/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2017 Intel Corporation.
 *
 * This program and the accompanying materials are made available under the
 * terms of the The MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 */

var sensorObj = require('jsupm_rn2903');

var defaultDev = "/dev/ttyUSB0";

// if an argument was specified, use it as the device instead
if (process.argv.length > 2)
{
    defaultDev = process.argv[2];
}

console.log("Using device:", defaultDev);

// Instantiate a RN2903 sensor on defaultDev at 57600 baud.
var sensor = new sensorObj.RN2903(defaultDev,
                                  sensorObj.RN2903_DEFAULT_BAUDRATE);

// To use an internal UART understood by MRAA, use the following
// to inititialize rather than the above, which by default uses a
// tty path.
//
// var sensor = new sensorObj.RN2903(0,
//                                   sensorObj.RN2903_DEFAULT_BAUDRATE);

// enable debugging
// sensor.setDebug(true);

// get version
if (sensor.command("sys get ver"))
{
    console.log("Failed to retrieve device version string");
    process.exit(1);
}
console.log("Firmware version: " + sensor.getResponse());

console.log("Hardware EUI: " + sensor.getHardwareEUI());

// we can support two types of join, OTAA and ABP. Each requires
// that certain parameters be set first.  We will only attempt ABP
// joining with this example since it's the only one that can
// succeed without actual configuration.  In both cases, if you
// are actually attempting to join a real LoRaWAN network, you
// must change the parameters below to match the network you are
// attempting to join.

// For OTAA, you need to supply valid Device EUI, Application EUI,
// and Application key:
//
// sensor.setDeviceEUI("0011223344556677");
// sensor.setApplicationEUI("0011223344556677");
// sensor.setApplicationKey("01234567012345670123456701234567");
//
// RN2903_JOIN_STATUS_T rv = sensor.join(RN2903_JOIN_TYPE_OTAA);
// A successful join will return RN2903_JOIN_STATUS_ACCEPTED (0).
// cout << "JOIN: got rv " << int(rv) << endl;

// Try an ABP join.  Note, these parameters are made up.  For a
// real network, you will want to use the correct values
// obviously.  For an ABP join, you need to supply the Device
// Address, Network Session Key, and the Application Session Key.

sensor.setDeviceAddr("00112233");
sensor.setNetworkSessionKey("00112233001122330011223300112233");
sensor.setApplicationSessionKey("00112233001122330011223300112233");

var rv = sensor.join(sensorObj.RN2903_JOIN_TYPE_ABP);
if (rv == sensorObj.RN2903_JOIN_STATUS_ACCEPTED)
{
    console.log("Join successful.");

    // All transmit payloads must be hex encoded strings, so
    // pretend we have a temperature sensor that gave us a value
    // of 25.6 C, and we want to transmit it.
    var faketemp = "25.6";
    console.log("Transmitting a packet...");

    var trv = sensor.macTx(sensorObj.RN2903_MAC_MSG_TYPE_UNCONFIRMED,
                           1, // port number
                           sensor.toHex(faketemp));

    if (trv == sensorObj.RN2903_MAC_TX_STATUS_TX_OK)
        console.log("Transmit successful.");
    else
    {
        // check to see if we got a downlink packet
        if (trv == sensorObj.RN2903_MAC_TX_STATUS_RX_RECEIVED)
        {
            console.log("Transmit successful, downlink packet received: "
                         + sensor.getResponse());
        }
        else
        {
            console.log("Transmit failed with code " + trv);
        }
    }
}
else
{
    console.log("Join failed with code " + rv);
}


console.log("Exiting");

sensor = null;
sensorObj.cleanUp();
sensorObj = null;
process.exit(0);