// Copyright Epic Games, Inc. All Rights Reserved.

#include "zenutil/authutils.h"
#include "zenutil/config/commandlineoptions.h"

#include <zencore/filesystem.h>

namespace zen {
using namespace std::literals;

std::string_view
GetOidcTokenPathEnvVariableName()
{
#if ZEN_PLATFORM_WINDOWS
	return "UE-OidcTokenExePath"sv;
#endif
#if ZEN_PLATFORM_LINUX || ZEN_PLATFORM_MAC
	return "UE_OidcTokenExePath"sv;
#endif
}

std::filesystem::path
FindOidcTokenExePath(std::string_view OidcTokenAuthExecutablePath)
{
	if (OidcTokenAuthExecutablePath.empty())
	{
		std::filesystem::path OidcTokenPath = GetEnvVariable(GetOidcTokenPathEnvVariableName());
		if (IsFile(OidcTokenPath))
		{
			return OidcTokenPath;
		}
		const std::string OidcExecutableName = "OidcToken" ZEN_EXE_SUFFIX_LITERAL;
		OidcTokenPath						 = (GetRunningExecutablePath().parent_path() / OidcExecutableName).make_preferred();
		if (IsFile(OidcTokenPath))
		{
			return OidcTokenPath;
		}
		OidcTokenPath = (std::filesystem::current_path() / OidcExecutableName).make_preferred();
		if (IsFile(OidcTokenPath))
		{
			return OidcTokenPath;
		}
	}
	else
	{
		std::filesystem::path OidcTokenPath = std::filesystem::absolute(StringToPath(OidcTokenAuthExecutablePath)).make_preferred();
		if (IsFile(OidcTokenPath))
		{
			return OidcTokenPath;
		}
	}
	return {};
};

}  // namespace zen