/*****************************************************************************************
 *                                                                                       *
 * OpenSpace                                                                             *
 *                                                                                       *
 * Copyright (c) 2014-2025                                                               *
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 * or substantial portions of the Software.                                              *
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 ****************************************************************************************/

#ifndef __OPENSPACE_MODULE_SPACECRAFTINSTRUMENTS___RENDERABLEPLANETPROJECTION___H__
#define __OPENSPACE_MODULE_SPACECRAFTINSTRUMENTS___RENDERABLEPLANETPROJECTION___H__

#include <openspace/rendering/renderable.h>

#include <modules/spacecraftinstruments/util/projectioncomponent.h>
#include <openspace/properties/misc/optionproperty.h>
#include <openspace/properties/misc/stringproperty.h>
#include <openspace/properties/misc/triggerproperty.h>
#include <openspace/properties/vector/vec3property.h>
#include <ghoul/opengl/uniformcache.h>

namespace openspace {

namespace documentation { struct Documentation; }

struct Image;
class Sphere;

namespace planetgeometry { class PlanetGeometry; }

class RenderablePlanetProjection : public Renderable {
public:
    explicit RenderablePlanetProjection(const ghoul::Dictionary& dict);
    ~RenderablePlanetProjection() override;

    void initializeGL() override;
    void deinitializeGL() override;
    bool isReady() const override;

    void render(const RenderData& data, RendererTasks& rendererTask) override;
    void update(const UpdateData& data) override;
    ghoul::opengl::Texture& baseTexture() const;

    static documentation::Documentation Documentation();

private:
    void loadColorTexture();
    void loadHeightTexture();
    void createSphere();

    glm::mat4 attitudeParameters(double time, const glm::vec3& up);
    void imageProjectGPU(const ghoul::opengl::Texture& projectionTexture,
        const glm::mat4& projectorMatrix);

    ProjectionComponent _projectionComponent;

    properties::OptionProperty _colorTexturePaths;
    properties::StringProperty _addColorTexturePath;
    bool _colorTextureDirty = false;

    properties::OptionProperty _heightMapTexturePaths;
    properties::StringProperty _addHeightMapTexturePath;
    bool _heightMapTextureDirty = false;

    ghoul::opengl::ProgramObject* _programObject = nullptr;
    ghoul::opengl::ProgramObject* _fboProgramObject = nullptr;
    UniformCache(sun_pos, modelTransform, modelViewProjectionTransform, hasBaseMap,
        hasHeightMap, heightExaggeration, meridianShift, ambientBrightness,
        projectionFading, baseTexture, projectionTexture,
        heightTexture) _mainUniformCache;

    UniformCache(projectionTexture, ProjectorMatrix, ModelTransform, boresight,
        radius, segments) _fboUniformCache;

    std::unique_ptr<ghoul::opengl::Texture> _baseTexture;
    std::unique_ptr<ghoul::opengl::Texture> _heightMapTexture;

    properties::FloatProperty _heightExaggeration;
    properties::BoolProperty _meridianShift;
    properties::FloatProperty _ambientBrightness;
    properties::IntProperty _maxProjectionsPerFrame;
    properties::IntProperty _projectionsInBuffer;
    properties::TriggerProperty _clearProjectionBuffer;

    properties::Vec3Property _radius;
    properties::IntProperty _segments;
    std::unique_ptr<Sphere> _sphere;

    glm::mat4 _transform = glm::mat4(1.f);
    glm::mat4 _projectorMatrix = glm::mat4(1.f);
    glm::vec3 _boresight = glm::vec3(0.f);

    std::vector<Image> _imageTimes;

    GLuint _quad = 0;
    GLuint _vertexPositionBuffer = 0;
};

}  // namespace openspace

#endif // __OPENSPACE_MODULE_SPACECRAFTINSTRUMENTS___RENDERABLEPLANETPROJECTION___H__