/**
 * Globaler Formatter für Maße in cm — JS-Pendant zu classes/format.php.
 *
 * Verwendung in inline-JS-Templates (shop.php, task.php, scan/scripts/script.php):
 *     fmtCm(mm)              // "30,5 cm" / "30 cm" / "" je nach Locale + Wert
 *     fmtCm(mm, {unit:false}) // "30,5"   — wenn der Wert in ein Form-Feld geht
 *     fmtSize(x, y)           // "60 × 30,5 cm"
 *     fmtSize(x, y, z)        // "60 × 30,5 × 2 cm"
 *
 * Locale-Quelle: window.APP_LANG (in assets/head.php aus $_SESSION["lang"] gesetzt).
 * Override per opts.lang für Sonderfälle.
 *
 * Alle drei Achsen werden gleich behandelt — eine Regel.
 *
 * @see plan: C:\Users\jonas\.claude\plans\abstract-baking-thimble.md
 */
(function () {
	var COMMA_LANGS = { de: 1, it: 1, fr: 1, es: 1, pt: 1, nl: 1 };

	function fmtCm(mm, opts) {
		opts = opts || {};
		if (mm === null || mm === undefined || mm === '' || isNaN(mm)) return '';

		var decimals = opts.decimals != null ? opts.decimals : 1;
		var lang = opts.lang || window.APP_LANG || 'en';
		var sep = COMMA_LANGS[lang] ? ',' : '.';
		var withUnit = opts.unit !== false;

		var factor = Math.pow(10, decimals);
		var cm = Math.round((Number(mm) / 10) * factor) / factor;
		var s = cm.toFixed(decimals);
		if (decimals > 0) s = s.replace(/\.?0+$/, '');
		if (s === '-0') s = '0';
		s = s.replace('.', sep);

		return withUnit ? s + ' cm' : s;
	}

	function fmtSize(x, y, z, opts) {
		var withUnit = !opts || opts.unit !== false;
		var inner = Object.assign({}, opts || {}, { unit: false });
		var parts = [fmtCm(x, inner), fmtCm(y, inner)];
		if (z !== null && z !== undefined && z !== '' && !isNaN(z)) {
			parts.push(fmtCm(z, inner));
		}
		return parts.join(' × ') + (withUnit ? ' cm' : '');
	}

	window.fmtCm = fmtCm;
	window.fmtSize = fmtSize;
})();