using Avalonia;
using Avalonia.Controls;
using Avalonia.Controls.ApplicationLifetimes;
using DataLayer;
using Dinah.Core.Logging;
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);
		}

		public static async Task VerboseLoggingWarning_ShowIfTrue()
		{
			// when turning on debug (and especially Verbose) to share logs, some privacy settings may not be obscured
			if (Serilog.Log.Logger.IsVerboseEnabled())
				await Show(@"
Warning: verbose logging is enabled.

This should be used for debugging only. It creates many
more logs and debug files, neither of which are as
strictly anonymous.

When you are finished debugging, it's highly recommended
to set your debug MinimumLevel to Information and restart
Libation.
".Trim(), "Verbose logging enabled", MessageBoxButtons.OK, MessageBoxIcon.Warning);
		}

		public static async Task<DialogResult> ShowConfirmationDialog(Window owner, IEnumerable<LibraryBook> libraryBooks, string format, string title, MessageBoxDefaultButton defaultButton = MessageBoxDefaultButton.Button1)
		{
			if (libraryBooks is null || !libraryBooks.Any())
				return DialogResult.Cancel;

			var count = libraryBooks.Count();

			string thisThese = count > 1 ? "these" : "this";
			string bookBooks = count > 1 ? "books" : "book";
			string titlesAgg = libraryBooks.AggregateTitles();

			var message
				= string.Format(format, $"{thisThese} {count} {bookBooks}")
				+ $"\r\n\r\n{titlesAgg}";

			return await ShowCore(owner, 
				message,
				title,
				MessageBoxButtons.YesNo,
				MessageBoxIcon.Question,
				defaultButton);
		}

		/// <summary>
		/// Logs error. Displays a message box dialog with specified text and caption.
		/// </summary>
		/// <param name="synchronizeInvoke">Form calling this method.</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="exception">Exception to log.</param>
		public static async Task ShowAdminAlert(Window owner, string text, string caption, Exception exception)
		{
			// for development and debugging, show me what broke!
			if (System.Diagnostics.Debugger.IsAttached)
				throw exception;

			try
			{
				Serilog.Log.Logger.Error(exception, "Alert admin error: {@DebugText}", new { text, caption });
			}
			catch { }

			var form = new MessageBoxAlertAdminDialog(text, caption, exception);

			await DisplayWindow(form, owner);
		}


		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();

			dialog.HideMinMaxBtns();

			var vm = new MessageBoxViewModel(message, caption, buttons, icon, defaultButton);
			dialog.DataContext = vm;
			dialog.ControlToFocusOnShow = dialog.FindControl<Control>(defaultButton.ToString());
			dialog.CanResize = false;
			dialog.WindowStartupLocation = WindowStartupLocation.CenterOwner;
			var tbx = dialog.FindControl<TextBlock>("messageTextBlock");

			tbx.MinWidth = vm.TextBlockMinWidth;
			tbx.Text = message;

			var thisScreen = (owner ?? dialog).Screens.ScreenFromVisual(owner ?? dialog);

			var maxSize = new Size(0.20 * thisScreen.Bounds.Width, 0.9 * thisScreen.Bounds.Height - 55);

			var desiredMax = new Size(maxSize.Width, maxSize.Height);

			tbx.Measure(desiredMax);

			tbx.Height = tbx.DesiredSize.Height;
			tbx.Width = tbx.DesiredSize.Width;
			dialog.MinHeight = vm.FormHeightFromTboxHeight((int)tbx.DesiredSize.Height);
			dialog.MinWidth = vm.FormWidthFromTboxWidth((int)tbx.DesiredSize.Width);
			dialog.MaxHeight = dialog.MinHeight;
			dialog.MaxWidth = dialog.MinWidth;
			dialog.Height = dialog.MinHeight;
			dialog.Width = dialog.MinWidth;

			return await DisplayWindow(dialog, owner);
		}
		private static async Task<DialogResult> DisplayWindow(Window toDisplay, Window owner)
		{
			if (owner is null)
			{
				if (Application.Current.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
				{
					return await toDisplay.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 toDisplay.ShowDialog<DialogResult>(window);
					window.Close();
					return result;
				}

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

	}
}