/* -*- c++ -*- */
/*
 * Copyright 2021 Anton Ottosson.
 *
 * This 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.
 *
 * This software 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 this software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <gnuradio/io_signature.h>
#include "extract_csi_impl.h"

namespace gr {
  namespace ieee802_11 {

    extract_csi::sptr
    extract_csi::make()
    {
      return gnuradio::get_initial_sptr
        (new extract_csi_impl());
    }


    extract_csi_impl::extract_csi_impl()
      : gr::sync_block("extract_csi",
              gr::io_signature::make(0, 0, 0),
              gr::io_signature::make(1, 1, 52 * sizeof(gr_complex)))
    {
      message_port_register_in(pmt::mp("pdu in"));
    }

    extract_csi_impl::~extract_csi_impl()
    {
    }

    int
    extract_csi_impl::work(int noutput_items,
        gr_vector_const_void_star &input_items,
        gr_vector_void_star &output_items)
    {
      pmt::pmt_t pdu(delete_head_nowait(pmt::mp("pdu in")));

      if (pdu.get() == NULL) return 0;

      if (!pmt::is_pair(pdu) || !pmt::is_dict(pmt::car(pdu)))
        throw std::runtime_error("received a malformed pdu message");

      d_meta = pmt::car(pdu);

      if (!pmt::dict_has_key(d_meta, pmt::mp("csi"))) return 0;

      d_csi = pmt::c32vector_elements(pmt::dict_ref(d_meta, pmt::mp("csi"), pmt::PMT_NIL));

      gr_complex* out = (gr_complex*) output_items[0];

      std::copy(d_csi.begin(), d_csi.end(), out);

      pmt::pmt_t keys(pmt::dict_keys(d_meta));
      for (int i = 0; i < pmt::length(keys); i++) {
        pmt::pmt_t k(pmt::nth(i, keys));
        pmt::pmt_t v(pmt::dict_ref(d_meta, k, pmt::PMT_NIL));
        add_item_tag(0, nitems_written(0), k, v, alias_pmt());
      }

      return 1;
    }

  } /* namespace ieee802_11 */
} /* namespace gr */