// /utils/loadWindowVariables.ts
import store from "../redux/store";
import { setSystemSettings } from "../redux/slices/systemSettingsSlice";
import {
  toggleOpcUaServer,
  setOpcUaEncryption,
  setOpcUaZustand,
  setOpcUaActiveClientCount,
  setOpcUaNodesetName,
  addOpcUaUser,
  removeOpcUaUser,
} from "../redux/slices/opcuaSettingsSlice";

// ✅ Interface für `window`-Objekt zur TypeScript-Sicherheit
interface CustomWindow extends Window {
  [key: string]: any;
}

// ✅ Interface für System-Einstellungen im Redux-Store
interface SystemSettings {
  deviceName: string;
  mac1: string;
  ip: string;
  subnet: string;
  gateway: string;
  cplInternalTimestamp: string;
  ntp1: string;
  ntp2: string;
  ntp3: string;
  ntpTimezone: string;
  ntpActive: boolean;
}

// ✅ Interface für OPC-UA Einstellungen im Redux-Store
interface OpcUaSettings {
  isEnabled: boolean;
  encryption: string;
  opcUaZustand: string;
  opcUaActiveClientCount: number;
  opcUaNodesetName: string;
  users: { id: number; username: string; password: string }[];
}

// ✅ Hauptfunktion zum Laden von `window`-Variablen
export async function loadWindowVariables(): Promise<Record<string, any>> {
  return new Promise((resolve, reject) => {
    const requiredVars: string[] = [
      "win_last20Messages",
      "win_deviceName",
      "win_mac1",
      "win_ip",
      "win_subnet",
      "win_gateway",
      "win_cplInternalTimestamp",
      "win_ntp1",
      "win_ntp2",
      "win_ntp3",
      "win_systemZeit",
      "win_ntpTimezone",
      "win_ntpActive",
      "win_de_state",
      "win_counter",
      "win_flutter",
      "win_kueOnline",
      "win_kueID",
      "win_kuePSTmMinus96V",
      "win_kueAlarm1",
      "win_kueAlarm2",
      "win_kueIso",
      "win_kueResidence",
      "win_kueCableBreak",
      "win_kueGroundFault",
      "win_kueLimit1",
      "win_kueLimit2Low",
      "win_kueDelay1",
      "win_kueLoopInterval",
      "win_kueVersion",
      "win_tdrAtten",
      "win_tdrPulse",
      "win_tdrSpeed",
      "win_tdrAmp",
      "win_tdrTrigger",
      "win_tdrLocation",
      "win_tdrActive",
      "win_kueOverflow",
      "win_tdrLast",
      "win_appVersion",
      "win_analogeEingaenge1",
      "win_analogeEingaenge2",
      "win_analogeEingaenge3",
      "win_analogeEingaenge4",
      "win_analogeEingaenge5",
      "win_analogeEingaenge6",
      "win_analogeEingaenge7",
      "win_analogeEingaenge8",
      "win_da_state",
      "win_da_bezeichnung",
      "win_opcUaZustand",
      "win_opcUaActiveClientCount",
      "win_opcUaNodesetName",
      "win_opcUaEncryption", // ✅ NEU: Verschlüsselung von OPC-UA
      "win_opcUaUsers", // ✅ NEU: OPC-UA Benutzerliste
    ];

    const scripts: string[] = [
      "da.js",
      "de.js",
      "ae.js",
      "kueData.js",
      "Start.js",
      "System.js",
      "opcua.js",
    ];

    const loadScript = (src: string): Promise<void> => {
      return new Promise((resolve, reject) => {
        const script = document.createElement("script");
        const environment = process.env.NEXT_PUBLIC_NODE_ENV || "production";
        script.src =
          environment === "production"
            ? `/CPL?/CPL/SERVICE/${src}`
            : `/CPLmockData/SERVICE/${src}`;
        script.async = true;
        script.onload = () => resolve();
        script.onerror = () => reject(new Error(`Script load error: ${src}`));
        document.head.appendChild(script);
      });
    };

    // ✅ Lade alle Skripte nacheinander
    scripts
      .reduce(
        (promise, script) => promise.then(() => loadScript(script)),
        Promise.resolve()
      )
      .then(() => {
        const win = window as unknown as CustomWindow;

        // ✅ Erstelle ein Objekt mit allen geladenen Variablen
        const variablesObj: Record<string, any> = requiredVars.reduce(
          (acc, variable) => {
            if (win[variable] !== undefined) {
              acc[variable.replace("win_", "")] = win[variable];
            }
            return acc;
          },
          {}
        );

        // ✅ Redux mit Systemvariablen aktualisieren
        loadAndStoreSystemSettings(win);
        loadAndStoreOpcUaSettings(win);

        resolve(variablesObj);
      })
      .catch((error) => {
        console.error("Fehler beim Laden eines Skripts:", error);
        reject(error);
      });
  });
}

// ✅ Funktion zum Speichern von System-Variablen in Redux
const loadAndStoreSystemSettings = (win: CustomWindow) => {
  const settings: SystemSettings = {
    deviceName: win.win_deviceName || "",
    mac1: win.win_mac1 || "",
    ip: win.win_ip || "",
    subnet: win.win_subnet || "",
    gateway: win.win_gateway || "",
    cplInternalTimestamp: win.win_cplInternalTimestamp || "",
    ntp1: win.win_ntp1 || "",
    ntp2: win.win_ntp2 || "",
    ntp3: win.win_ntp3 || "",
    ntpTimezone: win.win_ntpTimezone || "",
    ntpActive: win.win_ntpActive || false,
  };

  store.dispatch(setSystemSettings(settings));
};

// ✅ Funktion zum Speichern von OPC-UA Variablen in Redux
const loadAndStoreOpcUaSettings = (win: CustomWindow) => {
  // ✅ Aktuellen Redux-Status holen
  const currentState = store.getState().opcuaSettings;

  // ✅ Nur setzen, wenn sich der Zustand geändert hat
  if (currentState.opcUaZustand !== win.win_opcUaZustand) {
    store.dispatch(setOpcUaZustand(win.win_opcUaZustand || "Offline"));
  }

  // ✅ Nur setzen, wenn sich die Verschlüsselung geändert hat
  if (currentState.encryption !== win.win_opcUaEncryption) {
    store.dispatch(setOpcUaEncryption(win.win_opcUaEncryption || "None"));
  }

  // ✅ Nur setzen, wenn sich die Anzahl der aktiven Clients geändert hat
  if (currentState.opcUaActiveClientCount !== win.win_opcUaActiveClientCount) {
    store.dispatch(
      setOpcUaActiveClientCount(win.win_opcUaActiveClientCount || 0)
    );
  }

  // ✅ Nur setzen, wenn sich der Nodeset-Name geändert hat
  if (currentState.opcUaNodesetName !== win.win_opcUaNodesetName) {
    store.dispatch(
      setOpcUaNodesetName(win.win_opcUaNodesetName || "DefaultNodeset")
    );
  }

  // ✅ Benutzer synchronisieren (aber nicht überschreiben, wenn manuell hinzugefügt)
  if (Array.isArray(win.win_opcUaUsers) && win.win_opcUaUsers.length > 0) {
    const newUsers = win.win_opcUaUsers;
    const currentUsers = currentState.users;

    // ✅ Vorhandene Benutzer entfernen, die nicht mehr in `window` sind
    currentUsers.forEach((user) => {
      if (!newUsers.some((newUser) => newUser.username === user.username)) {
        store.dispatch(removeOpcUaUser(user.id));
      }
    });

    // ✅ Nur neue Benutzer hinzufügen, falls sie nicht existieren
    newUsers.forEach((user) => {
      if (
        !currentUsers.some(
          (existingUser) => existingUser.username === user.username
        )
      ) {
        store.dispatch(
          addOpcUaUser({ username: user.username, password: user.password })
        );
      }
    });
  }
};