<script lang="ts">
import { formatDocumentDate, type DatePrecision } from '$lib/shared/utils/documentDate';
import { getLocale } from '$lib/paraglide/runtime.js';

type Props = {
	iso?: string | null;
	precision?: DatePrecision | null;
	end?: string | null;
	/** Verbatim import cell — used only to derive the SEASON word, never displayed. */
	raw?: string | null;
};

let { iso = null, precision = null, end = null, raw = null }: Props = $props();

const effectivePrecision = $derived<DatePrecision>(precision ?? (iso ? 'DAY' : 'UNKNOWN'));
const label = $derived(formatDocumentDate(iso, effectivePrecision, end, raw, getLocale()));
const isUnknown = $derived(effectivePrecision === 'UNKNOWN' || !iso);
</script>

<span class="inline-flex flex-col">
	{#if isUnknown}
		<!--
			Neutral metadata chip (#668): an undated letter is an absence, NOT an error,
			so the chip is neutral (text-ink-3 on bg-surface, ≥4.5:1 in both themes) —
			never red/amber. Matches the archive-metadata chip pattern in the row. The
			non-color cue (WCAG 1.4.1) is the calendar-with-question glyph; the visible
			"Datum unbekannt" text is the redundant textual cue and IS the accessibility,
			so it is announced inline (never aria-hidden) while the icon is decorative.
		-->
		<span
			data-testid="undated-badge"
			class="inline-flex items-center gap-1 rounded border border-line px-1.5 py-0.5 font-sans text-xs tracking-widest text-ink-3 uppercase"
		>
			<svg
				class="h-3 w-3 shrink-0 text-ink-3"
				viewBox="0 0 24 24"
				fill="none"
				stroke="currentColor"
				stroke-width="2"
				stroke-linecap="round"
				stroke-linejoin="round"
				aria-hidden="true"
			>
				<rect x="3" y="4" width="18" height="18" rx="2" />
				<path d="M3 10h18" />
				<path d="M9 16a1.5 1.5 0 0 1 3 0c0 1-1.5 1.2-1.5 2.2" />
				<path d="M10.5 21h.01" />
			</svg>
			{label}
		</span>
	{:else}
		<span>{label}</span>
	{/if}
</span>
