/*
    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 2.1 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/jkqtpgraphsparsedfunction.h"
#include "jkqtplotter/jkqtpgraphsscatter.h"
#include "jkqtplotter/jkqtpbaseplotter.h"
#include "jkqtplotter/jkqtplotter.h"
#include "jkqtplottertools/jkqtptools.h"
#include <stdlib.h>
#include <QDebug>
#include <QElapsedTimer>
#include <utility>


JKQTPXParsedFunctionLineGraph::JKQTPXParsedFunctionLineGraph(JKQTBasePlotter *parent):
    JKQTPXFunctionLineGraph(parent)
{
    fdata.parser=new JKQTPMathParser();
    fdata.node=nullptr;
    fdata.varcount=0;
    function="";
    parameterColumn=-1;
    setPlotFunctionFunctor(jkqtpPlotFunctionType(std::bind(&JKQTPXParsedFunctionLineGraph::JKQTPXParsedFunctionLineGraphFunction, std::placeholders::_1, std::placeholders::_2, &fdata)));

    efdata.parser=new JKQTPMathParser();
    efdata.node=nullptr;
    efdata.varcount=0;
    errorFunction="";
    errorParameterColumn=-1;
    setErrorPlotFunction(jkqtpPlotFunctionType(std::bind(&JKQTPXParsedFunctionLineGraph::JKQTPXParsedFunctionLineGraphFunction, std::placeholders::_1, std::placeholders::_2, &efdata)));
}

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

JKQTPXParsedFunctionLineGraph::~JKQTPXParsedFunctionLineGraph()
{
    if (fdata.node) delete fdata.node;
    delete fdata.parser;
    if (efdata.node) delete efdata.node;
    delete efdata.parser;
}

void JKQTPXParsedFunctionLineGraph::setFunction(const QString &__value)
{
    this->function = __value;
}

QString JKQTPXParsedFunctionLineGraph::getFunction() const
{
    return this->function;
}

void JKQTPXParsedFunctionLineGraph::setErrorFunction(const QString &__value)
{
    this->errorFunction = __value;
}

QString JKQTPXParsedFunctionLineGraph::getErrorFunction() const
{
    return this->errorFunction;
}


void JKQTPXParsedFunctionLineGraph::createPlotData(bool /*collectParams*/)
{
    collectParameters();

    //QElapsedTimer timer;
    //timer.start();
    for (int i=0; i<fdata.varcount; i++) {
        fdata.parser->deleteVariable(std::string("p")+jkqtp_inttostr(i+1));
    }
    fdata.varcount=0;
    try {
        QVector<double>* parameters=static_cast<QVector<double>*>(params);
        if (parameters) {
            for (int i=0; i<parameters->size(); i++) {
                fdata.parser->addVariableDouble(std::string("p")+jkqtp_inttostr(fdata.varcount+1), parameters->at(i));
                fdata.varcount=fdata.varcount+1;
            }
        }
        fdata.parser->addVariableDouble(std::string("x"), 0.0);
        if (fdata.node) delete fdata.node;
        //qint64 t=timer.elapsed();


        //qDebug()<<"createPlotData():   adding variables: "<<t<<"ms";
        fdata.node=fdata.parser->parse(function.toStdString());
        //qDebug()<<"createPlotData():   parsing: "<<timer.elapsed()-t<<"ms";
    } catch(std::exception& E) {
        qDebug()<<QString("parser error: %1").arg(E.what());
    }

    //qint64 t0=timer.elapsed();
    for (int i=0; i<efdata.varcount; i++) {
        efdata.parser->deleteVariable(std::string("p")+jkqtp_inttostr(i+1));
    }
    efdata.varcount=0;
    try {
        QVector<double>* errorParameters=static_cast<QVector<double>*>(errorParams);
        if (errorParameters) {
            for (int i=0; i<errorParameters->size(); i++) {
                efdata.parser->addVariableDouble(std::string("p")+jkqtp_inttostr(efdata.varcount+1), errorParameters->at(i));
                efdata.varcount=efdata.varcount+1;
            }
        }
        efdata.parser->addVariableDouble(std::string("x"), 0.0);
        if (efdata.node) delete efdata.node;
        //qint64 t=timer.elapsed();
        //qDebug()<<"createPlotData():   adding variables: "<<t-t0<<"ms";
        efdata.node=efdata.parser->parse(errorFunction.toStdString());
        //qDebug()<<"createPlotData():   parsing: "<<timer.elapsed()-t<<"ms";
    } catch(std::exception& /*E*/) {
        //qDebug()<<QString("parser error: %1").arg(E.what());
    }

    setPlotFunctionFunctor(jkqtpPlotFunctionType(std::bind(&JKQTPXParsedFunctionLineGraph::JKQTPXParsedFunctionLineGraphFunction, std::placeholders::_1, std::placeholders::_2, &fdata)));
    setErrorPlotFunction(jkqtpPlotFunctionType(std::bind(&JKQTPXParsedFunctionLineGraph::JKQTPXParsedFunctionLineGraphFunction, std::placeholders::_1, std::placeholders::_2, &efdata)));

    //qint64 t=timer.elapsed();
    JKQTPXFunctionLineGraph::createPlotData(false);
    //qDebug()<<"createPlotData():   JKQTPXFunctionLineGraph::createPlotData():   "<<timer.elapsed()-t<<"ms";

    /*int count=0;
    doublePair* d=data;
    while (d!=nullptr) {
        count++;
        d=d->next;
    }
    qDebug()<<"refined to "<<count<<" daatapoints";*/
}


double JKQTPXParsedFunctionLineGraph::JKQTPXParsedFunctionLineGraphFunction(double x, void* /*data*/, JKQTPXParsedFunctionLineGraphFunctionData *fdata) {
    JKQTPXParsedFunctionLineGraph::JKQTPXParsedFunctionLineGraphFunctionData* d=fdata;//static_cast<JKQTPXParsedFunctionLineGraph::JKQTPXParsedFunctionLineGraphFunctionData*>(data);
    if (d && d->parser && d->node) {
        try {
            d->parser->addVariableDouble("x", x);
            JKQTPMathParser::jkmpResult r=d->node->evaluate();

            if (r.isValid) {
                if (r.type==JKQTPMathParser::jkmpBool) {
                    return r.boolean?1.0:0.0;
                } else if (r.type==JKQTPMathParser::jkmpDouble) {
                    return r.num;
                }
            }
        } catch(std::exception& E) {
           qDebug()<<QString("parser error: %1").arg(E.what());
           /*ok= QMessageBox::critical(this, tr("QuickFit-table"),
                                     tr("An error occured while parsing the expression '%1' in cell (row, column)=(%3, %4):\n%2\n\n\"OK\" will still go on evaluating\n\"Cancel\" will cancel evaluation for the rest of the cells.").arg(dlgMathExpression->getExpression()).arg(E.what()).arg(row).arg(column),
                                        QMessageBox::Ok|QMessageBox::Cancel, QMessageBox::Ok)==QMessageBox::Ok;*/

        }
    }
    return NAN;

}

















JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraph(JKQTBasePlotter *parent):
    JKQTPYFunctionLineGraph(parent)
{
    fdata.parser=new JKQTPMathParser();
    fdata.node=nullptr;
    fdata.varcount=0;
    function="";
    parameterColumn=-1;
    setPlotFunctionFunctor(jkqtpPlotFunctionType(std::bind(&JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraphFunction, std::placeholders::_1, std::placeholders::_2, &fdata)));

    efdata.parser=new JKQTPMathParser();
    efdata.node=nullptr;
    efdata.varcount=0;
    errorFunction="";
    errorParameterColumn=-1;
    setErrorPlotFunction(jkqtpPlotFunctionType(std::bind(&JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraphFunction, std::placeholders::_1, std::placeholders::_2, &efdata)));
}

JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraph(JKQTPlotter *parent):
    JKQTPYFunctionLineGraph(parent)
{
    fdata.parser=new JKQTPMathParser();
    fdata.node=nullptr;
    fdata.varcount=0;
    function="";
    parameterColumn=-1;
    setPlotFunctionFunctor(jkqtpPlotFunctionType(std::bind(&JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraphFunction, std::placeholders::_1, std::placeholders::_2, &fdata)));

    efdata.parser=new JKQTPMathParser();
    efdata.node=nullptr;
    efdata.varcount=0;
    errorFunction="";
    errorParameterColumn=-1;
    setErrorPlotFunction(jkqtpPlotFunctionType(std::bind(&JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraphFunction, std::placeholders::_1, std::placeholders::_2, &efdata)));
}

JKQTPYParsedFunctionLineGraph::~JKQTPYParsedFunctionLineGraph()
{
    if (fdata.node) delete fdata.node;
    delete fdata.parser;
    if (efdata.node) delete efdata.node;
    delete efdata.parser;
}

void JKQTPYParsedFunctionLineGraph::setFunction(const QString &__value)
{
    this->function = __value;
}

QString JKQTPYParsedFunctionLineGraph::getFunction() const
{
    return this->function;
}

void JKQTPYParsedFunctionLineGraph::setErrorFunction(const QString &__value)
{
    this->errorFunction = __value;
}

QString JKQTPYParsedFunctionLineGraph::getErrorFunction() const
{
    return this->errorFunction;
}

void JKQTPYParsedFunctionLineGraph::createPlotData(bool /*collectParams*/)
{
    collectParameters();

    //QElapsedTimer timer;
    //timer.start();
    for (int i=0; i<fdata.varcount; i++) {
        fdata.parser->deleteVariable(std::string("p")+jkqtp_inttostr(i+1));
    }
    fdata.varcount=0;
    try {
        QVector<double>* parameters=static_cast<QVector<double>*>(params);
        if (parameters) {
            for (int i=0; i<parameters->size(); i++) {
                fdata.parser->addVariableDouble(std::string("p")+jkqtp_inttostr(fdata.varcount+1), parameters->at(i));
                fdata.varcount=fdata.varcount+1;
            }
        }
        fdata.parser->addVariableDouble(std::string("x"), 0.0);
        fdata.parser->addVariableDouble(std::string("y"), 0.0);
        if (fdata.node) delete fdata.node;
        //qint64 t=timer.elapsed();


        //qDebug()<<"createPlotData():   adding variables: "<<t<<"ms";
        fdata.node=fdata.parser->parse(function.toStdString());
        //qDebug()<<"createPlotData():   parsing: "<<timer.elapsed()-t<<"ms";
    } catch(std::exception& E) {
        qDebug()<<QString("parser error: %1").arg(E.what());
    }

    //qint64 t0=timer.elapsed();
    for (int i=0; i<efdata.varcount; i++) {
        efdata.parser->deleteVariable(std::string("p")+jkqtp_inttostr(i+1));
    }
    efdata.varcount=0;
    try {
        QVector<double>* errorParameters=static_cast<QVector<double>*>(errorParams);
        if (errorParameters) {
            for (int i=0; i<errorParameters->size(); i++) {
                efdata.parser->addVariableDouble(std::string("p")+jkqtp_inttostr(efdata.varcount+1), errorParameters->at(i));
                efdata.varcount=efdata.varcount+1;
            }
        }
        efdata.parser->addVariableDouble(std::string("x"), 0.0);
        efdata.parser->addVariableDouble(std::string("y"), 0.0);
        if (efdata.node) delete efdata.node;
        //qint64 t=timer.elapsed();
        //qDebug()<<"createPlotData():   adding variables: "<<t-t0<<"ms";
        efdata.node=efdata.parser->parse(errorFunction.toStdString());
        //qDebug()<<"createPlotData():   parsing: "<<timer.elapsed()-t<<"ms";
    } catch(std::exception& E) {
        qDebug()<<QString("parser error: %1").arg(E.what());
    }

    setPlotFunctionFunctor(jkqtpPlotFunctionType(std::bind(&JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraphFunction, std::placeholders::_1, std::placeholders::_2, &fdata)));
    setErrorPlotFunction(jkqtpPlotFunctionType(std::bind(&JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraphFunction, std::placeholders::_1, std::placeholders::_2, &efdata)));

    //qint64 t=timer.elapsed();
    JKQTPYFunctionLineGraph::createPlotData(false);
    //qDebug()<<"createPlotData():   JKQTPYFunctionLineGraph::createPlotData():   "<<timer.elapsed()-t<<"ms";

    /*int count=0;
    doublePair* d=data;
    while (d!=nullptr) {
        count++;
        d=d->next;
    }
    qDebug()<<"refined to "<<count<<" daatapoints";*/
}

double JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraphFunction(double x, void* /*data*/, JKQTPYParsedFunctionLineGraphFunctionData *fdata) {
    JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraphFunctionData* d=fdata;//static_cast<JKQTPYParsedFunctionLineGraph::JKQTPYParsedFunctionLineGraphFunctionData*>(data);
    if (d && d->parser && d->node) {
        try {
            d->parser->addVariableDouble("x", x);
            d->parser->addVariableDouble("y", x);
            JKQTPMathParser::jkmpResult r=d->node->evaluate();

            if (r.isValid) {
                if (r.type==JKQTPMathParser::jkmpBool) {
                    return r.boolean?1.0:0.0;
                } else if (r.type==JKQTPMathParser::jkmpDouble) {
                    return r.num;
                }
            }
        } catch(std::exception& /*E*/) {
            //qDebug()<<QString("parser error: %1").arg(E.what());
           /*ok= QMessageBox::critical(this, tr("QuickFit-table"),
                                     tr("An error occured while parsing the expression '%1' in cell (row, column)=(%3, %4):\n%2\n\n\"OK\" will still go on evaluating\n\"Cancel\" will cancel evaluation for the rest of the cells.").arg(dlgMathExpression->getExpression()).arg(E.what()).arg(row).arg(column),
                                        QMessageBox::Ok|QMessageBox::Cancel, QMessageBox::Ok)==QMessageBox::Ok;*/

        }
    }
    return NAN;

}