/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2017     Statoil ASA
//
//  ResInsight 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.
//
//  ResInsight 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 at <http://www.gnu.org/licenses/gpl.html>
//  for more details.
//
/////////////////////////////////////////////////////////////////////////////////

#pragma once

#include "RiaEclipseUnitTools.h"
#include "RigFlowDiagSolverInterface.h"

#include <QPointer>
#include <QWidget>

#include <cmath>
#include <memory>

class RiuDockedQwtPlot;
class RiuPvtPlotUpdater;
class RiuPvtQwtPicker;
class RiuPvtPlotPanel;

class QDockWidget;
class QComboBox;
class QLabel;

class QwtPlot;
class QwtPlotMarker;
class QwtPlotCurve;

// Interface for providing our custom picker with a tracker text
class RiuPvtTrackerTextProvider
{
public:
    virtual QString trackerText() const = 0;
};

//==================================================================================================
//
//
//
//==================================================================================================
class RiuPvtPlotWidget : public QWidget, public RiuPvtTrackerTextProvider
{
    Q_OBJECT

public:
    RiuPvtPlotWidget( RiuPvtPlotPanel* parent );

    void plotCurves( RiaEclipseUnitTools::UnitSystem                          unitSystem,
                     const std::vector<RigFlowDiagSolverInterface::PvtCurve>& curveArr,
                     double                                                   pressure,
                     double                                                   pointMarkerYValue,
                     QString                                                  pointMarkerLabel,
                     QString                                                  plotTitle,
                     QString                                                  yAxisTitle );
    void applyFontSizes( bool replot );

private:
    static void         setPlotDefaults( QwtPlot* plot );
    const QwtPlotCurve* closestCurveSample( const QPoint& cursorPosition, int* closestSampleIndex ) const;
    size_t              indexOfQwtCurve( const QwtPlotCurve* qwtCurve ) const;
    void                updateTrackerPlotMarkerAndLabelFromPicker();
    QString             trackerText() const override;

private slots:
    void slotPickerActivated( bool );
    void slotPickerPointChanged( const QPoint& pt );

private:
    QPointer<RiuDockedQwtPlot> m_qwtPlot;

    std::vector<RigFlowDiagSolverInterface::PvtCurve> m_pvtCurveArr; // Array of source Pvt curves currently being plotted
    std::vector<const QwtPlotCurve*>
        m_qwtCurveArr; // Array of corresponding qwt curves used for mapping to Pvt curve when doing tracking

    QPointer<RiuPvtQwtPicker> m_qwtPicker;
    QString                   m_trackerLabel;
    QwtPlotMarker*            m_trackerPlotMarker;
};

//==================================================================================================
//
//
//
//==================================================================================================
class RiuPvtPlotPanel : public QWidget
{
    Q_OBJECT

public:
    struct CellValues
    {
        double pressure = HUGE_VAL;
        double rs       = HUGE_VAL;
        double rv       = HUGE_VAL;
    };

    struct FvfDynProps
    {
        double bo = HUGE_VAL;
        double bg = HUGE_VAL;
    };

    struct ViscosityDynProps
    {
        double mu_o = HUGE_VAL;
        double mu_g = HUGE_VAL;
    };

public:
    RiuPvtPlotPanel( QDockWidget* parent );
    ~RiuPvtPlotPanel() override;

    void               setPlotData( RiaEclipseUnitTools::UnitSystem                          unitSystem,
                                    const std::vector<RigFlowDiagSolverInterface::PvtCurve>& fvfCurveArr,
                                    const std::vector<RigFlowDiagSolverInterface::PvtCurve>& viscosityCurveArr,
                                    FvfDynProps                                              fvfDynProps,
                                    ViscosityDynProps                                        viscosityDynProps,
                                    CellValues                                               cellValues,
                                    QString                                                  cellReferenceText );
    void               clearPlot();
    RiuPvtPlotUpdater* plotUpdater();
    void               applyFontSizes( bool replot );

private:
    void           plotUiSelectedCurves();
    static QString unitLabelFromCurveIdent( RiaEclipseUnitTools::UnitSystem             unitSystem,
                                            RigFlowDiagSolverInterface::PvtCurve::Ident curveIdent );

private slots:
    void slotPhaseComboCurrentIndexChanged( int );

private:
    RiaEclipseUnitTools::UnitSystem                   m_unitSystem;
    std::vector<RigFlowDiagSolverInterface::PvtCurve> m_allFvfCurvesArr;
    std::vector<RigFlowDiagSolverInterface::PvtCurve> m_allViscosityCurvesArr;
    FvfDynProps                                       m_fvfDynProps;
    ViscosityDynProps                                 m_viscosityDynProps;
    CellValues                                        m_cellValues;
    QString                                           m_cellReferenceText;

    QComboBox* m_phaseComboBox;
    QLabel*    m_titleLabel;

    RiuPvtPlotWidget* m_fvfPlot;
    RiuPvtPlotWidget* m_viscosityPlot;

    std::unique_ptr<RiuPvtPlotUpdater> m_plotUpdater;
};