#ifndef INCLUDE_POINT_CLOUD_BATCH_IMPLEMENTATION
#	error Never include this file directly include 'point_cloud_batch.hpp'
#endif


inline point_cloud_batch::id_type point_cloud_batch::add(
	const zgl::point_cloud_handle& point_cloud,
	const aabb& bounding_box,
	const zgl::model_matrix_handle& transform
) {
	const auto new_id = m_next_id++;

	m_point_clouds.push_back(point_cloud);
	m_transforms.push_back(transform);
	m_bounding_boxes.push_back(bounding_box);
	m_id_lookup.push_back(new_id);

	return new_id;
}

std::optional<aabb> point_cloud_batch::bounding_box(id_type id)
{
	const auto lookup_it = std::ranges::find(m_id_lookup, id);

	if (lookup_it == m_id_lookup.end())
	{
		return std::nullopt;
	}

	const auto index = lookup_it - m_id_lookup.begin();

	const auto& base_bounding_box = m_bounding_boxes[index];
	const auto& transform = m_transforms[index];

	return base_bounding_box.transformed(transform);
}

inline bool point_cloud_batch::remove(id_type id)
{
	const auto lookup_it = std::ranges::find(m_id_lookup, id);

	if (lookup_it == m_id_lookup.end())
	{
		return false;
	}

	const auto index = lookup_it - m_id_lookup.begin();

	m_id_lookup.erase(m_id_lookup.begin() + index);
	m_point_clouds.erase(m_point_clouds.begin() + index);
	m_transforms.erase(m_transforms.begin() + index);

	return true;
}

inline std::span<const zgl::point_cloud_handle> point_cloud_batch::point_clouds() const
{
	return m_point_clouds;
}

inline std::span<const zgl::model_matrix_handle> point_cloud_batch::transforms() const
{
	return m_transforms;
}

inline std::span<const aabb> point_cloud_batch::bounding_boxes() const
{
	return m_bounding_boxes;
}