/** 时间工具：统一 ISO 8601（UTC）字符串，跨端序列化口径一致 */

export function nowIso(): string {
  return new Date().toISOString();
}

export function toIsoString(value: Date | number | string): string {
  const date = value instanceof Date ? value : new Date(value);
  if (Number.isNaN(date.getTime())) {
    throw new TypeError(`无法解析时间：${String(value)}`);
  }
  return date.toISOString();
}

export function addSeconds(date: Date, seconds: number): Date {
  return new Date(date.getTime() + seconds * 1000);
}

const ISO_PATTERN = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(?:\.\d{1,3})?Z$/;

export function isIsoDateString(value: string): boolean {
  return ISO_PATTERN.test(value) && !Number.isNaN(Date.parse(value));
}