/// <summary>
///     Provides a curated set of Lucide SVG icons for use in the default theme.
///     Icons are 24x24 with stroke-based rendering (stroke="currentColor", stroke-width="2").
/// </summary>
public static class LucideIcons
{
    private static readonly Dictionary<string, string> _icons = new(StringComparer.OrdinalIgnoreCase)
    {
        // Navigation & UI
        ["home"] = Svg("<path d='m3 9 9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z'/><polyline points='9 22 9 12 15 12 15 22'/>"),
        ["menu"] = Svg("<line x1='4' x2='20' y1='12' y2='12'/><line x1='4' x2='20' y1='6' y2='6'/><line x1='4' x2='20' y1='18' y2='18'/>"),
        ["search"] = Svg("<circle cx='11' cy='11' r='8'/><path d='m21 21-4.3-4.3'/>"),
        ["settings"] = Svg("<path d='M12.22 2h-.44a2 2 0 0 0-2 2v.18a2 2 0 0 1-1 1.73l-.43.25a2 2 0 0 1-2 0l-.15-.08a2 2 0 0 0-2.73.73l-.22.38a2 2 0 0 0 .73 2.73l.15.1a2 2 0 0 1 1 1.72v.51a2 2 0 0 1-1 1.74l-.15.09a2 2 0 0 0-.73 2.73l.22.38a2 2 0 0 0 2.73.73l.15-.08a2 2 0 0 1 2 0l.43.25a2 2 0 0 1 1 1.73V20a2 2 0 0 0 2 2h.44a2 2 0 0 0 2-2v-.18a2 2 0 0 1 1-1.73l.43-.25a2 2 0 0 1 2 0l.15.08a2 2 0 0 0 2.73-.73l.22-.39a2 2 0 0 0-.73-2.73l-.15-.08a2 2 0 0 1-1-1.74v-.5a2 2 0 0 1 1-1.74l.15-.09a2 2 0 0 0 .73-2.73l-.22-.38a2 2 0 0 0-2.73-.73l-.15.08a2 2 0 0 1-2 0l-.43-.25a2 2 0 0 1-1-1.73V4a2 2 0 0 0-2-2z'/><circle cx='12' cy='12' r='3'/>"),
        ["arrow-left"] = Svg("<path d='m12 19-7-7 7-7'/><path d='M19 12H5'/>"),
        ["arrow-right"] = Svg("<path d='M5 12h14'/><path d='m12 5 7 7-7 7'/>"),
        ["chevron-right"] = Svg("<path d='m9 18 6-6-6-6'/>"),
        ["chevron-down"] = Svg("<path d='m6 9 6 6 6-6'/>"),
        ["external-link"] = Svg("<path d='M15 3h6v6'/><path d='M10 14 21 3'/><path d='M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6'/>"),
        // Content & Documentation
        ["book"] = Svg("<path d='M4 19.5v-15A2.5 2.5 0 0 1 6.5 2H19a1 1 0 0 1 1 1v18a1 1 0 0 1-1 1H6.5a1 1 0 0 1 0-5H20'/>"),
        ["book-open"] = Svg("<path d='M2 3h6a4 4 0 0 1 4 4v14a3 3 0 0 0-3-3H2z'/><path d='M22 3h-6a4 4 0 0 0-4 4v14a3 3 0 0 1 3-3h7z'/>"),
        ["file"] = Svg("<path d='M15 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V7Z'/><path d='M14 2v4a2 2 0 0 0 2 2h4'/>"),
        ["file-text"] = Svg("<path d='M15 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V7Z'/><path d='M14 2v4a2 2 0 0 0 2 2h4'/><line x1='16' x2='8' y1='13' y2='13'/><line x1='16' x2='8' y1='17' y2='17'/><line x1='10' x2='8' y1='9' y2='9'/>"),
        ["file-code"] = Svg("<path d='M15 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V7Z'/><path d='M14 2v4a2 2 0 0 0 2 2h4'/><path d='m10 13-2 2 2 2'/><path d='m14 17 2-2-2-2'/>"),
        ["folder"] = Svg("<path d='M20 20a2 2 0 0 0 2-2V8a2 2 0 0 0-2-2h-7.9a2 2 0 0 1-1.69-.9L9.6 3.9A2 2 0 0 0 7.93 3H4a2 2 0 0 0-2 2v13a2 2 0 0 0 2 2Z'/>"),
        ["newspaper"] = Svg("<path d='M4 22h16a2 2 0 0 0 2-2V4a2 2 0 0 0-2-2H8a2 2 0 0 0-2 2v16a2 2 0 0 1-2 2Zm0 0a2 2 0 0 1-2-2v-9c0-1.1.9-2 2-2h2'/><path d='M18 14h-8'/><path d='M15 18h-5'/><path d='M10 6h8v4h-8V6Z'/>"),
        ["scroll-text"] = Svg("<path d='M15 12h-5'/><path d='M15 8h-5'/><path d='M19 17V5a2 2 0 0 0-2-2H4'/><path d='M8 21h12a2 2 0 0 0 2-2v-1a1 1 0 0 0-1-1H11a1 1 0 0 0-1 1v1a2 2 0 1 1-4 0V5a2 2 0 1 0-4 0v2'/>"),
        // Development & Code
        ["code"] = Svg("<polyline points='16 18 22 12 16 6'/><polyline points='8 6 2 12 8 18'/>"),
        ["code-2"] = Svg("<path d='m18 16 4-4-4-4'/><path d='m6 8-4 4 4 4'/><path d='m14.5 4-5 16'/>"),
        ["terminal"] = Svg("<polyline points='4 17 10 11 4 5'/><line x1='12' x2='20' y1='19' y2='19'/>"),
        ["braces"] = Svg("<path d='M8 3H7a2 2 0 0 0-2 2v5a2 2 0 0 1-2 2 2 2 0 0 1 2 2v5c0 1.1.9 2 2 2h1'/><path d='M16 21h1a2 2 0 0 0 2-2v-5c0-1.1.9-2 2-2a2 2 0 0 1-2-2V5a2 2 0 0 0-2-2h-1'/>"),
        ["cpu"] = Svg("<rect width='16' height='16' x='4' y='4' rx='2'/><rect width='6' height='6' x='9' y='9' rx='1'/><path d='M15 2v2'/><path d='M15 20v2'/><path d='M2 15h2'/><path d='M2 9h2'/><path d='M20 15h2'/><path d='M20 9h2'/><path d='M9 2v2'/><path d='M9 20v2'/>"),
        ["database"] = Svg("<ellipse cx='12' cy='5' rx='9' ry='3'/><path d='M3 5V19A9 3 0 0 0 21 19V5'/><path d='M3 12A9 3 0 0 0 21 12'/>"),
        ["git-branch"] = Svg("<line x1='6' x2='6' y1='3' y2='15'/><circle cx='18' cy='6' r='3'/><circle cx='6' cy='18' r='3'/><path d='M18 9a9 9 0 0 1-9 9'/>"),
        ["package"] = Svg("<path d='m7.5 4.27 9 5.15'/><path d='M21 8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16Z'/><path d='m3.3 7 8.7 5 8.7-5'/><path d='M12 22V12'/>"),
        ["puzzle"] = Svg("<path d='M19.439 7.85c-.049.322.059.648.289.878l1.568 1.568c.47.47.706 1.087.706 1.704s-.235 1.233-.706 1.704l-1.611 1.611a.98.98 0 0 1-.837.276c-.47-.07-.802-.48-.968-.925a2.501 2.501 0 1 0-3.214 3.214c.446.166.855.497.925.968a.979.979 0 0 1-.276.837l-1.61 1.61a2.404 2.404 0 0 1-1.705.707 2.402 2.402 0 0 1-1.704-.706l-1.568-1.568a1.026 1.026 0 0 0-.877-.29c-.493.074-.84.504-1.02.968a2.5 2.5 0 1 1-3.237-3.237c.464-.18.894-.527.967-1.02a1.026 1.026 0 0 0-.289-.877l-1.568-1.568A2.402 2.402 0 0 1 1.998 12c0-.617.236-1.234.706-1.704L4.23 8.77c.24-.24.581-.353.917-.303.515.077.877.528 1.073 1.01a2.5 2.5 0 1 0 3.259-3.259c-.482-.196-.933-.558-1.01-1.073-.05-.336.062-.676.303-.917l1.525-1.525A2.402 2.402 0 0 1 12 1.998c.617 0 1.234.236 1.704.706l1.568 1.568c.23.23.556.338.877.29.493-.074.84-.504 1.02-.968a2.5 2.5 0 1 1 3.237 3.237c-.464.18-.894.527-.967 1.02Z'/>"),
        // Actions & Status
        ["rocket"] = Svg("<path d='M4.5 16.5c-1.5 1.26-2 5-2 5s3.74-.5 5-2c.71-.84.7-2.13-.09-2.91a2.18 2.18 0 0 0-2.91-.09Z'/><path d='m12 15-3-3a22 22 0 0 1 2-3.95A12.88 12.88 0 0 1 22 2c0 2.72-.78 7.5-6 11a22.35 22.35 0 0 1-4 2Z'/><path d='M9 12H4s.55-3.03 2-4c1.62-1.08 5 0 5 0'/><path d='M12 15v5s3.03-.55 4-2c1.08-1.62 0-5 0-5'/>"),
        ["zap"] = Svg("<path d='M4 14a1 1 0 0 1-.78-1.63l9.9-10.2a.5.5 0 0 1 .86.46l-1.92 6.02A1 1 0 0 0 13 10h7a1 1 0 0 1 .78 1.63l-9.9 10.2a.5.5 0 0 1-.86-.46l1.92-6.02A1 1 0 0 0 11 14z'/>"),
        ["check"] = Svg("<path d='M20 6 9 17l-5-5'/>"),
        ["x"] = Svg("<path d='M18 6 6 18'/><path d='m6 6 12 12'/>"),
        ["alert-triangle"] = Svg("<path d='m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3'/><path d='M12 9v4'/><path d='M12 17h.01'/>"),
        ["info"] = Svg("<circle cx='12' cy='12' r='10'/><path d='M12 16v-4'/><path d='M12 8h.01'/>"),
        ["lightbulb"] = Svg("<path d='M15 14c.2-1 .7-1.7 1.5-2.5 1-.9 1.5-2.2 1.5-3.5A6 6 0 0 0 6 8c0 1 .2 2.2 1.5 3.5.7.7 1.3 1.5 1.5 2.5'/><path d='M9 18h6'/><path d='M10 22h4'/>"),
        ["star"] = Svg("<polygon points='12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2'/>"),
        ["heart"] = Svg("<path d='M19 14c1.49-1.46 3-3.21 3-5.5A5.5 5.5 0 0 0 16.5 3c-1.76 0-3 .5-4.5 2-1.5-1.5-2.74-2-4.5-2A5.5 5.5 0 0 0 2 8.5c0 2.3 1.5 4.05 3 5.5l7 7Z'/>"),
        ["download"] = Svg("<path d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/><polyline points='7 10 12 15 17 10'/><line x1='12' x2='12' y1='15' y2='3'/>"),
        ["upload"] = Svg("<path d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/><polyline points='17 8 12 3 7 8'/><line x1='12' x2='12' y1='3' y2='15'/>"),
        // Communication & Social
        ["mail"] = Svg("<rect width='20' height='16' x='2' y='4' rx='2'/><path d='m22 7-8.97 5.7a1.94 1.94 0 0 1-2.06 0L2 7'/>"),
        ["message-circle"] = Svg("<path d='M7.9 20A9 9 0 1 0 4 16.1L2 22Z'/>"),
        ["globe"] = Svg("<circle cx='12' cy='12' r='10'/><path d='M12 2a14.5 14.5 0 0 0 0 20 14.5 14.5 0 0 0 0-20'/><path d='M2 12h20'/>"),
        ["users"] = Svg("<path d='M16 21v-2a4 4 0 0 0-4-4H6a4 4 0 0 0-4 4v2'/><circle cx='9' cy='7' r='4'/><path d='M22 21v-2a4 4 0 0 0-3-3.87'/><path d='M16 3.13a4 4 0 0 1 0 7.75'/>"),
        ["link"] = Svg("<path d='M10 13a5 5 0 0 0 7.54.54l3-3a5 5 0 0 0-7.07-7.07l-1.72 1.71'/><path d='M14 11a5 5 0 0 0-7.54-.54l-3 3a5 5 0 0 0 7.07 7.07l1.71-1.71'/>"),
        ["github"] = Svg("<path d='M15 22v-4a4.8 4.8 0 0 0-1-3.5c3 0 6-2 6-5.5.08-1.25-.27-2.48-1-3.5.28-1.15.28-2.35 0-3.5 0 0-1 0-3 1.5-2.64-.5-5.36-.5-8 0C6 2 5 2 5 2c-.3 1.15-.3 2.35 0 3.5A5.403 5.403 0 0 0 4 9c0 3.5 3 5.5 6 5.5-.39.49-.68 1.05-.85 1.65-.17.6-.22 1.23-.15 1.85v4'/><path d='M9 18c-4.51 2-5-2-7-2'/>"),
        ["twitter"] = Svg("<path d='M22 4s-.7 2.1-2 3.4c1.6 10-9.4 17.3-18 11.6 2.2.1 4.4-.6 6-2C3 15.5.5 9.6 3 5c2.2 2.6 5.6 4.1 9 4-.9-4.2 4-6.6 7-3.8 1.1 0 3-1.2 3-1.2z'/>"),
        ["nuget"] = """<svg class="icon" xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 512 512" fill="currentColor"><path d="M374.4,461C327.7,461,289.8,423,289.8,376.2c0-46.7,37.9-84.7,84.7-84.7s84.7,37.9,84.7,84.7C459.1,423,421.2,461,374.4,461M205.6,266.8c-29.2,0-52.9-23.7-52.9-52.9s23.7-52.9,52.9-52.9s52.9,23.7,52.9,52.9S234.8,266.8,205.6,266.8M378.2,101.6H236.9c-72,0-130.4,58.4-130.4,130.4v141.3c0,72,58.4,130.4,130.4,130.4h141.3c72,0,130.4-58.4,130.4-130.4V232.1C508.6,160.1,450.2,101.6,378.2,101.6"/><circle cx="42.3" cy="49.7" r="42.3"/></svg>""",
        ["discord"] = Svg("<path d='M9.09 9a3 3 0 0 0-2.83 2M14.91 9a3 3 0 0 1 2.83 2'/><path d='M8 17h.01M16 17h.01'/><path d='M20.2 7.8l-2.6-2.1A3.7 3.7 0 0 0 15.2 5H8.8a3.7 3.7 0 0 0-2.4.7L3.8 7.8A2 2 0 0 0 3 9.5V15a2 2 0 0 0 2 2h1l1 2h10l1-2h1a2 2 0 0 0 2-2V9.5a2 2 0 0 0-.8-1.7z'/>"),
        // Objects & Misc
        ["shield"] = Svg("<path d='M20 13c0 5-3.5 7.5-7.66 8.95a1 1 0 0 1-.67-.01C7.5 20.5 4 18 4 13V6a1 1 0 0 1 1-1c2 0 4.5-1.2 6.24-2.72a1.17 1.17 0 0 1 1.52 0C14.51 3.81 17 5 19 5a1 1 0 0 1 1 1z'/>"),
        ["key"] = Svg("<path d='m15.5 7.5 2.3 2.3a1 1 0 0 0 1.4 0l2.1-2.1a1 1 0 0 0 0-1.4L19 4'/><path d='m21 2-9.6 9.6'/><circle cx='7.5' cy='15.5' r='5.5'/>"),
        ["lock"] = Svg("<rect width='18' height='11' x='3' y='11' rx='2' ry='2'/><path d='M7 11V7a5 5 0 0 1 10 0v4'/>"),
        ["clock"] = Svg("<circle cx='12' cy='12' r='10'/><polyline points='12 6 12 12 16 14'/>"),
        ["calendar"] = Svg("<path d='M8 2v4'/><path d='M16 2v4'/><rect width='18' height='18' x='3' y='4' rx='2'/><path d='M3 10h18'/>"),
        ["image"] = Svg("<rect width='18' height='18' x='3' y='3' rx='2' ry='2'/><circle cx='9' cy='9' r='2'/><path d='m21 15-3.086-3.086a2 2 0 0 0-2.828 0L6 21'/>"),
        ["play"] = Svg("<polygon points='6 3 20 12 6 21 6 3'/>"),
        ["list"] = Svg("<line x1='8' x2='21' y1='6' y2='6'/><line x1='8' x2='21' y1='12' y2='12'/><line x1='8' x2='21' y1='18' y2='18'/><line x1='3' x2='3.01' y1='6' y2='6'/><line x1='3' x2='3.01' y1='12' y2='12'/><line x1='3' x2='3.01' y1='18' y2='18'/>"),
        ["layers"] = Svg("<path d='m12.83 2.18a2 2 0 0 0-1.66 0L2.6 6.08a1 1 0 0 0 0 1.83l8.58 3.91a2 2 0 0 0 1.66 0l8.58-3.9a1 1 0 0 0 0-1.83Z'/><path d='m22 17.65-9.17 4.16a2 2 0 0 1-1.66 0L2 17.65'/><path d='m22 12.65-9.17 4.16a2 2 0 0 1-1.66 0L2 12.65'/>"),
        ["tag"] = Svg("<path d='M12.586 2.586A2 2 0 0 0 11.172 2H4a2 2 0 0 0-2 2v7.172a2 2 0 0 0 .586 1.414l8.704 8.704a2.426 2.426 0 0 0 3.42 0l6.58-6.58a2.426 2.426 0 0 0 0-3.42z'/><circle cx='7.5' cy='7.5' r='.5' fill='currentColor'/>"),
        ["wrench"] = Svg("<path d='M14.7 6.3a1 1 0 0 0 0 1.4l1.6 1.6a1 1 0 0 0 1.4 0l3.77-3.77a6 6 0 0 1-7.94 7.94l-6.91 6.91a2.12 2.12 0 0 1-3-3l6.91-6.91a6 6 0 0 1 7.94-7.94l-3.76 3.76z'/>"),
        ["box"] = Svg("<path d='M21 8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16Z'/><path d='m3.3 7 8.7 5 8.7-5'/><path d='M12 22V12'/>"),
        ["compass"] = Svg("<circle cx='12' cy='12' r='10'/><polygon points='16.24 7.76 14.12 14.12 7.76 16.24 9.88 9.88 16.24 7.76'/>"),
        ["map"] = Svg("<path d='M14.106 5.553a2 2 0 0 0 1.788 0l3.659-1.83A1 1 0 0 1 21 4.619v12.764a1 1 0 0 1-.553.894l-4.553 2.277a2 2 0 0 1-1.788 0l-4.212-2.106a2 2 0 0 0-1.788 0l-3.659 1.83A1 1 0 0 1 3 19.381V6.618a1 1 0 0 1 .553-.894l4.553-2.277a2 2 0 0 1 1.788 0z'/><path d='M15 5.764v15'/><path d='M9 3.236v15'/>")
    };
    /// <summary>
    ///     Gets all available icon names.
    /// </summary>
    public static IEnumerable<string> AllNames => _icons.Keys;

    /// <summary>
    ///     Gets the SVG markup for a named icon, or <c>null</c> if not found.
    /// </summary>
    public static string? Get(string name) => _icons.GetValueOrDefault(name.ToLowerInvariant());
    private static string Svg(string paths)
    {
        return $"""<svg class="icon" xmlns="http://www.w3.org/2000/svg" width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">{paths}</svg>""";
    }
}