#include "model.h"
#include "mesh.h"
#include "state.h"
#include "../lib/glm/gtc/matrix_transform.hpp"

Model::Model(const std::shared_ptr<Mesh>& mesh)
    : mesh_(mesh)
{
}

void Model::draw()
{
	if (!mesh_)
		return;

	// Build model matrix: Translation * Rotation * Scale
	glm::mat4 model = glm::mat4(1.0f);

	// Translation
	model = glm::translate(model, position_);

	// Rotation (applying X, Y, Z rotations)
	model = glm::rotate(model, rotation_.x, glm::vec3(1.0f, 0.0f, 0.0f));
	model = glm::rotate(model, rotation_.y, glm::vec3(0.0f, 1.0f, 0.0f));
	model = glm::rotate(model, rotation_.z, glm::vec3(0.0f, 0.0f, 1.0f));

	// Scale
	model = glm::scale(model, scale_);

	// Set the model matrix in state
	state::model_matrix = model;

	// Draw the mesh
	mesh_->draw();
}