const dateFmt = new Intl.DateTimeFormat("fa-IR-u-ca-persian", {
  year: "numeric",
  month: "2-digit",
  day: "2-digit",
  hour: "2-digit",
  minute: "2-digit",
});

/** ISO date → Jalali date and time, e.g. «۱۴۰۴/۰۷/۲۹، ۱۶:۳۰» */
export const jalali = (iso: string | null | undefined) => (iso ? dateFmt.format(new Date(iso)) : "—");

export const fileSize = (bytes: number) =>
  bytes < 1024 * 1024
    ? `${(bytes / 1024).toLocaleString("fa-IR", { maximumFractionDigits: 0 })} کیلوبایت`
    : `${(bytes / 1024 / 1024).toLocaleString("fa-IR", { maximumFractionDigits: 1 })} مگابایت`;

export const faNumber = (n: number) => n.toLocaleString("fa-IR");

/** Website base URL for "view on site" links */
export const SITE_URL = (import.meta.env.VITE_SITE_URL as string | undefined) ?? "http://localhost:3000";

const ACTION_LABELS: Record<string, string> = {
  create: "ایجاد",
  update: "ویرایش",
  delete: "حذف",
  upload: "آپلود",
  login: "ورود",
  publish: "انتشار",
  unpublish: "عدم انتشار",
  duplicate: "کپی",
  reorder: "مرتب‌سازی",
  "change-password": "تغییر رمز",
};
const ENTITY_LABELS: Record<string, string> = {
  product: "محصول",
  category: "دسته",
  section: "بخش سایت",
  media: "رسانه",
  user: "کاربر",
  message: "پیام",
};

export const activityLabel = (action: string, entity: string) =>
  `${ACTION_LABELS[action] ?? action} ${ENTITY_LABELS[entity] ?? entity}`;