/********************************************************************************
 *    Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH    *
 *                                                                              *
 *              This software is distributed under the terms of the             * 
 *         GNU Lesser General Public Licence version 3 (LGPL) version 3,        *  
 *                  copied verbatim in the file "LICENSE"                       *
 ********************************************************************************/
/**
 * runExample2Sampler.cxx
 *
 * @since 2013-04-23
 * @author D. Klein, A. Rybalchenko
 */

#include <iostream>
#include <mutex>
#include <condition_variable>
#include <map>

#include "boost/program_options.hpp"
#include <boost/asio.hpp> // for DDS

#include "FairMQLogger.h"
#include "FairMQParser.h"
#include "FairMQProgOptions.h"
#include "FairMQExample3Sampler.h"
#include "FairMQTools.h"

#ifdef NANOMSG
#include "FairMQTransportFactoryNN.h"
#else
#include "FairMQTransportFactoryZMQ.h"
#endif

#include "KeyValue.h" // DDS

using namespace boost::program_options;

int main(int argc, char** argv)
{
    FairMQExample3Sampler sampler;
    sampler.CatchSignals();

    FairMQProgOptions config;

    try
    {
        std::string text;

        options_description samplerOptions("Sampler options");
        samplerOptions.add_options()
            ("text", value<std::string>(&text)->default_value("Hello"), "Text to send out");

        config.AddToCmdLineOptions(samplerOptions);

        if (config.ParseAll(argc, argv))
        {
            return 0;
        }

        std::string filename = config.GetValue<std::string>("config-json-file");
        std::string id = config.GetValue<std::string>("id");

        config.UserParser<FairMQParser::JSON>(filename, id);

        sampler.fChannels = config.GetFairMQMap();

        LOG(INFO) << "PID: " << getpid();

#ifdef NANOMSG
        FairMQTransportFactory* transportFactory = new FairMQTransportFactoryNN();
#else
        FairMQTransportFactory* transportFactory = new FairMQTransportFactoryZMQ();
#endif

        sampler.SetTransport(transportFactory);

        sampler.SetProperty(FairMQExample3Sampler::Id, id);
        sampler.SetProperty(FairMQExample3Sampler::Text, text);

        // Get the IP of the current host and store it for binding.
        map<string,string> IPs;
        FairMQ::tools::getHostIPs(IPs);
        stringstream ss;
        // Check if ib0 (infiniband) interface is available, otherwise try eth0 or wlan0.
        if (IPs.count("ib0")) {
          ss << "tcp://" << IPs["ib0"] << ":1";
        } else if (IPs.count("eth0")) {
          ss << "tcp://" << IPs["eth0"] << ":1";
        } else if (IPs.count("wlan0")) {
          ss << "tcp://" << IPs["wlan0"] << ":1";
        } else {
            LOG(INFO) << ss.str();
            LOG(ERROR) << "Could not find ib0, eth0 or wlan0";
            exit(EXIT_FAILURE);
        }
        string initialOutputAddress = ss.str();

        // Configure the found host IP for the channel.
        // TCP port will be chosen randomly during the initialization (binding).
        sampler.fChannels.at("data-out").at(0).UpdateAddress(initialOutputAddress);

        sampler.ChangeState("INIT_DEVICE");
        sampler.WaitForInitialValidation();

        // Advertise the bound addresses via DDS property
        LOG(INFO) << "Giving sampler output address to DDS.";
        dds::key_value::CKeyValue ddsKeyValue;
        ddsKeyValue.putValue("SamplerOutputAddress", sampler.fChannels.at("data-out").at(0).GetAddress());

        sampler.WaitForEndOfState("INIT_DEVICE");

        sampler.ChangeState("INIT_TASK");
        sampler.WaitForEndOfState("INIT_TASK");

        sampler.ChangeState("RUN");
        sampler.WaitForEndOfState("RUN");

        sampler.ChangeState("RESET_TASK");
        sampler.WaitForEndOfState("RESET_TASK");

        sampler.ChangeState("RESET_DEVICE");
        sampler.WaitForEndOfState("RESET_DEVICE");

        sampler.ChangeState("END");
    }
    catch (std::exception& e)
    {
        LOG(ERROR) << e.what();
        LOG(INFO) << "Command line options are the following: ";
        config.PrintHelp();
        return 1;
    }

    return 0;
}