// /services/fetchSystemVoltTempService.ts

export const fetchSystemVoltTempService = async () => {
  if (typeof window === "undefined") return null;

  const scriptSrc =
    process.env.NEXT_PUBLIC_NODE_ENV === "production"
      ? "/CPL?/CPL/SERVICE/voltTemp.js" // ⬅️ später anpassen, wenn CPL liefert
      : "/api/cpl/systemVoltTempAPIHandler";

  await new Promise<void>((resolve, reject) => {
    const script = document.createElement("script");
    script.src = scriptSrc;
    script.async = true;
    script.onload = () => resolve();
    script.onerror = () =>
      reject("❌ Fehler beim Laden von systemVoltTempMockData.js");
    document.body.appendChild(script);
  });

  const win = window as any;
  const data = win.win_systemVoltTempMockData;

  if (!data) {
    console.warn("⚠️ win_systemVoltTempMockData fehlt oder ungültig:", data);
    return null;
  }

  return data;
};