/**
 * Number formatting helpers.
 * Default locale is es-ES (thousands "·" comma decimals). Change locale per project as needed.
 * Negative sign uses Unicode minus U+2212, not hyphen.
 * Positive deltas prefix "+".
 */

export function formatNumber(value: number, decimals = 0, locale = "es-ES"): string {
  return value.toLocaleString(locale, {
    minimumFractionDigits: decimals,
    maximumFractionDigits: decimals,
  });
}

export function formatDelta(value: number, decimals = 0, withPercent = true, locale = "es-ES"): string {
  const abs = Math.abs(value);
  const formatted = formatNumber(abs, decimals, locale);
  const sign = value < 0 ? "−" : value > 0 ? "+" : "";
  return `${sign}${formatted}${withPercent ? "%" : ""}`;
}