import { normalizeWarning } from "@/lib/weather-utils";
import type { RawWarning, WeatherWarning } from "@/types/imgw";

const IMGW_WARNINGS_METEO_URL = "https://danepubliczne.imgw.pl/api/data/warningsmeteo";
const USER_AGENT = "wtr./1.0 (weather notification worker)";

export async function fetchMeteoWarnings(signal?: AbortSignal): Promise<WeatherWarning[]> {
  const response = await fetch(IMGW_WARNINGS_METEO_URL, {
    headers: { accept: "application/json", "user-agent": USER_AGENT },
    next: { revalidate: 300 },
    signal,
  });
  if (!response.ok) {
    const details = await response.text().catch(() => "");
    throw new Error(`Unable to load IMGW meteorological warnings: ${response.status}${details ? ` ${details.slice(0, 240)}` : ""}`);
  }
  const rows = await response.json() as RawWarning[];
  return Array.isArray(rows) ? rows.map((warning, index) => normalizeWarning(warning, "meteo", index)) : [];
}