/*
 * Copyright (c) 2022-2023 Huawei Device Co., Ltd.
 * 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.
 */

#include "b_ohos/startup/backup_para.h"

#include <cstdint>
#include <memory>
#include <string>
#include <tuple>

#include "b_error/b_error.h"
#include "b_resources/b_constants.h"
#include "filemgmt_libhilog.h"
#include "parameter.h"

namespace OHOS::FileManagement::Backup {
using namespace std;

/**
 * @brief 获取配置参数的值
 *
 * @param key 配置参数的参数名
 * @param len 配置参数值的最大长度
 * @return 成功获取配置参数的值则返回true，失败则返回false；以及表示配置参数值的字符串
 */
static tuple<bool, string> GetConfigParameterValue(const string &key, uint32_t len)
{
    int handle = static_cast<int>(FindParameter(key.c_str()));
    if (handle == -1) {
        HILOGI("Fail to find parameter.");
        return {false, ""};
    }
    try {
        unique_ptr<char[]> buffer = make_unique<char[]>(len + 1);
        int res = GetParameterValue(handle, buffer.get(), len + 1);
        if (res < 0) {
            HILOGI("Fail to get parameter value.");
            return {false, ""};
        }
        return {true, buffer.get()};
    } catch (const bad_alloc &e) {
        HILOGI("Fail to get parameter value: %{public}s.", e.what());
        return {false, ""};
    }
}

bool BackupPara::GetBackupDebugOverrideExtensionConfig()
{
    auto [getCfgParaValSucc, value] = GetConfigParameterValue(BConstants::BACKUP_DEBUG_OVERRIDE_EXTENSION_CONFIG_KEY,
                                                              BConstants::BACKUP_PARA_VALUE_MAX);
    if (!getCfgParaValSucc) {
        throw BError(BError::Codes::SA_INVAL_ARG, "Fail to get configuration parameter value of backup.para");
    }
    return value == "true";
}

bool BackupPara::GetBackupOverrideBackupSARelease()
{
    auto [getCfgParaValSucc, value] =
        GetConfigParameterValue(BConstants::BACKUP_OVERRIDE_BACKUP_SA_RELEASE_KEY, BConstants::BACKUP_PARA_VALUE_MAX);
    if (!getCfgParaValSucc) {
        throw BError(BError::Codes::SA_INVAL_ARG, "Fail to get configuration parameter value of backup.para");
    }
    return value == "true";
}

bool BackupPara::GetBackupOverrideIncrementalRestore()
{
    auto [getCfgParaValSucc, value] =
        GetConfigParameterValue(BConstants::BACKUP_OVERRIDE_INCREMENTAL_KEY, BConstants::BACKUP_PARA_VALUE_MAX);
    if (!getCfgParaValSucc) {
        throw BError(BError::Codes::SA_INVAL_ARG, "Fail to get configuration parameter value of backup.para");
    }
    return value == "true";
}

tuple<bool, int32_t> BackupPara::GetBackupDebugOverrideAccount()
{
    auto [getCfgParaValSucc, value] = GetConfigParameterValue(BConstants::BACKUP_DEBUG_OVERRIDE_ACCOUNT_CONFIG_KEY,
                                                              BConstants::BACKUP_PARA_VALUE_MAX);
    if (!getCfgParaValSucc) {
        return {false, 0};
    }
    if (value == "true") {
        auto [getCfgParaValSucc, value] = GetConfigParameterValue(BConstants::BACKUP_DEBUG_OVERRIDE_ACCOUNT_NUMBER_KEY,
                                                                  BConstants::BACKUP_PARA_VALUE_MAX);
        if (!getCfgParaValSucc) {
            return {false, 0};
        }
        return {true, stoi(value)};
    }
    return {false, 0};
}
} // namespace OHOS::FileManagement::Backup