/*******************************************************************************
 *
 * MIT License
 *
 * Copyright (c) 2017 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 *******************************************************************************/

#include <miopen/db_path.hpp>
#include <miopen/env.hpp>
#include <miopen/stringutils.hpp>
#include <miopen/expanduser.hpp>
#include <miopen/logger.hpp>

#include <boost/filesystem.hpp>

#include <cstdlib>
#ifdef __linux__
#include <dlfcn.h>
#endif

MIOPEN_DECLARE_ENV_VAR(MIOPEN_SYSTEM_DB_PATH)
MIOPEN_DECLARE_ENV_VAR(MIOPEN_USER_DB_PATH)

namespace miopen {

boost::filesystem::path GetLibPath()
{
    boost::filesystem::path path = {""};
#ifdef __linux__
    Dl_info info;

    if(dladdr(reinterpret_cast<void*>(miopenCreate), &info) != 0)
    {
        path = boost::filesystem::canonical(boost::filesystem::path{info.dli_fname});
        MIOPEN_LOG_I2(std::string("Lib Path: ") + path.string());
        if(path.empty())
            return path;

        path = path.parent_path();
    }
    return path;
#else
    MIOPEN_THROW(miopenStatusNotImplemented);
#endif
}

std::string GetSystemDbPath()
{
    auto p = GetStringEnv(MIOPEN_SYSTEM_DB_PATH{});
    if(p == nullptr)
#if MIOPEN_BUILD_DEV
        return "${MIOPEN_SYSTEM_DB_PATH}";
#else
    {
        // Get the module path and construct the db path
        static const auto lib_path = (GetLibPath().parent_path() / "share/miopen/db/").string();
        return lib_path;
    }
#endif
    else
        return p;
}

namespace {
std::string PrepareUserDbPath()
{
    auto p = GetStringEnv(MIOPEN_USER_DB_PATH{});
    if(p == nullptr)
        p = "${MIOPEN_USER_DB_PATH}";
    return ExpandUser(p);
}
} // namespace

std::string GetUserDbSuffix() { return "${MIOPEN_USER_DB_SUFFIX}"; }

std::string GetSystemFindDbSuffix() { return "${MIOPEN_SYSTEM_FIND_DB_SUFFIX}"; }

const std::string& GetUserDbPath()
{
    static const auto instance = PrepareUserDbPath();
    return instance;
}

} // namespace miopen