#include "scene.h"
#include "glassert.h"
#include <glm/glm.hpp>
#include <glm/ext.hpp>
#include "camera.h"
#include "entity.h"
#include "shader.h"
#include "material.h"

// MAIN METHODS

Scene::~Scene()
{
    for(Entity* e : entities)
        delete(e);
}

void Scene::drawAll()
{
    glm::mat4 viewMatrix = camera->getViewMatrix();
    glm::mat4 projectionMatrix = camera->getProjectionMatrix();
    for(Entity* e : entities)
    {
        Shader* shader = e->getShader();
        shader->bind();
        if(e->getMaterial()->requireLights())
        {
            directionnalLights.bind(shader->getLocation("dirLights"), shader->getLocation("nbDirLights"), shader);
            pointLights.bind(shader->getLocation("pointLights"), shader->getLocation("nbPointLights"), shader);
        }
        e->draw(viewMatrix, projectionMatrix);
    }
}

// ENTITIES

void Scene::addEntity(Entity* parent, Mesh* mesh, Material* mat)
{
    entities.push_back(new Entity(parent, mesh, mat));
}

void Scene::addEntity(Mesh* mesh, Material* mat)
{
    entities.push_back(new Entity(NULL, mesh, mat));
}

void Scene::addEntity(Entity* entity)
{
    entities.push_back(entity);
}

// LIGHTS

void Scene::addDirectionnalLight(const glm::vec3 &position, const glm::vec3 &color)
{
    directionnalLights.addLight(position, color);
}

void Scene::addPointLight(const glm::vec3 &position, const glm::vec3 &color)
{
    pointLights.addLight(position, color);
}

// CAMERA

void Scene::setCamera(Camera* myCamera)
{
    camera = myCamera;
}

Camera* Scene::getCamera()
{
    return camera;
}