@inherits DInputBase<int>

@* daisyUI Rating: https://daisyui.com/components/rating/ . A radio per item, sharing a per-instance name; Value is the
   number of the checked item, 0 for none. With Half every item is two half radios and Value counts halves (3 = 1.5
   stars). Static renders the read-only <div> version, marking the current item with aria-current. *@
<div @attributes="InputAttributes" class="@CssClassFull">
	@if (Static)
	{
		for (var i = 1; i <= Items; i++)
		{
			<div class="@ItemCss(i)" aria-label="@ItemText(i)" aria-current="@(i == CurrentValue ? "true" : null)"></div>
		}
	}
	else
	{
		if (Clearable)
		{
			<input type="radio" name="@GroupName" class="rating-hidden" aria-label="@ClearText" checked="@(CurrentValue == 0)"
				   disabled="@Disabled" @onchange="() => CurrentValue = 0" />
		}
		for (var i = 1; i <= Items; i++)
		{
			var item = i;
			<input type="radio" name="@GroupName" class="@ItemCss(item)" aria-label="@ItemText(item)" checked="@(item == CurrentValue)"
				   disabled="@Disabled" @onchange="() => CurrentValue = item" aria-invalid="@(IsInvalid ? "true" : null)" />
		}
	}
</div>

@code {
	[Parameter] public int Count { get; set; } = 5;
	[Parameter] public DRatingMask Mask { get; set; }
	[Parameter] public bool Half { get; set; }
	[Parameter] public DSize Size { get; set; }
	/// <summary>Adds the hidden first radio (rating-hidden) that clears the rating to 0.</summary>
	[Parameter] public bool Clearable { get; set; }
	/// <summary>Read-only rating: <div> items instead of radios.</summary>
	[Parameter] public bool Static { get; set; }
	[Parameter] public bool Disabled { get; set; }
	/// <summary>Classes for every item, e.g. a color: bg-orange-400.</summary>
	[Parameter] public string ItemClass { get; set; }
	/// <summary>The unit in each item's aria-label ("2 star").</summary>
	[Parameter] public string UnitText { get; set; } = "star";
	[Parameter] public string ClearText { get; set; } = "clear";

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

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

	int Items => Half ? Count * 2 : Count;

	string CssClassFull => Cx("rating", Half ? "rating-half" : null, SizeClass, CssClass);

	string ItemCss(int item) => Cx("mask", MaskClass, Half ? (item % 2 == 1 ? "mask-half-1" : "mask-half-2") : null, ItemClass);

	string ItemText(int item) =>
		$"{(Half ? item / 2.0 : item).ToString(System.Globalization.CultureInfo.InvariantCulture)} {UnitText}";

	string MaskClass => Mask switch
	{
		DRatingMask.Star2 => "mask-star-2",
		DRatingMask.Heart => "mask-heart",
		DRatingMask.Squircle => "mask-squircle",
		DRatingMask.Hexagon => "mask-hexagon",
		DRatingMask.Hexagon2 => "mask-hexagon-2",
		DRatingMask.Decagon => "mask-decagon",
		DRatingMask.Pentagon => "mask-pentagon",
		DRatingMask.Diamond => "mask-diamond",
		DRatingMask.Circle => "mask-circle",
		DRatingMask.Triangle => "mask-triangle",
		DRatingMask.Triangle2 => "mask-triangle-2",
		DRatingMask.Triangle3 => "mask-triangle-3",
		DRatingMask.Triangle4 => "mask-triangle-4",
		_ => "mask-star"
	};

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