import type { TranslationKey } from "@/i18n";

type Translate = (key: TranslationKey, values?: Record<string, string | number>) => string;

const PROVIDER_OVERLOADED_RE =
  /^(.*?): provider is temporarily overloaded\. Please retry in a moment or switch models\.$/i;

export function formatUserFacingError(
  message: string | null | undefined,
  t: Translate,
  modelDisplayName?: string | null
): string | null {
  if (!message) return null;

  const overloadedMatch = message.match(PROVIDER_OVERLOADED_RE);
  if (overloadedMatch) {
    return t("error.providerOverloaded", {
      model: modelDisplayName?.trim() || (overloadedMatch[1] ?? "Model").trim(),
    });
  }

  return message;
}