/**
 * Copyright (c) Huawei Technologies Co., Ltd. 2024-2024. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * Description: Defines some common functions in device object.
 */
#ifndef DATASYSTEM_COMMON_DEVICE_DEVICE_HELPER_H
#define DATASYSTEM_COMMON_DEVICE_DEVICE_HELPER_H

#include <string>
#include <tuple>
#include "datasystem/common/util/strings_util.h"
#include "datasystem/common/util/status_helper.h"
namespace datasystem {
static const std::string P2P_DEFAULT_MASTER = "DEFAULT";
static const int32_t ALL_DEVICE_ID = -1;
/**
 * @brief Concat the client and device id to identify an communicator.
 * @param[in] clientId The client id.
 * @param[in] deviceId The device id.
 * @return The concat result, i.e., npu id.
 */
inline std::string ConcatClientAndDeviceId(const std::string &clientId, int32_t deviceId)
{
    return clientId + ";" + std::to_string(deviceId);
}

inline std::tuple<std::string, int32_t> SplitNpuId(const std::string &npuId)
{
    size_t correctItemNum = 2;
    auto result = SplitToUniqueStr(npuId, ";");
    auto deviceId = -1;
    auto strIndex = result[0].size() > result[1].size() ? 0 : 1;
    if (result.size() == correctItemNum && StringToInt(result[1 - strIndex], deviceId)) {
        return std::make_tuple(result[strIndex], deviceId);
    }
    return std::make_tuple("", -1);
}

inline static std::string GetPeerId(const std::string &srcClientId, int32_t srcDeviceId, const std::string &dstCilentId,
                                    int32_t dstDeviceId)
{
    return srcClientId + ";" + std::to_string(srcDeviceId) + "---" + dstCilentId + ";" + std::to_string(dstDeviceId);
}

enum class MemcopyPolicy : int {
    DIRECT,
    FFTS,
    HUGE_FFTS,
};

inline Status GetNumberFromEnv(const char *key, uint64_t &value)
{
    auto strValue = std::getenv(key);
    RETURN_OK_IF_TRUE(strValue == nullptr);
    try {
        uint64_t ret = StrToUnsignedLong(strValue);
        if (ret == 0) {
            throw std::out_of_range("Memory should not be set to zero.");
        }
        value = ret;
    } catch (std::invalid_argument &invalidArgument) {
        RETURN_STATUS(StatusCode::K_RUNTIME_ERROR,
                      FormatString("Env %s value %s parse to number failed, invalid argument", key, strValue));
    } catch (std::out_of_range &outOfRange) {
        RETURN_STATUS(StatusCode::K_RUNTIME_ERROR,
                      FormatString("Env %s value %s parse to number failed, out of range", key, strValue));
    }
    return Status::OK();
}

inline Status GetPolicyFromEnv(const char *key, MemcopyPolicy &policy)
{
    auto strValue = std::getenv(key);
    RETURN_OK_IF_TRUE(strValue == nullptr);
    std::string str = strValue;
    if (str == "ffts") {
        policy = MemcopyPolicy::FFTS;
    } else if (str == "direct") {
        policy = MemcopyPolicy::DIRECT;
    } else if (str == "huge_ffts") {
        policy = MemcopyPolicy::HUGE_FFTS;
    } else {
        RETURN_STATUS(K_INVALID, FormatString("Unknown memcopy policy %s from env %s", str, key));
    }
    return Status::OK();
}

}  // namespace datasystem
#endif