#include "PrecompiledHeader.h"
#include "RenderSystem.h"
#include "World.h"

void Systems::RenderSystem::RegisterResourceTypes(std::shared_ptr<::ResourceManager> rm)
{
	rm->RegisterType("Shader", [](std::string resourceName) { return new ShaderProgram(resourceName); });
}

void Systems::RenderSystem::RegisterComponents(ComponentFactory* cf)
{
	cf->Register<Components::Camera>([]() { return new Components::Camera(); });
	cf->Register<Components::Model>([]() { return new Components::Model(); });
	cf->Register<Components::Sprite>([]() { return new Components::Sprite(); });
	cf->Register<Components::PointLight>([]() { return new Components::PointLight(); });
	cf->Register<Components::DirectionalLight>([]() { return new Components::DirectionalLight(); });
	cf->Register<Components::Viewport>([]() { return new Components::Viewport(); });
	cf->Register<Components::BlendMap>([]() { return new Components::BlendMap(); });
}

void Systems::RenderSystem::OnEntityCommit(EntityID entity)
{
	//auto transform = m_World->GetComponent<Components::Transform>(entity);

	//auto camera = m_World->GetComponent<Components::Camera>(entity);
	//if (transform && camera)
	//{
	//	m_Renderer->RegisterCamera(entity, camera->FOV, camera->NearClip, camera->FarClip);
	//	m_Renderer->UpdateCamera(entity, m_TransformSystem->AbsolutePosition(entity), m_TransformSystem->AbsoluteOrientation(entity), camera->FOV, camera->NearClip, camera->FarClip);
	//}

	//auto viewport = m_World->GetComponent<Components::Viewport>(entity);
	//if (viewport)
	//{
	//	m_Renderer->RegisterViewport(entity, viewport->Left, viewport->Top, viewport->Right, viewport->Bottom);
	//	if (viewport->Camera != 0)
	//	{
	//		m_Renderer->UpdateViewport(entity, viewport->Camera);
	//	}
	//}
}

void Systems::RenderSystem::UpdateEntity(double dt, EntityID entity, EntityID parent)
{
	//auto templateComponent = m_World->GetComponent<Components::Template>(entity);
	//if (templateComponent)
	//	return;

	//auto transformComponent = m_World->GetComponent<Components::Transform>(entity);

	//// Draw models
	//auto modelComponent = m_World->GetComponent<Components::Model>(entity);
	//if (transformComponent && modelComponent)
	//{
	//	auto model = m_World->ResourceManager->Load<Model>("Model", modelComponent->ModelFile);
	//	if (model)
	//	{
	//		/*glm::vec3 position = m_TransformSystem->AbsolutePosition(entity);
	//		glm::quat orientation = m_TransformSystem->AbsoluteOrientation(entity);
	//		glm::vec3 scale = m_TransformSystem->AbsoluteScale(entity);*/
	//		Components::Transform absoluteTransform = m_TransformSystem->AbsoluteTransform(entity);
	//		m_Renderer->AddModelToDraw(model, absoluteTransform.Position, absoluteTransform.Orientation, absoluteTransform.Scale, modelComponent->Visible, modelComponent->ShadowCaster);
	//	}
	//}

	//auto pointLightComponent = m_World->GetComponent<Components::PointLight>(entity);
	//if (transformComponent && pointLightComponent)
	//{
	//	glm::vec3 position = m_TransformSystem->AbsolutePosition(entity);
	//	m_Renderer->AddPointLightToDraw(
	//		position,
	//		pointLightComponent->Specular,
	//		pointLightComponent->Diffuse,
	//		pointLightComponent->specularExponent,
	//		pointLightComponent->ConstantAttenuation,
	//		pointLightComponent->LinearAttenuation,
	//		pointLightComponent->QuadraticAttenuation
	//		);
	//}

	//auto cameraComponent = m_World->GetComponent<Components::Camera>(entity);
	//if (transformComponent && cameraComponent)
	//{
	//	m_Renderer->UpdateCamera(entity
	//		, m_TransformSystem->AbsolutePosition(entity)
	//		, m_TransformSystem->AbsoluteOrientation(entity)
	//		, cameraComponent->FOV
	//		, cameraComponent->NearClip
	//		, cameraComponent->FarClip);
	//}

	//auto viewportComponent = m_World->GetComponent<Components::Viewport>(entity);
	//if (viewportComponent)
	//{
	//	if (viewportComponent->Camera != 0)
	//	{
	//		m_Renderer->UpdateViewport(entity, viewportComponent->Camera);
	//	}
	//}

	//auto spriteComponent = m_World->GetComponent<Components::Sprite>(entity);
	//if (transformComponent && spriteComponent)
	//{
	//	//TEMP
	//	Texture* texture = m_World->ResourceManager->Load<Texture>("Texture", spriteComponent->SpriteFile);
	//	//glBindTexture(GL_TEXTURE_2D, texture);
	//	auto transform = m_World->GetComponent<Components::Transform>(spriteComponent->Entity);
	//	glm::quat orientation2D = glm::angleAxis(glm::eulerAngles(transform->Orientation).z, glm::vec3(0, 0, -1));
	//	m_Renderer->AddTextureToDraw(texture, transform->Position, orientation2D, transform->Scale);
	//}
}

void Systems::RenderSystem::Initialize()
{
	//m_TransformSystem = m_World->GetSystem<Systems::TransformSystem>();

	//m_Renderer->SetSphereModel(m_World->ResourceManager->Load<Model>("Model", "Models/Placeholders/PhysicsTest/Sphere.obj"));
}