#pragma once

#include "VTUtils.hpp"
#include <string>
#include <filesystem>

#if defined(LIBCMO_OS_WIN32)
#include <Windows.h>
#include <fileapi.h>
#else
#include <iconv.h>
#endif

namespace LibCmo {
	namespace Encoding {

#pragma region assist functions

#if defined(LIBCMO_OS_WIN32)

		bool GetWindowsCodePage(const char* u8_encoding_spec, UINT* result);

		bool WcharToChar(const wchar_t* src, std::string& dest, UINT codepage);
		bool WcharToChar(std::wstring& src, std::string& dest, UINT codepage);

		bool CharToWchar(const char* src, std::wstring& dest, UINT codepage);
		bool CharToWchar(std::string& src, std::wstring& dest, UINT codepage);

		bool CharToChar(const char* src, std::string& dest, UINT src_codepage, UINT dest_codepage);
		bool CharToChar(std::string& src, std::string& dest, UINT src_codepage, UINT dest_codepage);

#else
#error NO IMPLEMENTATION FOR LINUX ENCODING!
#endif

#pragma endregion

#pragma region core functions

#if defined(LIBCMO_OS_WIN32)

		/// <summary>
		/// Token is the ticket for using encoding functions.
		/// It should be created by "GenerateEncodingToken" and free by "DestroyEncodingToken".
		/// </summary>
		using ENCODING_TOKEN = UINT*;
		extern const ENCODING_TOKEN ENCODING_TOKEN_DEFAULT;

		ENCODING_TOKEN CreateEncodingToken(std::string& token_string);
		void DestroyEncodingToken(ENCODING_TOKEN token);

		void GetUtf8VirtoolsName(std::string& native_name, std::string& u8_name, ENCODING_TOKEN token);
		void GetNativeVirtoolsName(std::string& u8_name, std::string& native_name, ENCODING_TOKEN token);

		void SetStdPathFromU8Path(std::filesystem::path& stdpath, const char* u8_path);
		FILE* OpenStdPathFile(std::filesystem::path& u8_filepath, bool is_read);

#else

		/// <summary>
		/// Token is the ticket for using encoding functions.
		/// It should be created by "GenerateEncodingToken" and free by "DestroyEncodingToken".
		/// </summary>
		using ENCODING_TOKEN = char*;
		extern const ENCODING_TOKEN ENCODING_TOKEN_DEFAULT;

#error NO IMPLEMENTATION FOR LINUX ENCODING!
#endif

#pragma endregion

	}
}