/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

#pragma once

#include "Base/Event.hpp"
#include "Base/Wrapper.hpp"
#include "Scene/Drawable.hpp"
#include "Scene/Shader/Shader.hpp"
#include "Scene/Texture.hpp"
#include "Scene/UniformBuffer.hpp"

namespace OpenVulkano
{
	namespace AR
	{
		class ArSession;
		class ArFrame;
	}

	namespace Scene
	{
		class ArBackgroundDrawable final : public Drawable
		{
			Shader m_shader;
			UniformBuffer m_intrinsicsBuffer;
			EventHandle m_eventHandle;
			Ptr<AR::ArFrame> m_nextFrame, m_currentFrame, m_lastFrame;
			const Texture* m_texture = nullptr;

			void OnNewArFrame(const Ptr<AR::ArFrame>& frame);

		public:
			ArBackgroundDrawable(const Ptr<AR::ArSession>& arSession = nullptr);

			~ArBackgroundDrawable() override { ArBackgroundDrawable::Close(); }

			void Init(const Ptr<AR::ArSession>& arSession);

			void Tick();

			void Close() override;

			const Texture* GetTexture() const { return m_texture; }

			UniformBuffer& GetBuffer() { return m_intrinsicsBuffer; }
		};
	}
}