#include "SafeFileUtils.h"

#ifdef _WIN32
#include <winerror.h>
#endif

namespace fs = boost::filesystem;

void safeRemoveFile(const fs::path& p, const fs::path& tempFolder)
{
    try
    {
        bool result = fs::remove(p);
    }
    catch (fs::filesystem_error& e)
    {
        if (e.code().category() == boost::system::system_category()
#ifdef _WIN32
            && e.code().value() == ERROR_ACCESS_DENIED)
#else
            && e.code().value() == EACCES)
#endif
        {
            auto cleanupFolder = tempFolder;

            if (!fs::exists(cleanupFolder))
            {
                fs::create_directories(cleanupFolder);
            }

            if (!fs::is_directory(cleanupFolder))
            {
                throw std::runtime_error(".upd/.remove folder is not directory");
            }

            auto fileName = fs::unique_path();
            fs::rename(p, cleanupFolder / fileName);
        }
        else
        {
            throw;
        }
    }
}

SafeFile safeCreateFile(const fs::path & p, const fs::path& tempFolder)
{
    if (fs::exists(p))
    {
        safeRemoveFile(p, tempFolder);
    }
    return SafeFile(p);
}