(function (I) {
  const DB_NAME = 'DuimstokInspecties';
  const DB_VERSION = 3;
  let db = null;

  I.openDB = function () {
    return new Promise((resolve, reject) => {
      const req = indexedDB.open(DB_NAME, DB_VERSION);
      req.onupgradeneeded = (e) => {
        const d = e.target.result;
        if (!d.objectStoreNames.contains('inspections'))
          d.createObjectStore('inspections', { keyPath: 'orderNr' });
        if (!d.objectStoreNames.contains('orderStatuses'))
          d.createObjectStore('orderStatuses', { keyPath: 'orderKey' });
      };
      req.onsuccess = (e) => { db = e.target.result; resolve(db); };
      req.onerror = (e) => reject(e);
    });
  };

  async function ensureDb() {
    if (!db) await I.openDB();
    return db;
  }

  I.saveInspection = async function (formData) {
    const d = await ensureDb();
    return new Promise((resolve, reject) => {
      const tx = d.transaction('inspections', 'readwrite');
      tx.objectStore('inspections').put(JSON.parse(JSON.stringify(formData)));
      tx.oncomplete = () => resolve();
      tx.onerror = reject;
    });
  };

  I.loadInspection = async function (orderNr) {
    const d = await ensureDb();
    return new Promise((resolve, reject) => {
      const tx = d.transaction('inspections', 'readonly');
      const req = tx.objectStore('inspections').get(orderNr);
      req.onsuccess = () => resolve(req.result);
      req.onerror = reject;
    });
  };

  I.saveOrderStatus = async function (orderKey, status) {
    const d = await ensureDb();
    return new Promise((resolve, reject) => {
      const tx = d.transaction('orderStatuses', 'readwrite');
      tx.objectStore('orderStatuses').put({ orderKey, status, updatedAt: new Date().toISOString() });
      tx.oncomplete = resolve;
      tx.onerror = reject;
    });
  };

  I.loadAllOrderStatuses = async function () {
    const d = await ensureDb();
    return new Promise((resolve, reject) => {
      const tx = d.transaction('orderStatuses', 'readonly');
      const req = tx.objectStore('orderStatuses').getAll();
      req.onsuccess = () => {
        const map = {};
        (req.result || []).forEach(r => { map[r.orderKey] = r.status; });
        resolve(map);
      };
      req.onerror = reject;
    });
  };
})(window.App.Infrastructure);