButton.Button1);
		}


		/// <summary>Displays a message box with specified text, caption, and buttons.</summary>
		/// <param name="text">The text to display in the message box.</param>
		/// <param name="caption">The text to display in the title bar of the message box.</param>
		/// <param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
		/// <exception cref="T:System.ComponentModel.InvalidEnumArgumentException">The <paramref name="buttons" /> parameter specified is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.</exception>
		/// <exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
		public static async Task<DialogResult> Show(string text, string caption, MessageBoxButtons buttons)
		{
			return await ShowCore(null, text, caption, buttons, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
		}


		/// <summary>Displays a message box with specified text and caption.</summary>
		/// <param name="text">The text to display in the message box.</param>
		/// <param name="caption">The text to display in the title bar of the message box.</param>
		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
		public static async Task<DialogResult> Show(string text, string caption)
		{
			return await ShowCore(null, text, caption, MessageBoxButtons.OK, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
		}

		/// <summary>Displays a message box with specified text.</summary>
		/// <param name="text">The text to display in the message box.</param>
		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
		public static async Task<DialogResult> Show(string text)
		{
			return await ShowCore(null, text, string.Empty, MessageBoxButtons.OK, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
		}


		/// <summary>Displays a message box in front of the specified object and with the specified text, caption, buttons, icon, default button, and options.</summary>
		/// <param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
		/// <param name="text">The text to display in the message box.</param>
		/// <param name="caption">The text to display in the title bar of the message box.</param>
		/// <param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
		/// <param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
		/// <param name="defaultButton">One of the <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" /> values the specifies the default button for the message box.</param>
		/// <param name="options">One of the <see cref="T:System.Windows.Forms.MessageBoxOptions" /> values that specifies which display and association options will be used for the message box. You may pass in 0 if you wish to use the defaults.</param>
		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
		/// <exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
		///   <paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.  
		/// -or-  
		/// <paramref name="icon" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.  
		/// -or-  
		/// <paramref name="defaultButton" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxDefaultButton" />.</exception>
		/// <exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
		/// <exception cref="T:System.ArgumentException">		
		/// -or-  
		/// <paramref name="buttons" /> specified an invalid combination of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.</exception>
		public static async Task<DialogResult> Show(Window owner, string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton)
		{
			return await ShowCore(owner, text, caption, buttons, icon, defaultButton);
		}


		/// <summary>Displays a message box in front of the specified object and with the specified text, caption, buttons, and icon.</summary>
		/// <param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
		/// <param name="text">The text to display in the message box.</param>
		/// <param name="caption">The text to display in the title bar of the message box.</param>
		/// <param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
		/// <param name="icon">One of the <see cref="T:System.Windows.Forms.MessageBoxIcon" /> values that specifies which icon to display in the message box.</param>
		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
		/// <exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
		///   <paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.  
		/// -or-  
		/// <paramref name="icon" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxIcon" />.</exception>
		/// <exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
		public static async Task<DialogResult> Show(Window owner, string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon)
		{
			return await ShowCore(owner, text, caption, buttons, icon, MessageBoxDefaultButton.Button1);
		}

		/// <summary>Displays a message box in front of the specified object and with the specified text, caption, and buttons.</summary>
		/// <param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
		/// <param name="text">The text to display in the message box.</param>
		/// <param name="caption">The text to display in the title bar of the message box.</param>
		/// <param name="buttons">One of the <see cref="T:System.Windows.Forms.MessageBoxButtons" /> values that specifies which buttons to display in the message box.</param>
		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
		/// <exception cref="T:System.ComponentModel.InvalidEnumArgumentException">
		///   <paramref name="buttons" /> is not a member of <see cref="T:System.Windows.Forms.MessageBoxButtons" />.</exception>
		/// <exception cref="T:System.InvalidOperationException">An attempt was made to display the <see cref="T:System.Windows.Forms.MessageBox" /> in a process that is not running in User Interactive mode. This is specified by the <see cref="P:System.Windows.Forms.SystemInformation.UserInteractive" /> property.</exception>
		public static async Task<DialogResult> Show(Window owner, string text, string caption, MessageBoxButtons buttons)
		{
			return await ShowCore(owner, text, caption, buttons, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
		}

		/// <summary>Displays a message box in front of the specified object and with the specified text and caption.</summary>
		/// <param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
		/// <param name="text">The text to display in the message box.</param>
		/// <param name="caption">The text to display in the title bar of the message box.</param>
		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
		public static async Task<DialogResult> Show(Window owner, string text, string caption)
		{
			return await ShowCore(owner, text, caption, MessageBoxButtons.OK, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
		}

		/// <summary>Displays a message box in front of the specified object and with the specified text.</summary>
		/// <param name="owner">An implementation of <see cref="T:System.Windows.Forms.IWin32Window" /> that will own the modal dialog box.</param>
		/// <param name="text">The text to display in the message box.</param>
		/// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult" /> values.</returns>
		public static async Task<DialogResult> Show(Window owner, string text)
		{
			return await ShowCore(owner, text, string.Empty, MessageBoxButtons.OK, MessageBoxIcon.None, MessageBoxDefaultButton.Button1);
		}

		private static async Task<DialogResult> ShowCore(Window owner, string message, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton)
		{
			if (Avalonia.Threading.Dispatcher.UIThread.CheckAccess())
				return await ShowCore2(owner, message, caption, buttons, icon, defaultButton);
			else
				return await Avalonia.Threading.Dispatcher.UIThread.InvokeAsync(() => ShowCore2(owner, message, caption, buttons, icon, defaultButton));

		}
		private static async Task<DialogResult> ShowCore2(Window owner, string message, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton)
		{
			var dialog = new MessageBoxWindow();
			var vm = new MessageBoxViewModel(message, caption, buttons, icon, defaultButton);
			dialog.DataContext = vm;
			dialog.CanResize = false;

			var thisScreen = (owner ?? dialog).Screens.ScreenFromVisual(owner ?? dialog);
			var tbx = dialog.FindControl<TextBlock>("messageTextBlock");
			tbx.Text = message;

			var maxSize = new Size(0.6 * thisScreen.Bounds.Width - 72, 0.9 * thisScreen.Bounds.Height);

			var desiredMax = maxSize;

			//Try to minimize the TextBlock area.
			List<(double, Size)> areas = new();
			for (int i = 0; i < 20; i++)
			{
				tbx.Measure(desiredMax);

				var area = tbx.DesiredSize.Width * tbx.DesiredSize.Height;
				areas.Add((area, new Size(tbx.DesiredSize.Width, tbx.DesiredSize.Height)));

				if (tbx.DesiredSize.Height < maxSize.Height - 20)
				{
					if (desiredMax.Width / 2 < tbx.MinWidth)
						desiredMax = new Size(desiredMax.Width * 1.5 + 1, desiredMax.Height);
					else
						desiredMax = new Size(desiredMax.Width / 2, desiredMax.Height);
				}
			}

			var min = areas.Min(a => a.Item1);
			var mindim = areas.First(a => a.Item1 == min);

			var desiredSize = new Size(dialog.MinWidth - tbx.MinWidth + mindim.Item2.Width, dialog.MinHeight - tbx.MinHeight + mindim.Item2.Height);

			dialog.Width = desiredSize.Width;
			dialog.Height = desiredSize.Height;
			tbx.Width = mindim.Item2.Width;
			tbx.Height = mindim.Item2.Height;

			if (owner is null)
			{
				if (Application.Current.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
				{
					return await dialog.ShowDialog<DialogResult>(desktop.MainWindow);
				}
				else
				{
					var window = new Window
					{
						IsVisible = false,
						Height = 1,
						Width = 1,
						SystemDecorations = SystemDecorations.None,
						ShowInTaskbar = false
					};

					window.Show();
					var result = await dialog.ShowDialog<DialogResult>(window);
					window.Close();
					return result;
				}

			}
			else
			{
				return await dialog.ShowDialog<DialogResult>(owner);
			}
		}
	}
}