// 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 "obj_retry_strategy.h"

#include <aws/core/http/HttpResponse.h>

#include <bvar/reducer.h>

#include <glog/logging.h>

namespace doris {

bvar::Adder<int64_t> object_request_retry_count("object_request_retry_count");

bvar::Adder<int64_t> s3_request_retry_too_many_requests_count(

        "s3_request_retry_too_many_requests_count");

bvar::Adder<int64_t> s3_request_failed_too_many_requests_count(

        "s3_request_failed_too_many_requests_count");

void record_object_request_failed(int http_code) {

    if (http_code == static_cast<int>(Aws::Http::HttpResponseCode::TOO_MANY_REQUESTS)) {

        s3_request_failed_too_many_requests_count << 1;

    }

}

S3CustomRetryStrategy::S3CustomRetryStrategy(int maxRetries, bool retry_slow_down)

        : DefaultRetryStrategy(maxRetries), _retry_slow_down(retry_slow_down) {}

S3CustomRetryStrategy::~S3CustomRetryStrategy() = default;

bool S3CustomRetryStrategy::ShouldRetry(const Aws::Client::AWSError<Aws::Client::CoreErrors>& error,

                                        long attemptedRetries) const {

    if (attemptedRetries >= m_maxRetries) {

        return false;

    }

    if (!_retry_slow_down && error.GetExceptionName() == "SlowDown" &&

        error.GetResponseCode() == Aws::Http::HttpResponseCode::SERVICE_UNAVAILABLE) {

        return false;

    }

    if (Aws::Http::IsRetryableHttpResponseCode(error.GetResponseCode()) || error.ShouldRetry()) {

        object_request_retry_count << 1;

        if (error.GetResponseCode() == Aws::Http::HttpResponseCode::TOO_MANY_REQUESTS) {

            s3_request_retry_too_many_requests_count << 1;

        }

        LOG(INFO) << "retry due to error: " << error << ", attempt: " << attemptedRetries + 1 << "/"

                  << m_maxRetries;

        return true;

    }

    return false;

}

#ifdef USE_AZURE

std::unique_ptr<Azure::Core::Http::RawResponse> AzureRetryRecordPolicy::Send(

        Azure::Core::Http::Request& request, Azure::Core::Http::Policies::NextHttpPolicy nextPolicy,

        Azure::Core::Context const& context) const {

    // https://learn.microsoft.com/en-us/azure/developer/cpp/sdk/fundamentals/http-pipelines-and-retries

    std::unique_ptr<Azure::Core::Http::RawResponse> response = nextPolicy.Send(request, context);

    int32_t retry_count =

            Azure::Core::Http::Policies::_internal::RetryPolicy::GetRetryCount(context);

    if (static_cast<int>(response->GetStatusCode()) > 299 ||

        static_cast<int>(response->GetStatusCode()) < 200) {

        if (retry_count > 0) {

            object_request_retry_count << 1;

            if (static_cast<int>(response->GetStatusCode()) ==

                static_cast<int>(Aws::Http::HttpResponseCode::TOO_MANY_REQUESTS)) {

                s3_request_retry_too_many_requests_count << 1;

            }

        }

        // If the response is not successful, we log the retry attempt and status code.

        LOG(INFO) << "azure retry retry_count: " << retry_count

                  << ", status code: " << static_cast<int>(response->GetStatusCode())

                  << ", reason: " << response->GetReasonPhrase();

    }

    return response;

}

std::unique_ptr<AzureRetryRecordPolicy::HttpPolicy> AzureRetryRecordPolicy::Clone() const {

    return std::make_unique<AzureRetryRecordPolicy>(*this);

}

#endif

} // namespace doris