// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// to you 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 "io/hdfs_builder.h"

#include <fmt/format.h>

#include <gen_cpp/PlanNodes_types.h>

#include <cstdarg>

#include <cstdlib>

#include <utility>

#include <vector>

#include "common/config.h"

#include "common/logging.h"

#ifdef USE_HADOOP_HDFS

#include "hadoop_hdfs/hdfs.h"

#endif

#include "io/fs/hdfs.h"

#include "util/string_util.h"

namespace doris {

#ifdef USE_HADOOP_HDFS

void err_log_message(const char* fmt, ...) {

    va_list args;

    va_start(args, fmt);

    // First, call vsnprintf to get the required buffer size

    int size = vsnprintf(nullptr, 0, fmt, args) + 1; // +1 for '\0'

    if (size <= 0) {

        LOG(ERROR) << "Error formatting log message, invalid size";

        va_end(args);

        return;

    }

    va_end(args);

    va_start(args, fmt); // Reinitialize va_list

    // Allocate a buffer and format the string into it

    std::vector<char> buffer(size);

    vsnprintf(buffer.data(), size, fmt, args);

    va_end(args);

    // Use glog to log the message

    LOG(ERROR) << buffer.data();

}

void va_err_log_message(const char* fmt, va_list ap) {

    va_list args_copy;

    va_copy(args_copy, ap);

    // Call vsnprintf to get the required buffer size

    int size = vsnprintf(nullptr, 0, fmt, args_copy) + 1; // +1 for '\0'

    va_end(args_copy);                                    // Release the copied va_list

    if (size <= 0) {

        LOG(ERROR) << "Error formatting log message, invalid size";

        return;

    }

    // Reinitialize va_list for the second vsnprintf call

    va_copy(args_copy, ap);

    // Allocate a buffer and format the string into it

    std::vector<char> buffer(size);

    vsnprintf(buffer.data(), size, fmt, args_copy);

    va_end(args_copy);

    // Use glog to log the message

    LOG(ERROR) << buffer.data();

}

struct hdfsLogger logger = {.errLogMessage = err_log_message,

                            .vaErrLogMessage = va_err_log_message};

#endif // #ifdef USE_HADOOP_HDFS

Status HDFSCommonBuilder::init_hdfs_builder() {

#ifdef USE_HADOOP_HDFS

    static std::once_flag flag;

    std::call_once(flag, []() { hdfsSetLogger(&logger); });

#endif // #ifdef USE_HADOOP_HDFS

    hdfs_builder = hdfsNewBuilder();

    if (hdfs_builder == nullptr) {

        LOG(INFO) << "failed to init HDFSCommonBuilder, please check check be/conf/hdfs-site.xml";

        return Status::InternalError(

                "failed to init HDFSCommonBuilder, please check check be/conf/hdfs-site.xml");

    }

    hdfsBuilderSetForceNewInstance(hdfs_builder);

    return Status::OK();

}

Status HDFSCommonBuilder::check_krb_params() {

    std::string ticket_path = doris::config::kerberos_ccache_path;

    if (!ticket_path.empty()) {

        hdfsBuilderConfSetStr(hdfs_builder, "hadoop.security.kerberos.ticket.cache.path",

                              ticket_path.c_str());

        return Status::OK();

    }

    // we should check hdfs_kerberos_principal and hdfs_kerberos_keytab nonnull to login kdc.

    if (hdfs_kerberos_principal.empty() || hdfs_kerberos_keytab.empty()) {

        return Status::InvalidArgument("Invalid hdfs_kerberos_principal or hdfs_kerberos_keytab");

    }

    // enable auto-renew thread

    hdfsBuilderConfSetStr(hdfs_builder, "hadoop.kerberos.keytab.login.autorenewal.enabled", "true");

    return Status::OK();

}

THdfsParams parse_properties(const std::map<std::string, std::string>& properties) {

    StringCaseMap<std::string> prop(properties.begin(), properties.end());

    std::vector<THdfsConf> hdfs_configs;

    THdfsParams hdfsParams;

    for (auto iter = prop.begin(); iter != prop.end();) {

        if (iter->first.compare(FS_KEY) == 0) {

            hdfsParams.__set_fs_name(iter->second);

            iter = prop.erase(iter);

        } else if (iter->first.compare(USER) == 0) {

            hdfsParams.__set_user(iter->second);

            iter = prop.erase(iter);

        } else if (iter->first.compare(KERBEROS_PRINCIPAL) == 0) {

            hdfsParams.__set_hdfs_kerberos_principal(iter->second);

            iter = prop.erase(iter);

        } else if (iter->first.compare(KERBEROS_KEYTAB) == 0) {

            hdfsParams.__set_hdfs_kerberos_keytab(iter->second);

            iter = prop.erase(iter);

        } else {

            THdfsConf item;

            item.key = iter->first;

            item.value = iter->second;

            hdfs_configs.push_back(item);

            iter = prop.erase(iter);

        }

    }

    if (!hdfsParams.__isset.user && std::getenv("HADOOP_USER_NAME") != nullptr) {

        hdfsParams.__set_user(std::getenv("HADOOP_USER_NAME"));

    }

    hdfsParams.__set_hdfs_conf(hdfs_configs);

    return hdfsParams;

}

Status create_hdfs_builder(const THdfsParams& hdfsParams, const std::string& fs_name,

                           HDFSCommonBuilder* builder) {

    RETURN_IF_ERROR(builder->init_hdfs_builder());

    hdfsBuilderSetNameNode(builder->get(), fs_name.c_str());

    // set kerberos conf

    if (hdfsParams.__isset.hdfs_kerberos_keytab) {

        builder->kerberos_login = true;

        builder->hdfs_kerberos_keytab = hdfsParams.hdfs_kerberos_keytab;

#ifdef USE_HADOOP_HDFS

        hdfsBuilderSetKerb5Conf(builder->get(), doris::config::kerberos_krb5_conf_path.c_str());

        hdfsBuilderSetKeyTabFile(builder->get(), hdfsParams.hdfs_kerberos_keytab.c_str());

#endif

    }

    if (hdfsParams.__isset.hdfs_kerberos_principal) {

        builder->kerberos_login = true;

        builder->hdfs_kerberos_principal = hdfsParams.hdfs_kerberos_principal;

        hdfsBuilderSetPrincipal(builder->get(), hdfsParams.hdfs_kerberos_principal.c_str());

    } else if (hdfsParams.__isset.user) {

        hdfsBuilderSetUserName(builder->get(), hdfsParams.user.c_str());

#ifdef USE_HADOOP_HDFS

        hdfsBuilderSetKerb5Conf(builder->get(), nullptr);

        hdfsBuilderSetKeyTabFile(builder->get(), nullptr);

#endif

    }

    // set other conf

    if (hdfsParams.__isset.hdfs_conf) {

        for (const THdfsConf& conf : hdfsParams.hdfs_conf) {

            hdfsBuilderConfSetStr(builder->get(), conf.key.c_str(), conf.value.c_str());

            LOG(INFO) << "set hdfs config: " << conf.key << ", value: " << conf.value;

#ifdef USE_HADOOP_HDFS

            // Set krb5.conf, we should define java.security.krb5.conf in catalog properties

            if (strcmp(conf.key.c_str(), "java.security.krb5.conf") == 0) {

                hdfsBuilderSetKerb5Conf(builder->get(), conf.value.c_str());

            }

#endif

        }

    }

    if (builder->is_kerberos()) {

        RETURN_IF_ERROR(builder->check_krb_params());

    }

    hdfsBuilderConfSetStr(builder->get(), "ipc.client.fallback-to-simple-auth-allowed", "true");

    return Status::OK();

}

Status create_hdfs_builder(const std::map<std::string, std::string>& properties,

                           HDFSCommonBuilder* builder) {

    THdfsParams hdfsParams = parse_properties(properties);

    return create_hdfs_builder(hdfsParams, hdfsParams.fs_name, builder);

}

} // namespace doris