// 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