/*!
 * \file plutosdr_signal_source.cc
 * \brief Signal source for PlutoSDR
 * \author Rodrigo Muñoz, 2017, rmunozl(at)inacap.cl
 *
 * -------------------------------------------------------------------------
 *
 * Copyright (C) 2010-2018  (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 <https://www.gnu.org/licenses/>.
 *
 * -------------------------------------------------------------------------
 */

#include "plutosdr_signal_source.h"
#include "GPS_L1_CA.h"
#include "configuration_interface.h"
#include "gnss_sdr_valve.h"
#include <glog/logging.h>
#include <iostream>
#include <utility>


PlutosdrSignalSource::PlutosdrSignalSource(ConfigurationInterface* configuration,
    const std::string& role, unsigned int in_stream, unsigned int out_stream,
    boost::shared_ptr<gr::msg_queue> queue) : role_(role), in_stream_(in_stream), out_stream_(out_stream), queue_(std::move(queue))
{
    std::string default_item_type = "gr_complex";
    std::string default_dump_file = "./data/signal_source.dat";
    uri_ = configuration->property(role + ".device_address", std::string("192.168.2.1"));
    freq_ = configuration->property(role + ".freq", GPS_L1_FREQ_HZ);
    sample_rate_ = configuration->property(role + ".sampling_frequency", 3000000);
    bandwidth_ = configuration->property(role + ".bandwidth", 2000000);
    buffer_size_ = configuration->property(role + ".buffer_size", 0xA0000);
    quadrature_ = configuration->property(role + ".quadrature", true);
    rf_dc_ = configuration->property(role + ".rf_dc", true);
    bb_dc_ = configuration->property(role + ".bb_dc", true);
    gain_mode_ = configuration->property(role + ".gain_mode", std::string("manual"));
    rf_gain_ = configuration->property(role + ".gain", 50.0);
    filter_file_ = configuration->property(role + ".filter_file", std::string(""));
    filter_auto_ = configuration->property(role + ".filter_auto", true);

    item_type_ = configuration->property(role + ".item_type", default_item_type);
    samples_ = configuration->property(role + ".samples", 0);
    dump_ = configuration->property(role + ".dump", false);
    dump_filename_ = configuration->property(role + ".dump_filename", default_dump_file);

    if (item_type_ != "gr_complex")
        {
            std::cout << "Configuration error: item_type must be gr_complex" << std::endl;
            LOG(FATAL) << "Configuration error: item_type must be gr_complex!";
        }

    item_size_ = sizeof(gr_complex);

    std::cout << "device address: " << uri_ << std::endl;
    std::cout << "frequency : " << freq_ << " Hz" << std::endl;
    std::cout << "sample rate: " << sample_rate_ << " Hz" << std::endl;
    std::cout << "gain mode: " << gain_mode_ << std::endl;
    std::cout << "item type: " << item_type_ << std::endl;

    plutosdr_source_ = gr::iio::pluto_source::make(uri_, freq_, sample_rate_,
        bandwidth_, buffer_size_, quadrature_, rf_dc_, bb_dc_,
        gain_mode_.c_str(), rf_gain_, filter_file_.c_str(), filter_auto_);

    if (samples_ != 0)
        {
            DLOG(INFO) << "Send STOP signal after " << samples_ << " samples";
            valve_ = gnss_sdr_make_valve(item_size_, samples_, queue_);
            DLOG(INFO) << "valve(" << valve_->unique_id() << ")";
        }

    if (dump_)
        {
            DLOG(INFO) << "Dumping output into file " << dump_filename_;
            file_sink_ = gr::blocks::file_sink::make(item_size_, dump_filename_.c_str());
            DLOG(INFO) << "file_sink(" << file_sink_->unique_id() << ")";
        }
    if (in_stream_ > 0)
        {
            LOG(ERROR) << "A signal source does not have an input stream";
        }
    if (out_stream_ > 1)
        {
            LOG(ERROR) << "This implementation only supports one output stream";
        }
}


PlutosdrSignalSource::~PlutosdrSignalSource() = default;


void PlutosdrSignalSource::connect(gr::top_block_sptr top_block)
{
    if (samples_ != 0)
        {
            top_block->connect(plutosdr_source_, 0, valve_, 0);
            DLOG(INFO) << "connected plutosdr source to valve";
            if (dump_)
                {
                    top_block->connect(valve_, 0, file_sink_, 0);
                    DLOG(INFO) << "connected valve to file sink";
                }
        }
    else
        {
            if (dump_)
                {
                    top_block->connect(plutosdr_source_, 0, file_sink_, 0);
                    DLOG(INFO) << "connected plutosdr source to file sink";
                }
        }
}


void PlutosdrSignalSource::disconnect(gr::top_block_sptr top_block)
{
    if (samples_ != 0)
        {
            top_block->disconnect(plutosdr_source_, 0, valve_, 0);
            if (dump_)
                {
                    top_block->disconnect(valve_, 0, file_sink_, 0);
                }
        }
    else
        {
            if (dump_)
                {
                    top_block->disconnect(plutosdr_source_, 0, file_sink_, 0);
                }
        }
}


gr::basic_block_sptr PlutosdrSignalSource::get_left_block()
{
    LOG(WARNING) << "Trying to get signal source left block.";
    return gr::basic_block_sptr();
}


gr::basic_block_sptr PlutosdrSignalSource::get_right_block()
{
    if (samples_ != 0)
        {
            return valve_;
        }
    else
        {
            return plutosdr_source_;
        }
}