/** pt-BR display formatting helpers — currency/document masks only, no business logic. */

const currencyFormatter = new Intl.NumberFormat("pt-BR", { style: "currency", currency: "BRL" });

/**
 * Formats a money value for display. Accepts the API's `string | null`
 * NUMERIC representation (never coerce it to `number` for anything other
 * than display) or a plain `number` from a controlled form input.
 */
export function formatCurrencyBRL(value: string | number | null | undefined): string {
  if (value === null || value === undefined || value === "") return currencyFormatter.format(0);
  const numeric = typeof value === "number" ? value : Number(value);
  if (Number.isNaN(numeric)) return currencyFormatter.format(0);
  return currencyFormatter.format(numeric);
}

export function formatDateBR(value: string | Date | null | undefined): string {
  if (!value) return "—";
  const date = typeof value === "string" ? new Date(value) : value;
  if (Number.isNaN(date.getTime())) return "—";
  return new Intl.DateTimeFormat("pt-BR").format(date);
}

/** Same as `formatDateBR` but includes the time — for timestamps where the hour matters (e.g. SLA due dates). */
export function formatDateTimeBR(value: string | Date | null | undefined): string {
  if (!value) return "—";
  const date = typeof value === "string" ? new Date(value) : value;
  if (Number.isNaN(date.getTime())) return "—";
  return new Intl.DateTimeFormat("pt-BR", { dateStyle: "short", timeStyle: "short" }).format(date);
}

/** CNPJ (14 digits) or CPF (11 digits) mask — falls back to the raw value for anything else. */
export function formatDocument(value: string | null | undefined): string {
  if (!value) return "—";
  const digits = value.replace(/\D/g, "");
  if (digits.length === 14) {
    return digits.replace(/^(\d{2})(\d{3})(\d{3})(\d{4})(\d{2})$/, "$1.$2.$3/$4-$5");
  }
  if (digits.length === 11) {
    return digits.replace(/^(\d{3})(\d{3})(\d{3})(\d{2})$/, "$1.$2.$3-$4");
  }
  return value;
}