// 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/fs/http_file_system.h"

#include <fstream>

#include "common/status.h"

#include "io/fs/err_utils.h"

#include "io/fs/file_system.h"

#include "io/fs/file_writer.h"

#include "io/fs/http_file_reader.h"

#include "service/http/http_status.h"

namespace doris::io {

HttpFileSystem::HttpFileSystem(Path&& root_path, std::string id,

                               std::map<std::string, std::string> properties)

        : RemoteFileSystem(std::move(root_path), std::move(id), FileSystemType::HTTP),

          _properties(std::move(properties)) {}

Status HttpFileSystem::_init(const std::string& url) {

    _url = url;

    return Status::OK();

}

Result<std::shared_ptr<HttpFileSystem>> HttpFileSystem::create(

        std::string id, const std::string& url,

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

    Path root_path = "";

    std::shared_ptr<HttpFileSystem> fs(

            new HttpFileSystem(std::move(root_path), std::move(id), properties));

    RETURN_IF_ERROR_RESULT(fs->_init(url));

    return fs;

}

Status HttpFileSystem::open_file_internal(const Path& path, FileReaderSPtr* reader,

                                          const FileReaderOptions& opts) {

    OpenFileInfo file_info;

    file_info.path = path;

    // Pass properties (including HTTP headers) to the file reader

    file_info.extend_info = _properties;

    auto http_reader = std::make_shared<HttpFileReader>(file_info, path.native(), opts.mtime);

    RETURN_IF_ERROR(http_reader->open(opts));

    *reader = http_reader;

    return Status::OK();

}

Status HttpFileSystem::file_size_impl(const Path& file, int64_t* file_size) const {

    FileReaderOptions opts;

    FileReaderSPtr reader;

    RETURN_IF_ERROR(const_cast<HttpFileSystem*>(this)->open_file(file, &reader, &opts));

    *file_size = reader->size();

    RETURN_IF_ERROR(reader->close());

    return Status::OK();

}

Status HttpFileSystem::exists_impl(const Path& path, bool* res) const {

    FileReaderSPtr reader;

    auto st = const_cast<HttpFileSystem*>(this)->open_file(path, &reader);

    if (st.ok()) {

        *res = true;

        return Status::OK();

    } else if (st.code() == HttpStatus::NOT_FOUND) {

        *res = false;

        return Status::OK();

    } else {

        return st;

    }

}

} // namespace doris::io