/*
    Copyright (c) 2008-2019 Jan W. Krieger (<jan@jkrieger.de>)

    

    This software is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License (LGPL) as published by
    the Free Software Foundation, either version 2 of the License, or
    (at your option) any later version.

    This program 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 Lesser General Public License (LGPL) for more details.

    You should have received a copy of the GNU Lesser General Public License (LGPL)
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/



#include "jkqtplotter/jkqtpgraphssinglecolumnsymbols.h"
#include "jkqtplotter/jkqtpbaseplotter.h"
#include <stdlib.h>
#include <QDebug>
#include <iostream>
#include "jkqtplottertools/jkqtptools.h"
#include "jkqtplotter/jkqtpbaseelements.h"
#include "jkqtplotter/jkqtplotter.h"
#include "jkqtplottertools/jkqtpdrawingtools.h"
#include <random>

#define SmallestGreaterZeroCompare_xvsgz() if ((xvsgz>10.0*DBL_MIN)&&((smallestGreaterZero<10.0*DBL_MIN) || (xvsgz<smallestGreaterZero))) smallestGreaterZero=xvsgz;




JKQTPSingleColumnSymbolsGraph::JKQTPSingleColumnSymbolsGraph(JKQTBasePlotter *parent):
    JKQTPSingleColumnGraph(parent)
{
    color=QColor("red");
    style=Qt::SolidLine;
    lineWidth=2;
    parentPlotStyle=-1;
    symbolSize=12;
    symbolWidth=1;
    symbol=JKQTPNoSymbol;
    dataDirection=DataDirection::Y;
    position=0;

    if (parent) { // get style settings from parent object
        parentPlotStyle=parent->getNextStyle();
        //std::cout<<"got style settings from parent: "<<parentPlotStyle<<std::endl;
        color=parent->getPlotStyle(parentPlotStyle).color();
        style=parent->getPlotStyle(parentPlotStyle).style();
    }
    fillColor=color;
}



JKQTPSingleColumnSymbolsGraph::JKQTPSingleColumnSymbolsGraph(JKQTPlotter *parent):
    JKQTPSingleColumnGraph(parent)
{
    color=QColor("red");
    style=Qt::SolidLine;
    lineWidth=2;
    parentPlotStyle=-1;
    symbolSize=12;
    symbolWidth=1;
    symbol=JKQTPNoSymbol;
    dataDirection=DataDirection::Y;
    position=0;

    if (parent) { // get style settings from parent object
        parentPlotStyle=parent->getNextStyle();
        //std::cout<<"got style settings from parent: "<<parentPlotStyle<<std::endl;
        color=parent->getPlotStyle(parentPlotStyle).color();
        style=parent->getPlotStyle(parentPlotStyle).style();
    }
    fillColor=color;
}


bool JKQTPSingleColumnSymbolsGraph::getXMinMax(double &minx, double &maxx, double &smallestGreaterZero)
{
    if (dataDirection==DataDirection::X) {
        return getDataMinMax(dataColumn, minx, maxx, smallestGreaterZero);
    } else {
        minx=position;
        maxx=position;
        if (positionScatterStyle!=NoScatter) {
            minx=position-width/2;
            maxx=position+width/2;
        }
        return true;
        //smallestGreaterZero=qMax(double(0.0), qMin(baseline, baseline+peakHeight));
    }
}

bool JKQTPSingleColumnSymbolsGraph::getYMinMax(double &miny, double &maxy, double &smallestGreaterZero)
{
    if (dataDirection==DataDirection::Y) {
        return getDataMinMax(dataColumn, miny, maxy, smallestGreaterZero);
    } else {
        miny=position;
        maxy=position;
        if (positionScatterStyle!=NoScatter) {
            miny=position-width/2;
            maxy=position+width/2;
        }
        return true;
        //smallestGreaterZero=qMax(double(0.0), qMin(baseline, baseline+peakHeight));
    }
}

void JKQTPSingleColumnSymbolsGraph::draw(JKQTPEnhancedPainter &painter)
{
#ifdef JKQTBP_AUTOTIMER
    JKQTPAutoOutputTimer jkaaot("JKQTPSingleColumnSymbolsGraph::draw");
#endif
    if (parent==nullptr) return;
    JKQTPDatastore* datastore=parent->getDatastore();
    if (datastore==nullptr) return;
    if (dataColumn<0) return;

    drawErrorsBefore(painter);

    painter.save();

    int imax=static_cast<int>(datastore->getColumn(static_cast<size_t>(dataColumn)).getRows());
    int imin=0;
    // interpret data ranges
    if (datarange_start>-1) {
        imin=qMin(datarange_start, static_cast<int>(imax));
    }
    if (datarange_end>-1) {
        imax=qMin(datarange_end, static_cast<int>(imax));
    }
    if (imax<imin) {
        int h=imin;
        imin=imax;
        imax=h;
    }
    if (imin<0) imin=0;
    if (imax<0) imax=0;

    std::random_device rd; // random number generators:
    std::mt19937 gen{rd()};
    std::uniform_real_distribution<> dRandomScatter{position-width/2.0, position+width/2.0};

    const double symSize=parent->pt2px(painter, symbolSize);


    QVector<QPointF> plotSymbols; // collects symbol locations e.g. for BeeSwarmScatter-plots
    plotSymbols.reserve(qMax(100,imax-imin));
    auto doesCollide=[&plotSymbols,&symSize](double x, double y)->bool {
        for (auto& p: plotSymbols) {
            if (fabs(p.x()-x)<symSize && fabs(p.y()-y)<symSize) {
                return true;
            }
        }
        return false;
    };

    if (dataDirection==DataDirection::X) {
        intSortData();
        for (int iii=imin; iii<imax; iii++) {
            int i=qBound<int>(imin, getDataIndex(static_cast<int>(iii)), imax);
            const double xv=datastore->get(dataColumn,i);
            double yv=position;
            if (positionScatterStyle==RandomScatter) {
                yv=dRandomScatter(gen);
            }
            const double x=transformX(xv);
            double y=transformY(yv);
            if (positionScatterStyle==BeeSwarmScatter) {
                while (doesCollide(x,y)) {
                    if (i%2==0) {
                        y=y-symSize;
                    } else {
                        y=y+symSize;
                    }
                }
            }
            plotSymbols.append(QPointF(x,y));
            if (JKQTPIsOKFloat(xv) && JKQTPIsOKFloat(yv)) {
                JKQTPPlotSymbol(painter, x, y, symbol, symSize, parent->pt2px(painter, symbolWidth*parent->getLineWidthMultiplier()), color, fillColor);
            }
        }
    } else {
        intSortData();
        for (int iii=imin; iii<imax; iii++) {
            int i=qBound<int>(imin, getDataIndex(static_cast<int>(iii)), imax);
            double xv=position;
            if (positionScatterStyle==RandomScatter) {
                xv=dRandomScatter(gen);
            }
            const double yv=datastore->get(dataColumn,i);
            double x=transformX(xv);
            const double y=transformY(yv);
            if (positionScatterStyle==BeeSwarmScatter) {
                while (doesCollide(x,y)) {
                    if (i%2==0) {
                        x=x-symSize;
                    } else {
                        x=x+symSize;
                    }
                }
            }
            plotSymbols.append(QPointF(x,y));
            if (JKQTPIsOKFloat(xv) && JKQTPIsOKFloat(yv)) {
                plotSymbols.append(QPointF(x,y));
                JKQTPPlotSymbol(painter, x, y, symbol, symSize, parent->pt2px(painter, symbolWidth*parent->getLineWidthMultiplier()), color, fillColor);
            }
        }
    }



    painter.restore();

    drawErrorsAfter(painter);
}

void JKQTPSingleColumnSymbolsGraph::drawKeyMarker(JKQTPEnhancedPainter &painter, QRectF &rect)
{
    const double minSize=qMin(rect.width(), rect.height());
    const double maxSize=qMax(rect.width(), rect.height());
    double symbolSize=parent->pt2px(painter, this->symbolSize);
    if (symbolSize>minSize*0.9) symbolSize=minSize*0.9;
    double symbolWidth=parent->pt2px(painter, this->symbolWidth*parent->getLineWidthMultiplier());
    if (symbolWidth>0.3*symbolSize) symbolWidth=0.3*symbolSize;
    double lineWidth=parent->pt2px(painter, this->lineWidth*parent->getLineWidthMultiplier());
    if (lineWidth>0.5*maxSize) lineWidth=0.5*maxSize;

    painter.save();
    QPen p=painter.pen();
    p.setColor(getKeyLabelColor());
    p.setStyle(style);
    p.setWidthF(lineWidth);
    painter.setPen(p);
    JKQTPPlotSymbol(painter, rect.left()+rect.width()/2.0, rect.top()+rect.height()/2.0, symbol, symbolSize, symbolWidth, getKeyLabelColor(), fillColor);
    painter.restore();
}



QPen JKQTPSingleColumnSymbolsGraph::getSymbolPen(JKQTPEnhancedPainter& painter) const {
    QPen p;
    p.setColor(color);
    p.setWidthF(qMax(JKQTPLOTTER_ABS_MIN_LINEWIDTH,parent->pt2px(painter, parent->getLineWidthMultiplier()*symbolWidth)));
    p.setStyle(style);
    p.setJoinStyle(Qt::RoundJoin);
    p.setCapStyle(Qt::RoundCap);
    return p;
}

QBrush JKQTPSingleColumnSymbolsGraph::getBrush(JKQTPEnhancedPainter& /*painter*/) const {
    QBrush b;
    b.setColor(fillColor);
    return b;
}