#include "HydraCamera.h"
#include "../engine/HydraEngine.h"
#include "../windowmanager/HydraRenderSettings.h"
#include "../actor/HydraActor.h"
#include "../actor/HydraActorManager.h"	


glm::mat4x4 HydraCamera::GetView()
{
	glm::dvec3 actor_pos = glm::dvec3(0,0,0);
	
	glm::mat4 actor_rot = glm::mat4(1);
	glm::vec3 actor_euler = glm::vec3(0);

	if(m_attached_actor != INVALID_HYDRA_ID)
	{
		HydraActor* actor = GetEngine()->ActorManager()->GetActor(m_attached_actor);
		if(actor != nullptr)
		{
			actor_pos =  (GetEngine()->ActorManager()->GetActorPosition(m_attached_actor)) * glm::dvec3(-1, -1, -1);
			actor_euler = GetEngine()->ActorManager()->GetActorOrientation(m_attached_actor);
			actor_rot = glm::eulerAngleXYZ(actor_euler.x, actor_euler.y, actor_euler.z);
		}
	}
	
	glm::mat4 trans = glm::translate(actor_pos);
	glm::mat4 rot =  actor_rot;// * glm::eulerAngleXYZ(EulerAngle.x, EulerAngle.y, EulerAngle.z);

	glm::mat4 camera_transform =   rot * trans;
	return camera_transform;
}

glm::mat4x4 HydraCamera::GetProjection()
{
	HydraRenderSettings render_settings = GetEngine()->RenderSettings();
	float fovRad = glm::radians(render_settings.FOV);
	//glm::mat4 projection = glm::perspectiveLH<float>(fovRad, (float)render_settings->ViewportWidth / (float)render_settings->ViewportHeight, render_settings->Near, render_settings->Far);
	glm::mat4 projection = glm::perspectiveRH<float>(fovRad, (float)render_settings.ViewportWidth / (float)render_settings.ViewportHeight, render_settings.Near, render_settings.Far);
	// glm::mat4 correction = {1, 0, 0,   0,
	// 						0,-1, 0,   0,
	// 					    0, 0, 0.5f,0.5f,
	// 						0,0,  0,   1};
	// projection = correction * projection;
	return projection;
}

glm::mat4x4 HydraCamera::GetOrthoProjection()
{
	HydraRenderSettings render_settings = GetEngine()->RenderSettings();
	float fovRad = glm::radians(render_settings.FOV);
	glm::mat4 projection = glm::ortho<float>(0.0f, render_settings.DisplayWidth, 0, render_settings.DisplayHeight, 0.0f, 1000.0f);
	
		
	return projection;
}

glm::vec3 HydraCamera::GetPosition()
{
    glm::dvec3 actor_pos = glm::dvec3(0,0,0);
	
	if(m_attached_actor != INVALID_HYDRA_ID)
	{
		HydraActor* actor = GetEngine()->ActorManager()->GetActor(m_attached_actor);
		if(actor != nullptr)
		{
			actor_pos =  (GetEngine()->ActorManager()->GetActorPosition(m_attached_actor)) * glm::dvec3(1, 1, 1);
	
		}
	}
	return actor_pos;
	
}

void HydraCamera::AttachToActor(HydraID actorID)
{
	m_attached_actor = actorID;
}