/*!
 * \file rtcm_printer.cc
 * \brief Implementation of a RTCM 3.2 printer for GNSS-SDR
 * This class provides a implementation of a subset of the RTCM Standard 10403.2
 * for Differential GNSS Services
 *
 * \author Carles Fernandez-Prades, 2014. cfernandez(at)cttc.es
 *
 * -------------------------------------------------------------------------
 *
 * Copyright (C) 2010-2015  (see AUTHORS file for a list of contributors)
 *
 * GNSS-SDR is a software defined Global Navigation
 *          Satellite Systems receiver
 *
 * This file is part of GNSS-SDR.
 *
 * GNSS-SDR is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * GNSS-SDR is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
 *
 * -------------------------------------------------------------------------
 */

#include "rtcm_printer.h"
#include <ctime>
#include <iostream>
#include <iomanip>
#include <fcntl.h>    // for O_RDWR
#include <termios.h>  // for tcgetattr
#include <gflags/gflags.h>
#include <glog/logging.h>

using google::LogMessage;


Rtcm_Printer::Rtcm_Printer(std::string filename, bool flag_rtcm_server, bool flag_rtcm_tty_port, unsigned short rtcm_tcp_port, unsigned short rtcm_station_id, std::string rtcm_dump_devname, bool time_tag_name)
{
    time_t rawtime;
    struct tm * timeinfo;
    time ( &rawtime );
    timeinfo = localtime ( &rawtime );

    if (time_tag_name)
        {
            std::stringstream strm0;
            const int year = timeinfo->tm_year - 100;
            strm0 << year;
            const int month = timeinfo->tm_mon + 1;
            if(month < 10)
                {
                    strm0 << "0";
                }
            strm0 << month;
            const int day = timeinfo->tm_mday;
            if(day < 10)
                {
                    strm0 << "0";
                }
            strm0 << day << "_";
            const int hour = timeinfo->tm_hour;
            if(hour < 10)
                {
                    strm0 << "0";
                }
            strm0 << hour;
            const int min = timeinfo->tm_min;
            if(min < 10)
                {
                    strm0 << "0";
                }
            strm0 << min;
            const int sec = timeinfo->tm_sec;
            if(sec < 10)
                {
                    strm0 << "0";
                }
            strm0 << sec;

            rtcm_filename = filename + "_" +  strm0.str() + ".rtcm";
        }
    else
        {
            rtcm_filename = filename + ".rtcm";
        }

    rtcm_file_descriptor.open(rtcm_filename.c_str(), std::ios::out);
    if (rtcm_file_descriptor.is_open())
        {
            DLOG(INFO) << "RTCM printer writing on " << rtcm_filename.c_str();
        }

    rtcm_devname = rtcm_dump_devname;
    if (flag_rtcm_tty_port == true)
        {
            rtcm_dev_descriptor = init_serial(rtcm_devname.c_str());
            if (rtcm_dev_descriptor != -1)
                {
                    DLOG(INFO) << "RTCM printer writing on " << rtcm_devname.c_str();
                }
        }
    else
        {
            rtcm_dev_descriptor = -1;
        }

    port = rtcm_tcp_port;
    station_id = rtcm_station_id;

    rtcm = std::make_shared<Rtcm>(port);

    if(flag_rtcm_server)
        {
            rtcm->run_server();
        }
}


Rtcm_Printer::~Rtcm_Printer()
{
    if(rtcm->is_server_running())
        {
            rtcm->stop_server();
        }
    if (rtcm_file_descriptor.is_open())
        {
            long pos;
            pos = rtcm_file_descriptor.tellp();
            rtcm_file_descriptor.close();
            if (pos == 0)
                {
                    if(remove(rtcm_filename.c_str()) != 0) LOG(INFO) << "Error deleting temporary RTCM file";
                }
        }
    close_serial();
}


bool Rtcm_Printer::Print_Rtcm_MT1001(const Gps_Ephemeris& gps_eph, double obs_time, const std::map<int, Gnss_Synchro> & observables)
{
    std::string m1001 = rtcm->print_MT1001(gps_eph, obs_time, observables, station_id);
    Rtcm_Printer::Print_Message(m1001);
    return true;
}


bool Rtcm_Printer::Print_Rtcm_MT1002(const Gps_Ephemeris& gps_eph, double obs_time, const std::map<int, Gnss_Synchro> & observables)
{
    std::string m1002 = rtcm->print_MT1002(gps_eph, obs_time, observables, station_id);
    Rtcm_Printer::Print_Message(m1002);
    return true;
}


bool Rtcm_Printer::Print_Rtcm_MT1003(const Gps_Ephemeris& gps_eph, const Gps_CNAV_Ephemeris& cnav_eph, double obs_time, const std::map<int, Gnss_Synchro> & observables)
{
    std::string m1003 = rtcm->print_MT1003(gps_eph, cnav_eph, obs_time, observables, station_id);
    Rtcm_Printer::Print_Message(m1003);
    return true;
}


bool Rtcm_Printer::Print_Rtcm_MT1004(const Gps_Ephemeris& gps_eph, const Gps_CNAV_Ephemeris& cnav_eph, double obs_time, const std::map<int, Gnss_Synchro> & observables)
{
    std::string m1003 = rtcm->print_MT1004(gps_eph, cnav_eph, obs_time, observables, station_id);
    Rtcm_Printer::Print_Message(m1003);
    return true;
}


bool Rtcm_Printer::Print_Rtcm_MT1019(const Gps_Ephemeris & gps_eph)
{
    std::string m1019 = rtcm->print_MT1019(gps_eph);
    Rtcm_Printer::Print_Message(m1019);
    return true;
}


bool Rtcm_Printer::Print_Rtcm_MT1045(const Galileo_Ephemeris & gal_eph)
{
    std::string m1045 = rtcm->print_MT1045(gal_eph);
    Rtcm_Printer::Print_Message(m1045);
    return true;
}


bool Rtcm_Printer::Print_Rtcm_MSM(unsigned int msm_number, const Gps_Ephemeris & gps_eph,
        const Gps_CNAV_Ephemeris & gps_cnav_eph,
        const Galileo_Ephemeris & gal_eph,
        double obs_time,
        const std::map<int, Gnss_Synchro> & observables,
        unsigned int clock_steering_indicator,
        unsigned int external_clock_indicator,
        int smooth_int,
        bool divergence_free,
        bool more_messages)
{
    std::string msm;
    if(msm_number == 1)
        {
            msm = rtcm->print_MSM_1(gps_eph, gps_cnav_eph, gal_eph, obs_time, observables, station_id, clock_steering_indicator, external_clock_indicator, smooth_int, divergence_free, more_messages);
        }
    else if(msm_number == 2)
        {
            msm = rtcm->print_MSM_2(gps_eph, gps_cnav_eph, gal_eph, obs_time, observables, station_id, clock_steering_indicator, external_clock_indicator, smooth_int, divergence_free, more_messages);
        }
    else if(msm_number == 3)
        {
            msm = rtcm->print_MSM_3(gps_eph, gps_cnav_eph, gal_eph, obs_time, observables, station_id, clock_steering_indicator, external_clock_indicator, smooth_int, divergence_free, more_messages);
        }
    else if(msm_number == 4)
        {
            msm = rtcm->print_MSM_4(gps_eph, gps_cnav_eph, gal_eph, obs_time, observables, station_id, clock_steering_indicator, external_clock_indicator, smooth_int, divergence_free, more_messages);
        }
    else if(msm_number == 5)
        {
            msm = rtcm->print_MSM_5(gps_eph, gps_cnav_eph, gal_eph, obs_time, observables, station_id, clock_steering_indicator, external_clock_indicator, smooth_int, divergence_free, more_messages);
        }
    else if(msm_number == 6)
        {
            msm = rtcm->print_MSM_6(gps_eph, gps_cnav_eph, gal_eph, obs_time, observables, station_id, clock_steering_indicator, external_clock_indicator, smooth_int, divergence_free, more_messages);
        }
    else if(msm_number == 7)
        {
            msm = rtcm->print_MSM_7(gps_eph, gps_cnav_eph, gal_eph, obs_time, observables, station_id, clock_steering_indicator, external_clock_indicator, smooth_int, divergence_free, more_messages);
        }
    else
        {
            return false;
        }

    Rtcm_Printer::Print_Message(msm);
    return true;
}


int Rtcm_Printer::init_serial(std::string serial_device)
{
    /*
     * Opens the serial device and sets the default baud rate for a RTCM transmission (9600,8,N,1)
     */
    int fd = 0;
    struct termios options;
    long BAUD;
    long DATABITS;
    long STOPBITS;
    long PARITYON;
    long PARITY;

    fd = open(serial_device.c_str(), O_RDWR | O_NOCTTY | O_NDELAY);
    if (fd == -1) return fd;  // failed to open TTY port

    if(fcntl(fd, F_SETFL, 0) == -1) LOG(INFO) << "Error enabling direct I/O";    // clear all flags on descriptor, enable direct I/O
    tcgetattr(fd, &options);  // read serial port options

    BAUD  = B9600;
    //BAUD  =  B38400;
    DATABITS = CS8;
    STOPBITS = 0;
    PARITYON = 0;
    PARITY = 0;

    options.c_cflag = BAUD | DATABITS | STOPBITS | PARITYON | PARITY | CLOCAL | CREAD;
    // enable receiver, set 8 bit data, ignore control lines
    //options.c_cflag |= (CLOCAL | CREAD | CS8);
    options.c_iflag = IGNPAR;

    // set the new port options
    tcsetattr(fd, TCSANOW, &options);
    return fd;
}


void Rtcm_Printer::close_serial()
{
    if (rtcm_dev_descriptor != -1)
        {
            close(rtcm_dev_descriptor);
        }
}


bool Rtcm_Printer::Print_Message(const std::string & message)
{
    //write to file
    try
    {
            rtcm_file_descriptor << message << std::endl;
    }
    catch(std::exception ex)
    {
            DLOG(INFO) << "RTCM printer can not write on output file" << rtcm_filename.c_str();
            return false;
    }

    //write to serial device
    if (rtcm_dev_descriptor != -1)
        {
            if(write(rtcm_dev_descriptor, message.c_str(), message.length()) == -1)
                {
                    DLOG(INFO) << "RTCM printer cannot write on serial device" << rtcm_devname.c_str();
                    std::cout << "RTCM printer cannot write on serial device" << rtcm_devname.c_str() << std::endl;
                    return false;
                }
        }
    return true;
}


std::string Rtcm_Printer::print_MT1005_test()
{
    std::string test = rtcm->print_MT1005_test();
    return test;
}


unsigned int Rtcm_Printer::lock_time(const Gps_Ephemeris& eph, double obs_time, const Gnss_Synchro & gnss_synchro)
{
    return rtcm->lock_time(eph, obs_time, gnss_synchro);
}


unsigned int Rtcm_Printer::lock_time(const Gps_CNAV_Ephemeris& eph, double obs_time, const Gnss_Synchro & gnss_synchro)
{
    return rtcm->lock_time(eph, obs_time, gnss_synchro);
}


unsigned int Rtcm_Printer::lock_time(const Galileo_Ephemeris& eph, double obs_time, const Gnss_Synchro & gnss_synchro)
{
    return rtcm->lock_time(eph, obs_time, gnss_synchro);
}