export function formatDisplayDate(value: string | null | undefined) {
  if (!value) return "-";

  const match = /^(\d{4})-(\d{2})-(\d{2})/.exec(value);
  if (match) {
    const [, year, month, day] = match;
    return `${Number(year)}年${Number(month)}月${Number(day)}日`;
  }

  const timestamp = new Date(value).getTime();
  if (Number.isNaN(timestamp)) return "-";
  return new Intl.DateTimeFormat("zh-CN", {
    year: "numeric",
    month: "long",
    day: "numeric",
  }).format(timestamp);
}

export function formatDisplayDateTime(value: string | null | undefined) {
  if (!value) return "-";

  const timestamp = new Date(value).getTime();
  if (Number.isNaN(timestamp)) return formatDisplayDate(value);

  return new Intl.DateTimeFormat("zh-CN", {
    year: "numeric",
    month: "long",
    day: "numeric",
    hour: "2-digit",
    minute: "2-digit",
  }).format(timestamp);
}

export function formatCompactIdentifier(
  value: string | number | null | undefined,
  options: { head?: number; tail?: number; minLength?: number } = {},
) {
  const text = String(value ?? "").trim();
  if (!text) return "-";

  const head = options.head ?? 10;
  const tail = options.tail ?? 4;
  const minLength = options.minLength ?? 18;

  if (text.length <= minLength || text.length <= head + tail + 1) {
    return text;
  }

  return `${text.slice(0, head)}…${text.slice(-tail)}`;
}

export function isCompactedIdentifier(value: string | number | null | undefined, displayValue: string) {
  const text = String(value ?? "").trim();
  return Boolean(text) && text !== displayValue;
}

export function formatTextWithCompactLongNumbers(value: string | number | null | undefined) {
  const text = String(value ?? "").trim();
  if (!text) return "-";

  return text.replace(/\b20[0-9]{12,}\b/g, (match) => {
    if (match.length <= 12) return match;
    return `${match.slice(0, 8)}…${match.slice(-4)}`;
  });
}