////////////////////////////////////////////////////////////////////////////////////////////////////
// NoesisGUI - http://www.noesisengine.com
// Copyright (c) 2013 Noesis Technologies S.L. All Rights Reserved.
////////////////////////////////////////////////////////////////////////////////////////////////////


// This is a minimal integration example. For simplification purposes only basic input events are
// handled, no resource providers are used and the shutdown procedure is omitted. A more complete
// multiplatform integration sample with step by step comments can be found at 'Samples/Integration'


#ifdef _WIN32
#include "glut.h"
#pragma comment(linker,"/SUBSYSTEM:CONSOLE")
#endif

#ifdef __APPLE__
#include <GLUT/glut.h>
#endif

#ifdef __EMSCRIPTEN__
#include <GL/glut.h>
#include <GLES3/gl32.h>
#include <emscripten/html5.h>
#endif

#ifdef __linux__
#define GL_GLEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glut.h>
#endif

#ifdef _MSC_VER
#define UNUSED_ARGS(...) (void)(true ? (void)0 : ((void)(__VA_ARGS__)))
#else
#define UNUSED_ARGS(...)
#endif


#include <NsApp/ThemeProviders.h>
#include <NsRender/GLFactory.h>
#include <NsGui/FontProperties.h>
#include <NsGui/IntegrationAPI.h>
#include <NsGui/IRenderer.h>
#include <NsGui/IView.h>
#include <NsGui/Grid.h>
#include <NsApp/EmbeddedXamlProvider.h>

const uint8_t AppGlut_xaml[] =
{
    60,71,114,105,100,13,10,32,32,120,109,108,110,115,61,34,104,116,116,112,58,47,47,115,99,104,101,
    109,97,115,46,109,105,99,114,111,115,111,102,116,46,99,111,109,47,119,105,110,102,120,47,50,48,48,
    54,47,120,97,109,108,47,112,114,101,115,101,110,116,97,116,105,111,110,34,13,10,32,32,120,109,108,
    110,115,58,120,61,34,104,116,116,112,58,47,47,115,99,104,101,109,97,115,46,109,105,99,114,111,115,
    111,102,116,46,99,111,109,47,119,105,110,102,120,47,50,48,48,54,47,120,97,109,108,34,13,10,32,32,
    120,109,108,110,115,58,101,105,61,34,104,116,116,112,58,47,47,115,99,104,101,109,97,115,46,109,105,
    99,114,111,115,111,102,116,46,99,111,109,47,101,120,112,114,101,115,115,105,111,110,47,50,48,49,48,
    47,105,110,116,101,114,97,99,116,105,111,110,115,34,13,10,32,32,120,109,108,110,115,58,105,61,34,
    104,116,116,112,58,47,47,115,99,104,101,109,97,115,46,109,105,99,114,111,115,111,102,116,46,99,111,
    109,47,101,120,112,114,101,115,115,105,111,110,47,50,48,49,48,47,105,110,116,101,114,97,99,116,105,
    118,105,116,121,34,13,10,32,32,120,109,108,110,115,58,110,111,101,115,105,115,61,34,99,108,114,45,
    110,97,109,101,115,112,97,99,101,58,78,111,101,115,105,115,71,85,73,69,120,116,101,110,115,105,111,
    110,115,59,97,115,115,101,109,98,108,121,61,78,111,101,115,105,115,46,71,85,73,46,69,120,116,101,
    110,115,105,111,110,115,34,62,13,10,32,32,13,10,32,32,32,32,60,67,97,110,118,97,115,32,120,58,78,
    97,109,101,61,34,84,101,120,116,84,111,111,108,67,97,110,118,97,115,34,62,13,10,32,32,32,32,32,32,
    32,60,86,105,101,119,98,111,120,32,83,116,114,101,116,99,104,61,34,85,110,105,102,111,114,109,34,
    32,83,116,114,101,116,99,104,68,105,114,101,99,116,105,111,110,61,34,66,111,116,104,34,32,67,97,
    110,118,97,115,46,76,101,102,116,61,34,50,48,48,34,32,67,97,110,118,97,115,46,84,111,112,61,34,50,
    48,48,34,62,13,10,32,32,32,32,32,32,32,32,32,32,32,32,60,82,101,99,116,97,110,103,108,101,32,79,
    112,97,99,105,116,121,61,34,48,46,56,34,32,87,105,100,116,104,61,34,49,48,48,48,34,32,72,101,105,
    103,104,116,61,34,50,48,48,48,34,32,70,105,108,108,61,34,82,101,100,34,62,13,10,32,32,32,32,32,32,
    32,32,32,32,32,32,32,32,32,32,32,32,32,32,60,105,58,73,110,116,101,114,97,99,116,105,111,110,46,66,
    101,104,97,118,105,111,114,115,62,13,10,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,32,
    32,32,32,32,32,60,101,105,58,77,111,117,115,101,68,114,97,103,69,108,101,109,101,110,116,66,101,
    104,97,118,105,111,114,32,67,111,110,115,116,114,97,105,110,84,111,80,97,114,101,110,116,66,111,
    117,110,100,115,61,34,70,97,108,115,101,34,32,47,62,13,10,32,32,32,32,32,32,32,32,32,32,32,32,32,
    32,32,32,32,32,32,32,60,47,105,58,73,110,116,101,114,97,99,116,105,111,110,46,66,101,104,97,118,
    105,111,114,115,62,13,10,32,32,32,32,32,32,32,32,32,32,32,32,60,47,82,101,99,116,97,110,103,108,
    101,62,13,10,32,32,32,32,32,32,32,32,60,47,86,105,101,119,98,111,120,62,13,10,13,10,32,32,32,32,60,
    47,67,97,110,118,97,115,62,13,10,32,32,13,10,60,47,71,114,105,100,62
};




#include <NsApp/Launcher.h>

static Noesis::IView* _view;

///////////////////////////////////////////////////////////////////////////////////////////////////
static void NoesisInit()
{
    // A logging handler is installed here. You can also install a custom error handler and memory
    // allocator. By default errors are redirected to the logging handler
    Noesis::GUI::SetLogHandler([](const char*, uint32_t, uint32_t level, const char*, const char* msg)
    {
        // [TRACE] [DEBUG] [INFO] [WARNING] [ERROR]
        const char* prefixes[] = { "T", "D", "I", "W", "E" };
        printf("[NOESIS/%s] %s\n", prefixes[level], msg);
    });

    NoesisApp::Launcher::RegisterAppComponents();

    // https://www.noesisengine.com/docs/Gui.Core.Licensing.html
    Noesis::GUI::SetLicense(NS_LICENSE_NAME, NS_LICENSE_KEY);

    // Noesis initialization. This must be the first step before using any NoesisGUI functionality
    Noesis::GUI::Init();

    NoesisApp::EmbeddedXaml xamls[] = { { "AppGlut.xaml", AppGlut_xaml } };
    Noesis::Ptr<Noesis::XamlProvider> xamlProvider = *new NoesisApp::EmbeddedXamlProvider(xamls);

    // Setup theme
    NoesisApp::SetThemeProviders(xamlProvider);
    Noesis::GUI::LoadApplicationResources("Theme/NoesisTheme.DarkBlue.xaml");

                    
    // <Button Content="Hello World!" Margin="0,30,0,0"/>

    // For simplicity purposes we are not using resource providers in this sample. ParseXaml() is
    // enough if there is no extra XAML dependencies
    Noesis::Ptr<Noesis::Grid> xaml = Noesis::GUI::LoadXaml<Noesis::Grid>("AppGlut.xaml");
    
    /*(Noesis::GUI::ParseXaml<Noesis::Grid>(R"(
            <Grid
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions"
              xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
              xmlns:noesis="clr-namespace:NoesisGUIExtensions;assembly=Noesis.GUI.Extensions">
  
              <noesis:Element.Transform3D>
                <noesis:CompositeTransform3D RotationY="50" />
              </noesis:Element.Transform3D>
  
                <Canvas x:Name="TextToolCanvas">
                   <Viewbox Stretch="Uniform" StretchDirection="Both" Canvas.Left="200" Canvas.Top="200">
                        <Rectangle Opacity="0.8" Width="100" Height="200" Fill="Red">
                                <i:Interaction.Behaviors>
                                    <ei:MouseDragElementBehavior ConstrainToParentBounds="False" />
                                </i:Interaction.Behaviors>
                        </Rectangle>
                    </Viewbox>

                </Canvas>
  
            </Grid>
    )"));*/

    // View creation to render and interact with the user interface
    // We transfer the ownership to a global pointer instead of a Ptr<> because there is no way
    // in GLUT to do shutdown and we don't want the Ptr<> to be released at global time
    _view = Noesis::GUI::CreateView(xaml).GiveOwnership();
    _view->SetFlags(Noesis::RenderFlags_PPAA | Noesis::RenderFlags_LCD);

    // Renderer initialization with an OpenGL device
    _view->GetRenderer()->Init(NoesisApp::GLFactory::CreateDevice(false));
}

///////////////////////////////////////////////////////////////////////////////////////////////////
static void DisplayFunc(void)
{
    const auto perspective = Noesis::Matrix4::PerspectiveFov(90.0f, float(glutGet(GLUT_WINDOW_WIDTH)) / float(glutGet(GLUT_WINDOW_HEIGHT)), 0.01f);
    const auto viewport = Noesis::Matrix4::Viewport(float(glutGet(GLUT_WINDOW_WIDTH)), float(glutGet(GLUT_WINDOW_HEIGHT)));
    const auto offset = Noesis::Transform3::Trans(0.0f, 0.0f, 10000.0f).ToMatrix4();

    const auto prod = offset * perspective * viewport;

    _view->SetProjectionMatrix(prod);

    // Update view (layout, animations, ...)
    _view->Update(glutGet(GLUT_ELAPSED_TIME) / 1000.0);

    // Offscreen rendering phase populates textures needed by the on-screen rendering
    _view->GetRenderer()->UpdateRenderTree();
    _view->GetRenderer()->RenderOffscreen();

    // If you are going to render here with your own engine you need to restore the GPU state
    // because noesis changes it. In this case only framebuffer and viewport need to be restored
    glBindFramebuffer(GL_FRAMEBUFFER, 0);
    glViewport(0, 0, glutGet(GLUT_WINDOW_WIDTH), glutGet(GLUT_WINDOW_HEIGHT));

    glClearColor(0.0f, 0.0f, 0.25f, 0.0f);
    glClearStencil(0);
    glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // Rendering is done in the active framebuffer
    _view->GetRenderer()->Render();

    glutSwapBuffers();
    glutPostRedisplay();
}

////////////////////////////////////////////////////////////////////////////////////////////////////
static void ReshapeFunc(int width, int height)
{
    _view->SetSize(width, height);
}

////////////////////////////////////////////////////////////////////////////////////////////////////
static void MouseMoveFunc(int x, int y)
{
    _view->MouseMove(x, y);
}

////////////////////////////////////////////////////////////////////////////////////////////////////
static void MouseFunc(int button, int state, int x, int y)
{
    if (button == GLUT_LEFT_BUTTON)
    {
        if (state == GLUT_DOWN)
        {
            _view->MouseButtonDown(x, y, Noesis::MouseButton_Left);
        }
        else
        {
            _view->MouseButtonUp(x, y, Noesis::MouseButton_Left);
        }
    }
}

////////////////////////////////////////////////////////////////////////////////////////////////////
int main(int argc, char **argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_STENCIL);
    glutInitWindowSize(1000, 600);

#ifdef __EMSCRIPTEN__
    double width, height;
    emscripten_get_element_css_size("#canvas", &width, &height);
    emscripten_set_canvas_element_size("#canvas", (uint32_t)width, (uint32_t)height);
    glutInitWindowSize((uint32_t)width, (uint32_t)height);
#endif

    glutCreateWindow("NoesisGUI - GLUT integration");
    NoesisInit();

    glutDisplayFunc(&DisplayFunc);
    glutReshapeFunc(&ReshapeFunc);
    glutPassiveMotionFunc(&MouseMoveFunc);
    glutMouseFunc(&MouseFunc);

    glutMainLoop();
    return 0;
}