/*
 * Author: Jon Trulson <jtrulson@ics.com>
 * Copyright (c) 2017 Intel Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include <unistd.h>
#include <iostream>
#include <sstream>
#include <string>
#include <signal.h>

#include "rn2903.hpp"
#include "upm_utilities.h"

using namespace std;

bool shouldRun = true;

void sig_handler(int signo)
{
  if (signo == SIGINT)
    shouldRun = false;
}


int main(int argc, char **argv)
{
  signal(SIGINT, sig_handler);
//! [Interesting]

    string defaultDev = "/dev/ttyUSB0";
    if (argc > 1)
        defaultDev = argv[1];

    cout << "Using device: " << defaultDev << endl;

    // Instantiate a RN2903 sensor on defaultDev at 57600 baud.
    upm::RN2903 sensor(defaultDev, 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.
    //
    // upm::RN2903 sensor = upm::RN2903(0, RN2903_DEFAULT_BAUDRATE);

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

    // get version
    if (sensor.command("sys get ver"))
    {
        cout << "Failed to retrieve device version string" << endl;
        return 1;
    }
    cout << "Firmware version: " << sensor.getResponse() << endl;

    cout << "Hardware EUI: " << sensor.getHardwareEUI() << endl;

    // For this example, we will just try transmitting a packet over
    // LoRa.  We reset the device to defaults, and we do not make any
    // adjustments to the radio configuration.  You will probably want
    // to do so for a real life application.

    // The first thing to do is to suspend the LoRaWAN stack on the device.
    sensor.macPause();

    // the default radio watchdog timer is set for 15 seconds, so we
    // will send a packet every 10 seconds.  In reality, local
    // restrictions limit the amount of time on the air, so in a real
    // implementation, you would not want to send packets that
    // frequently.

    int count = 0;
    while (shouldRun)
    {
        ostringstream output;
        output << "Ping " << count++;

        // All payloads must be hex encoded
        string payload = sensor.toHex(output.str());

        cout << "Transmitting a packet, data: '"
             << output.str()
             << "' -> hex: '"
             << payload
             << "'"
             << endl;

        RN2903_RESPONSE_T rv;
        rv = sensor.radioTx(payload);

        if (rv == RN2903_RESPONSE_OK)
            cout << "Transmit successful." << endl;
        else
            cout << "Transmit failed with code " << int(rv) << endl;

        cout << endl;
        upm_delay(10);
    }

    cout << "Exiting" << endl;

//! [Interesting]

    return 0;
}