/*
 *  This file is part of RawTherapee.
 *
 *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
 *
 *  RawTherapee 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.
 *
 *  RawTherapee 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 RawTherapee.  If not, see <https://www.gnu.org/licenses/>.
 */
#pragma once

#include <gtkmm.h>

#include "editedstate.h"
#include "guiutils.h"
#include "thresholdselector.h"

class ThresholdAdjuster;

/*
 * TODO: Maybe we could just send back the history string instead of the individual values?
 */
class ThresholdAdjusterListener
{

public:
    virtual ~ThresholdAdjusterListener() = default;
    // to be used by listener that has created a ThresholdAdjuster with with single threshold and precision > 0
    virtual void adjusterChanged(ThresholdAdjuster* a, double newBottom, double newTop) = 0;
    // to be used by listener that has created a ThresholdAdjuster with with double threshold and precision > 0
    virtual void adjusterChanged(ThresholdAdjuster* a, double newBottomLeft, double newTopLeft, double newBottomRight, double newTopRight) = 0;
    // to be used by listener that has created a ThresholdAdjuster with with single threshold and precision == 0
    virtual void adjusterChanged(ThresholdAdjuster* a, int newBottom, int newTop) = 0;
    // to be used by listener that has created a ThresholdAdjuster with with double threshold and precision == 0
    virtual void adjusterChanged(ThresholdAdjuster* a, int newBottomLeft, int newTopLeft, int newBottomRight, int newTopRight) = 0;
    virtual void adjusterChanged2(ThresholdAdjuster* a, int newBottomL, int newTopL, int newBottomR, int newTopR) = 0;
};


class ThresholdAdjuster : public Gtk::Box
{

protected:
    Gtk::Box* hbox;
    Gtk::Label* label;
    ThresholdSelector tSelector;
    //MySpinButton* spin;
    Gtk::Button* reset;
    ThresholdAdjusterListener* adjusterListener;
    sigc::connection delayConnection;
    //sigc::connection spinChange;
    sigc::connection selectorChange;
    sigc::connection editedChange;
    double initialDefaultVal[4];    // default value at construction time
    EditedState editedState;
    EditedState defEditedState;
    Gtk::CheckButton* editedCheckBox;
    bool afterReset;
    bool blocked;
    bool addMode;
    bool separatedMode;
    int delay;

    double shapeValue (double a);
    void refreshLabelStyle ();
    void initObject (Glib::ustring label, bool editedcb);
    void sendToListener ();

public:

    // Custom Threshold widget with 2 cursors (Top and Bottom) and a custom curve provided by the instanciator,
    // each cursor having his own range, default value and precision
    ThresholdAdjuster (Glib::ustring label,
                       double minValueBottom, double maxValueBottom, double defBottom, Glib::ustring labelBottom, unsigned int precisionBottom,
                       double minValueTop,    double maxValueTop,    double defTop,    Glib::ustring labelTop,    unsigned int precisionTop,
                       ThresholdCurveProvider* curveProvider, bool editedCheckBox = false);
    // Simple Threshold widget with 2 linked sliders (0->1 or 1->0)
    ThresholdAdjuster (Glib::ustring label, double minValue, double maxValue, double defBottom,
                       double defTop, unsigned int precision, bool startAtOne, bool editedCheckBox = false);
    // Simple Threshold widget with 4 linked sliders by pairs (0->1->0 or 1->0->1)
    ThresholdAdjuster (Glib::ustring label, double minValue, double maxValue, double defBottomLeft,
                       double defTopLeft, double defBottomRight, double defTopRight, unsigned int precision,
                       bool startAtOne, bool editedCheckBox = false);

    ~ThresholdAdjuster () override;
    void setAdjusterListener (ThresholdAdjusterListener* alistener)
    {
        adjusterListener = alistener;
    }

    void setBgCurveProvider (ThresholdCurveProvider* provider);
    ThresholdSelector* getThresholdSelector()
    {
        return &tSelector;
    };

    template <typename T>
    rtengine::procparams::Threshold<T> getValue ()
    {
        return tSelector.getPositions<T>();
    }
    void getValue (double& bottom, double& top);
    void getValue (double& bottomLeft, double& topLeft, double& bottomRight, double& topRight);
    void getValue (int& bottom, int& top);
    void getValue (int& bottomLeft, int& topLeft, int& bottomRight, int& topRight);
    void getValue (Glib::ustring& bottom, Glib::ustring& top);
    void getValue (Glib::ustring& bottomLeft, Glib::ustring& topLeft, Glib::ustring& bottomRight, Glib::ustring& topRight);
    template <class T>
    void setValue (const rtengine::procparams::Threshold<T> &tValues)
    {
        tSelector.setPositions<T>(tValues);
    }
    void setValue (double bottom, double top);
    void setValue (double bottomLeft, double topLeft, double bottomRight, double topRight);
    void setEnabled (bool enabled);
    template <typename T>
    void setDefault (const rtengine::procparams::Threshold<T> &tresh)
    {
        tSelector.setDefaults<T>(tresh);
    }
    void setDefault (double defBottom, double defTop);
    void setDefault (double defBottomLeft, double defTopLeft, double defBottomRight, double defTopRight);
    void setEditedState (EditedState eState);
    EditedState getEditedState ();
    void setDefaultEditedState (EditedState eState);
    void showEditedCB ();
    void block(bool isBlocked)
    {
        blocked = isBlocked;
    }
    void setBgGradient (const std::vector<GradientMilestone> &milestones)
    {
        tSelector.coloredBar.setBgGradient (milestones);
    }
    void setBgColorProvider (ColorProvider *cp, int i)
    {
        tSelector.coloredBar.setColorProvider(cp, i);
    }
    void setUpdatePolicy (eUpdatePolicy policy)
    {
        tSelector.setUpdatePolicy(policy);
    }

    //void spinChanged ();
    void selectorChanged ();
    bool notifyListener ();
    void resetPressed (GdkEventButton* event);
    void editedToggled ();
    Glib::ustring getHistoryString ();
    void set_tooltip_markup(const Glib::ustring& markup);
    // this set_tooltip_text method is to set_tooltip_markup, and text can contain markups
    void set_tooltip_text(const Glib::ustring& text);
};