/*
 * 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/.
 */

#include "TextExampleApp.hpp"
#include "Scene/Scene.hpp"
#include "Scene/Shader/Shader.hpp"
#include "Scene/Geometry.hpp"
#include "Scene/Text.hpp"
#include "Scene/GeometryFactory.hpp"
#include "Scene/Material.hpp"
#include "Scene/Vertex.hpp"
#include "Scene/SimpleDrawable.hpp"
#include "Scene/UI/PerformanceInfo.hpp"
#include "Scene/UniformBuffer.hpp"
#include "Input/InputManager.hpp"
#include "Host/GraphicsAppManager.hpp"
#include "Host/GLFW/WindowGLFW.hpp"
#include "Math/Math.hpp"
#include "Base/EngineConfiguration.hpp"
#include "Controller/FreeCamCameraController.hpp"
#include "Image/ImageLoaderPng.hpp"
#include "Scene/FontAtlasGenerator.hpp"

#ifdef _WIN32
	#undef TRANSPARENT
#endif

namespace OpenVulkano
{
	using namespace Scene;
	using namespace Input;
	using namespace Math;

	class TextExampleAppImpl final : public TextExampleApp
	{
	public:

		void Init() override
		{
			auto engineConfig = OpenVulkano::EngineConfiguration::GetEngineConfiguration();
			engineConfig->SetNumThreads(4);
			engineConfig->SetPreferFramebufferFormatSRGB(false);
			
			std::srand(1); // Fix seed for random numbers
			m_scene.Init();
			m_cam.Init(70, 16, 9, 0.1f, 100);
			m_scene.SetCamera(&m_cam);

			m_cfg.applyBorder = true;

			const std::array texts = { "ABab?.^{}_cdFGETG123)(", "Hello, World!" };
			const int N = texts.size();
			const std::string font = (OpenVulkano::Utils::GetFontsDirectory() / "Roboto-Regular.ttf").string();
			m_uniBuffer.Init(sizeof(TextConfig), &m_cfg, 3);
			m_nodesPool.resize(N);
			m_drawablesPool.resize(N);

			m_shader.AddShaderProgram(OpenVulkano::ShaderProgramType::VERTEX, "Shader/text");
			m_shader.AddShaderProgram(OpenVulkano::ShaderProgramType::FRAGMENT, "Shader/text");
			m_shader.AddVertexInputDescription(OpenVulkano::Vertex::GetVertexInputDescription());
			m_shader.AddDescriptorSetLayoutBinding(Texture::DESCRIPTOR_SET_LAYOUT_BINDING);
			m_shader.AddDescriptorSetLayoutBinding(UniformBuffer::DESCRIPTOR_SET_LAYOUT_BINDING);
			m_shader.alphaBlend = true;
			m_shader.cullMode = CullMode::NONE;

			m_atlasGenerator.GenerateAtlas(font, (OpenVulkano::Utils::GetBuildDirectory() / "atlas.png").string());

			for (int i = 0; i < texts.size(); i++)
			{
				Text* t = new Text();
				t->SetFontAtlasGenerator(&m_atlasGenerator);
				t->SetConfig(m_cfg);
				t->SetUniformBuffer(&m_uniBuffer);
				t->SetShader(&m_shader);
				t->GenerateText(texts[i]);
				m_drawablesPool[i] = t;
				m_nodesPool[i].Init();
				m_nodesPool[i].SetMatrix(
				Math::Utils::translate(glm::mat4x4(1.f), Vector3f(-3 + std::rand() % 3, -2 + std::rand() % 4, 2)));
				m_nodesPool[i].AddDrawable(m_drawablesPool[i]);
				m_scene.GetRoot()->AddChild(&m_nodesPool[i]);
			}
			GetGraphicsAppManager()->GetRenderer()->SetScene(&m_scene);
			m_camController.Init(&m_cam);
			m_camController.SetDefaultKeybindings();
			m_camController.SetPosition({ 0, 0, 5 });
			m_camController.SetBoostFactor(5);
			
			std::shared_ptr<OpenVulkano::Scene::UI::PerformanceInfo> m_perfInfo =
			std::make_shared<OpenVulkano::Scene::UI::PerformanceInfo>();
			m_ui.AddElement(m_perfInfo);
			GetGraphicsAppManager()->GetRenderer()->SetActiveUi(&m_ui);
		}

		void Tick() override
		{
			m_camController.Tick();
		}

		void Close() override
		{
			for (SimpleDrawable* d: m_drawablesPool)
			{
				delete d;
			}
		}

	private:
		OpenVulkano::Scene::Scene m_scene;
		PerspectiveCamera m_cam;
		UniformBuffer m_uniBuffer;
		OpenVulkano::FreeCamCameraController m_camController;
		Shader m_shader;
		TextConfig m_cfg;
		FontAtlasGenerator m_atlasGenerator;
		std::vector<SimpleDrawable*> m_drawablesPool;
		std::vector<Node> m_nodesPool;
		Vector3f_SIMD m_position = { 0, 0, -10 };
		OpenVulkano::Scene::UI::SimpleUi m_ui;
		std::shared_ptr<OpenVulkano::Scene::UI::PerformanceInfo> m_perfInfo;
	};

	IGraphicsApp* TextExampleApp::Create() { return new TextExampleAppImpl(); }

	std::unique_ptr<IGraphicsApp> TextExampleApp::CreateUnique()
	{ 
		return std::make_unique<TextExampleAppImpl>();
	}

}

#pragma clang diagnostic pop
#pragma clang diagnostic pop