#pragma once

#include <osg/Camera>
#include <osg/Geode>
#include <osg/PositionAttitudeTransform>

#include <osgText/Text>
#include <osgText/Font>

class TextHUD : public osg::Referenced {
private:
    osg::ref_ptr< osg::Camera > _camera;
    osg::ref_ptr< osgText::Text > _modeText;
    osg::ref_ptr< osgText::Text > _cameraModeText;

public:
    TextHUD(void) {
        _camera = createCamera();
        _camera->addChild(createText());
    }

    osg::Camera* createCamera(void) {
        osg::Camera* camera = new osg::Camera;

        camera->setViewport(0, 0, 1024, 768);
        camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
        camera->setProjectionMatrixAsOrtho2D(0, 1024, 0, 768);
        camera->setRenderOrder(osg::Camera::POST_RENDER);
        camera->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
        camera->setClearMask(GL_DEPTH_BUFFER_BIT);

        return camera;
    }

    osg::Node* createText(void) {
        osg::Geode* textGeode = new osg::Geode;

        osgText::Text* title = new osgText::Text;
        title->setFont("fonts/arial.ttf");
        title->setCharacterSize(14);
        title->setLineSpacing(0.4f);

        std::string versionText =
            std::string("osgOcean ") +
            std::string(osgOceanGetVersion()) +
            std::string("\nPress 'h' for options");

        title->setText(versionText);
        textGeode->addDrawable(title);

        _modeText = new osgText::Text;
        _modeText->setFont("fonts/arial.ttf");
        _modeText->setCharacterSize(14);
        _modeText->setPosition(osg::Vec3f(0.f, -40.f, 0.f));
        _modeText->setDataVariance(osg::Object::DYNAMIC);
        textGeode->addDrawable(_modeText.get());

        _cameraModeText = new osgText::Text;
        _cameraModeText->setFont("fonts/arial.ttf");
        _cameraModeText->setCharacterSize(14);
        _cameraModeText->setPosition(osg::Vec3f(0.f, -60.f, 0.f));
        _cameraModeText->setDataVariance(osg::Object::DYNAMIC);
        textGeode->addDrawable(_cameraModeText.get());

        osg::PositionAttitudeTransform* titlePAT = new osg::PositionAttitudeTransform;
        titlePAT->setPosition(osg::Vec3f(10, 70, 0.f));
        titlePAT->addChild(textGeode);

        return titlePAT;
    }

    void setSceneText(const std::string& preset) {
        _modeText->setText("Preset: " + preset);
    }

    void setCameraText(const std::string& mode) {
        _cameraModeText->setText("Camera: " + mode);
    }

    osg::Camera* getHudCamera(void) {
        return _camera.get();
    }
};