<?php
/**
 * PostLetterApi
 * PHP version 5
 *
 * @category Class
 * @package  ClickSend
 * @author   ClickSend Codegen team
 * @link     https://github.com/swagger-api/swagger-codegen
 */

/**
 * ClickSend v3 API
 *
 * This is an official SDK for [ClickSend](https://clicksend.com)  Below you will find a current list of the available methods for clicksend.  *NOTE: You will need to create a free account to use the API. You can register [here](https://dashboard.clicksend.com/#/signup/step1/)..*
 *
 * OpenAPI spec version: 3.1
 * Contact: support@clicksend.com
 * Generated by: https://github.com/swagger-api/swagger-codegen.git
 * ClickSend Codegen version: 2.4.16-SNAPSHOT
 */

/**
 * NOTE: This class is auto generated by the swagger code generator program.
 * https://github.com/swagger-api/swagger-codegen
 * Do not edit the class manually.
 */

namespace ClickSend\Api;

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

/**
 * PostLetterApi Class Doc Comment
 *
 * @category Class
 * @package  ClickSend
 * @author   ClickSend Codegen team
 * @link     https://github.com/swagger-api/swagger-codegen
 */
class PostLetterApi
{
    /**
     * @var ClientInterface
     */
    protected $client;

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

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

    /**
     * @param ClientInterface $client
     * @param Configuration   $config
     * @param HeaderSelector  $selector
     */
    public function __construct(
        ClientInterface $client = null,
        Configuration $config = null,
        HeaderSelector $selector = null
    ) {
        $this->client = $client ?: new Client();
        $this->config = $config ?: new Configuration();
        $this->headerSelector = $selector ?: new HeaderSelector();
    }

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

    /**
     * Operation postLettersExportGet
     *
     * export post letter history
     *
     * @param  string $filename Filename to export to (required)
     *
     * @throws \ClickSend\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return string
     */
    public function postLettersExportGet($filename)
    {
        list($response) = $this->postLettersExportGetWithHttpInfo($filename);
        return $response;
    }

    /**
     * Operation postLettersExportGetWithHttpInfo
     *
     * export post letter history
     *
     * @param  string $filename Filename to export to (required)
     *
     * @throws \ClickSend\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of string, HTTP status code, HTTP response headers (array of strings)
     */
    public function postLettersExportGetWithHttpInfo($filename)
    {
        $returnType = 'string';
        $request = $this->postLettersExportGetRequest($filename);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                );
            }

            $statusCode = $response->getStatusCode();

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

            $responseBody = $response->getBody();
            if ($returnType === '\SplFileObject') {
                $content = $responseBody; //stream goes to serializer
            } else {
                $content = $responseBody->getContents();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

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

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 401:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 403:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 404:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 405:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 429:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                default:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Operation postLettersExportGetAsync
     *
     * export post letter history
     *
     * @param  string $filename Filename to export to (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function postLettersExportGetAsync($filename)
    {
        return $this->postLettersExportGetAsyncWithHttpInfo($filename)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Operation postLettersExportGetAsyncWithHttpInfo
     *
     * export post letter history
     *
     * @param  string $filename Filename to export to (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function postLettersExportGetAsyncWithHttpInfo($filename)
    {
        $returnType = 'string';
        $request = $this->postLettersExportGetRequest($filename);

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

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

    /**
     * Create request for operation 'postLettersExportGet'
     *
     * @param  string $filename Filename to export to (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    protected function postLettersExportGetRequest($filename)
    {
        // verify the required parameter 'filename' is set
        if ($filename === null || (is_array($filename) && count($filename) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $filename when calling postLettersExportGet'
            );
        }

        $resourcePath = '/post/letters/history/export';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;

        // query params
        if ($filename !== null) {
            $queryParams['filename'] = ObjectSerializer::toQueryValue($filename);
        }


        // body params
        $_tempBody = null;

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

        // for model (json/xml)
        if (isset($_tempBody)) {
            // $_tempBody is the method argument, if present
            $httpBody = $_tempBody;
            
            if($headers['Content-Type'] === 'application/json') {
                // \stdClass has no __toString(), so we should encode it manually
                if ($httpBody instanceof \stdClass) {
                    $httpBody = \GuzzleHttp\json_encode($httpBody);
                }
                // array has no __toString(), so we should encode it manually
                if(is_array($httpBody)) {
                    $httpBody = \GuzzleHttp\json_encode(ObjectSerializer::sanitizeForSerialization($httpBody));
                }
            }
        } elseif (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $multipartContents[] = [
                        'name' => $formParamName,
                        'contents' => $formParamValue
                    ];
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

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

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

        // this endpoint requires HTTP basic authentication
        if ($this->config->getUsername() !== null || $this->config->getPassword() !== null) {
            $headers['Authorization'] = 'Basic ' . base64_encode($this->config->getUsername() . ":" . $this->config->getPassword());
        }

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

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

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

    /**
     * Operation postLettersHistoryGet
     *
     * Get all post letter history
     *
     * @param  int $page Page number (optional, default to 1)
     * @param  int $limit Number of records per page (optional, default to 10)
     *
     * @throws \ClickSend\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return string
     */
    public function postLettersHistoryGet($page = '1', $limit = '10')
    {
        list($response) = $this->postLettersHistoryGetWithHttpInfo($page, $limit);
        return $response;
    }

    /**
     * Operation postLettersHistoryGetWithHttpInfo
     *
     * Get all post letter history
     *
     * @param  int $page Page number (optional, default to 1)
     * @param  int $limit Number of records per page (optional, default to 10)
     *
     * @throws \ClickSend\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of string, HTTP status code, HTTP response headers (array of strings)
     */
    public function postLettersHistoryGetWithHttpInfo($page = '1', $limit = '10')
    {
        $returnType = 'string';
        $request = $this->postLettersHistoryGetRequest($page, $limit);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                );
            }

            $statusCode = $response->getStatusCode();

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

            $responseBody = $response->getBody();
            if ($returnType === '\SplFileObject') {
                $content = $responseBody; //stream goes to serializer
            } else {
                $content = $responseBody->getContents();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

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

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 401:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 403:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 404:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 405:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 429:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                default:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Operation postLettersHistoryGetAsync
     *
     * Get all post letter history
     *
     * @param  int $page Page number (optional, default to 1)
     * @param  int $limit Number of records per page (optional, default to 10)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function postLettersHistoryGetAsync($page = '1', $limit = '10')
    {
        return $this->postLettersHistoryGetAsyncWithHttpInfo($page, $limit)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Operation postLettersHistoryGetAsyncWithHttpInfo
     *
     * Get all post letter history
     *
     * @param  int $page Page number (optional, default to 1)
     * @param  int $limit Number of records per page (optional, default to 10)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function postLettersHistoryGetAsyncWithHttpInfo($page = '1', $limit = '10')
    {
        $returnType = 'string';
        $request = $this->postLettersHistoryGetRequest($page, $limit);

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

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

    /**
     * Create request for operation 'postLettersHistoryGet'
     *
     * @param  int $page Page number (optional, default to 1)
     * @param  int $limit Number of records per page (optional, default to 10)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    protected function postLettersHistoryGetRequest($page = '1', $limit = '10')
    {
        if ($page !== null && $page < 1) {
            throw new \InvalidArgumentException('invalid value for "$page" when calling PostLetterApi.postLettersHistoryGet, must be bigger than or equal to 1.');
        }

        if ($limit !== null && $limit < 1) {
            throw new \InvalidArgumentException('invalid value for "$limit" when calling PostLetterApi.postLettersHistoryGet, must be bigger than or equal to 1.');
        }


        $resourcePath = '/post/letters/history';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;

        // query params
        if ($page !== null) {
            $queryParams['page'] = ObjectSerializer::toQueryValue($page);
        }
        // query params
        if ($limit !== null) {
            $queryParams['limit'] = ObjectSerializer::toQueryValue($limit);
        }


        // body params
        $_tempBody = null;

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

        // for model (json/xml)
        if (isset($_tempBody)) {
            // $_tempBody is the method argument, if present
            $httpBody = $_tempBody;
            
            if($headers['Content-Type'] === 'application/json') {
                // \stdClass has no __toString(), so we should encode it manually
                if ($httpBody instanceof \stdClass) {
                    $httpBody = \GuzzleHttp\json_encode($httpBody);
                }
                // array has no __toString(), so we should encode it manually
                if(is_array($httpBody)) {
                    $httpBody = \GuzzleHttp\json_encode(ObjectSerializer::sanitizeForSerialization($httpBody));
                }
            }
        } elseif (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $multipartContents[] = [
                        'name' => $formParamName,
                        'contents' => $formParamValue
                    ];
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

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

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

        // this endpoint requires HTTP basic authentication
        if ($this->config->getUsername() !== null || $this->config->getPassword() !== null) {
            $headers['Authorization'] = 'Basic ' . base64_encode($this->config->getUsername() . ":" . $this->config->getPassword());
        }

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

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

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

    /**
     * Operation postLettersPricePost
     *
     * Calculate post letter price
     *
     * @param  \ClickSend\Model\PostLetter $post_letter PostLetter model (required)
     *
     * @throws \ClickSend\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return string
     */
    public function postLettersPricePost($post_letter)
    {
        list($response) = $this->postLettersPricePostWithHttpInfo($post_letter);
        return $response;
    }

    /**
     * Operation postLettersPricePostWithHttpInfo
     *
     * Calculate post letter price
     *
     * @param  \ClickSend\Model\PostLetter $post_letter PostLetter model (required)
     *
     * @throws \ClickSend\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of string, HTTP status code, HTTP response headers (array of strings)
     */
    public function postLettersPricePostWithHttpInfo($post_letter)
    {
        $returnType = 'string';
        $request = $this->postLettersPricePostRequest($post_letter);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                );
            }

            $statusCode = $response->getStatusCode();

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

            $responseBody = $response->getBody();
            if ($returnType === '\SplFileObject') {
                $content = $responseBody; //stream goes to serializer
            } else {
                $content = $responseBody->getContents();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

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

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 401:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 403:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 404:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 405:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 429:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                default:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Operation postLettersPricePostAsync
     *
     * Calculate post letter price
     *
     * @param  \ClickSend\Model\PostLetter $post_letter PostLetter model (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function postLettersPricePostAsync($post_letter)
    {
        return $this->postLettersPricePostAsyncWithHttpInfo($post_letter)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Operation postLettersPricePostAsyncWithHttpInfo
     *
     * Calculate post letter price
     *
     * @param  \ClickSend\Model\PostLetter $post_letter PostLetter model (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function postLettersPricePostAsyncWithHttpInfo($post_letter)
    {
        $returnType = 'string';
        $request = $this->postLettersPricePostRequest($post_letter);

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

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

    /**
     * Create request for operation 'postLettersPricePost'
     *
     * @param  \ClickSend\Model\PostLetter $post_letter PostLetter model (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    protected function postLettersPricePostRequest($post_letter)
    {
        // verify the required parameter 'post_letter' is set
        if ($post_letter === null || (is_array($post_letter) && count($post_letter) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $post_letter when calling postLettersPricePost'
            );
        }

        $resourcePath = '/post/letters/price';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;



        // body params
        $_tempBody = null;
        if (isset($post_letter)) {
            $_tempBody = $post_letter;
        }

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

        // for model (json/xml)
        if (isset($_tempBody)) {
            // $_tempBody is the method argument, if present
            $httpBody = $_tempBody;
            
            if($headers['Content-Type'] === 'application/json') {
                // \stdClass has no __toString(), so we should encode it manually
                if ($httpBody instanceof \stdClass) {
                    $httpBody = \GuzzleHttp\json_encode($httpBody);
                }
                // array has no __toString(), so we should encode it manually
                if(is_array($httpBody)) {
                    $httpBody = \GuzzleHttp\json_encode(ObjectSerializer::sanitizeForSerialization($httpBody));
                }
            }
        } elseif (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $multipartContents[] = [
                        'name' => $formParamName,
                        'contents' => $formParamValue
                    ];
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

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

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

        // this endpoint requires HTTP basic authentication
        if ($this->config->getUsername() !== null || $this->config->getPassword() !== null) {
            $headers['Authorization'] = 'Basic ' . base64_encode($this->config->getUsername() . ":" . $this->config->getPassword());
        }

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

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

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

    /**
     * Operation postLettersSendPost
     *
     * Send post letter
     *
     * @param  \ClickSend\Model\PostLetter $post_letter PostLetter model (required)
     *
     * @throws \ClickSend\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return string
     */
    public function postLettersSendPost($post_letter)
    {
        list($response) = $this->postLettersSendPostWithHttpInfo($post_letter);
        return $response;
    }

    /**
     * Operation postLettersSendPostWithHttpInfo
     *
     * Send post letter
     *
     * @param  \ClickSend\Model\PostLetter $post_letter PostLetter model (required)
     *
     * @throws \ClickSend\ApiException on non-2xx response
     * @throws \InvalidArgumentException
     * @return array of string, HTTP status code, HTTP response headers (array of strings)
     */
    public function postLettersSendPostWithHttpInfo($post_letter)
    {
        $returnType = 'string';
        $request = $this->postLettersSendPostRequest($post_letter);

        try {
            $options = $this->createHttpClientOption();
            try {
                $response = $this->client->send($request, $options);
            } catch (RequestException $e) {
                throw new ApiException(
                    "[{$e->getCode()}] {$e->getMessage()}",
                    $e->getCode(),
                    $e->getResponse() ? $e->getResponse()->getHeaders() : null,
                    $e->getResponse() ? $e->getResponse()->getBody()->getContents() : null
                );
            }

            $statusCode = $response->getStatusCode();

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

            $responseBody = $response->getBody();
            if ($returnType === '\SplFileObject') {
                $content = $responseBody; //stream goes to serializer
            } else {
                $content = $responseBody->getContents();
                if ($returnType !== 'string') {
                    $content = json_decode($content);
                }
            }

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

        } catch (ApiException $e) {
            switch ($e->getCode()) {
                case 200:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 400:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 401:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 403:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 404:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 405:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                case 429:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
                default:
                    $data = ObjectSerializer::deserialize(
                        $e->getResponseBody(),
                        'string',
                        $e->getResponseHeaders()
                    );
                    $e->setResponseObject($data);
                    break;
            }
            throw $e;
        }
    }

    /**
     * Operation postLettersSendPostAsync
     *
     * Send post letter
     *
     * @param  \ClickSend\Model\PostLetter $post_letter PostLetter model (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function postLettersSendPostAsync($post_letter)
    {
        return $this->postLettersSendPostAsyncWithHttpInfo($post_letter)
            ->then(
                function ($response) {
                    return $response[0];
                }
            );
    }

    /**
     * Operation postLettersSendPostAsyncWithHttpInfo
     *
     * Send post letter
     *
     * @param  \ClickSend\Model\PostLetter $post_letter PostLetter model (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Promise\PromiseInterface
     */
    public function postLettersSendPostAsyncWithHttpInfo($post_letter)
    {
        $returnType = 'string';
        $request = $this->postLettersSendPostRequest($post_letter);

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

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

    /**
     * Create request for operation 'postLettersSendPost'
     *
     * @param  \ClickSend\Model\PostLetter $post_letter PostLetter model (required)
     *
     * @throws \InvalidArgumentException
     * @return \GuzzleHttp\Psr7\Request
     */
    protected function postLettersSendPostRequest($post_letter)
    {
        // verify the required parameter 'post_letter' is set
        if ($post_letter === null || (is_array($post_letter) && count($post_letter) === 0)) {
            throw new \InvalidArgumentException(
                'Missing the required parameter $post_letter when calling postLettersSendPost'
            );
        }

        $resourcePath = '/post/letters/send';
        $formParams = [];
        $queryParams = [];
        $headerParams = [];
        $httpBody = '';
        $multipart = false;



        // body params
        $_tempBody = null;
        if (isset($post_letter)) {
            $_tempBody = $post_letter;
        }

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

        // for model (json/xml)
        if (isset($_tempBody)) {
            // $_tempBody is the method argument, if present
            $httpBody = $_tempBody;
            
            if($headers['Content-Type'] === 'application/json') {
                // \stdClass has no __toString(), so we should encode it manually
                if ($httpBody instanceof \stdClass) {
                    $httpBody = \GuzzleHttp\json_encode($httpBody);
                }
                // array has no __toString(), so we should encode it manually
                if(is_array($httpBody)) {
                    $httpBody = \GuzzleHttp\json_encode(ObjectSerializer::sanitizeForSerialization($httpBody));
                }
            }
        } elseif (count($formParams) > 0) {
            if ($multipart) {
                $multipartContents = [];
                foreach ($formParams as $formParamName => $formParamValue) {
                    $multipartContents[] = [
                        'name' => $formParamName,
                        'contents' => $formParamValue
                    ];
                }
                // for HTTP post (form)
                $httpBody = new MultipartStream($multipartContents);

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

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

        // this endpoint requires HTTP basic authentication
        if ($this->config->getUsername() !== null || $this->config->getPassword() !== null) {
            $headers['Authorization'] = 'Basic ' . base64_encode($this->config->getUsername() . ":" . $this->config->getPassword());
        }

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

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

        $query = \GuzzleHttp\Psr7\build_query($queryParams);
        return new Request(
            'POST',
            $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;
    }
}
