var ads = require('ads');

var options = {
    //The IP or hostname of the target machine
    host: "10.0.0.2", 
    //The NetId of the target machine
    amsNetIdTarget: "5.1.204.160.1.1",
    //The NetId of the source machine.
    //You can choose anything in the form of x.x.x.x.x.x,
    //but on the target machine this must be added as a route.
    amsNetIdSource: "192.168.137.50.1.1",

    //OPTIONAL: (These are set by default) 
    //The tcp destination port
    //port: 48898
    //The ams source port
    //amsPortSource: 32905
    //The ams target port
    //amsPortTarget: 801
};

client = ads.connect(options, function() {
    this.readDeviceInfo(function(result) {
        console.log(result);
        this.end();
    });
});

client.on('error', function(error) {
    console.log(error);
});

var myHandle = {
    //Handle name in twincat
    symname: '.TESTINT',  
    //An ads type object or an array of type objects.
    //You can also specify a number or an array of numbers,
    //the result will then be a buffer object.
    //If not defined, the default will be BOOL.
    bytelength: ads.INT,  
    //The propery name where the value should be written.
    //This can be an array with the same length as the array length of byteLength. 
    //If not defined, the default will be 'value'.     
    propname: 'value'      
};

client = ads.connect(options, function() {
    this.read(myHandle, function(handle) {
        //result is the myHandle object with the new properties filled in
        console.log(handle.value);
        //All handles will be released automaticly here
        this.end();
    });
});

client = ads.connect(options, function() {
    myHandle.value = 5;
    this.write(myHandle, function() {
        this.read(myHandle, function(handle) {
            console.log(handle.value);
            this.end();
        });
    });
});

var myHandle = {
    symname: '.CounterTest',       
    bytelength: ads.WORD,  

    //OPTIONAL: (These are set by default)       
    //transmissionMode: ads.NOTIFY.ONCHANGE, (other option is ads.NOTIFY.CYLCIC)
    //maxDelay: 0,  -> Latest time (in ms) after which the event has finished
    //cycleTime: 10 -> Time (in ms) after which the PLC server checks whether the variable has changed
};

client = ads.connect(options, function() {
    this.notify(myHandle);
});

client.on('notification', function(handle){
    console.log(handle.value);
});

process.on('exit', function () {
    console.log("exit");
});

process.on('SIGINT', function() {
    client.end(function() {
        process.exit();
    });
});