// 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.

#pragma once

#include <aws/core/Aws.h>

#include <aws/core/client/ClientConfiguration.h>

#include <aws/s3/S3Errors.h>

#include <bvar/bvar.h>

#include <fmt/format.h>

#include <gen_cpp/AgentService_types.h>

#include <gen_cpp/cloud.pb.h>

#include <map>

#include <memory>

#include <mutex>

#include <string>

#include <unordered_map>

#include "common/status.h"

#include "cpp/s3_rate_limiter.h"

#include "io/fs/obj_storage_client.h"

#include "vec/common/string_ref.h"

namespace Aws::S3 {

class S3Client;

} // namespace Aws::S3

namespace bvar {

template <typename T>

class Adder;

}

namespace doris {

namespace s3_bvar {

extern bvar::LatencyRecorder s3_get_latency;

extern bvar::LatencyRecorder s3_put_latency;

extern bvar::LatencyRecorder s3_delete_object_latency;

extern bvar::LatencyRecorder s3_delete_objects_latency;

extern bvar::LatencyRecorder s3_head_latency;

extern bvar::LatencyRecorder s3_multi_part_upload_latency;

extern bvar::LatencyRecorder s3_list_latency;

extern bvar::LatencyRecorder s3_list_object_versions_latency;

extern bvar::LatencyRecorder s3_get_bucket_version_latency;

extern bvar::LatencyRecorder s3_copy_object_latency;

}; // namespace s3_bvar

class S3URI;

struct S3ClientConf {

    std::string endpoint;

    std::string region;

    std::string ak;

    std::string sk;

    std::string token;

    // For azure we'd better support the bucket at the first time init azure blob container client

    std::string bucket;

    io::ObjStorageType provider = io::ObjStorageType::AWS;

    int max_connections = -1;

    int request_timeout_ms = -1;

    int connect_timeout_ms = -1;

    bool use_virtual_addressing = true;

    uint64_t get_hash() const {

        uint64_t hash_code = 0;

        hash_code ^= crc32_hash(ak);

        hash_code ^= crc32_hash(sk);

        hash_code ^= crc32_hash(token);

        hash_code ^= crc32_hash(endpoint);

        hash_code ^= crc32_hash(region);

        hash_code ^= crc32_hash(bucket);

        hash_code ^= max_connections;

        hash_code ^= request_timeout_ms;

        hash_code ^= connect_timeout_ms;

        hash_code ^= use_virtual_addressing;

        hash_code ^= static_cast<int>(provider);

        return hash_code;

    }

    std::string to_string() const {

        return fmt::format(

                "(ak={}, token={}, endpoint={}, region={}, bucket={}, max_connections={}, "

                "request_timeout_ms={}, connect_timeout_ms={}, use_virtual_addressing={}",

                ak, token, endpoint, region, bucket, max_connections, request_timeout_ms,

                connect_timeout_ms, use_virtual_addressing);

    }

};

struct S3Conf {

    std::string bucket;

    std::string prefix;

    S3ClientConf client_conf;

    bool sse_enabled = false;

    static S3Conf get_s3_conf(const cloud::ObjectStoreInfoPB&);

    static S3Conf get_s3_conf(const TS3StorageParam&);

    std::string to_string() const {

        return fmt::format("(bucket={}, prefix={}, client_conf={}, sse_enabled={})", bucket, prefix,

                           client_conf.to_string(), sse_enabled);

    }

};

class S3ClientFactory {

public:

    ~S3ClientFactory();

    static S3ClientFactory& instance();

    std::shared_ptr<io::ObjStorageClient> create(const S3ClientConf& s3_conf);

    static Status convert_properties_to_s3_conf(const std::map<std::string, std::string>& prop,

                                                const S3URI& s3_uri, S3Conf* s3_conf);

    static Aws::Client::ClientConfiguration& getClientConfiguration() {

        // The default constructor of ClientConfiguration will do some http call

        // such as Aws::Internal::GetEC2MetadataClient and other init operation,

        // which is unnecessary.

        // So here we use a static instance, and deep copy every time

        // to avoid unnecessary operations.

        static Aws::Client::ClientConfiguration instance;

        return instance;

    }

    S3RateLimiterHolder* rate_limiter(S3RateLimitType type);

private:

    std::shared_ptr<io::ObjStorageClient> _create_s3_client(const S3ClientConf& s3_conf);

    std::shared_ptr<io::ObjStorageClient> _create_azure_client(const S3ClientConf& s3_conf);

    S3ClientFactory();

    static std::string get_valid_ca_cert_path();

    Aws::SDKOptions _aws_options;

    std::mutex _lock;

    std::unordered_map<uint64_t, std::shared_ptr<io::ObjStorageClient>> _cache;

    std::string _ca_cert_file_path;

    std::array<std::unique_ptr<S3RateLimiterHolder>, 2> _rate_limiters;

};

} // end namespace doris