/*

  Copyright © 2017 Hasan Yavuz Özderya

  This file is part of serialplot.

  serialplot 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.

  serialplot 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 serialplot.  If not, see <http://www.gnu.org/licenses/>.

*/

#include <QVariant>

#include <QMessageBox>

#include <QCheckBox>

#include <math.h>

#include "color_selector.hpp"

#include "plotcontrolpanel.h"

#include "ui_plotcontrolpanel.h"

#include "setting_defines.h"

/// Confirm if #samples is being set to a value greater than this

/// Used for scale range selection combobox

struct Range

{

    double rmin;

    double rmax;

};

Q_DECLARE_METATYPE(Range);

PlotControlPanel::PlotControlPanel(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::PlotControlPanel),

    resetAct(tr("Reset"), this),

    resetNamesAct(tr("Reset Names"), this),

    resetColorsAct(tr("Reset Colors"), this),

    showAllAct(tr("Show All"), this),

    resetMenu(tr("Reset Menu"), this)

{

    ui->setupUi(this);

    warnNumOfSamples = true;    // TODO: load from settings

    _numOfSamples = ui->spNumOfSamples->value();

    // set limits for axis limit boxes

    ui->spYmin->setRange((-1) * std::numeric_limits<double>::max(),

                         std::numeric_limits<double>::max());

    ui->spYmax->setRange((-1) * std::numeric_limits<double>::max(),

                         std::numeric_limits<double>::max());

    ui->spXmin->setRange((-1) * std::numeric_limits<double>::max(),

                         std::numeric_limits<double>::max());

    ui->spXmax->setRange((-1) * std::numeric_limits<double>::max(),

                         std::numeric_limits<double>::max());

    // connect signals

    connect(ui->spNumOfSamples, SIGNAL(valueChanged(int)),

            this, SLOT(onNumOfSamples(int)));

    connect(ui->cbAutoScale, &QCheckBox::toggled,

            this, &PlotControlPanel::onAutoScaleChecked);

    connect(ui->spYmax, SIGNAL(valueChanged(double)),

            this, SLOT(onYScaleChanged()));

    connect(ui->spYmin, SIGNAL(valueChanged(double)),

            this, SLOT(onYScaleChanged()));

    connect(ui->cbIndex, &QCheckBox::toggled,

            this, &PlotControlPanel::onIndexChecked);

    connect(ui->spXmax, SIGNAL(valueChanged(double)),

            this, SLOT(onXScaleChanged()));

    connect(ui->spXmin, SIGNAL(valueChanged(double)),

            this, SLOT(onXScaleChanged()));

    connect(ui->spPlotWidth, SIGNAL(valueChanged(int)),

            this, SLOT(onPlotWidthChanged()));

    // init scale range preset list

    for (int nbits = 8; nbits <= 24; nbits++) // signed binary formats

    {

        int rmax = pow(2, nbits-1)-1;

        int rmin = -rmax-1;

        Range r = {double(rmin),  double(rmax)};

        ui->cbRangePresets->addItem(

            QString().sprintf("Signed %d bits %d to +%d", nbits, rmin, rmax),

            QVariant::fromValue(r));

    }

    for (int nbits = 8; nbits <= 24; nbits++) // unsigned binary formats

    {

        int rmax = pow(2, nbits)-1;

        ui->cbRangePresets->addItem(

            QString().sprintf("Unsigned %d bits %d to +%d", nbits, 0, rmax),

            QVariant::fromValue(Range{0, double(rmax)}));

    }

    ui->cbRangePresets->addItem("-1 to +1", QVariant::fromValue(Range{-1, +1}));

    ui->cbRangePresets->addItem("0 to +1", QVariant::fromValue(Range{0, +1}));

    ui->cbRangePresets->addItem("-100 to +100", QVariant::fromValue(Range{-100, +100}));

    ui->cbRangePresets->addItem("0 to +100", QVariant::fromValue(Range{0, +100}));

    QObject::connect(ui->cbRangePresets, SIGNAL(activated(int)),

                     this, SLOT(onRangeSelected()));

    // color selector starts disabled until a channel is selected

    ui->colorSelector->setColor(QColor(0,0,0,0));

    ui->colorSelector->setDisplayMode(color_widgets::ColorPreview::AllAlpha);

    ui->colorSelector->setDisabled(true);

    // reset button

    resetMenu.addAction(&resetNamesAct);

    resetMenu.addAction(&resetColorsAct);

    resetMenu.addAction(&showAllAct);

        <property name="sizeConstraint">

         <enum>QLayout::SetMaximumSize</enum>

        </property>

        <item>

         <widget class="color_widgets::ColorSelector" name="colorSelector" native="true">

          <property name="sizePolicy">

           <sizepolicy hsizetype="Maximum" vsizetype="Preferred">

            <horstretch>0</horstretch>

            <verstretch>0</verstretch>

           </sizepolicy>

          </property>

          <property name="minimumSize">

           <size>

            <width>20</width>

            <height>20</height>

           </size>

          </property>

          <property name="maximumSize">

           <size>

            <width>20</width>

            <height>20</height>

           </size>

          </property>

         </widget>

        </item>

        <item>

         <spacer name="horizontalSpacer">

          <property name="orientation">

           <enum>Qt::Horizontal</enum>

          </property>

          <property name="sizeHint" stdset="0">

           <size>

            <width>1</width>

            <height>20</height>

           </size>

          </property>

         </spacer>

        </item>

        <item>

         <widget class="QToolButton" name="tbReset">

          <property name="text">

           <string>Reset</string>

          </property>

          <property name="popupMode">

           <enum>QToolButton::MenuButtonPopup</enum>

          </property>

          <property name="arrowType">

           <enum>Qt::NoArrow</enum>

          </property>

         </widget>

        </item>

       </layout>

      </item>

     </layout>

    </widget>

   </item>

   <item>

    <widget class="Line" name="line">

     <property name="orientation">

      <enum>Qt::Vertical</enum>

     </property>

    </widget>

   </item>

   <item>

    <layout class="QFormLayout" name="formLayout_2">

     <property name="fieldGrowthPolicy">

      <enum>QFormLayout::FieldsStayAtSizeHint</enum>

     </property>

     <item row="0" column="0">

      <widget class="QLabel" name="label_3">

       <property name="toolTip">

        <string/>

       </property>

       <property name="text">

        <string>Buffer Size:</string>

       </property>

      </widget>

     </item>

     <item row="0" column="1">

      <widget class="QSpinBox" name="spNumOfSamples">

       <property name="minimumSize">

        <size>

         <width>80</width>

         <height>0</height>

        </size>

       </property>

       <property name="toolTip">

        <string>Length of acquisition as number of samples</string>

       </property>

       <property name="keyboardTracking">

        <bool>false</bool>

       </property>

       <property name="minimum">

        <number>2</number>

       </property>

       <property name="maximum">

       </property>

       <property name="value">

        <number>1000</number>

       </property>

      </widget>

     </item>

     <item row="2" column="0">

      <widget class="QCheckBox" name="cbIndex">

       <property name="text">

        <string>Index as X AXis</string>

       </property>

       <property name="checked">

        <bool>true</bool>

       </property>

      </widget>

     </item>

     <item row="2" column="1">

      <layout class="QHBoxLayout" name="horizontalLayout_4">

       <item>

        <widget class="QLabel" name="lXmin">

         <property name="enabled">

          <bool>false</bool>

         </property>

         <property name="text">

          <string>Xmin</string>

         </property>

        </widget>

       </item>

       <item>

        <widget class="QDoubleSpinBox" name="spXmin">

         <property name="enabled">

          <bool>false</bool>

         </property>

         <property name="minimumSize">

          <size>

           <width>75</width>

           <height>0</height>

          </size>

         </property>

         <property name="maximumSize">

          <size>

           <width>75</width>

           <height>16777215</height>

          </size>

         </property>

         <property name="toolTip">

          <string>lower limit of Y axis</string>

         </property>

         <property name="value">

          <double>0.000000000000000</double>

         </property>

        </widget>

       </item>

       <item>

        <widget class="QLabel" name="lXmax">

         <property name="enabled">

          <bool>false</bool>

         </property>

         <property name="text">

          <string>Xmax</string>

         </property>

        </widget>

       </item>

       <item>

        <widget class="QDoubleSpinBox" name="spXmax">

         <property name="enabled">

          <bool>false</bool>

         </property>

         <property name="maximumSize">

          <size>

           <width>75</width>

           <height>16777215</height>

          </size>

         </property>

         <property name="toolTip">

          <string>upper limit of Y axis</string>

         </property>

         <property name="maximum">

          <double>1000.000000000000000</double>

         </property>

         <property name="value">

          <double>1000.000000000000000</double>

         </property>

        </widget>

       </item>

      </layout>

     </item>

     <item row="3" column="0">

      <widget class="QCheckBox" name="cbAutoScale">

       <property name="text">

        <string>Auto Scale Y Axis</string>

       </property>

       <property name="checked">

        <bool>true</bool>

       </property>

      </widget>