@inherits DInputBase<bool>

@* daisyUI Toggle: https://daisyui.com/components/toggle/ . With CheckedIcon/UncheckedIcon the toggle class moves to a
   wrapper around the checkbox and the two icons (each must be a single element: daisyUI shows the wrapper's 2nd child
   while unchecked and its 3rd while checked). daisyUI colors such a wrapper only through aria-checked, which a label
   may not carry, so its color is a has-checked: variable instead. With LabelText all of it sits in a label.label. *@
@if (!HasIcons && LabelText is null)
{
	@Checkbox(Cx("toggle", IsInvalid ? "toggle-error" : ColorClass, SizeClass, CssClass))
}
else if (!HasIcons)
{
	<label class="label">
		@Checkbox(Cx("toggle", IsInvalid ? "toggle-error" : ColorClass, SizeClass, CssClass))
		@LabelText
	</label>
}
else if (LabelText is null)
{
	<label class="@WrapperClass">@IconParts</label>
}
else
{
	<label class="label">
		<span class="@WrapperClass">@IconParts</span>
		@LabelText
	</label>
}

@code {
	[Parameter] public DColor Color { get; set; }
	[Parameter] public DSize Size { get; set; }
	[Parameter] public string LabelText { get; set; }
	[Parameter] public RenderFragment CheckedIcon { get; set; }
	[Parameter] public RenderFragment UncheckedIcon { get; set; }

	bool HasIcons => CheckedIcon is not null || UncheckedIcon is not null;

	string WrapperClass => Cx("toggle", IsInvalid ? "has-checked:[--input-color:var(--color-error)]" : WrapperColorClass, SizeClass, CssClass);

	RenderFragment Checkbox(string cssClass) =>
		@<input @attributes="InputAttributes" type="checkbox" class="@cssClass" name="@NameAttributeValue" checked="@CurrentValue"
				@onchange="OnChange" aria-invalid="@(IsInvalid ? "true" : null)" />;

	RenderFragment IconParts => @<text>
		@Checkbox(null)
		@if (UncheckedIcon is null)
		{
			<span></span>
		}
		else
		{
			@UncheckedIcon
		}
		@if (CheckedIcon is null)
		{
			<span></span>
		}
		else
		{
			@CheckedIcon
		}
	</text>;

	string ColorClass => Color switch
	{
		DColor.Neutral => "toggle-neutral",
		DColor.Primary => "toggle-primary",
		DColor.Secondary => "toggle-secondary",
		DColor.Accent => "toggle-accent",
		DColor.Info => "toggle-info",
		DColor.Success => "toggle-success",
		DColor.Warning => "toggle-warning",
		DColor.Error => "toggle-error",
		_ => null
	};

	string WrapperColorClass => Color switch
	{
		DColor.Neutral => "has-checked:[--input-color:var(--color-neutral)]",
		DColor.Primary => "has-checked:[--input-color:var(--color-primary)]",
		DColor.Secondary => "has-checked:[--input-color:var(--color-secondary)]",
		DColor.Accent => "has-checked:[--input-color:var(--color-accent)]",
		DColor.Info => "has-checked:[--input-color:var(--color-info)]",
		DColor.Success => "has-checked:[--input-color:var(--color-success)]",
		DColor.Warning => "has-checked:[--input-color:var(--color-warning)]",
		DColor.Error => "has-checked:[--input-color:var(--color-error)]",
		_ => null
	};

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

	void OnChange(ChangeEventArgs e) => CurrentValue = e.Value is true;
}