namespace Eto.Forms.ThemedControls;

/// <summary>
/// A themed handler for the <see cref="AboutDialog"/> dialog.
/// </summary>
public class ThemedAboutDialogHandler : WidgetHandler<Dialog, AboutDialog, AboutDialog.ICallback>, AboutDialog.IHandler
{
	string[] designers, developers, documenters;
	string license;
	DynamicLayout layout;
	ImageView image;
	Label labelCopyright, labelProgramName, labelProgramDescription, labelVersion;
	LinkButton linkWebsite;
	Uri uriWebsite;

	/// <summary>
	/// Initializes a new instance of the <see cref="T:Eto.Forms.ThemedControls.AboutDialogHandler"/> class.
	/// </summary>
	public ThemedAboutDialogHandler()
	{
		Control = new Dialog();
		Control.Width = 500;
		Control.Height = 350;

		layout = new DynamicLayout();
		layout.Padding = new Padding(10);

		var layout2 = new DynamicLayout();
		layout2.DefaultSpacing = new Size(5, 5);
		layout2.BeginHorizontal();

		image = new ImageView();
		layout2.Add(image);

		var layout3 = new DynamicLayout();
		layout3.DefaultSpacing = new Size(5, 5);

		labelProgramName = new Label();
		labelProgramName.Font = SystemFonts.Bold(SystemFonts.Default().Size + 4);
		labelProgramName.VerticalAlignment = VerticalAlignment.Center;
		layout3.Add(labelProgramName);

		labelVersion = new Label();
		labelVersion.VerticalAlignment = VerticalAlignment.Center;
		layout3.Add(labelVersion);

		labelProgramDescription = new Label();
		labelProgramDescription.VerticalAlignment = VerticalAlignment.Center;
		layout3.Add(labelProgramDescription);

		linkWebsite = new LinkButton();
		linkWebsite.Click += LinkWebsite_Click;
		layout3.Add(linkWebsite);

		layout3.Add(null, true, true);

		layout2.Add(layout3, true);

		layout.Add(layout2, true, true);

		labelCopyright = new Label();
		labelCopyright.VerticalAlignment = VerticalAlignment.Center;
		layout.Add(labelCopyright);
	}

	private void LinkWebsite_Click(object sender, EventArgs e)
	{
		if (uriWebsite != null)
			Application.Instance.Open(uriWebsite.ToString());
	}

	/// <summary>
	/// Gets or sets the copyright text.
	/// </summary>
	/// <value>The copyright text.</value>
	public string Copyright
	{
		get { return labelCopyright.Text; }
		set { labelCopyright.Text = value; }
	}

	/// <summary>
	/// Gets or sets the list of graphical designers.
	/// </summary>
	/// <value>The list of graphical designers.</value>
	/// <seealso cref="Developers"/>
	/// <seealso cref="Documenters"/>
	public string[] Designers
	{
		get { return designers; }
		set { designers = value; }
	}

	/// <summary>
	/// Gets or sets the list of developers.
	/// </summary>
	/// <value>The list of developers.</value>
	/// <seealso cref="Designers"/>
	/// <seealso cref="Documenters"/>
	public string[] Developers
	{
		get { return developers; }
		set { developers = value; }
	}

	/// <summary>
	/// Gets or sets the list of documenters.
	/// </summary>
	/// <value>The list of documenters.</value>
	/// <seealso cref="Designers"/>
	/// <seealso cref="Developers"/>
	public string[] Documenters
	{
		get { return documenters; }
		set { documenters = value; }
	}

	/// <summary>
	/// Gets or sets the license.
	/// </summary>
	/// <value>The license.</value>
	public string License
	{
		get { return license; }
		set { license = value; }
	}

	/// <summary>
	/// Gets or sets the application logo.
	/// </summary>
	/// <value>The application logo.</value>
	public Image Logo
	{
		get { return image.Image; }
		set { image.Image = value; }
	}

	/// <summary>
	/// Gets or sets the program description.
	/// </summary>
	/// <value>The program description.</value>
	public string ProgramDescription
	{
		get { return labelProgramDescription.Text; }
		set { labelProgramDescription.Text = value; }
	}

	/// <summary>
	/// Gets or sets the name of the program.
	/// </summary>
	/// <value>The name of the program.</value>
	public string ProgramName
	{
		get { return labelProgramName.Text; }
		set { labelProgramName.Text = value; }
	}

	/// <summary>
	/// Gets or sets the window title.
	/// </summary>
	/// <value>The window title.</value>
	public string Title
	{
		get { return Control.Title; }
		set { Control.Title = value; }
	}

	/// <summary>
	/// Gets or sets the application version.
	/// </summary>
	/// <value>The application version.</value>
	public string Version
	{
		get { return labelVersion.Text; }
		set { labelVersion.Text = value; }
	}

	/// <summary>
	/// Gets or sets the application website.
	/// </summary>
	/// <value>The application website.</value>
	public Uri Website
	{
		get { return uriWebsite; }
		set { uriWebsite = value; }
	}

	/// <summary>
	/// Gets or sets the application website label.
	/// </summary>
	/// <value>The application website label.</value>
	public string WebsiteLabel
	{
		get { return linkWebsite.Text; }
		set { linkWebsite.Text = value; }
	}

	/// <summary>
	/// Shows the dialog.
	/// </summary>
	/// <returns>The dialog result.</returns>
	/// <param name="parent">The parent window.</param>
	public DialogResult ShowDialog(Window parent)
	{
		var textArea1 = new TextArea();
		textArea1.ReadOnly = true;

		var textArea2 = new TextArea();
		textArea2.ReadOnly = true;

		if (developers != null && developers.Length != 0)
			textArea1.Text += Application.Instance.Localize(Widget, "Developers:") + Environment.NewLine + string.Join(Environment.NewLine, developers) + Environment.NewLine + Environment.NewLine;
		if (designers != null && designers.Length != 0)
			textArea1.Text += Application.Instance.Localize(Widget, "Designers:") + Environment.NewLine + string.Join(Environment.NewLine, designers) + Environment.NewLine + Environment.NewLine;
		if (documenters != null && documenters.Length != 0)
			textArea1.Text += Application.Instance.Localize(Widget, "Documenters:") + Environment.NewLine + string.Join(Environment.NewLine, documenters) + Environment.NewLine + Environment.NewLine;
		textArea1.Text = textArea1.Text.TrimEnd(Environment.NewLine.ToCharArray());

		if (!string.IsNullOrEmpty(license))
			textArea2.Text = license;

		layout.Parent?.Remove(layout);

		if (string.IsNullOrEmpty(textArea1.Text) && string.IsNullOrEmpty(textArea2.Text))
			Control.Content = layout;
		else
		{
			var tabControl = new TabControl();

			tabControl.Pages.Add(new TabPage(layout) { Text = Application.Instance.Localize(Widget, "About") });

			if (!string.IsNullOrEmpty(textArea1.Text))
				tabControl.Pages.Add(new TabPage(textArea1) { Text = Application.Instance.Localize(Widget, "Credits") });

			if (!string.IsNullOrEmpty(textArea2.Text))
				tabControl.Pages.Add(new TabPage(textArea2) { Text = Application.Instance.Localize(Widget, "License") });

			Control.Content = tabControl;
		}

		Control.ShowModal(parent);

		return DialogResult.Cancel;
	}
}