/*
  Copyright 2012-2020 David Robillard <d@drobilla.net>

  Permission to use, copy, modify, and/or distribute this software for any
  purpose with or without fee is hereby granted, provided that the above
  copyright notice and this permission notice appear in all copies.

  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

/**
   @file pugl_cxx_demo.cpp
   @brief A simple demo of the Pugl C++ API.
*/

#include "cube_view.h"
#include "demo_utils.h"
#include "test/test_utils.h"

#include "pugl/pugl.h"
#include "pugl/pugl.hpp"
#include "pugl/pugl.ipp" // IWYU pragma: keep
#include "pugl/pugl_gl.hpp"

#include <cmath>

class CubeView : public pugl::View
{
public:
	explicit CubeView(pugl::World& world)
	    : pugl::View{world}
	{}

	CubeView(const CubeView&) = delete;
	CubeView& operator=(const CubeView&) = delete;

	CubeView(CubeView&&) = delete;
	CubeView& operator=(CubeView&&) = delete;

	~CubeView() override = default;

	pugl::Status onConfigure(const pugl::ConfigureEvent& event) override;
	pugl::Status onUpdate(const pugl::UpdateEvent& event) override;
	pugl::Status onExpose(const pugl::ExposeEvent& event) override;
	pugl::Status onKeyPress(const pugl::KeyPressEvent& event) override;
	pugl::Status onClose(const pugl::CloseEvent& event) override;

	bool quit() const { return _quit; }

private:
	double _xAngle{0.0};
	double _yAngle{0.0};
	double _lastDrawTime{0.0};
	bool   _quit{false};
};

pugl::Status
CubeView::onConfigure(const pugl::ConfigureEvent& event)
{
	reshapeCube(static_cast<float>(event.width),
	            static_cast<float>(event.height));

	return pugl::Status::success;
}

pugl::Status
CubeView::onUpdate(const pugl::UpdateEvent&)
{
	return postRedisplay();
}

pugl::Status
CubeView::onExpose(const pugl::ExposeEvent&)
{
	const double thisTime = world().time();
	const double dTime    = thisTime - _lastDrawTime;
	const double dAngle   = dTime * 100.0;

	_xAngle = fmod(_xAngle + dAngle, 360.0);
	_yAngle = fmod(_yAngle + dAngle, 360.0);
	displayCube(cobj(),
	            8.0f,
	            static_cast<float>(_xAngle),
	            static_cast<float>(_yAngle),
	            false);

	_lastDrawTime = thisTime;

	return pugl::Status::success;
}

pugl::Status
CubeView::onKeyPress(const pugl::KeyPressEvent& event)
{
	if (event.key == PUGL_KEY_ESCAPE || event.key == 'q') {
		_quit = true;
	}

	return pugl::Status::success;
}

pugl::Status
CubeView::onClose(const pugl::CloseEvent&)
{
	_quit = true;

	return pugl::Status::success;
}

int
main(int argc, char** argv)
{
	const PuglTestOptions opts = puglParseTestOptions(&argc, &argv);
	if (opts.help) {
		puglPrintTestUsage("pugl_cxx_demo", "");
		return 1;
	}

	pugl::World    world{pugl::WorldType::program};
	CubeView       view{world};
	PuglFpsPrinter fpsPrinter{};

	world.setClassName("PuglCppTest");

	view.setWindowTitle("Pugl C++ Test");
	view.setDefaultSize(512, 512);
	view.setMinSize(64, 64);
	view.setAspectRatio(1, 1, 16, 9);
	view.setBackend(pugl::glBackend());
	view.setHint(pugl::ViewHint::resizable, opts.resizable);
	view.setHint(pugl::ViewHint::samples, opts.samples);
	view.setHint(pugl::ViewHint::doubleBuffer, opts.doubleBuffer);
	view.setHint(pugl::ViewHint::swapInterval, opts.sync);
	view.setHint(pugl::ViewHint::ignoreKeyRepeat, opts.ignoreKeyRepeat);
	view.realize();
	view.showWindow();

	unsigned framesDrawn = 0;
	while (!view.quit()) {
		world.update(0.0);

		++framesDrawn;
		puglPrintFps(world.cobj(), &fpsPrinter, &framesDrawn);
	}

	return 0;
}