@inherits LocalizableComponentBase

@* Nerd stats on hover or focus: a DTooltip whose content is a monospace list of label/value rows. OnOpen runs on the
   first hover or focus, for stats read on demand (a post's provenance); rows with no value are left out. *@
<DTooltip Placement="Placement" Align="Align" class="@Class" TipContent="Body" @onmouseenter="Open" @onfocusin="Open">
	@ChildContent
</DTooltip>

@code {
	[Parameter] public RenderFragment ChildContent { get; set; }
	[Parameter] public string Heading { get; set; }
	[Parameter] public IEnumerable<NerdRow> Rows { get; set; } = [];
	/// <summary>Shown under the rows while OnOpen's work runs.</summary>
	[Parameter] public bool Pending { get; set; }
	[Parameter] public EventCallback OnOpen { get; set; }
	[Parameter] public DTooltipPlacement Placement { get; set; }
	[Parameter] public DTooltipAlign Align { get; set; }
	[Parameter] public string Class { get; set; }

	bool opened;

	protected override void OnInitialized() => IsLoading = false;

	async Task Open()
	{
		if (opened || !OnOpen.HasDelegate)
			return;
		opened = true;
		await OnOpen.InvokeAsync();
	}

	RenderFragment Body => @<div class="nerd-stats flex flex-col gap-1 text-left font-mono text-[11px] leading-tight max-w-80">
		@if (Heading is { Length: > 0 })
		{
			<p class="font-bold opacity-80">@Heading</p>
		}
		<dl class="grid grid-cols-[auto_minmax(0,1fr)] gap-x-2 gap-y-0.5">
			@foreach (var row in Rows.Where(row => !string.IsNullOrEmpty(row.Value)))
			{
				<dt class="opacity-60 whitespace-nowrap">@row.Label</dt>
				<dd class="break-all">@row.Value</dd>
			}
		</dl>
		@if (Pending)
		{
			<p class="opacity-60">@Localizer["loading"]…</p>
		}
	</div>;
}