/* -*- c++ -*- */
/*
 * Copyright 2012 Dimitri Stolnikov <horiz0n@gmx.net>
 *
 * GNU Radio 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, or (at your option)
 * any later version.
 *
 * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */
/*
 * config.h is generated by configure.  It contains the results
 * of probing for features, options etc.  It should be the first
 * file included in your .cc file.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "osmosdr_src_c.h"
#include <gr_io_signature.h>
#include <gr_audio_source.h>
#include <gr_float_to_complex.h>

#include <boost/assign.hpp>

#include <osmosdr_arg_helpers.h>

using namespace boost::assign;

/*
 * Create a new instance of osmosdr_src_c and return
 * a boost shared_ptr.  This is effectively the public constructor.
 */
osmosdr_src_c_sptr
osmosdr_make_src_c (const std::string &args)
{
  return gnuradio::get_initial_sptr(new osmosdr_src_c (args));
}

/*
 * The private constructor
 */
osmosdr_src_c::osmosdr_src_c (const std::string &args)
  : gr_hier_block2 ("osmosdr_src_c",
        gr_make_io_signature (0, 0, sizeof (gr_complex)),
        args_to_io_signature(args)),
    osmosdr_rx_control(args)
{
  std::string dev_name;
  unsigned int dev_index = 0, mcr = 0;
  size_t nchan = 1;

  dict_t dict = params_to_dict(args);

  if (dict.count("osmosdr"))
    dev_index = boost::lexical_cast< unsigned int >( dict["osmosdr"] );

  if (dict.count("mcr"))
    mcr = (unsigned int) boost::lexical_cast< double >( dict["mcr"] );

  if (dict.count("nchan"))
    nchan = boost::lexical_cast< size_t >( dict["nchan"] );

  std::vector< std::string > devices = osmosdr_control::find_devices();

  if ( devices.size() )
    dev_name = devices[dev_index];
  else
    throw std::runtime_error("No OsmoSDR devices found.");

  /* Audio source; sample rate is 500kHz by default */
  audio_source::sptr src = audio_make_source(500000, dev_name, true);

  /* block to convert stereo audio to a complex stream */
  gr_float_to_complex_sptr f2c = gr_make_float_to_complex(1);

  connect(src, 0, f2c, 0); /* Left is I */
  connect(src, 1, f2c, 1); /* Right is Q */
  connect(f2c, 0, self(), 0);

  _auto_gain = false;
}

/*
 * Our virtual destructor.
 */
osmosdr_src_c::~osmosdr_src_c ()
{
  // nothing else required in this example
}

std::vector<std::string> osmosdr_src_c::get_devices()
{
  int id = 0;
  std::vector< std::string > devices;

  BOOST_FOREACH( std::string dev, osmosdr_control::find_devices() ) {
    std::string args = "osmosdr=" + boost::lexical_cast< std::string >( id++ );
    args += ",label='sysmocom OsmoSDR'";
    devices.push_back( args );
  }

  return devices;
}

size_t osmosdr_src_c::get_num_channels()
{
  return 1;
}

osmosdr::meta_range_t osmosdr_src_c::get_sample_rates()
{
  osmosdr::meta_range_t range;

  range += osmosdr::range_t( 1024000 ); // known to work
  range += osmosdr::range_t( 1800000 ); // known to work
  range += osmosdr::range_t( 2048000 ); // known to work
  range += osmosdr::range_t( 2400000 ); // may work
  range += osmosdr::range_t( 2600000 ); // may work
  range += osmosdr::range_t( 2800000 ); // may work
  range += osmosdr::range_t( 3000000 ); // may work
  range += osmosdr::range_t( 3200000 ); // max rate, may work

  // TODO: read from the libosmosdr as soon as the api is available

  return range;
}

double osmosdr_src_c::set_sample_rate(double rate)
{
//  if (_dev) {
//    osmosdr_set_sample_rate( _dev, (uint32_t)rate );
//  }

  return get_sample_rate();
}

double osmosdr_src_c::get_sample_rate()
{
//  if (_dev)
//    return (double)osmosdr_get_sample_rate( _dev );

  return 0;
}

osmosdr::freq_range_t osmosdr_src_c::get_freq_range( size_t chan )
{
  osmosdr::freq_range_t range;

  range += osmosdr::range_t( 50e6, 2.2e9, 100 );

  // TODO: read from the libosmosdr as soon as the api is available

  return range;
}

double osmosdr_src_c::set_center_freq( double freq, size_t chan )
{
//  if (_dev)
//    osmosdr_set_center_freq( _dev, (uint32_t)freq );

  return get_center_freq( chan );
}

double osmosdr_src_c::get_center_freq( size_t chan )
{
//  if (_dev)
//    return (double)osmosdr_get_center_freq( _dev );

  return 0;
}

double osmosdr_src_c::set_freq_corr( double ppm, size_t chan )
{
//  if ( _dev )
//    osmosdr_set_freq_correction( _dev, (int)ppm );

  return get_freq_corr( chan );
}

double osmosdr_src_c::get_freq_corr( size_t chan )
{
//  if ( _dev )
//    return (double)osmosdr_get_freq_correction( _dev );

  return 0;
}

std::vector<std::string> osmosdr_src_c::get_gain_names( size_t chan )
{
  std::vector< std::string > antennas;

  antennas += "LNA";

  return antennas;
}

osmosdr::gain_range_t osmosdr_src_c::get_gain_range( size_t chan )
{
  osmosdr::gain_range_t range;

  range += osmosdr::range_t( -1.0 );
  range += osmosdr::range_t( 1.5 );
  range += osmosdr::range_t( 4.0 );
  range += osmosdr::range_t( 6.5 );
  range += osmosdr::range_t( 9.0 );
  range += osmosdr::range_t( 11.5 );
  range += osmosdr::range_t( 14.0 );
  range += osmosdr::range_t( 16.5 );
  range += osmosdr::range_t( 19.0 );
  range += osmosdr::range_t( 21.5 );
  range += osmosdr::range_t( 24.0 );
  range += osmosdr::range_t( 29.0 );
  range += osmosdr::range_t( 34.0 );
  range += osmosdr::range_t( 42.0 );
  range += osmosdr::range_t( 43.0 );
  range += osmosdr::range_t( 45.0 );
  range += osmosdr::range_t( 47.0 );
  range += osmosdr::range_t( 49.0 );

  // TODO: read from the libosmosdr as soon as the api is available

  return range;
}

osmosdr::gain_range_t osmosdr_src_c::get_gain_range( const std::string & name, size_t chan )
{
  return get_gain_range( chan );
}

bool osmosdr_src_c::set_gain_mode( bool automatic, size_t chan )
{
//  if (_dev) {
//    if (!osmosdr_set_tuner_gain_mode(_dev, int(!automatic))) {
//      _auto_gain = automatic;
//    }
//  }

  return get_gain_mode(chan);
}

bool osmosdr_src_c::get_gain_mode( size_t chan )
{
  return _auto_gain;
}

static double pick_closest_gain(osmosdr::gain_range_t &gains, double required)
{
  double result = required;
  double distance = 100;

  BOOST_FOREACH(osmosdr::range_t gain, gains)
  {
    double diff = fabs(gain.start() - required);

    if (diff < distance) {
      distance = diff;
      result = gain.start();
    }
  }

  return result;
}

double osmosdr_src_c::set_gain( double gain, size_t chan )
{
  osmosdr::gain_range_t gains = osmosdr_src_c::get_gain_range( chan );
  double picked_gain = pick_closest_gain( gains, gain );

//  if (_dev)
//    osmosdr_set_tuner_gain( _dev, int(picked_gain * 10.0) );

  return get_gain( chan );
}

double osmosdr_src_c::set_gain( double gain, const std::string & name, size_t chan)
{
  return set_gain( gain, chan );
}

double osmosdr_src_c::get_gain( size_t chan )
{
//  if ( _dev )
//    return ((double)osmosdr_get_tuner_gain( _dev )) / 10.0;

  return 0;
}

double osmosdr_src_c::get_gain( const std::string & name, size_t chan )
{
  return get_gain( chan );
}

std::vector< std::string > osmosdr_src_c::get_antennas( size_t chan )
{
  std::vector< std::string > antennas;

  antennas += get_antenna( chan );

  return antennas;
}

std::string osmosdr_src_c::set_antenna( const std::string & antenna, size_t chan )
{
  return get_antenna( chan );
}

std::string osmosdr_src_c::get_antenna( size_t chan )
{
  return "ANT";
}