#include "phongmodule.h"
#include "lights.h"
#include "shader.h"
#include "phongentity.h"
#include "camera.h"
#include "mesh.h"
#include "sparrowrenderer.h"
#include "glassert.h"
#include <glm/ext.hpp>

Shader* PhongModule::shaders[NB_SHADERS] = {0, 0};

PhongModule::PhongModule(Lights::Light* myDirLight, Lights* myPointLights) :
    dirLight(myDirLight),
    pointLights(myPointLights)
{
    if(!SparrowRenderer::isModernOpenGLAvailable())
    {
        glAssert(glEnable(GL_LIGHTING));
        glAssert(glEnable(GL_LIGHT0));
        glAssert(glLightfv(GL_LIGHT0, GL_AMBIENT, glm::value_ptr(glm::vec4(glm::vec3(0.1f), 1))));
        glAssert(glLightfv(GL_LIGHT0, GL_POSITION, glm::value_ptr(glm::vec4(dirLight->position, 0))));
        // TODO add point lights
    }
}

void PhongModule::addEntity(PhongEntity* myEntity)
{
	entities.push_back(myEntity);
}

void PhongModule::clearEntities()
{
	entities.clear();
}

void PhongModule::renderGL(Camera* myCamera)
{
    if(!SparrowRenderer::isModernOpenGLAvailable())
    {
        glLoadIdentity();
        glAssert(glLightfv(GL_LIGHT0, GL_DIFFUSE, glm::value_ptr(glm::vec4(dirLight->color, 1))));
        glAssert(glLightfv(GL_LIGHT0, GL_SPECULAR, glm::value_ptr(glm::vec4(dirLight->color, 1))));
    }
    for(PhongEntity* e : entities)
        e->draw(myCamera->getViewMatrix(), myCamera->getProjectionMatrix(), dirLight, pointLights);
}

void PhongModule::setShader(ShaderType slot, Shader* myShader)
{
    shaders[slot] = myShader;
}

Shader* PhongModule::getShader(ShaderType slot)
{
    return shaders[slot];
}