// 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 "util/hdfs_util.h"

#include <ostream>

#include "common/logging.h"

#include "io/fs/err_utils.h"

#include "io/hdfs_builder.h"

namespace doris {

namespace io {

HDFSHandle& HDFSHandle::instance() {

    static HDFSHandle hdfs_handle;

    return hdfs_handle;

}

hdfsFS HDFSHandle::create_hdfs_fs(HDFSCommonBuilder& hdfs_builder) {

    hdfsFS hdfs_fs = hdfsBuilderConnect(hdfs_builder.get());

    if (hdfs_fs == nullptr) {

        LOG(WARNING) << "connect to hdfs failed."

                     << ", error: " << hdfs_error();

        return nullptr;

    }

    return hdfs_fs;

}

Path convert_path(const Path& path, const std::string& namenode) {

    std::string fs_path;

    if (path.native().starts_with(namenode)) {

        // `path` is URI format, remove the namenode part in `path`

        fs_path = path.native().substr(namenode.size());

    } else {

        fs_path = path;

    }

    // Always use absolute path (start with '/') in hdfs

    if (fs_path.empty() || fs_path[0] != '/') {

        fs_path.insert(fs_path.begin(), '/');

    }

    return fs_path;

}

bool is_hdfs(const std::string& path_or_fs) {

    return path_or_fs.rfind("hdfs://") == 0;

}

} // namespace io

} // namespace doris