@inherits DInputBase<DateOnly?>
@using System.Globalization

@* daisyUI Calendar (Cally): https://daisyui.com/components/calendar/ . Wraps the <calendar-date> web component from
   wwwroot/vendor/cally.js; value, min and max are yyyy-MM-dd, and Blazor reads the element's value on its change
   event. Other Cally attributes (locale, first-day-of-week, months) pass through. *@
<calendar-date @attributes="InputAttributes" class="@Cx("cally", CssClass)" value="@CurrentValueAsString" min="@Format(Min)"
			   max="@Format(Max)" @onchange="OnChange" aria-invalid="@(IsInvalid ? "true" : null)">
	<svg aria-label="@PreviousText" class="fill-current size-4" slot="previous" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M15.75 19.5 8.25 12l7.5-7.5"></path></svg>
	<svg aria-label="@NextText" class="fill-current size-4" slot="next" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="m8.25 4.5 7.5 7.5-7.5 7.5"></path></svg>
	<calendar-month></calendar-month>
</calendar-date>

@code {
	[Parameter] public DateOnly? Min { get; set; }
	[Parameter] public DateOnly? Max { get; set; }
	[Parameter] public string PreviousText { get; set; } = "Previous";
	[Parameter] public string NextText { get; set; } = "Next";

	static string Format(DateOnly? date) => date?.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture);

	protected override string FormatValueAsString(DateOnly? value) => Format(value);

	protected override bool TryParseValueFromString(string value, out DateOnly? result, out string validationErrorMessage)
	{
		validationErrorMessage = null;
		result = null;
		if (string.IsNullOrEmpty(value))
			return true;
		if (DateOnly.TryParseExact(value, "yyyy-MM-dd", CultureInfo.InvariantCulture, DateTimeStyles.None, out var date))
		{
			result = date;
			return true;
		}
		validationErrorMessage = $"The {DisplayName ?? FieldIdentifier.FieldName} field is not a valid date.";
		return false;
	}

	void OnChange(ChangeEventArgs e) => CurrentValueAsString = e.Value?.ToString();
}