<?php
/**
 * ProductPricingApi
 * PHP version 7.3
 *
 * @category Class
 * @package  SellingPartnerApi
 */

/**
 * Selling Partner API for Pricing
 *
 * The Selling Partner API for Pricing helps you programmatically retrieve product pricing and offer information for Amazon Marketplace products.
 *
 * The version of the OpenAPI document: v0
 * 
 * Generated by: https://openapi-generator.tech
 * OpenAPI Generator version: 5.0.1
 */

/**
 * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
 * https://openapi-generator.tech
 * Do not edit the class manually.
 */

namespace SellingPartnerApi\Api;

use GuzzleHttp\Client;
use GuzzleHttp\ClientInterface;
use GuzzleHttp\Exception\RequestException;
use GuzzleHttp\Psr7\MultipartStream;
use GuzzleHttp\Psr7\Request;
use GuzzleHttp\RequestOptions;
use SellingPartnerApi\ApiException;
use SellingPartnerApi\Configuration;
use SellingPartnerApi\HeaderSelector;
use SellingPartnerApi\ObjectSerializer;

/**
 * ProductPricingApi Class Doc Comment
 *
 * @category Class
 * @package  SellingPartnerApi
 */
class ProductPricingApi
{
    /**
     * @var ClientInterface
     */
    protected $client;

    /**
     * @var Configuration
     */
    protected $config;

    /**
     * @var HeaderSelector
     */
    protected $headerSelector;

    /**
     * @var int Host index
     */
    protected $hostIndex;

    /**
     * @param Configuration   $config
     * @param ClientInterface $client
     * @param HeaderSelector  $selector
     * @param int             $hostIndex (Optional) host index to select the list of hosts if defined in the OpenAPI spec
     */
    public function __construct(
        Configuration $config,
        ClientInterface $client = null,
        HeaderSelector $selector = null,
        $hostIndex = 0
    ) {
        $this->client = $client ?: new Client();
        $this->config = $config;
        $this->headerSelector = $selector ?: new HeaderSelector($this->config);
        $this->hostIndex = $hostIndex;
    }

    /**
     * Set the host index
     *
     * @param int $hostIndex Host index (required)
     */
    public function setHostIndex($hostIndex)
    {
        $this->hostIndex = $hostIndex;
    }

    /**
     * Get the host index
     *
     * @return int Host index
     */
    public function getHostIndex()
    {
        return $this->hostIndex;
    }

    /**
     * @return Configuration
     */
    public function getConfig()
    {
        return $this->config;
    }

    /**
     * Operation getCompetitivePricing
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_type Indicates whether ASIN values or seller SKU values are used to identify items. If you specify Asin, the information in the response will be dependent on the list of Asins you provide in the Asins parameter. If you specify Sku, the information in the response will be dependent on the list of Skus you provide in the Skus parameter. Possible values: Asin, Sku. (required)
     * @param  string[] $asins A list of up to twenty Amazon Standard Identification Number (ASIN) values used to identify items in the given marketplace. (optional)
     * @param  string[] $skus A list of up to twenty seller SKU values used to identify items in the given marketplace. (optional)
     * @param  string $customer_type Indicates whether to request pricing information from the point of view of Consumer or Business buyers. Default is Consumer. (optional)
     *
     * @throws \SellingPartnerApi\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return \SellingPartnerApi\Model\ProductPricing\GetPricingResponse
     */
    public function getCompetitivePricing($marketplace_id, $item_type, $asins = null, $skus = null, $customer_type = null)
    {
        $response = $this->getCompetitivePricingWithHttpInfo($marketplace_id, $item_type, $asins, $skus, $customer_type);
        return $response;
    }

    /**
     * Operation getCompetitivePricingWithHttpInfo
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_type Indicates whether ASIN values or seller SKU values are used to identify items. If you specify Asin, the information in the response will be dependent on the list of Asins you provide in the Asins parameter. If you specify Sku, the information in the response will be dependent on the list of Skus you provide in the Skus parameter. Possible values: Asin, Sku. (required)
     * @param  string[] $asins A list of up to twenty Amazon Standard Identification Number (ASIN) values used to identify items in the given marketplace. (optional)
     * @param  string[] $skus A list of up to twenty seller SKU values used to identify items in the given marketplace. (optional)
     * @param  string $customer_type Indicates whether to request pricing information from the point of view of Consumer or Business buyers. Default is Consumer. (optional)
     *
     * @throws \SellingPartnerApi\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of \SellingPartnerApi\Model\ProductPricing\GetPricingResponse, HTTP status code, HTTP response headers (array of strings)
     */
    public function getCompetitivePricingWithHttpInfo($marketplace_id, $item_type, $asins = null, $skus = null, $customer_type = null)
    {
        $request = $this->getCompetitivePricingRequest($marketplace_id, $item_type, $asins, $skus, $customer_type);
        $signedRequest = $this->config->signRequest(
            $request
        );

        $this->writeDebug($signedRequest);
        $this->writeDebug((string) $signedRequest->getBody());

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($signedRequest, $options);
                $this->writeDebug($response);
                $this->writeDebug((string) $response->getBody());
            } catch (RequestException $e) {
                $hasResponse = !empty($e->hasResponse());
                $body = (string) ($hasResponse ? $e->getResponse()->getBody() : '[NULL response]');
                $this->writeDebug($e->getResponse());
                $this->writeDebug($body);
                throw new ApiException(
                    "[{$e->getCode()}] {$body}",
                    $e->getCode(),
                    $hasResponse ? $e->getResponse()->getHeaders() : [],
                    $body
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        $signedRequest->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    $response->getBody()->getContents()
                );
            }

            $responseBody = $response->getBody();
            switch($statusCode) {
                case 200:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 400:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 401:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 403:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 404:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 429:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 500:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 503:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
            }

            $returnType = '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse';
            $responseBody = $response->getBody();
            if ($returnType === '\SplFileObject') {
                $content = $responseBody; //stream goes to serializer
            } else {
                $content = (string) $responseBody;
            }

            return ObjectSerializer::deserialize($content, $returnType, $response->getHeaders());

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 401:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 403:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 404:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 429:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 503:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            $this->writeDebug($e);
            throw $e;
        }
    }

    /**
     * Operation getCompetitivePricingAsync
     *
     * 
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_type Indicates whether ASIN values or seller SKU values are used to identify items. If you specify Asin, the information in the response will be dependent on the list of Asins you provide in the Asins parameter. If you specify Sku, the information in the response will be dependent on the list of Skus you provide in the Skus parameter. Possible values: Asin, Sku. (required)
     * @param  string[] $asins A list of up to twenty Amazon Standard Identification Number (ASIN) values used to identify items in the given marketplace. (optional)
     * @param  string[] $skus A list of up to twenty seller SKU values used to identify items in the given marketplace. (optional)
     * @param  string $customer_type Indicates whether to request pricing information from the point of view of Consumer or Business buyers. Default is Consumer. (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getCompetitivePricingAsync($marketplace_id, $item_type, $asins = null, $skus = null, $customer_type = null)
    {
        return $this->getCompetitivePricingAsyncWithHttpInfo($marketplace_id, $item_type, $asins, $skus, $customer_type);;
    }

    /**
     * Operation getCompetitivePricingAsyncWithHttpInfo
     *
     * 
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_type Indicates whether ASIN values or seller SKU values are used to identify items. If you specify Asin, the information in the response will be dependent on the list of Asins you provide in the Asins parameter. If you specify Sku, the information in the response will be dependent on the list of Skus you provide in the Skus parameter. Possible values: Asin, Sku. (required)
     * @param  string[] $asins A list of up to twenty Amazon Standard Identification Number (ASIN) values used to identify items in the given marketplace. (optional)
     * @param  string[] $skus A list of up to twenty seller SKU values used to identify items in the given marketplace. (optional)
     * @param  string $customer_type Indicates whether to request pricing information from the point of view of Consumer or Business buyers. Default is Consumer. (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getCompetitivePricingAsyncWithHttpInfo($marketplace_id, $item_type, $asins = null, $skus = null, $customer_type = null)
    {
        $returnType = '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse';
        $request = $this->getCompetitivePricingRequest($marketplace_id, $item_type, $asins, $skus, $customer_type);
        $signedRequest = $this->config->signRequest(
            $request
        );

        $this->writeDebug($signedRequest);
        $this->writeDebug((string) $signedRequest->getBody());

        return $this->client
            ->sendAsync($signedRequest, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    $this->writeDebug($response);
                    $responseBody = $response->getBody();
                    if ($returnType === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, $returnType, $response->getHeaders());
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $hasResponse = !empty($response);
                    $body = (string) ($hasResponse ? $response->getBody() : '[NULL response]');
                    $this->writeDebug($response);
                    $statusCode = $hasResponse ? $response->getStatusCode() : $exception->getCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $hasResponse ? $response->getHeaders() : [],
                        $body
                    );
                }
            );
    }

    /**
     * Create request for operation 'getCompetitivePricing'
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_type Indicates whether ASIN values or seller SKU values are used to identify items. If you specify Asin, the information in the response will be dependent on the list of Asins you provide in the Asins parameter. If you specify Sku, the information in the response will be dependent on the list of Skus you provide in the Skus parameter. Possible values: Asin, Sku. (required)
     * @param  string[] $asins A list of up to twenty Amazon Standard Identification Number (ASIN) values used to identify items in the given marketplace. (optional)
     * @param  string[] $skus A list of up to twenty seller SKU values used to identify items in the given marketplace. (optional)
     * @param  string $customer_type Indicates whether to request pricing information from the point of view of Consumer or Business buyers. Default is Consumer. (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function getCompetitivePricingRequest($marketplace_id, $item_type, $asins = null, $skus = null, $customer_type = null)
    {
        // verify the required parameter 'marketplace_id' is set
        if ($marketplace_id === null || (is_array($marketplace_id) && count($marketplace_id) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $marketplace_id when calling getCompetitivePricing'
            );
        }
        // verify the required parameter 'item_type' is set
        if ($item_type === null || (is_array($item_type) && count($item_type) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $item_type when calling getCompetitivePricing'
            );
        }
        if ($asins !== null && count($asins) > 20) {
            throw new \InvalidArgumentException('invalid value for "$asins" when calling ProductPricingApi.getCompetitivePricing, number of items must be less than or equal to 20.');
        }

        if ($skus !== null && count($skus) > 20) {
            throw new \InvalidArgumentException('invalid value for "$skus" when calling ProductPricingApi.getCompetitivePricing, number of items must be less than or equal to 20.');
        }


        $resourcePath = '/products/pricing/v0/competitivePrice';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;

        // query params
        if (is_array($marketplace_id)) {
            $marketplace_id = ObjectSerializer::serializeCollection($marketplace_id, '', true);
        }
        if ($marketplace_id !== null) {
            $queryParams['MarketplaceId'] = $marketplace_id;
        }

        // query params
        if (is_array($asins)) {
            $asins = ObjectSerializer::serializeCollection($asins, 'form', true);
        }
        if ($asins !== null) {
            $queryParams['Asins'] = $asins;
        }

        // query params
        if (is_array($skus)) {
            $skus = ObjectSerializer::serializeCollection($skus, 'form', true);
        }
        if ($skus !== null) {
            $queryParams['Skus'] = $skus;
        }

        // query params
        if (is_array($item_type)) {
            $item_type = ObjectSerializer::serializeCollection($item_type, '', true);
        }
        if ($item_type !== null) {
            $queryParams['ItemType'] = $item_type;
        }

        // query params
        if (is_array($customer_type)) {
            $customer_type = ObjectSerializer::serializeCollection($customer_type, '', true);
        }
        if ($customer_type !== null) {
            $queryParams['CustomerType'] = $customer_type;
        }

        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/json'],
                []
            );
        }

        // for model (json/xml)
        if (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = \GuzzleHttp\Psr7\Query::build($formParams);
            }
        }


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = \GuzzleHttp\Psr7\Query::build($queryParams);
        return new Request(
            'GET',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Operation getItemOffers
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_condition Filters the offer listings to be considered based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (required)
     * @param  string $asin The Amazon Standard Identification Number (ASIN) of the item. (required)
     * @param  string $customer_type Indicates whether to request Consumer or Business offers. Default is Consumer. (optional)
     *
     * @throws \SellingPartnerApi\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return \SellingPartnerApi\Model\ProductPricing\GetOffersResponse
     */
    public function getItemOffers($marketplace_id, $item_condition, $asin, $customer_type = null)
    {
        $response = $this->getItemOffersWithHttpInfo($marketplace_id, $item_condition, $asin, $customer_type);
        return $response;
    }

    /**
     * Operation getItemOffersWithHttpInfo
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_condition Filters the offer listings to be considered based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (required)
     * @param  string $asin The Amazon Standard Identification Number (ASIN) of the item. (required)
     * @param  string $customer_type Indicates whether to request Consumer or Business offers. Default is Consumer. (optional)
     *
     * @throws \SellingPartnerApi\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of \SellingPartnerApi\Model\ProductPricing\GetOffersResponse, HTTP status code, HTTP response headers (array of strings)
     */
    public function getItemOffersWithHttpInfo($marketplace_id, $item_condition, $asin, $customer_type = null)
    {
        $request = $this->getItemOffersRequest($marketplace_id, $item_condition, $asin, $customer_type);
        $signedRequest = $this->config->signRequest(
            $request
        );

        $this->writeDebug($signedRequest);
        $this->writeDebug((string) $signedRequest->getBody());

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($signedRequest, $options);
                $this->writeDebug($response);
                $this->writeDebug((string) $response->getBody());
            } catch (RequestException $e) {
                $hasResponse = !empty($e->hasResponse());
                $body = (string) ($hasResponse ? $e->getResponse()->getBody() : '[NULL response]');
                $this->writeDebug($e->getResponse());
                $this->writeDebug($body);
                throw new ApiException(
                    "[{$e->getCode()}] {$body}",
                    $e->getCode(),
                    $hasResponse ? $e->getResponse()->getHeaders() : [],
                    $body
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        $signedRequest->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    $response->getBody()->getContents()
                );
            }

            $responseBody = $response->getBody();
            switch($statusCode) {
                case 200:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 400:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 401:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 403:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 404:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 429:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 500:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 503:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
            }

            $returnType = '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse';
            $responseBody = $response->getBody();
            if ($returnType === '\SplFileObject') {
                $content = $responseBody; //stream goes to serializer
            } else {
                $content = (string) $responseBody;
            }

            return ObjectSerializer::deserialize($content, $returnType, $response->getHeaders());

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 401:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 403:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 404:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 429:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 503:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            $this->writeDebug($e);
            throw $e;
        }
    }

    /**
     * Operation getItemOffersAsync
     *
     * 
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_condition Filters the offer listings to be considered based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (required)
     * @param  string $asin The Amazon Standard Identification Number (ASIN) of the item. (required)
     * @param  string $customer_type Indicates whether to request Consumer or Business offers. Default is Consumer. (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getItemOffersAsync($marketplace_id, $item_condition, $asin, $customer_type = null)
    {
        return $this->getItemOffersAsyncWithHttpInfo($marketplace_id, $item_condition, $asin, $customer_type);;
    }

    /**
     * Operation getItemOffersAsyncWithHttpInfo
     *
     * 
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_condition Filters the offer listings to be considered based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (required)
     * @param  string $asin The Amazon Standard Identification Number (ASIN) of the item. (required)
     * @param  string $customer_type Indicates whether to request Consumer or Business offers. Default is Consumer. (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getItemOffersAsyncWithHttpInfo($marketplace_id, $item_condition, $asin, $customer_type = null)
    {
        $returnType = '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse';
        $request = $this->getItemOffersRequest($marketplace_id, $item_condition, $asin, $customer_type);
        $signedRequest = $this->config->signRequest(
            $request
        );

        $this->writeDebug($signedRequest);
        $this->writeDebug((string) $signedRequest->getBody());

        return $this->client
            ->sendAsync($signedRequest, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    $this->writeDebug($response);
                    $responseBody = $response->getBody();
                    if ($returnType === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, $returnType, $response->getHeaders());
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $hasResponse = !empty($response);
                    $body = (string) ($hasResponse ? $response->getBody() : '[NULL response]');
                    $this->writeDebug($response);
                    $statusCode = $hasResponse ? $response->getStatusCode() : $exception->getCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $hasResponse ? $response->getHeaders() : [],
                        $body
                    );
                }
            );
    }

    /**
     * Create request for operation 'getItemOffers'
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_condition Filters the offer listings to be considered based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (required)
     * @param  string $asin The Amazon Standard Identification Number (ASIN) of the item. (required)
     * @param  string $customer_type Indicates whether to request Consumer or Business offers. Default is Consumer. (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function getItemOffersRequest($marketplace_id, $item_condition, $asin, $customer_type = null)
    {
        // verify the required parameter 'marketplace_id' is set
        if ($marketplace_id === null || (is_array($marketplace_id) && count($marketplace_id) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $marketplace_id when calling getItemOffers'
            );
        }
        // verify the required parameter 'item_condition' is set
        if ($item_condition === null || (is_array($item_condition) && count($item_condition) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $item_condition when calling getItemOffers'
            );
        }
        // verify the required parameter 'asin' is set
        if ($asin === null || (is_array($asin) && count($asin) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $asin when calling getItemOffers'
            );
        }

        $resourcePath = '/products/pricing/v0/items/{Asin}/offers';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;

        // query params
        if (is_array($marketplace_id)) {
            $marketplace_id = ObjectSerializer::serializeCollection($marketplace_id, '', true);
        }
        if ($marketplace_id !== null) {
            $queryParams['MarketplaceId'] = $marketplace_id;
        }

        // query params
        if (is_array($item_condition)) {
            $item_condition = ObjectSerializer::serializeCollection($item_condition, '', true);
        }
        if ($item_condition !== null) {
            $queryParams['ItemCondition'] = $item_condition;
        }

        // query params
        if (is_array($customer_type)) {
            $customer_type = ObjectSerializer::serializeCollection($customer_type, '', true);
        }
        if ($customer_type !== null) {
            $queryParams['CustomerType'] = $customer_type;
        }

        // path params
        if ($asin !== null) {
            $resourcePath = str_replace(
                '{' . 'Asin' . '}',
                ObjectSerializer::toPathValue($asin),
                $resourcePath
            );
        }

        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/json'],
                []
            );
        }

        // for model (json/xml)
        if (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = \GuzzleHttp\Psr7\Query::build($formParams);
            }
        }


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = \GuzzleHttp\Psr7\Query::build($queryParams);
        return new Request(
            'GET',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Operation getListingOffers
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_condition Filters the offer listings based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (required)
     * @param  string $seller_sku Identifies an item in the given marketplace. SellerSKU is qualified by the seller&#39;s SellerId, which is included with every operation that you submit. (required)
     * @param  string $customer_type Indicates whether to request Consumer or Business offers. Default is Consumer. (optional)
     *
     * @throws \SellingPartnerApi\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return \SellingPartnerApi\Model\ProductPricing\GetOffersResponse
     */
    public function getListingOffers($marketplace_id, $item_condition, $seller_sku, $customer_type = null)
    {
        $response = $this->getListingOffersWithHttpInfo($marketplace_id, $item_condition, $seller_sku, $customer_type);
        return $response;
    }

    /**
     * Operation getListingOffersWithHttpInfo
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_condition Filters the offer listings based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (required)
     * @param  string $seller_sku Identifies an item in the given marketplace. SellerSKU is qualified by the seller&#39;s SellerId, which is included with every operation that you submit. (required)
     * @param  string $customer_type Indicates whether to request Consumer or Business offers. Default is Consumer. (optional)
     *
     * @throws \SellingPartnerApi\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of \SellingPartnerApi\Model\ProductPricing\GetOffersResponse, HTTP status code, HTTP response headers (array of strings)
     */
    public function getListingOffersWithHttpInfo($marketplace_id, $item_condition, $seller_sku, $customer_type = null)
    {
        $request = $this->getListingOffersRequest($marketplace_id, $item_condition, $seller_sku, $customer_type);
        $signedRequest = $this->config->signRequest(
            $request
        );

        $this->writeDebug($signedRequest);
        $this->writeDebug((string) $signedRequest->getBody());

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($signedRequest, $options);
                $this->writeDebug($response);
                $this->writeDebug((string) $response->getBody());
            } catch (RequestException $e) {
                $hasResponse = !empty($e->hasResponse());
                $body = (string) ($hasResponse ? $e->getResponse()->getBody() : '[NULL response]');
                $this->writeDebug($e->getResponse());
                $this->writeDebug($body);
                throw new ApiException(
                    "[{$e->getCode()}] {$body}",
                    $e->getCode(),
                    $hasResponse ? $e->getResponse()->getHeaders() : [],
                    $body
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        $signedRequest->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    $response->getBody()->getContents()
                );
            }

            $responseBody = $response->getBody();
            switch($statusCode) {
                case 200:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 400:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 401:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 403:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 404:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 429:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 500:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
                case 503:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetOffersResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse', $response->getHeaders());
            }

            $returnType = '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse';
            $responseBody = $response->getBody();
            if ($returnType === '\SplFileObject') {
                $content = $responseBody; //stream goes to serializer
            } else {
                $content = (string) $responseBody;
            }

            return ObjectSerializer::deserialize($content, $returnType, $response->getHeaders());

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 401:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 403:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 404:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 429:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 503:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            $this->writeDebug($e);
            throw $e;
        }
    }

    /**
     * Operation getListingOffersAsync
     *
     * 
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_condition Filters the offer listings based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (required)
     * @param  string $seller_sku Identifies an item in the given marketplace. SellerSKU is qualified by the seller&#39;s SellerId, which is included with every operation that you submit. (required)
     * @param  string $customer_type Indicates whether to request Consumer or Business offers. Default is Consumer. (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getListingOffersAsync($marketplace_id, $item_condition, $seller_sku, $customer_type = null)
    {
        return $this->getListingOffersAsyncWithHttpInfo($marketplace_id, $item_condition, $seller_sku, $customer_type);;
    }

    /**
     * Operation getListingOffersAsyncWithHttpInfo
     *
     * 
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_condition Filters the offer listings based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (required)
     * @param  string $seller_sku Identifies an item in the given marketplace. SellerSKU is qualified by the seller&#39;s SellerId, which is included with every operation that you submit. (required)
     * @param  string $customer_type Indicates whether to request Consumer or Business offers. Default is Consumer. (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getListingOffersAsyncWithHttpInfo($marketplace_id, $item_condition, $seller_sku, $customer_type = null)
    {
        $returnType = '\SellingPartnerApi\Model\ProductPricing\GetOffersResponse';
        $request = $this->getListingOffersRequest($marketplace_id, $item_condition, $seller_sku, $customer_type);
        $signedRequest = $this->config->signRequest(
            $request
        );

        $this->writeDebug($signedRequest);
        $this->writeDebug((string) $signedRequest->getBody());

        return $this->client
            ->sendAsync($signedRequest, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    $this->writeDebug($response);
                    $responseBody = $response->getBody();
                    if ($returnType === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, $returnType, $response->getHeaders());
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $hasResponse = !empty($response);
                    $body = (string) ($hasResponse ? $response->getBody() : '[NULL response]');
                    $this->writeDebug($response);
                    $statusCode = $hasResponse ? $response->getStatusCode() : $exception->getCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $hasResponse ? $response->getHeaders() : [],
                        $body
                    );
                }
            );
    }

    /**
     * Create request for operation 'getListingOffers'
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_condition Filters the offer listings based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (required)
     * @param  string $seller_sku Identifies an item in the given marketplace. SellerSKU is qualified by the seller&#39;s SellerId, which is included with every operation that you submit. (required)
     * @param  string $customer_type Indicates whether to request Consumer or Business offers. Default is Consumer. (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function getListingOffersRequest($marketplace_id, $item_condition, $seller_sku, $customer_type = null)
    {
        // verify the required parameter 'marketplace_id' is set
        if ($marketplace_id === null || (is_array($marketplace_id) && count($marketplace_id) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $marketplace_id when calling getListingOffers'
            );
        }
        // verify the required parameter 'item_condition' is set
        if ($item_condition === null || (is_array($item_condition) && count($item_condition) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $item_condition when calling getListingOffers'
            );
        }
        // verify the required parameter 'seller_sku' is set
        if ($seller_sku === null || (is_array($seller_sku) && count($seller_sku) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $seller_sku when calling getListingOffers'
            );
        }

        $resourcePath = '/products/pricing/v0/listings/{SellerSKU}/offers';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;

        // query params
        if (is_array($marketplace_id)) {
            $marketplace_id = ObjectSerializer::serializeCollection($marketplace_id, '', true);
        }
        if ($marketplace_id !== null) {
            $queryParams['MarketplaceId'] = $marketplace_id;
        }

        // query params
        if (is_array($item_condition)) {
            $item_condition = ObjectSerializer::serializeCollection($item_condition, '', true);
        }
        if ($item_condition !== null) {
            $queryParams['ItemCondition'] = $item_condition;
        }

        // query params
        if (is_array($customer_type)) {
            $customer_type = ObjectSerializer::serializeCollection($customer_type, '', true);
        }
        if ($customer_type !== null) {
            $queryParams['CustomerType'] = $customer_type;
        }

        // path params
        if ($seller_sku !== null) {
            $resourcePath = str_replace(
                '{' . 'SellerSKU' . '}',
                ObjectSerializer::toPathValue($seller_sku),
                $resourcePath
            );
        }

        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/json'],
                []
            );
        }

        // for model (json/xml)
        if (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = \GuzzleHttp\Psr7\Query::build($formParams);
            }
        }


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = \GuzzleHttp\Psr7\Query::build($queryParams);
        return new Request(
            'GET',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Operation getPricing
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_type Indicates whether ASIN values or seller SKU values are used to identify items. If you specify Asin, the information in the response will be dependent on the list of Asins you provide in the Asins parameter. If you specify Sku, the information in the response will be dependent on the list of Skus you provide in the Skus parameter. (required)
     * @param  string[] $asins A list of up to twenty Amazon Standard Identification Number (ASIN) values used to identify items in the given marketplace. (optional)
     * @param  string[] $skus A list of up to twenty seller SKU values used to identify items in the given marketplace. (optional)
     * @param  string $item_condition Filters the offer listings based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (optional)
     * @param  string $offer_type Indicates whether to request pricing information for the seller&#39;s B2C or B2B offers. Default is B2C. (optional)
     *
     * @throws \SellingPartnerApi\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return \SellingPartnerApi\Model\ProductPricing\GetPricingResponse
     */
    public function getPricing($marketplace_id, $item_type, $asins = null, $skus = null, $item_condition = null, $offer_type = null)
    {
        $response = $this->getPricingWithHttpInfo($marketplace_id, $item_type, $asins, $skus, $item_condition, $offer_type);
        return $response;
    }

    /**
     * Operation getPricingWithHttpInfo
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_type Indicates whether ASIN values or seller SKU values are used to identify items. If you specify Asin, the information in the response will be dependent on the list of Asins you provide in the Asins parameter. If you specify Sku, the information in the response will be dependent on the list of Skus you provide in the Skus parameter. (required)
     * @param  string[] $asins A list of up to twenty Amazon Standard Identification Number (ASIN) values used to identify items in the given marketplace. (optional)
     * @param  string[] $skus A list of up to twenty seller SKU values used to identify items in the given marketplace. (optional)
     * @param  string $item_condition Filters the offer listings based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (optional)
     * @param  string $offer_type Indicates whether to request pricing information for the seller&#39;s B2C or B2B offers. Default is B2C. (optional)
     *
     * @throws \SellingPartnerApi\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of \SellingPartnerApi\Model\ProductPricing\GetPricingResponse, HTTP status code, HTTP response headers (array of strings)
     */
    public function getPricingWithHttpInfo($marketplace_id, $item_type, $asins = null, $skus = null, $item_condition = null, $offer_type = null)
    {
        $request = $this->getPricingRequest($marketplace_id, $item_type, $asins, $skus, $item_condition, $offer_type);
        $signedRequest = $this->config->signRequest(
            $request
        );

        $this->writeDebug($signedRequest);
        $this->writeDebug((string) $signedRequest->getBody());

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($signedRequest, $options);
                $this->writeDebug($response);
                $this->writeDebug((string) $response->getBody());
            } catch (RequestException $e) {
                $hasResponse = !empty($e->hasResponse());
                $body = (string) ($hasResponse ? $e->getResponse()->getBody() : '[NULL response]');
                $this->writeDebug($e->getResponse());
                $this->writeDebug($body);
                throw new ApiException(
                    "[{$e->getCode()}] {$body}",
                    $e->getCode(),
                    $hasResponse ? $e->getResponse()->getHeaders() : [],
                    $body
                );
            }

            $statusCode = $response->getStatusCode();

            if ($statusCode < 200 || $statusCode > 299) {
                throw new ApiException(
                    sprintf(
                        '[%d] Error connecting to the API (%s)',
                        $statusCode,
                        $signedRequest->getUri()
                    ),
                    $statusCode,
                    $response->getHeaders(),
                    $response->getBody()->getContents()
                );
            }

            $responseBody = $response->getBody();
            switch($statusCode) {
                case 200:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 400:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 401:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 403:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 404:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 429:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 500:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
                case 503:
                    if ('\SellingPartnerApi\Model\ProductPricing\GetPricingResponse' === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse', $response->getHeaders());
            }

            $returnType = '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse';
            $responseBody = $response->getBody();
            if ($returnType === '\SplFileObject') {
                $content = $responseBody; //stream goes to serializer
            } else {
                $content = (string) $responseBody;
            }

            return ObjectSerializer::deserialize($content, $returnType, $response->getHeaders());

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 401:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 403:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 404:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 429:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 500:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 503:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            $this->writeDebug($e);
            throw $e;
        }
    }

    /**
     * Operation getPricingAsync
     *
     * 
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_type Indicates whether ASIN values or seller SKU values are used to identify items. If you specify Asin, the information in the response will be dependent on the list of Asins you provide in the Asins parameter. If you specify Sku, the information in the response will be dependent on the list of Skus you provide in the Skus parameter. (required)
     * @param  string[] $asins A list of up to twenty Amazon Standard Identification Number (ASIN) values used to identify items in the given marketplace. (optional)
     * @param  string[] $skus A list of up to twenty seller SKU values used to identify items in the given marketplace. (optional)
     * @param  string $item_condition Filters the offer listings based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (optional)
     * @param  string $offer_type Indicates whether to request pricing information for the seller&#39;s B2C or B2B offers. Default is B2C. (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getPricingAsync($marketplace_id, $item_type, $asins = null, $skus = null, $item_condition = null, $offer_type = null)
    {
        return $this->getPricingAsyncWithHttpInfo($marketplace_id, $item_type, $asins, $skus, $item_condition, $offer_type);;
    }

    /**
     * Operation getPricingAsyncWithHttpInfo
     *
     * 
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_type Indicates whether ASIN values or seller SKU values are used to identify items. If you specify Asin, the information in the response will be dependent on the list of Asins you provide in the Asins parameter. If you specify Sku, the information in the response will be dependent on the list of Skus you provide in the Skus parameter. (required)
     * @param  string[] $asins A list of up to twenty Amazon Standard Identification Number (ASIN) values used to identify items in the given marketplace. (optional)
     * @param  string[] $skus A list of up to twenty seller SKU values used to identify items in the given marketplace. (optional)
     * @param  string $item_condition Filters the offer listings based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (optional)
     * @param  string $offer_type Indicates whether to request pricing information for the seller&#39;s B2C or B2B offers. Default is B2C. (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function getPricingAsyncWithHttpInfo($marketplace_id, $item_type, $asins = null, $skus = null, $item_condition = null, $offer_type = null)
    {
        $returnType = '\SellingPartnerApi\Model\ProductPricing\GetPricingResponse';
        $request = $this->getPricingRequest($marketplace_id, $item_type, $asins, $skus, $item_condition, $offer_type);
        $signedRequest = $this->config->signRequest(
            $request
        );

        $this->writeDebug($signedRequest);
        $this->writeDebug((string) $signedRequest->getBody());

        return $this->client
            ->sendAsync($signedRequest, $this->createHttpClientOption())
            ->then(
                function ($response) use ($returnType) {
                    $this->writeDebug($response);
                    $responseBody = $response->getBody();
                    if ($returnType === '\SplFileObject') {
                        $content = $responseBody; //stream goes to serializer
                    } else {
                        $content = (string) $responseBody;
                    }

                    return ObjectSerializer::deserialize($content, $returnType, $response->getHeaders());
                },
                function ($exception) {
                    $response = $exception->getResponse();
                    $hasResponse = !empty($response);
                    $body = (string) ($hasResponse ? $response->getBody() : '[NULL response]');
                    $this->writeDebug($response);
                    $statusCode = $hasResponse ? $response->getStatusCode() : $exception->getCode();
                    throw new ApiException(
                        sprintf(
                            '[%d] Error connecting to the API (%s)',
                            $statusCode,
                            $exception->getRequest()->getUri()
                        ),
                        $statusCode,
                        $hasResponse ? $response->getHeaders() : [],
                        $body
                    );
                }
            );
    }

    /**
     * Create request for operation 'getPricing'
     *
     * @param  string $marketplace_id A marketplace identifier. Specifies the marketplace for which prices are returned. (required)
     * @param  string $item_type Indicates whether ASIN values or seller SKU values are used to identify items. If you specify Asin, the information in the response will be dependent on the list of Asins you provide in the Asins parameter. If you specify Sku, the information in the response will be dependent on the list of Skus you provide in the Skus parameter. (required)
     * @param  string[] $asins A list of up to twenty Amazon Standard Identification Number (ASIN) values used to identify items in the given marketplace. (optional)
     * @param  string[] $skus A list of up to twenty seller SKU values used to identify items in the given marketplace. (optional)
     * @param  string $item_condition Filters the offer listings based on item condition. Possible values: New, Used, Collectible, Refurbished, Club. (optional)
     * @param  string $offer_type Indicates whether to request pricing information for the seller&#39;s B2C or B2B offers. Default is B2C. (optional)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    public function getPricingRequest($marketplace_id, $item_type, $asins = null, $skus = null, $item_condition = null, $offer_type = null)
    {
        // verify the required parameter 'marketplace_id' is set
        if ($marketplace_id === null || (is_array($marketplace_id) && count($marketplace_id) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $marketplace_id when calling getPricing'
            );
        }
        // verify the required parameter 'item_type' is set
        if ($item_type === null || (is_array($item_type) && count($item_type) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $item_type when calling getPricing'
            );
        }
        if ($asins !== null && count($asins) > 20) {
            throw new \InvalidArgumentException('invalid value for "$asins" when calling ProductPricingApi.getPricing, number of items must be less than or equal to 20.');
        }

        if ($skus !== null && count($skus) > 20) {
            throw new \InvalidArgumentException('invalid value for "$skus" when calling ProductPricingApi.getPricing, number of items must be less than or equal to 20.');
        }


        $resourcePath = '/products/pricing/v0/price';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;

        // query params
        if (is_array($marketplace_id)) {
            $marketplace_id = ObjectSerializer::serializeCollection($marketplace_id, '', true);
        }
        if ($marketplace_id !== null) {
            $queryParams['MarketplaceId'] = $marketplace_id;
        }

        // query params
        if (is_array($asins)) {
            $asins = ObjectSerializer::serializeCollection($asins, 'form', true);
        }
        if ($asins !== null) {
            $queryParams['Asins'] = $asins;
        }

        // query params
        if (is_array($skus)) {
            $skus = ObjectSerializer::serializeCollection($skus, 'form', true);
        }
        if ($skus !== null) {
            $queryParams['Skus'] = $skus;
        }

        // query params
        if (is_array($item_type)) {
            $item_type = ObjectSerializer::serializeCollection($item_type, '', true);
        }
        if ($item_type !== null) {
            $queryParams['ItemType'] = $item_type;
        }

        // query params
        if (is_array($item_condition)) {
            $item_condition = ObjectSerializer::serializeCollection($item_condition, '', true);
        }
        if ($item_condition !== null) {
            $queryParams['ItemCondition'] = $item_condition;
        }

        // query params
        if (is_array($offer_type)) {
            $offer_type = ObjectSerializer::serializeCollection($offer_type, '', true);
        }
        if ($offer_type !== null) {
            $queryParams['OfferType'] = $offer_type;
        }

        if ($multipart) {
            $headers = $this->headerSelector->selectHeadersForMultipart(
                ['application/json']
            );
        } else {
            $headers = $this->headerSelector->selectHeaders(
                ['application/json'],
                []
            );
        }

        // for model (json/xml)
        if (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $formParamValueItems = is_array($formParamValue) ? $formParamValue : [$formParamValue];
                    foreach ($formParamValueItems as $formParamValueItem) {
                        $multipartContents[] = [
                            'name' => $formParamName,
                            'contents' => $formParamValueItem
                        ];
                    }
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

            } elseif ($headers['Content-Type'] === 'application/json') {
                $httpBody = \GuzzleHttp\json_encode($formParams);

            } else {
                // for HTTP post (form)
                $httpBody = \GuzzleHttp\Psr7\Query::build($formParams);
            }
        }


        $defaultHeaders = [];
        if ($this->config->getUserAgent()) {
            $defaultHeaders['User-Agent'] = $this->config->getUserAgent();
        }

        $headers = array_merge(
            $defaultHeaders,
            $headerParams,
            $headers
        );

        $query = \GuzzleHttp\Psr7\Query::build($queryParams);
        return new Request(
            'GET',
            $this->config->getHost() . $resourcePath . ($query ? "?{$query}" : ''),
            $headers,
            $httpBody
        );
    }

    /**
     * Create http client option
     *
     * @throws \RuntimeException on file opening failure
     * @return array of http client options
     */
    protected function createHttpClientOption()
    {
        $options = [];
        if ($this->config->getDebug()) {
            $options[RequestOptions::DEBUG] = fopen($this->config->getDebugFile(), 'a');
            if (!$options[RequestOptions::DEBUG]) {
                throw new \RuntimeException('Failed to open the debug file: ' . $this->config->getDebugFile());
            }
        }

        return $options;
    }

    /**
     * Writes to the debug log file
     *
     * @param any $data
     * @return void
     */
    private function writeDebug($data)
    {
        if ($this->config->getDebug()) {
            file_put_contents($this->config->getDebugFile(), '[' . date('Y-m-d H:i:s') . ']: ' . print_r($data, true) . "\n", FILE_APPEND);
        }
    }
}
