#pragma once

#include "assets/data/material_data.hpp"
#include "assets/data_stores/material_store.hpp"
#include "opengl/handles/material_handle.hpp"
#include <vector>

#include "assets/data_stores.hpp"
#include "opengl/metadata/material_metadata.hpp"
#include "opengl/resource_management/resource_manager.hpp"

namespace zgl
{
class material_manager
{
public:
	using store_type = assets::material_store;
	using store_id_type = store_type::id_type;
	using metadata_type = material_metadata;
	using handle_type = material_handle;
	using resource_manager_type = resource_manager<store_id_type, metadata_type>;
	// TODO add reference and const_reference
	using entry_type = std::pair<const handle_type&, const metadata_type&>;

	static constexpr std::size_t min_garbage_collection_count = 4;

	void process(const store_type& materials);

	std::optional<entry_type> get_handle(store_id_type id);

	void collect_garbage(bool force = false);

protected:
	resource_manager_type m_resource_manager;

private:
	std::vector<std::pair<store_id_type, const assets::material_data&>> m_material_buffer;
	std::vector<GLuint> m_material_id_buffer;
};

}