import {
    OPCUAServer,
    Variant,
    DataType,
    StatusCodes,
    standardUnits
  } from "node-opcua";
import { nodesets, constructNodesetFilename } from "node-opcua-nodesets";
import { generateAddressSpace } from "node-opcua-address-space/nodeJS.js";
import { AddressSpace, RootFolder, UAAnalogItem, UAObject, UAObjectType } from "node-opcua-address-space";

class Main {
    server: OPCUAServer;
    constructor() {
        this.init();
        this.start()
    }

    async init() {
        this.server = new OPCUAServer({
            port: 4334, // the port of the listening socket of the server
            resourcePath: "/UA/nfrontend", // this path will be added to the endpoint resource name
            buildInfo: {
                productName: "NFrontend",
                buildNumber: "1337",
                buildDate: new Date(2021, 3, 16)
            },
            nodeset_filename: [
                nodesets.standard,
                "nodeset/Opc.Ua.MachineTool.Nodeset2.xml",
                "nodeset/Opc.Ua.Machinery.NodeSet2.xml",
                "nodeset/Opc.Ua.Di.NodeSet2.xml",
                "nodeset/Opc.Ua.Ia.NodeSet2.xml",
                "nodeset/emco_umati.xml",
            ]
        });
        await this.server.initialize();
    }

    async start() {
        console.log("initialized");
        this.server.start(() => {
            console.log("Server is now listening ... ( press CTRL+C to s top)");
            console.log("port ", this.server.endpoints[0].port);
            const endpointUrl = this.server.endpoints[0].endpointDescriptions()[0].endpointUrl;
            console.log(" the primary server endpoint url is ", endpointUrl);
        });
    }
  }
  let main = new Main();