#pragma once

#include <filesystem>
#include <charconv>
#include <string_view>

#include "glm/mat4x4.hpp"
#include "util/result.hpp"
#include "util/string_list.hpp"
#include "assets/prefetch_queue.hpp"

#include "../../read_buffers"
#include "../../data_stores"
#include "assets/prefetch_lookup.hpp"



template<bool Normal, bool Color, bool Reflectance>
struct generic_3dtk_loader
{
	[[nodiscard]] static std::error_code prefetch(
		const ztu::string_list& filenames,
		prefetch_queue& queue
	);

	[[nodiscard]] static std::error_code load(
		dynamic_point_cloud_buffer& buffer,
		const file_dir_list& paths,
		dynamic_point_cloud_store& store,
		prefetch_lookup& id_lookup,
		bool pedantic = false
	);

protected:

	[[nodiscard]] static ztu::result<pose_prefetch_lookup::index_type> parse_index(
		std::string_view filename
	);

	ztu::result<std::pair<ztu::u32, std::chars_format>> analyze_component_format(
		std::string_view line
	);

	void transform_point_cloud(
		std::span<point_cloud_vertex_components::position::value_type> points,
		const glm::mat4& pose
	);

private:
	std::error_code read_point_file(
		const std::filesystem::path& filename,
		dynamic_point_cloud_buffer& point_cloud
	);
};

#define INCLUDE_GENERIC_3DTK_LOADER_IMPLEMENTATION
#include "../../data_parsers"
#undef INCLUDE_GENERIC_3DTK_LOADER_IMPLEMENTATION