#include <OpenFrontend2.h>
#include <Frontend2Utils.h>

using namespace Frontend;
using namespace Frontend::Utils;
using namespace Frontend::Utils::Simple;

int main(int argc, char** argv)
{
	// Initialize SimpleSetup
	SimpleSetup setup(GUI::CreateNativeWindowManager(), Graphics::OpenFrontendGL2CG());
	setup.SetResolution(800, 600);
	setup.SetTitle("Hello Frontend!\n");
	setup.Start();

	// Hook mouse and keyboard events
	Keyboard keyboard(setup.GetWindow());
	Mouse mouse(setup.GetWindow());

	// Initialize painter and the sprite image
	Simple2D painter(setup.GetGraphicsDevice());
	RTexture2D image("data/image.png");

	// Initialize blend mode used to draw the sprite
	Graphics::BlendStateDescriptor blend;
	blend.BlendEnabled = true;
	blend.BlendSrcRGB = Graphics::BlendOperandSrcAlpha;
	blend.BlendDstRGB = Graphics::BlendOperandOneMinusSrcAlpha;
	
	// Initialize sprite position
	Math::Vector2 position(100, 100);

	while (setup.Update())
	{
		// Clear the screen
		setup.GetGraphicsDevice()->Clear(Graphics::ClearBuffersAll, 0, 0, 0, 0, 1, 0);

		// Get the duration of last frame
		float frameTime = setup.GetFrameTime();

		// Move the sprite using the arrow keys
		if (keyboard.KeyDown(GUI::KeyLeftArrow)) position.x -= frameTime * 300.0f;
		if (keyboard.KeyDown(GUI::KeyRightArrow)) position.x += frameTime * 300.0f;
		if (keyboard.KeyDown(GUI::KeyUpArrow)) position.y -= frameTime * 300.0f;
		if (keyboard.KeyDown(GUI::KeyDownArrow)) position.y += frameTime * 300.0f;

		// Lock the sprite inside the window
		position.x = Math::Max<float>(0, position.x);
		position.y = Math::Max<float>(0, position.y);
		position.x = Math::Min<float>(position.x, setup.GetWindow()->GetWidth()-image->GetWidth());
		position.y = Math::Min<float>(position.y, setup.GetWindow()->GetHeight()-image->GetHeight());

		// Set blend mode
		setup.GetState()->Blend.Push(blend);

		// Draw sprite
		painter.DrawQuad(setup.GetState(), position, image);

		// Restore blend mode
		setup.GetState()->Blend.Pop();
	}
}