import { API_URL } from "@/config/constants";

const delay = (ms: number) => new Promise((resolve) => setTimeout(resolve, ms));

export async function fetchPublicFacilities<T>(
  view: string,
  _revalidateSeconds: number,
  {
    allowEmpty = false,
    attempts = 3,
  }: {
    allowEmpty?: boolean;
    attempts?: number;
  } = {},
): Promise<T[]> {
  let lastError: Error | null = null;

  for (let attempt = 1; attempt <= attempts; attempt += 1) {
    try {
      const res = await fetch(`${API_URL}/facilities?view=${view}`, {
        cache: "no-store",
      });

      if (!res.ok) {
        throw new Error(`API returnerte status ${res.status}`);
      }

      const data = await res.json();
      if (!Array.isArray(data)) {
        throw new Error("API returnerte ikke en liste");
      }

      if (!allowEmpty && data.length === 0) {
        throw new Error("API returnerte tom liste");
      }

      return data as T[];
    } catch (error) {
      lastError = error instanceof Error ? error : new Error("Ukjent feil ved henting av anlegg");
      if (attempt < attempts) {
        await delay(attempt * 250);
      }
    }
  }

  throw lastError ?? new Error("Kunne ikke hente anlegg");
}