#pragma once

#include <unordered_map>

#include "assets/dynamic_read_buffers/dynamic_texture_buffer.hpp"
#include "assets/dynamic_data_stores/dynamic_texture_store.hpp"
#include "opengl/handles/texture_handle.hpp"
#include <vector>

#include "opengl/metadata/texture_metadata.hpp"
#include "opengl/resource_management/resource_manager.hpp"

namespace zgl
{
class texture_manager
{
public:
	using store_type = dynamic_texture_store;
	using store_id_type = store_type::id_type;
	using metadata_type = texture_metadata;
	using handle_type = texture_handle;
	using resource_manager_type = resource_manager<store_id_type, metadata_type>;
	using texture_entry_type = std::pair<handle_type, metadata_type>;

	static constexpr std::size_t min_garbage_collection_count = 4;

	void process(store_type& store);

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

	void collect_garbage(bool force = false);

private:

	resource_manager_type m_resource_manager;

	std::vector<std::pair<dynamic_texture_store::id_type, const dynamic_texture_buffer&>> m_texture_buffer;
	std::vector<GLuint> m_texture_id_buffer;
};

}