import { openDB } from "idb"; // utils/indexedDB.js

// Überprüfe, ob `window` verfügbar ist, um zu bestimmen, ob der Code im Browser läuft
const dbPromise =
  typeof window !== "undefined"
    ? openDB("my-pdf-store", 2, {
        upgrade(db) {
          if (!db.objectStoreNames.contains("pdfs")) {
            db.createObjectStore("pdfs");
          }
          if (!db.objectStoreNames.contains("pages")) {
            db.createObjectStore("pages");
          }
          if (!db.objectStoreNames.contains("cplVariables")) {
            db.createObjectStore("cplVariables");
          }
        },
      })
    : null;

// Store PDF
export async function storePDF(name, file) {
  if (!dbPromise) return;
  const db = await dbPromise;
  await db.put("pdfs", file, name);
}

export async function getPDF(name) {
  if (!dbPromise) return null;
  const db = await dbPromise;
  return await db.get("pdfs", name);
}

// Store page
export async function storePage(name, file) {
  if (!dbPromise) return;
  const db = await dbPromise;
  const transaction = db.transaction("pages", "readwrite");
  const store = transaction.objectStore("pages");
  await store.put(file, name);
  await transaction.done;
}

export async function getPage(name) {
  if (!dbPromise) return null;
  const db = await dbPromise;
  return await db.get("pages", name);
}

// Store and retrieve data for CPL variables

export async function storeCPLVariable(key, value) {
  if (!dbPromise) return;
  const db = await dbPromise;
  const transaction = db.transaction("cplVariables", "readwrite");
  const store = transaction.objectStore("cplVariables");
  await store.put(value, key);
  await transaction.done;
}

export async function getFromIndexedDB(key) {
  if (!dbPromise) return null;
  const db = await dbPromise;
  return await db.get("cplVariables", key);
}