// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
/**
 * Before running this C++ code example, set up your development environment, including your credentials.
 *
 * For more information, see the following documentation topic:
 *
 * https://docs.aws.amazon.com/sdk-for-cpp/v1/developer-guide/getting-started.html
 *
 * For information on the structure of the code examples and how to build and run the examples, see
 * https://docs.aws.amazon.com/sdk-for-cpp/v1/developer-guide/getting-started-code-examples.html.
 *
 **/

// snippet-start:[sqs.cpp.receive_message.inc]
#include <aws/core/Aws.h>
#include <aws/sqs/SQSClient.h>
#include <aws/sqs/model/ReceiveMessageRequest.h>
#include <iostream>
// snippet-end:[sqs.cpp.receive_message.inc]
#include "sqs_samples.h"

// snippet-start:[cpp.example_code.sqs.ReceiveMessage]
//! Receive a message from an Amazon Simple Queue Service (Amazon SQS) queue.
/*!
  \param queueUrl: An Amazon SQS queue URL.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::SQS::receiveMessage(const Aws::String &queueUrl,
                                 const Aws::Client::ClientConfiguration &clientConfiguration) {
    // snippet-start:[sqs.cpp.receive_message.code]
    Aws::SQS::SQSClient sqsClient(clientConfiguration);

    Aws::SQS::Model::ReceiveMessageRequest request;
    request.SetQueueUrl(queueUrl);
    request.SetMaxNumberOfMessages(1);

    const Aws::SQS::Model::ReceiveMessageOutcome outcome = sqsClient.ReceiveMessage(
            request);
    if (outcome.IsSuccess()) {

        const Aws::Vector<Aws::SQS::Model::Message> &messages =
                outcome.GetResult().GetMessages();
        if (!messages.empty()) {
            const Aws::SQS::Model::Message &message = messages[0];
            std::cout << "Received message:" << std::endl;
            std::cout << "  MessageId: " << message.GetMessageId() << std::endl;
            std::cout << "  ReceiptHandle: " << message.GetReceiptHandle() << std::endl;
            std::cout << "  Body: " << message.GetBody() << std::endl << std::endl;
        }
        else {
            std::cout << "No messages received from queue " << queueUrl <<
                      std::endl;

        }
    }
    else {
        std::cerr << "Error receiving message from queue " << queueUrl << ": "
                  << outcome.GetError().GetMessage() << std::endl;
    }
    // snippet-end:[sqs.cpp.receive_message.code]
    return outcome.IsSuccess();
}
// snippet-end:[cpp.example_code.sqs.ReceiveMessage]

/*
*
*  main function
*
*  Usage: 'run_receive_message <queue_url>'
*
*  Prerequisites: An existing Amazon SQS queue.
*
*/

#ifndef TESTING_BUILD

int main(int argc, char **argv) {
    if (argc != 2) {
        std::cout << "Usage: run_receive_message <queue_url>" << std::endl;
        return 1;
    }

    Aws::SDKOptions options;
    Aws::InitAPI(options);
    {
        Aws::String queue_url = argv[1];
        // snippet-start:[cpp.example_code.sqs.ReceiveMessage.config]
        Aws::Client::ClientConfiguration clientConfig;
        // Optional: Set to the AWS Region (overrides config file).
        // clientConfig.region = "us-east-1";
        // snippet-end:[cpp.example_code.sqs.ReceiveMessage.config]

        AwsDoc::SQS::receiveMessage(queue_url, clientConfig);
    }
    Aws::ShutdownAPI(options);
    return 0;
}

#endif // TESTING_BUILD