@inherits DComponentBase

@* daisyUI Megamenu: https://daisyui.com/components/megamenu/ . Built on the native popover API, as daisyUI specifies:
   each DMegamenuItem renders a button and the popover it opens (per-instance ids), so opening, light dismiss and
   Escape are the browser's. The root is a popover too: with Responsive it turns, below sm, into a vertical menu that
   the toggle button opens. daisyUI supports at most 10 items. text-inherit undoes the browser's popover CanvasText
   colour, which daisyUI resets for dropdowns but not here. *@
@if (Responsive || Direction == DDirection.Vertical)
{
	<button type="button" class="@Cx("btn", Direction == DDirection.Vertical ? null : "sm:hidden", ToggleClass)" popovertarget="@uid">
		@ToggleText
	</button>
}
<div @attributes="AdditionalAttributes" id="@uid" popover class="@CssClass">
	<span class="megamenu-active"></span>
	@ChildContent
</div>

@code {
	/// <summary>The DMegamenuItem children.</summary>
	[Parameter] public RenderFragment ChildContent { get; set; }
	[Parameter] public DMegamenuPanelWidth PanelWidth { get; set; }
	[Parameter] public DSize Size { get; set; }
	/// <summary>
	/// Vertical (megamenu-vertical) hides the menu until the toggle button opens it, at every width. With Horizontal
	/// that happens only below sm when Responsive is set.
	/// </summary>
	[Parameter] public DDirection Direction { get; set; }
	/// <summary>Below sm, hide the menu and show the toggle button that opens it vertically (max-sm:megamenu-vertical).</summary>
	[Parameter] public bool Responsive { get; set; } = true;
	[Parameter] public string ToggleText { get; set; } = "Menu";
	[Parameter] public string ToggleClass { get; set; }

	readonly string uid = "d" + Guid.NewGuid().ToString("N")[..8];

	string CssClass => Cx("megamenu text-inherit", DirectionClass, PanelWidthClass, SizeClass, Class);

	string DirectionClass => Direction == DDirection.Vertical ? "megamenu-vertical" : Responsive ? "max-sm:megamenu-vertical" : null;

	string PanelWidthClass => PanelWidth switch
	{
		DMegamenuPanelWidth.Wide => "megamenu-wide",
		DMegamenuPanelWidth.Full => "megamenu-full",
		_ => null
	};

	string SizeClass => Size switch
	{
		DSize.Xs => "megamenu-xs",
		DSize.Sm => "megamenu-sm",
		DSize.Lg => "megamenu-lg",
		DSize.Xl => "megamenu-xl",
		_ => null
	};
}