// 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/s3_uri.h"

#include <absl/strings/ascii.h>

#include <absl/strings/str_split.h>

#include <vector>

namespace doris {

const std::string S3URI::_SCHEME_S3 = "s3";

const std::string S3URI::_SCHEME_HTTP = "http";

const std::string S3URI::_SCHEME_HTTPS = "https";

const std::string S3URI::_SCHEME_DELIM = "://";

const std::string S3URI::_PATH_DELIM = "/";

const std::string S3URI::_QUERY_DELIM = "?";

const std::string S3URI::_FRAGMENT_DELIM = "#";

/// eg:

///     s3://bucket1/path/to/file.txt

/// _schema: s3

/// _bucket: bucket1

/// _key:    path/to/file.txt

Status S3URI::parse() {

    if (_location.empty()) {

        return Status::InvalidArgument("location is empty");

    }

    std::vector<std::string> scheme_split = absl::StrSplit(_location, _SCHEME_DELIM);

    std::string rest;

    if (scheme_split.size() == 2) {

        if (scheme_split[0] == _SCHEME_S3) {

            // has scheme, eg: s3://bucket1/path/to/file.txt

            rest = scheme_split[1];

            std::vector<std::string> authority_split =

                    absl::StrSplit(rest, absl::MaxSplits(_PATH_DELIM, 1));

            if (authority_split.size() < 1) {

                return Status::InvalidArgument("Invalid S3 URI: {}", _location);

            }

            _bucket = authority_split[0];

            // support s3://bucket1

            _key = authority_split.size() == 1 ? "/" : authority_split[1];

        } else if (scheme_split[0] == _SCHEME_HTTP || scheme_split[0] == _SCHEME_HTTPS) {

            // has scheme, eg: http(s)://host/bucket1/path/to/file.txt

            rest = scheme_split[1];

            std::vector<std::string> authority_split =

                    absl::StrSplit(rest, absl::MaxSplits(_PATH_DELIM, 2));

            if (authority_split.size() != 3) {

                return Status::InvalidArgument("Invalid S3 HTTP URI: {}", _location);

            }

            // authority_split[1] is host

            _bucket = authority_split[1];

            _key = authority_split[2];

        } else {

            return Status::InvalidArgument("Invalid S3 URI: {}", _location);

        }

    } else if (scheme_split.size() == 1) {

        // no scheme, eg: path/to/file.txt

        _bucket = ""; // unknown

        _key = _location;

    } else {

        return Status::InvalidArgument("Invalid S3 URI: {}", _location);

    }

    absl::StripAsciiWhitespace(&_key);

    if (_key.empty()) {

        return Status::InvalidArgument("Invalid S3 key: {}", _location);

    }

    // Strip query and fragment if they exist

    std::vector<std::string> _query_split = absl::StrSplit(_key, _QUERY_DELIM);

    std::vector<std::string> _fragment_split = absl::StrSplit(_query_split[0], _FRAGMENT_DELIM);

    _key = _fragment_split[0];

    return Status::OK();

}

std::string S3URI::to_string() const {

    return _location;

}

} // end namespace doris