/*
    Copyright (c) 2008-2020 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 2.1 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/graphs/jkqtpbarchartbase.h"
#include "jkqtplotter/jkqtpbaseplotter.h"
#include <stdlib.h>
#include <QDebug>
#include <iostream>
#include "jkqtplotter/jkqtptools.h"
#include "jkqtplotter/graphs/jkqtpimage.h"
#include "jkqtplotter/jkqtpbaseelements.h"
#include "jkqtplotter/jkqtplotter.h"

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






JKQTPBarGraphBase::JKQTPBarGraphBase(JKQTBasePlotter* parent):
    JKQTPXYBaselineGraph(parent), width(0.9), shift(0)
{
    initFillStyle(parent, parentPlotStyle, JKQTPPlotStyleType::Barchart);
    initLineStyle(parent, parentPlotStyle, JKQTPPlotStyleType::Barchart);
}


JKQTPBarGraphBase::JKQTPBarGraphBase(JKQTPlotter* parent):
    JKQTPBarGraphBase(parent->getPlotter())
{
}

void JKQTPBarGraphBase::drawKeyMarker(JKQTPEnhancedPainter& painter, QRectF& rect) {
    painter.save(); auto __finalpaint=JKQTPFinally([&painter]() {painter.restore();});
    QPen p=getLinePenForRects(painter, parent);
    QPen np(Qt::NoPen);
    QBrush b=getFillBrush(painter, parent);
    //int y=rect.top()+rect.height()/2.0;
    painter.setPen(p);
    painter.setBrush(b);
    painter.drawRect(rect);

}

QColor JKQTPBarGraphBase::getKeyLabelColor() const {
    return getFillColor();
}


void JKQTPBarGraphBase::autoscaleBarWidthAndShift(double maxWidth, double shrinkFactor)
{
    if (parent) {
        double cntH=0;
        for (size_t i=0; i<parent->getGraphCount(); i++) {
            JKQTPPlotElement* g=parent->getGraph(i);
            JKQTPBarGraphBase* gb=qobject_cast<JKQTPBarGraphBase*>(g);
            if (gb && considerForAutoscaling(gb)) {
                cntH++;
            }

        }

        double widthH=1.0/cntH*maxWidth*shrinkFactor;
        double dH=maxWidth/(cntH);
        double h=0.1+dH/2.0;
        for (size_t i=0; i<parent->getGraphCount(); i++) {
            JKQTPPlotElement* g=parent->getGraph(i);
            JKQTPBarGraphBase* gb=qobject_cast<JKQTPBarGraphBase*>(g);
            if (gb && considerForAutoscaling(gb)) {
                if (cntH>1) {
                    gb->width=widthH;
                    gb->shift=h-0.5;
                    h=h+dH;
                } else {
                    gb->width=maxWidth;
                    gb->shift=0.0;
                }
            }

        }
    }
}

void JKQTPBarGraphBase::autoscaleBarWidthAndShiftSeparatedGroups(double groupWidth) {
    autoscaleBarWidthAndShift(groupWidth, 1);
}



void JKQTPBarGraphBase::setColor(QColor c)
{
    setLineColor(c);
    setFillColor(JKQTPGetDerivedColor(parent->getCurrentPlotterStyle().graphsStyle.barchartStyle.fillColorDerivationMode, c));
    c.setAlphaF(0.5);
    setHighlightingLineColor(c);
}

void JKQTPBarGraphBase::setShift(double __value)
{
    this->shift = __value;
}

double JKQTPBarGraphBase::getShift() const
{
    return this->shift;
}

void JKQTPBarGraphBase::setWidth(double __value)
{
    this->width = __value;
}

double JKQTPBarGraphBase::getWidth() const
{
    return this->width;
}

void JKQTPBarGraphBase::setFillColor_and_darkenedColor(QColor fill, int colorDarker)
{
    setFillColor(fill);
    setLineColor(fill.darker(colorDarker));
}

double JKQTPBarGraphBase::getParentStackedMax(int /*index*/) const
{
    return getBaseline();
}

bool JKQTPBarGraphBase::hasStackParent() const
{
    return false;
}

bool JKQTPBarGraphBase::getValuesMinMax(double &mmin, double &mmax, double &smallestGreaterZero)
{
    mmin=0;
    mmax=0;
    smallestGreaterZero=0;
    if (getBaseline()>0) {
        smallestGreaterZero=getBaseline();
        mmin=getBaseline();
        mmax=getBaseline();
    }

    if (getBarPositionColumn()<0 || getBarHeightColumn()<0) return false;

    const size_t datacol=static_cast<size_t>(getBarHeightColumn());

    if (parent==nullptr) return false;

    const JKQTPDatastore* datastore=parent->getDatastore();
    int imin=0, imax=0;
    if (getIndexRange(imin, imax)) {


        for (int i=imin; i<imax; i++) {
            double stack=0;
            double yv=getBaseline();
            const double boxstart=getParentStackedMax(i);
            if (hasStackParent()) {
                stack=boxstart;
                yv=stack;
            }
            if (JKQTPIsOKFloat(yv)) {
                if (yv>mmax) mmax=yv;
                if (yv<mmin) mmin=yv;
                double xvsgz;
                xvsgz=yv; SmallestGreaterZeroCompare_xvsgz();
            }
            yv=stack+datastore->get(datacol,static_cast<size_t>(i));
            if (JKQTPIsOKFloat(yv)) {
                if (yv>mmax) mmax=yv;
                if (yv<mmin) mmin=yv;
                double xvsgz;
                xvsgz=yv; SmallestGreaterZeroCompare_xvsgz();
            }
        }
        return true;
    }
    return false;
}

bool JKQTPBarGraphBase::getPositionsMinMax(double &mmin, double &mmax, double &smallestGreaterZero)
{
    bool start=true;
    mmin=0;
    mmax=0;
    smallestGreaterZero=0;

    if (getBarPositionColumn()<0 || getBarHeightColumn()<0) return false;

    const size_t poscol=static_cast<size_t>(getBarPositionColumn());

    if (parent==nullptr) return false;

    const JKQTPDatastore* datastore=parent->getDatastore();
    int imin=0, imax=0;
    if (getIndexRange(imin, imax)) {
        for (int i=imin; i<imax; i++) {
            double xv=datastore->get(poscol,static_cast<size_t>(i));
            int sr=datastore->getNextLowerIndex(poscol, i);
            int lr=datastore->getNextHigherIndex(poscol, i);
            double delta, deltap, deltam;

            if (sr<0 && lr<0) { // only one x-value
                deltam=0.5;
                deltap=0.5;
            } else if (lr<0) { // the right-most x-value
                deltap=deltam=fabs(xv-datastore->get(poscol,sr))/2.0;
            } else if (sr<0) { // the left-most x-value
                deltam=deltap=fabs(datastore->get(poscol,lr)-xv)/2.0;
            } else {
                deltam=fabs(xv-datastore->get(poscol,sr))/2.0;
                deltap=fabs(datastore->get(poscol,lr)-xv)/2.0;
            }
            delta=deltap+deltam;

            if (JKQTPIsOKFloat(xv) && JKQTPIsOKFloat(delta) ) {

                if (start || xv+shift*delta+width*delta/2.0>mmax) mmax=xv+shift*delta+width*delta/2.0;
                if (start || xv+shift*delta-width*delta/2.0<mmin) mmin=xv+shift*delta-width*delta/2.0;
                double xvsgz;
                xvsgz=xv+shift*delta+width*delta/2.0; SmallestGreaterZeroCompare_xvsgz();
                xvsgz=xv+shift*delta-width*delta/2.0; SmallestGreaterZeroCompare_xvsgz();
                start=false;
            }
        }
        return !start;
    }
    return false;
}