using System.Windows.Markup;

using WPFluent.Controls;

namespace WPFluent.Markup;

/// <summary>
/// Custom <see cref="MarkupExtension"/> which can provide <see cref="FontIcon"/>.
/// </summary>
/// <example>
/// <code lang="xml"> /// &lt;ui:Button ///     Appearance="Primary" ///     Content="WPF UI button with font icon" /// 
///    Icon="{ui:FontIcon '&#x1F308;'}" /&gt; ///</code> <code lang="xml"> /// &lt;ui:Button Icon="{ui:FontIcon
/// '&amp;#x1F308;'}" /&gt; ///</code> <code lang="xml"> /// &lt;ui:HyperlinkButton Icon="{ui:FontIcon '&amp;#x1F308;'}"
/// /&gt; ///</code> <code lang="xml"> /// &lt;ui:TitleBar Icon="{ui:FontIcon '&amp;#x1F308;'}" /&gt; ///</code>
/// </example>
[ContentProperty(nameof(Glyph))]
[MarkupExtensionReturnType(typeof(FontIcon))]
public class FontIconExtension : MarkupExtension
{
    public FontIconExtension()
    {
    }

    public FontIconExtension(string glyph) { Glyph = glyph; }

    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        FontIcon fontIcon = new() { Glyph = Glyph!, FontFamily = FontFamily };

        if (FontSize > 0)
        {
            fontIcon.FontSize = FontSize;
        }

        return fontIcon;
    }

    [ConstructorArgument("fontFamily")]
    public FontFamily FontFamily { get; set; } = new("FluentSystemIcons");

    public double FontSize { get; set; }

    [ConstructorArgument("glyph")]
    public string? Glyph { get; set; }
}