/* -*- C++ -*-
 *
 *  This file is part of RawTherapee.
 *
 *  Copyright (c) 2017 Alberto Griggio <alberto.griggio@gmail.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 <http://www.gnu.org/licenses/>.
 */

#pragma once

#include <memory>
#include <vector>

#if (BUNDLED_LENSFUN == 1)
#include <lensfun/lensfun.h>
#else
#include <lensfun.h>
#endif

#include <glibmm.h>

//#include "lcp.h"
#include "noncopyable.h"
#include "procparams.h"

namespace rtengine {


class LensCorrection {
public:
    virtual ~LensCorrection() {}
    virtual void correctDistortion(double &x, double &y, int cx, int cy, double scale) const = 0;
    virtual bool isCACorrectionAvailable() const = 0;
    virtual void correctCA(double &x, double &y, int cx, int cy, int channel) const = 0;
    virtual void processVignetteLine(int width, int y, float *line) const = 0;
    virtual void processVignetteLine3Channels(int width, int y, float *line) const = 0;
};


class LFModifier final :
    public LensCorrection,
    public NonCopyable
{
public:
    ~LFModifier();

    explicit operator bool() const;

    void correctDistortion(double &x, double &y, int cx, int cy, double scale) const override;
    bool isCACorrectionAvailable() const override;
    void correctCA(double &x, double &y, int cx, int cy, int channel) const override;
    void processVignetteLine(int width, int y, float *line) const override;
    void processVignetteLine3Channels(int width, int y, float *line) const override;

    Glib::ustring getDisplayString() const;

private:
    LFModifier(lfModifier *m, bool swap_xy, int flags);

    friend class LFDatabase;
    lfModifier *data_;
    bool swap_xy_;
    int flags_;
};

class LFCamera final
{
public:
    LFCamera();

    explicit operator bool() const;

    Glib::ustring getMake() const;
    Glib::ustring getModel() const;
    float getCropFactor() const;
    bool isFixedLens() const;

    Glib::ustring getDisplayString() const;

//private:
    friend class LFDatabase;
    const lfCamera *data_;
};

class LFLens final
{
public:
    LFLens();

    explicit operator bool() const;

    Glib::ustring getMake() const;
    Glib::ustring getLens() const;
    Glib::ustring getDisplayString() const { return getLens(); }
    float getCropFactor() const;
    bool hasVignettingCorrection() const;
    bool hasDistortionCorrection() const;
    bool hasCACorrection() const;

//private:
    friend class LFDatabase;
    const lfLens *data_;
};

class LFDatabase final :
    public NonCopyable
{
public:
    static bool init(const Glib::ustring &dbdir);
    static const LFDatabase *getInstance();

    ~LFDatabase();

    std::vector<LFCamera> getCameras() const;
    std::vector<LFLens> getLenses() const;
    LFCamera findCamera(const Glib::ustring &make, const Glib::ustring &model) const;
    LFLens findLens(const LFCamera &camera, const Glib::ustring &name, bool relax=false) const;

private:
    std::unique_ptr<LFModifier> getModifier(const LFCamera &camera, const LFLens &lens,
                                            float focalLen, float aperture, float focusDist,
                                            int width, int height, bool swap_xy) const;
    LFDatabase();
    bool LoadDirectory(const char *dirname);

    static LFDatabase instance_;
    lfDatabase *data_;
};

} // namespace rtengine
