/* -*- c++ -*- */
/*
 * Copyright 2014 Free Software Foundation, Inc.
 *
 * This file is part of GNU Radio
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 */

#include <gnuradio/qtgui/numberdisplayform.h>

#include <qwt_color_map.h>
#include <QFileDialog>
#include <QMessageBox>

#include <cmath>
#include <iostream>

NumberDisplayForm::NumberDisplayForm(int nplots, gr::qtgui::graph_t type, QWidget* parent)
    : QWidget(parent)
{
    d_nplots = nplots;
    d_graph_type = type;
    d_title = new QLabel(QString(""));
    d_layout = new QGridLayout(this);
    d_layout->setContentsMargins(0, 0, 0, 0);
    for (unsigned int i = 0; i < d_nplots; ++i) {
        d_min.push_back(+1e32);
        d_max.push_back(-1e32);
        d_label.push_back(new QLabel(QString("Data %1").arg(i)));
        d_unit.emplace_back("");
        d_factor.push_back(1);
        d_text_box.push_back(new QLabel(QString("0")));

        d_indicator.push_back(new QwtThermo());
        d_indicator[i]->setScale(-1, 1);

#if QWT_VERSION < 0x060100
#else
        d_indicator[i]->setOriginMode(QwtThermo::OriginCustom);
        d_indicator[i]->setOrigin(0.0);
#endif /* if QWT_VERSION < 0x060100 */

        switch (type) {
        case (gr::qtgui::NUM_GRAPH_HORIZ):
#if QWT_VERSION < 0x060100
            d_indicator[i]->setOrientation(Qt::Horizontal, QwtThermo::BottomScale);
#else
            d_indicator[i]->setOrientation(Qt::Horizontal);
#endif /* if QWT_VERSION < 0x060100 */
            d_layout->addWidget(d_label[i], 2 * i, 0);
            d_layout->addWidget(d_text_box[i], 2 * i, 1);
            d_layout->addWidget(d_indicator[i], 2 * i + 1, 1);
            break;
        case (gr::qtgui::NUM_GRAPH_VERT):
#if QWT_VERSION < 0x060100
            d_indicator[i]->setOrientation(Qt::Vertical, QwtThermo::LeftScale);
#else
            d_indicator[i]->setOrientation(Qt::Vertical);
#endif /* if QWT_VERSION < 0x060100 */
            d_layout->addWidget(d_label[i], 0, i);
            d_layout->addWidget(d_text_box[i], 1, i);
            d_layout->addWidget(d_indicator[i], 2, i);
            break;
        case (gr::qtgui::NUM_GRAPH_NONE):
        default:
            d_layout->addWidget(d_label[i], 0, i);
            d_layout->addWidget(d_text_box[i], 1, i);
        }

        setColor(i, QColor("black"), QColor("black"));
    }

    d_avg = 0.0;
    d_update_time = 0.1;

    d_menu_on = true;
    d_menu = new QMenu(this);

    // Create a set of actions for the menu
    d_stop_act = new QAction("Stop", this);
    d_stop_act->setStatusTip(tr("Start/Stop"));
    connect(d_stop_act, SIGNAL(triggered()), this, SLOT(setStop()));
    d_stop_state = false;
    d_menu->addAction(d_stop_act);

    // Menu items for each number line
    for (unsigned int i = 0; i < d_nplots; ++i) {
        d_label_act.push_back(new LineTitleAction(i, this));
        connect(d_label_act[i],
                SIGNAL(whichTrigger(unsigned int, const QString&)),
                this,
                SLOT(setLabel(unsigned int, const QString&)));

        d_label_menu.push_back(new QMenu(tr(""), this));
        d_label_menu[i]->addAction(d_label_act[i]);

        d_color_menu.push_back(new NumberColorMapMenu(i, this));
        connect(d_color_menu[i],
                SIGNAL(whichTrigger(unsigned int, const QColor&, const QColor&)),
                this,
                SLOT(setColor(unsigned int, const QColor&, const QColor&)));
        d_label_menu[i]->addMenu(d_color_menu[i]);

        d_factor_act.push_back(new ItemFloatAct(i, "Factor", this));
        connect(d_factor_act[i],
                SIGNAL(whichTrigger(unsigned int, float)),
                this,
                SLOT(setFactor(unsigned int, float)));
        d_label_menu[i]->addAction(d_factor_act[i]);

        d_menu->addMenu(d_label_menu[i]);
    }

    d_avg_menu = new FFTAverageMenu(this);
    d_avg_menu->setTitle("Average");
    d_avg_menu->setHigh(0.001);
    d_avg_menu->setMedium(0.01);
    d_avg_menu->setLow(0.1);
    connect(d_avg_menu, SIGNAL(whichTrigger(float)), this, SLOT(setAverage(const float)));
    d_menu->addMenu(d_avg_menu);

    d_layout_menu = new NumberLayoutMenu(this);
    connect(d_layout_menu,
            SIGNAL(whichTrigger(gr::qtgui::graph_t)),
            this,
            SLOT(setGraphType(const gr::qtgui::graph_t)));
    d_menu->addMenu(d_layout_menu);

    d_autoscale_act = new QAction("Auto Scale", this);
    d_autoscale_act->setCheckable(true);
    connect(d_autoscale_act, SIGNAL(triggered(bool)), this, SLOT(autoScale(bool)));
    d_autoscale_state = false;
    d_menu->addAction(d_autoscale_act);

    d_update_time_menu = new PopupMenu("Update Time", this);
    connect(d_update_time_menu,
            SIGNAL(whichTrigger(QString)),
            this,
            SLOT(setUpdateTime(QString)));
    d_menu->addAction(d_update_time_menu);

    d_save_act = new QAction("Save", this);
    d_save_act->setStatusTip(tr("Save Figure"));
    connect(d_save_act, SIGNAL(triggered()), this, SLOT(saveFigure()));
    d_menu->addAction(d_save_act);

    setLayout(d_layout);
}

NumberDisplayForm::~NumberDisplayForm()
{
    // Qt deletes children when parent is deleted
}

void NumberDisplayForm::mousePressEvent(QMouseEvent* e)
{
    bool ctrloff = Qt::ControlModifier != QApplication::keyboardModifiers();
    if ((e->button() == Qt::MiddleButton) && ctrloff && (d_menu_on)) {
        if (d_stop_state == false)
            d_stop_act->setText(tr("Stop"));
        else
            d_stop_act->setText(tr("Start"));

        // Update the line titles if changed externally
        for (unsigned int i = 0; i < d_nplots; ++i) {
            d_label_menu[i]->setTitle(label(i).c_str());
        }
        d_menu->exec(e->globalPos());
    }
}

void NumberDisplayForm::setStop(bool on)
{
    if (!on) {
        d_stop_state = false;
    } else {
        d_stop_state = true;
    }
}

void NumberDisplayForm::setStop()
{
    if (d_stop_state == false)
        setStop(true);
    else
        setStop(false);
}

void NumberDisplayForm::saveFigure()
{
    QPixmap qpix = this->grab();

    QString types = QString(tr("JPEG file (*.jpg);;Portable Network Graphics file "
                               "(*.png);;Bitmap file (*.bmp);;TIFF file (*.tiff)"));

    QString filename, filetype;
    QFileDialog* filebox = new QFileDialog(0, "Save Image", "./", types);
    filebox->setViewMode(QFileDialog::Detail);
    if (filebox->exec()) {
        filename = filebox->selectedFiles()[0];
        filetype = filebox->selectedNameFilter();
    } else {
        return;
    }

    if (filetype.contains(".jpg")) {
        qpix.save(filename, "JPEG");
    } else if (filetype.contains(".png")) {
        qpix.save(filename, "PNG");
    } else if (filetype.contains(".bmp")) {
        qpix.save(filename, "BMP");
    } else if (filetype.contains(".tiff")) {
        qpix.save(filename, "TIFF");
    } else {
        qpix.save(filename, "JPEG");
    }

    delete filebox;
}

void NumberDisplayForm::newData(const QEvent* updateEvent)
{
    if (!d_stop_state) {
        NumberUpdateEvent* tevent = (NumberUpdateEvent*)updateEvent;
        const std::vector<float> samples = tevent->getSamples();

        for (unsigned int i = 0; i < d_nplots; ++i) {
            float f = d_factor[i] * samples[i];
            d_text_box[i]->setText(
                QString("%1 %2").arg(f, 4, ' ').arg(QString(d_unit[i].c_str())));
            d_indicator[i]->setValue(f);
            d_min[i] = std::min(d_min[i], f);
            d_max[i] = std::max(d_max[i], f);

            if (d_autoscale_state) {
                d_indicator[i]->setScale(d_min[i], d_max[i]);
            }
        }
    }
}

void NumberDisplayForm::customEvent(QEvent* e)
{
    if (e->type() == NumberUpdateEvent::Type()) {
        newData(e);
    }
}

void NumberDisplayForm::setGraphType(const gr::qtgui::graph_t type)
{
    int off = 0;

    // Remove all widgets from the layout
    QLayoutItem* item;
    while ((item = d_layout->takeAt(0)) != NULL) {
        d_layout->removeItem(item);
    }

    // If we have a title, add it at the 0,0 grid point (top left)
    // set off = 1 to offset the rest of the widgets
    if (d_title->text().length() > 0) {
        d_layout->addWidget(d_title, 0, 0);
        off = 1;
    }

    d_graph_type = type;
    for (unsigned int i = 0; i < d_nplots; ++i) {
        switch (d_graph_type) {
        case (gr::qtgui::NUM_GRAPH_HORIZ):
#if QWT_VERSION < 0x060100
            d_indicator[i]->setOrientation(Qt::Horizontal, QwtThermo::BottomScale);
#else
            d_indicator[i]->setOrientation(Qt::Horizontal);
#endif /* if QWT_VERSION < 0x060100 */
            d_indicator[i]->setVisible(true);
            d_layout->addWidget(d_label[i], 2 * i + off, 0);
            d_layout->addWidget(d_text_box[i], 2 * i + off, 1);
            d_layout->addWidget(d_indicator[i], 2 * i + 1 + off, 1);
            break;
        case (gr::qtgui::NUM_GRAPH_VERT):
#if QWT_VERSION < 0x060100
            d_indicator[i]->setOrientation(Qt::Vertical, QwtThermo::LeftScale);
#else
            d_indicator[i]->setOrientation(Qt::Vertical);
#endif /* if QWT_VERSION < 0x060100 */
            d_indicator[i]->setVisible(true);
            d_layout->addWidget(d_label[i], 0 + off, i);
            d_layout->addWidget(d_text_box[i], 1 + off, i);
            d_layout->addWidget(d_indicator[i], 2 + off, i);
            break;
        case (gr::qtgui::NUM_GRAPH_NONE):
        default:
            d_indicator[i]->setVisible(false);
            d_layout->addWidget(d_label[i], 0 + off, i);
            d_layout->addWidget(d_text_box[i], 1 + off, i);
            break;
        }
    }
}

void NumberDisplayForm::setColor(unsigned int which, const QColor& min, const QColor& max)
{
    QwtLinearColorMap* map = new QwtLinearColorMap();
    map->setColorInterval(min, max);

#if QWT_VERSION < 0x060000
    d_indicator[which]->setFillColor(max);
#else
    d_indicator[which]->setColorMap(map);
#endif /* QWT_VERSION < 0x060000 */
}

void NumberDisplayForm::setColorMin(unsigned int which, QString min)
{
    setColor(which, QColor(min), colorMax(which));
}

void NumberDisplayForm::setColorMax(unsigned int which, QString max)
{
    setColor(which, colorMin(which), QColor(max));
}

void NumberDisplayForm::setLabel(unsigned int which, const std::string& label)
{
    d_label[which]->setText(label.c_str());
}

void NumberDisplayForm::setLabel(unsigned int which, QString label)
{
    d_label[which]->setText(label);
}

void NumberDisplayForm::setAverage(const float avg) { d_avg = avg; }

void NumberDisplayForm::setUpdateTime(const float time) { d_update_time = time; }

void NumberDisplayForm::setUpdateTime(QString time) { setUpdateTime(time.toFloat()); }

void NumberDisplayForm::setScale(unsigned int which, int min, int max)
{
    d_min[which] = min;
    d_max[which] = max;
    d_indicator[which]->setScale(min, max);
#if QWT_VERSION < 0x060100
    d_indicator[which]->setRange(min, max);
#endif
}

void NumberDisplayForm::setScaleMin(unsigned int which, int min)
{
    setScale(which, min, d_max[which]);
}

void NumberDisplayForm::setScaleMax(unsigned int which, int max)
{
    setScale(which, d_min[which], max);
}

gr::qtgui::graph_t NumberDisplayForm::graphType() const { return d_graph_type; }

QColor NumberDisplayForm::colorMin(unsigned int which) const
{
#if QWT_VERSION < 0x060000
    return d_indicator[which]->fillColor();
#else
    QwtLinearColorMap* map =
        static_cast<QwtLinearColorMap*>(d_indicator[which]->colorMap());
    return map->color1();
#endif /* QWT_VERSION < 0x060000 */
}

QColor NumberDisplayForm::colorMax(unsigned int which) const
{
#if QWT_VERSION < 0x060000
    return d_indicator[which]->fillColor();
#else
    QwtLinearColorMap* map =
        static_cast<QwtLinearColorMap*>(d_indicator[which]->colorMap());
    return map->color2();
#endif /* QWT_VERSION < 0x060000 */
}

std::string NumberDisplayForm::label(unsigned int which) const
{
    return d_label[which]->text().toStdString();
}

float NumberDisplayForm::average() const { return d_avg; }

float NumberDisplayForm::updateTime() const { return d_update_time; }

int NumberDisplayForm::scaleMin(unsigned int which) { return d_min[which]; }

int NumberDisplayForm::scaleMax(unsigned int which) { return d_max[which]; }

void NumberDisplayForm::autoScale(bool on)
{
    d_autoscale_state = on;
    d_autoscale_act->setChecked(on);

    // Reset the autoscale limits
    for (unsigned int i = 0; i < d_nplots; ++i) {
        d_min[i] = +1e32;
        d_max[i] = -1e32;
    }
}

std::string NumberDisplayForm::title() const { return d_title->text().toStdString(); }

void NumberDisplayForm::setTitle(const std::string& title)
{
    std::string t = title;
    if (t.length() > 0)
        t = "<b><FONT SIZE=4>" + title + "</b>";
    d_title->setText(QString(t.c_str()));
    setGraphType(d_graph_type);
}

std::string NumberDisplayForm::unit(unsigned int which) const
{
    if (static_cast<size_t>(which) >= d_unit.size())
        throw std::runtime_error("NumberDisplayForm::units: invalid 'which'.");

    return d_unit[which];
}

void NumberDisplayForm::setUnit(unsigned int which, const std::string& unit)
{
    if (static_cast<size_t>(which) >= d_unit.size())
        throw std::runtime_error("NumberDisplayForm::setUnits: invalid 'which'.");

    d_unit[which] = unit;
}

float NumberDisplayForm::factor(unsigned int which) const
{
    if (static_cast<size_t>(which) >= d_factor.size())
        throw std::runtime_error("NumberDisplayForm::factor: invalid 'which'.");

    return d_factor[which];
}

void NumberDisplayForm::setFactor(unsigned int which, float factor)
{
    if (static_cast<size_t>(which) >= d_factor.size())
        throw std::runtime_error("NumberDisplayForm::setFactor: invalid 'which'.");

    d_factor[which] = factor;
}
