// Two date display views used across the app:
//  - Data view: `08-08-26` (dashed DD-MM-YY) — compact, tabular-friendly.
//  - Human view: weekday in a badge (`Thursday`) with month/year added per requirement.

// Format a YYYY-MM-DD (or ISO) string as a compact dashed data-view date.
export function formatDDMMYY(dateStr: string | undefined): string {
	if (!dateStr) return '';
	const d = new Date(dateStr.slice(0, 10) + 'T00:00:00');
	if (Number.isNaN(d.getTime())) return '';
	const day = String(d.getDate()).padStart(2, '0');
	const mon = String(d.getMonth() + 1).padStart(2, '0');
	const yr = String(d.getFullYear()).slice(2);
	return `${day}-${mon}-${yr}`;
}

// Human view — the weekday name ("Thursday"). Render this inside a badge.
export function formatWeekday(dateStr: string | undefined): string {
	if (!dateStr) return '';
	const d = new Date(dateStr.slice(0, 10) + 'T00:00:00');
	if (Number.isNaN(d.getTime())) return '';
	return d.toLocaleDateString('en-GB', { weekday: 'long' });
}

// Human view — weekday + short date ("Thursday 7 Aug", adds year when not the
// current one, e.g. "Thursday 7 Aug 26").
export function formatHumanDate(dateStr: string | undefined): string {
	if (!dateStr) return '';
	const d = new Date(dateStr.slice(0, 10) + 'T00:00:00');
	if (Number.isNaN(d.getTime())) return '';
	const weekday = d.toLocaleDateString('en-GB', { weekday: 'long' });
	const mon = d.toLocaleDateString('en-GB', { month: 'short' });
	const sameYear = d.getFullYear() === new Date().getFullYear();
	return `${weekday} ${d.getDate()} ${mon}${sameYear ? '' : ' ' + String(d.getFullYear()).slice(2)}`;
}