@inherits LocalizableComponentBase

@* Nerd stats on hover or focus: a DTooltip whose content is the rows (NerdRows). A touch screen has no hover, so there
   a tap opens the same rows in a sheet from the bottom (TapOpens; not for a trigger that is a link itself, the
   pictures). OnOpen runs on the first hover, focus or tap, for stats read on demand (a post's provenance). *@
@if (TapOpens)
{
	@* (on touch the trigger is at least 44px: daisyUI's tooltip draws its arrow with ::after, so padding-free min sizes) *@
	<DTooltip Placement="Placement" Align="Align" class="@($"{Class} pointer-coarse:inline-flex pointer-coarse:items-center pointer-coarse:min-h-11 pointer-coarse:min-w-11")"
			  TipContent="Body" @onmouseenter="Open" @onfocusin="Open" @onclick="Tap"
			  tabindex="0" role="button" aria-haspopup="dialog" aria-label="@Heading">
		@ChildContent
	</DTooltip>
}
else
{
	<DTooltip Placement="Placement" Align="Align" class="@Class" TipContent="Body" @onmouseenter="Open" @onfocusin="Open">
		@ChildContent
	</DTooltip>
}
@if (isSheetOpen)
{
	<DModal Placement="DModalPlacement.ResponsiveBottom" IsOpen="true" IsOpenChanged="open => isSheetOpen = open" CloseText="@Localizer["Close"]" data-nerd-sheet>
		<Heading>@Heading</Heading>
		<ChildContent>
			<NerdRows Rows="Rows" Pending="Pending" />
		</ChildContent>
	</DModal>
}

@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; }
	/// <summary>A tap opens the rows in a sheet where the screen has no hover.</summary>
	[Parameter] public bool TapOpens { get; set; } = true;

	bool opened;
	bool isSheetOpen;

	async Task Tap()
	{
		if (CascadingState.Status.CanHover())
			return;
		isSheetOpen = true;
		await Open();
	}

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

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

	RenderFragment Body => @<NerdRows Heading="@Heading" Rows="Rows" Pending="Pending" />;
}