/* -*- c++ -*- */
/*
 * Copyright 2013,2015 Free Software Foundation, Inc.
 *
 * This file is part of GNU Radio
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "histogram_sink_f_impl.h"

#include <gnuradio/io_signature.h>
#include <gnuradio/prefs.h>

#include <qwt_symbol.h>
#include <volk/volk.h>

#include <cstring>

namespace gr {
namespace qtgui {

histogram_sink_f::sptr histogram_sink_f::make(int size,
                                              int bins,
                                              double xmin,
                                              double xmax,
                                              const std::string& name,
                                              int nconnections,
                                              QWidget* parent)
{
    return gnuradio::make_block_sptr<histogram_sink_f_impl>(
        size, bins, xmin, xmax, name, nconnections, parent);
}

histogram_sink_f_impl::histogram_sink_f_impl(int size,
                                             int bins,
                                             double xmin,
                                             double xmax,
                                             const std::string& name,
                                             int nconnections,
                                             QWidget* parent)
    : sync_block("histogram_sink_f",
                 io_signature::make(0, nconnections, sizeof(float)),
                 io_signature::make(0, 0, 0)),
      d_size(size),
      d_bins(bins),
      d_xmin(xmin),
      d_xmax(xmax),
      d_name(name),
      d_nconnections(nconnections),
      d_parent(parent)
{
    // Required now for Qt; argc must be greater than 0 and argv
    // must have at least one valid character. Must be valid through
    // life of the qApplication:
    // http://harmattan-dev.nokia.com/docs/library/html/qt4/qapplication.html
    d_argc = 1;
    d_argv = new char;
    d_argv[0] = '\0';

    d_main_gui = NULL;

    d_index = 0;

    // setup PDU handling input port
    message_port_register_in(pmt::mp("in"));
    set_msg_handler(pmt::mp("in"), [this](pmt::pmt_t msg) { this->handle_pdus(msg); });

    // +1 for the PDU buffer
    for (int i = 0; i < d_nconnections + 1; i++) {
        d_residbufs.push_back(
            (double*)volk_malloc(d_size * sizeof(double), volk_get_alignment()));
        memset(d_residbufs[i], 0, d_size * sizeof(double));
    }

    // Set alignment properties for VOLK
    const int alignment_multiple = volk_get_alignment() / sizeof(gr_complex);
    set_alignment(std::max(1, alignment_multiple));

    initialize();
}

histogram_sink_f_impl::~histogram_sink_f_impl()
{
    if (!d_main_gui->isClosed())
        d_main_gui->close();

    // d_main_gui is a qwidget destroyed with its parent
    for (int i = 0; i < d_nconnections + 1; i++) {
        volk_free(d_residbufs[i]);
    }

    delete d_argv;
}

bool histogram_sink_f_impl::check_topology(int ninputs, int noutputs)
{
    return ninputs == d_nconnections;
}

void histogram_sink_f_impl::initialize()
{
    if (qApp != NULL) {
        d_qApplication = qApp;
    } else {
#if QT_VERSION >= 0x040500 && QT_VERSION < 0x050000
        std::string style = prefs::singleton()->get_string("qtgui", "style", "raster");
        QApplication::setGraphicsSystem(QString(style.c_str()));
#endif
        d_qApplication = new QApplication(d_argc, &d_argv);
    }

    // If a style sheet is set in the prefs file, enable it here.
    check_set_qss(d_qApplication);

    int numplots = (d_nconnections > 0) ? d_nconnections : 1;
    d_main_gui = new HistogramDisplayForm(numplots, d_parent);
    d_main_gui->setNumBins(d_bins);
    d_main_gui->setNPoints(d_size);
    d_main_gui->setXaxis(d_xmin, d_xmax);

    if (!d_name.empty())
        set_title(d_name);

    // initialize update time to 10 times a second
    set_update_time(0.1);
}

void histogram_sink_f_impl::exec_() { d_qApplication->exec(); }

QWidget* histogram_sink_f_impl::qwidget() { return d_main_gui; }

#ifdef ENABLE_PYTHON
PyObject* histogram_sink_f_impl::pyqwidget()
{
    PyObject* w = PyLong_FromVoidPtr((void*)d_main_gui);
    PyObject* retarg = Py_BuildValue("N", w);
    return retarg;
}
#else
void* histogram_sink_f_impl::pyqwidget() { return NULL; }
#endif

void histogram_sink_f_impl::set_y_axis(double min, double max)
{
    d_main_gui->setYaxis(min, max);
}

void histogram_sink_f_impl::set_x_axis(double min, double max)
{
    d_main_gui->setXaxis(min, max);
}

void histogram_sink_f_impl::set_update_time(double t)
{
    // convert update time to ticks
    gr::high_res_timer_type tps = gr::high_res_timer_tps();
    d_update_time = t * tps;
    d_main_gui->setUpdateTime(t);
    d_last_time = 0;
}

void histogram_sink_f_impl::set_title(const std::string& title)
{
    d_main_gui->setTitle(title.c_str());
}

void histogram_sink_f_impl::set_line_label(unsigned int which, const std::string& label)
{
    d_main_gui->setLineLabel(which, label.c_str());
}

void histogram_sink_f_impl::set_line_color(unsigned int which, const std::string& color)
{
    d_main_gui->setLineColor(which, color.c_str());
}

void histogram_sink_f_impl::set_line_width(unsigned int which, int width)
{
    d_main_gui->setLineWidth(which, width);
}

void histogram_sink_f_impl::set_line_style(unsigned int which, int style)
{
    d_main_gui->setLineStyle(which, (Qt::PenStyle)style);
}

void histogram_sink_f_impl::set_line_marker(unsigned int which, int marker)
{
    d_main_gui->setLineMarker(which, (QwtSymbol::Style)marker);
}

void histogram_sink_f_impl::set_line_alpha(unsigned int which, double alpha)
{
    d_main_gui->setMarkerAlpha(which, (int)(255.0 * alpha));
}

void histogram_sink_f_impl::set_size(int width, int height)
{
    d_main_gui->resize(QSize(width, height));
}

std::string histogram_sink_f_impl::title() { return d_main_gui->title().toStdString(); }

std::string histogram_sink_f_impl::line_label(unsigned int which)
{
    return d_main_gui->lineLabel(which).toStdString();
}

std::string histogram_sink_f_impl::line_color(unsigned int which)
{
    return d_main_gui->lineColor(which).toStdString();
}

int histogram_sink_f_impl::line_width(unsigned int which)
{
    return d_main_gui->lineWidth(which);
}

int histogram_sink_f_impl::line_style(unsigned int which)
{
    return d_main_gui->lineStyle(which);
}

int histogram_sink_f_impl::line_marker(unsigned int which)
{
    return d_main_gui->lineMarker(which);
}

double histogram_sink_f_impl::line_alpha(unsigned int which)
{
    return (double)(d_main_gui->markerAlpha(which)) / 255.0;
}

void histogram_sink_f_impl::set_nsamps(const int newsize)
{
    gr::thread::scoped_lock lock(d_setlock);

    if (newsize != d_size) {
        // Resize residbuf and replace data
        for (int i = 0; i < d_nconnections + 1; i++) {
            volk_free(d_residbufs[i]);
            d_residbufs[i] =
                (double*)volk_malloc(newsize * sizeof(double), volk_get_alignment());

            memset(d_residbufs[i], 0, newsize * sizeof(double));
        }

        // Set new size and reset buffer index
        // (throws away any currently held data, but who cares?)
        d_size = newsize;
        d_index = 0;

        d_main_gui->setNPoints(d_size);
    }
}

void histogram_sink_f_impl::set_bins(const int bins)
{
    gr::thread::scoped_lock lock(d_setlock);
    d_bins = bins;
    d_main_gui->setNumBins(d_bins);
}

int histogram_sink_f_impl::nsamps() const { return d_size; }

int histogram_sink_f_impl::bins() const { return d_bins; }

void histogram_sink_f_impl::npoints_resize()
{
    int newsize = d_main_gui->getNPoints();
    set_nsamps(newsize);
}

void histogram_sink_f_impl::enable_menu(bool en) { d_main_gui->enableMenu(en); }

void histogram_sink_f_impl::enable_grid(bool en) { d_main_gui->setGrid(en); }

void histogram_sink_f_impl::enable_axis_labels(bool en) { d_main_gui->setAxisLabels(en); }

void histogram_sink_f_impl::enable_autoscale(bool en) { d_main_gui->autoScale(en); }

void histogram_sink_f_impl::enable_semilogx(bool en) { d_main_gui->setSemilogx(en); }

void histogram_sink_f_impl::enable_semilogy(bool en) { d_main_gui->setSemilogy(en); }

void histogram_sink_f_impl::enable_accumulate(bool en) { d_main_gui->setAccumulate(en); }

void histogram_sink_f_impl::disable_legend() { d_main_gui->disableLegend(); }

void histogram_sink_f_impl::autoscalex() { d_main_gui->autoScaleX(); }

void histogram_sink_f_impl::reset() { d_index = 0; }

int histogram_sink_f_impl::work(int noutput_items,
                                gr_vector_const_void_star& input_items,
                                gr_vector_void_star& output_items)
{
    int n = 0, j = 0, idx = 0;
    const float* in = (const float*)input_items[idx];

    npoints_resize();

    for (int i = 0; i < noutput_items; i += d_size) {
        unsigned int datasize = noutput_items - i;
        unsigned int resid = d_size - d_index;
        idx = 0;

        // If we have enough input for one full plot, do it
        if (datasize >= resid) {

            // Fill up residbufs with d_size number of items
            for (n = 0; n < d_nconnections; n++) {
                in = (const float*)input_items[idx++];
                volk_32f_convert_64f_u(&d_residbufs[n][d_index], &in[j], resid);
            }

            // Update the plot if its time
            if (gr::high_res_timer_now() - d_last_time > d_update_time) {
                d_last_time = gr::high_res_timer_now();
                d_qApplication->postEvent(d_main_gui,
                                          new HistogramUpdateEvent(d_residbufs, d_size));
            }

            d_index = 0;
            j += resid;
        }
        // Otherwise, copy what we received into the residbufs for next time
        // because we set the output_multiple, this should never need to be called
        else {
            for (n = 0; n < d_nconnections; n++) {
                in = (const float*)input_items[idx++];
                volk_32f_convert_64f_u(&d_residbufs[n][d_index], &in[j], datasize);
            }
            d_index += datasize;
            j += datasize;
        }
    }

    return j;
}

void histogram_sink_f_impl::handle_pdus(pmt::pmt_t msg)
{
    size_t len;
    pmt::pmt_t dict, samples;

    // Test to make sure this is either a PDU or a uniform vector of
    // samples. Get the samples PMT and the dictionary if it's a PDU.
    // If not, we throw an error and exit.
    if (pmt::is_pair(msg)) {
        dict = pmt::car(msg);
        samples = pmt::cdr(msg);
    } else if (pmt::is_uniform_vector(msg)) {
        samples = msg;
    } else {
        throw std::runtime_error("time_sink_c: message must be either "
                                 "a PDU or a uniform vector of samples.");
    }

    len = pmt::length(samples);

    const float* in;
    if (pmt::is_f32vector(samples)) {
        in = (const float*)pmt::f32vector_elements(samples, len);
    } else {
        throw std::runtime_error("histogram_sink_f: unknown data type "
                                 "of samples; must be float.");
    }

    // Plot if we're past the last update time
    if (gr::high_res_timer_now() - d_last_time > d_update_time) {
        d_last_time = gr::high_res_timer_now();

        npoints_resize();

        // Clear the histogram
        if (!d_main_gui->getAccumulate()) {
            d_qApplication->postEvent(d_main_gui, new HistogramClearEvent());

            // Set to accumulate over length of the current PDU
            d_qApplication->postEvent(d_main_gui, new HistogramSetAccumulator(true));
        }

        float nplots_f = static_cast<float>(len) / static_cast<float>(d_size);
        int nplots = static_cast<int>(ceilf(nplots_f));
        int idx = 0;
        for (int n = 0; n < nplots; n++) {
            int size = std::min(d_size, (int)(len - idx));
            volk_32f_convert_64f_u(d_residbufs[d_nconnections], &in[idx], size);

            d_qApplication->postEvent(d_main_gui,
                                      new HistogramUpdateEvent(d_residbufs, size));

            idx += size;
        }

        if (!d_main_gui->getAccumulate()) {
            // Turn accumulation off
            d_qApplication->postEvent(d_main_gui, new HistogramSetAccumulator(false));
        }
    }
}

} /* namespace qtgui */
} /* namespace gr */
