// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace System.Drawing;
 
public static class SystemPens
{
    private static readonly object s_systemPensKey = new();
 
    public static Pen ActiveBorder => FromSystemColor(SystemColors.ActiveBorder);
    public static Pen ActiveCaption => FromSystemColor(SystemColors.ActiveCaption);
    public static Pen ActiveCaptionText => FromSystemColor(SystemColors.ActiveCaptionText);
    public static Pen AppWorkspace => FromSystemColor(SystemColors.AppWorkspace);
 
    public static Pen ButtonFace => FromSystemColor(SystemColors.ButtonFace);
    public static Pen ButtonHighlight => FromSystemColor(SystemColors.ButtonHighlight);
 
    public static Pen ButtonShadow => FromSystemColor(SystemColors.ButtonShadow);
 
    public static Pen Control => FromSystemColor(SystemColors.Control);
    public static Pen ControlText => FromSystemColor(SystemColors.ControlText);
    public static Pen ControlDark => FromSystemColor(SystemColors.ControlDark);
    public static Pen ControlDarkDark => FromSystemColor(SystemColors.ControlDarkDark);
    public static Pen ControlLight => FromSystemColor(SystemColors.ControlLight);
    public static Pen ControlLightLight => FromSystemColor(SystemColors.ControlLightLight);
 
    public static Pen Desktop => FromSystemColor(SystemColors.Desktop);
 
    public static Pen GradientActiveCaption => FromSystemColor(SystemColors.GradientActiveCaption);
    public static Pen GradientInactiveCaption => FromSystemColor(SystemColors.GradientInactiveCaption);
    public static Pen GrayText => FromSystemColor(SystemColors.GrayText);
 
    public static Pen Highlight => FromSystemColor(SystemColors.Highlight);
    public static Pen HighlightText => FromSystemColor(SystemColors.HighlightText);
    public static Pen HotTrack => FromSystemColor(SystemColors.HotTrack);
 
    public static Pen InactiveBorder => FromSystemColor(SystemColors.InactiveBorder);
    public static Pen InactiveCaption => FromSystemColor(SystemColors.InactiveCaption);
    public static Pen InactiveCaptionText => FromSystemColor(SystemColors.InactiveCaptionText);
    public static Pen Info => FromSystemColor(SystemColors.Info);
    public static Pen InfoText => FromSystemColor(SystemColors.InfoText);
 
    public static Pen Menu => FromSystemColor(SystemColors.Menu);
    public static Pen MenuBar => FromSystemColor(SystemColors.MenuBar);
    public static Pen MenuHighlight => FromSystemColor(SystemColors.MenuHighlight);
    public static Pen MenuText => FromSystemColor(SystemColors.MenuText);
 
    public static Pen ScrollBar => FromSystemColor(SystemColors.ScrollBar);
 
    public static Pen Window => FromSystemColor(SystemColors.Window);
    public static Pen WindowFrame => FromSystemColor(SystemColors.WindowFrame);
    public static Pen WindowText => FromSystemColor(SystemColors.WindowText);
 
    public static Pen FromSystemColor(Color c)
    {
        if (!c.IsSystemColor)
        {
            throw new ArgumentException(SR.Format(SR.ColorNotSystemColor, c.ToString()));
        }
 
        if (!Gdip.ThreadData.TryGetValue(s_systemPensKey, out object? tempSystemPens) || tempSystemPens is not Pen[] systemPens)
        {
            systemPens = new Pen[(int)KnownColor.WindowText + (int)KnownColor.MenuHighlight - (int)KnownColor.YellowGreen];
            Gdip.ThreadData[s_systemPensKey] = systemPens;
        }
 
        int idx = (int)c.ToKnownColor();
        if (idx > (int)KnownColor.YellowGreen)
        {
            idx -= (int)KnownColor.YellowGreen - (int)KnownColor.WindowText;
        }
 
        idx--;
        Debug.Assert(idx >= 0 && idx < systemPens.Length, "System colors have been added but our system color array has not been expanded.");
 
        return systemPens[idx] ??= new Pen(c, true);
    }
}