@typeparam TValue
@inherits DInputBase<TValue>
@attribute [CascadingTypeParameter(nameof(TValue))]

@* daisyUI Radio: https://daisyui.com/components/radio/ . The group holds the bound value and cascades itself (not
   fixed, so every DRadio re-renders with it); its radios share one name, the name attribute or a per-instance id.
   It adds a div role="radiogroup" only when given attributes (a class, an aria-label). *@
<CascadingValue Value="this">
	@if (AdditionalAttributes is null || AdditionalAttributes.Count == 0)
	{
		@ChildContent
	}
	else
	{
		<div @attributes="InputAttributes" role="radiogroup" class="@CssClass">
			@ChildContent
		</div>
	}
</CascadingValue>

@code {
	[Parameter] public RenderFragment ChildContent { get; set; }

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

	internal string GroupName => string.IsNullOrEmpty(NameAttributeValue) ? uid : NameAttributeValue;

	internal bool GroupInvalid => IsInvalid;

	internal bool IsSelected(TValue value) => EqualityComparer<TValue>.Default.Equals(CurrentValue, value);

	internal void Select(TValue value) => CurrentValue = value;
}