<?php
/**
 * 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 SquareConnect;

/**
 * ApiClient Class Doc Comment
 *
 * @category Class
 * @package  SquareConnect
 * @author   Square Inc.
 * @license  http://www.apache.org/licenses/LICENSE-2.0 Apache Licene v2
 * @link     https://squareup.com/developers
 */
class ApiClient
{

    public static $PATCH = "PATCH";
    public static $POST = "POST";
    public static $GET = "GET";
    public static $HEAD = "HEAD";
    public static $OPTIONS = "OPTIONS";
    public static $PUT = "PUT";
    public static $DELETE = "DELETE";

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

    /**
     * Object Serializer
     * @var ObjectSerializer
     */
    protected $serializer;

    /**
     * Constructor of the class
     * @param Configuration $config config for this ApiClient
     */
    public function __construct(Configuration $config = null)
    {
        if ($config == null) {
            $config = Configuration::getDefaultConfiguration();
        }

        $this->config = $config;
        $this->serializer = new ObjectSerializer();
    }

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

    /**
     * Get the serializer
     * @return ObjectSerializer
     */
    public function getSerializer()
    {
        return $this->serializer;
    }

    /**
     * Get API key (with prefix if set)
     * @param  string $apiKeyIdentifier name of apikey
     * @return string API key with the prefix
     */
    public function getApiKeyWithPrefix($apiKeyIdentifier)
    {
        $prefix = $this->config->getApiKeyPrefix($apiKeyIdentifier);
        $apiKey = $this->config->getApiKey($apiKeyIdentifier);

        if (!isset($apiKey)) {
            return null;
        }

        if (isset($prefix)) {
            $keyWithPrefix = $prefix." ".$apiKey;
        } else {
            $keyWithPrefix = $apiKey;
        }

        return $keyWithPrefix;
    }

    /**
     * Make the HTTP call (Sync)
     * @param string $resourcePath path to method endpoint
     * @param string $method       method to call
     * @param array  $queryParams  parameters to be place in query URL
     * @param array  $postData     parameters to be placed in POST body
     * @param array  $headerParams parameters to be place in request header
     * @param string $responseType expected response type of the endpoint
     * @throws \SquareConnect\ApiException on a non 2xx response
     * @return mixed
     */
    public function callApi($resourcePath, $method, $queryParams, $postData, $headerParams, $responseType = null)
    {

        $headers = array();

        // construct the http header
        $headerParams = array_merge(
            (array)$this->config->getDefaultHeaders(),
            (array)$headerParams
        );

        foreach ($headerParams as $key => $val) {
            if (strcasecmp($key, "Authorization") == 0 ) {
              if (strrpos($val, "Bearer", -strlen($val)) === false) {
                $headers[] = "$key: Bearer $val";
                continue;
              }
            }
            $headers[] = "$key: $val";
        }

        // form data
        if ($postData and in_array('Content-Type: application/x-www-form-urlencoded', $headers)) {
            $postData = http_build_query($postData);
        } elseif ((is_object($postData) or is_array($postData)) and !in_array('Content-Type: multipart/form-data', $headers)) { // json model
            $postData = json_encode(\SquareConnect\ObjectSerializer::sanitizeForSerialization($postData));
        }

        $url = $this->config->getHost() . $resourcePath;

        $curl = curl_init();
        // set timeout, if needed
        if ($this->config->getCurlTimeout() != 0) {
            curl_setopt($curl, CURLOPT_TIMEOUT, $this->config->getCurlTimeout());
        }
        // return the result on success, rather than just true
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

        curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);

        // disable SSL verification, if needed
        if ($this->config->getSSLVerification() == false) {
            curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
            curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
        }

        if (! empty($queryParams)) {
            $url = ($url . '?' . http_build_query($queryParams));
        }

        if ($method == self::$POST) {
            curl_setopt($curl, CURLOPT_POST, true);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
        } elseif ($method == self::$HEAD) {
            curl_setopt($curl, CURLOPT_NOBODY, true);
        } elseif ($method == self::$OPTIONS) {
            curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "OPTIONS");
            curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
        } elseif ($method == self::$PATCH) {
            curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "PATCH");
            curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
        } elseif ($method == self::$PUT) {
            curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "PUT");
            curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
        } elseif ($method == self::$DELETE) {
            curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "DELETE");
            curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
        } elseif ($method != self::$GET) {
            throw new ApiException('Method ' . $method . ' is not recognized.');
        }
        curl_setopt($curl, CURLOPT_URL, $url);

        // Set user agent
        curl_setopt($curl, CURLOPT_USERAGENT, $this->config->getUserAgent());

        // debugging for curl
        if ($this->config->getDebug()) {
            error_log("[DEBUG] HTTP Request body  ~BEGIN~\n".print_r($postData, true)."\n~END~\n", 3, $this->config->getDebugFile());

            curl_setopt($curl, CURLOPT_VERBOSE, 1);
            curl_setopt($curl, CURLOPT_STDERR, fopen($this->config->getDebugFile(), 'a'));
        } else {
            curl_setopt($curl, CURLOPT_VERBOSE, 0);
        }

        // obtain the HTTP response headers
        curl_setopt($curl, CURLOPT_HEADER, 1);

        // Make the request
        $response = curl_exec($curl);
        $http_header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
        $http_header = $this->http_parse_headers(substr($response, 0, $http_header_size));
        $http_body = substr($response, $http_header_size);
        $response_info = curl_getinfo($curl);

        // debug HTTP response body
        if ($this->config->getDebug()) {
            error_log("[DEBUG] HTTP Response body ~BEGIN~\n".print_r($http_body, true)."\n~END~\n", 3, $this->config->getDebugFile());
        }

        // Handle the response
        if ($response_info['http_code'] == 0) {
            $curl_error_message = curl_error($curl);

            // curl_exec can sometimes fail but still return a blank message from curl_error().
            if (!empty($curl_error_message)) {
                $error_message = "API call to $url failed: " . curl_error($curl);
            } else {
                $error_message = "API call to $url failed, but for an unknown reason. " .
                    "This could happen if you are disconnected from the network.";
            }
            throw new ApiException($error_message, 0, null, null);
        } elseif ($response_info['http_code'] >= 200 && $response_info['http_code'] <= 299 ) {
            // return raw body if response is a file
            if ($responseType == '\SplFileObject' || $responseType == 'ByteArray') {
                return array($http_body, $response_info['http_code'], $http_header);
            }

            $data = json_decode($http_body);
            if (json_last_error() > 0) { // if response is a string
                $data = $http_body;
            }
        } else {
            $data = json_decode($http_body);
            if (json_last_error() > 0) { // if response is a string
                $data = $http_body;
            }

            throw new ApiException(
                "[{$http_header[0]}] $http_body",
                $response_info['http_code'], $http_header, $data
            );
        }
        return array($data, $response_info['http_code'], $http_header);
    }

    /**
     * Return the header 'Accept' based on an array of Accept provided
     *
     * @param string[] $accept Array of header
     *
     * @return string Accept (e.g. application/json)
     */
    public static function selectHeaderAccept($accept)
    {
        if (count($accept) === 0 or (count($accept) === 1 and $accept[0] === '')) {
            return null;
        } elseif (preg_grep("/application\/json/i", $accept)) {
            return 'application/json';
        } else {
            return implode(',', $accept);
        }
    }

    /**
     * Return the content type based on an array of content-type provided
     *
     * @param string[] $content_type Array fo content-type
     *
     * @return string Content-Type (e.g. application/json)
     */
    public static function selectHeaderContentType($content_type)
    {
        if (count($content_type) === 0 or (count($content_type) === 1 and $content_type[0] === '')) {
            return 'application/json';
        } elseif (preg_grep("/application\/json/i", $content_type)) {
            return 'application/json';
        } else {
            return implode(',', $content_type);
        }
    }

    /**
     * Return a batch_token if present on the Link header or null if no token
     * is present
     *
     * @param string[] Array of HTTP response heaers
     *
     * @return
     */
    public static function getV1BatchTokenFromHeaders($http_headers) {
        if (is_array($http_headers) && isset($http_headers['Link']))
        {
            $connect_link_regexp = "/^<([^>]+)>;rel='next'$/";
            if (preg_match($connect_link_regexp, $http_headers['Link'], $match) === 1)
            {
                $link_uri = $match[1];
                if ($query = parse_url($link_uri, PHP_URL_QUERY))
                {
                    parse_str($query, $query_params);
                    if (is_array($query_params) && isset($query_params['batch_token']))
                    {
                        return $query_params['batch_token'];
                    }
                }
            }
        }

        return null;
    }

   /**
    * Return an array of HTTP response headers
    *
    * @param string $raw_headers A string of raw HTTP response headers
    *
    * @return string[] Array of HTTP response heaers
    */
    protected function http_parse_headers($raw_headers)
    {
        // ref/credit: http://php.net/manual/en/function.http-parse-headers.php#112986
        $headers = array();
        $key = ''; // [+]

        foreach(explode("\n", $raw_headers) as $i => $h)
        {
            $h = explode(':', $h, 2);

            if (isset($h[1]))
            {
                if (!isset($headers[$h[0]]))
                    $headers[$h[0]] = trim($h[1]);
                elseif (is_array($headers[$h[0]]))
                {
                    // $tmp = array_merge($headers[$h[0]], array(trim($h[1]))); // [-]
                    // $headers[$h[0]] = $tmp; // [-]
                    $headers[$h[0]] = array_merge($headers[$h[0]], array(trim($h[1]))); // [+]
                }
                else
                {
                    // $tmp = array_merge(array($headers[$h[0]]), array(trim($h[1]))); // [-]
                    // $headers[$h[0]] = $tmp; // [-]
                    $headers[$h[0]] = array_merge(array($headers[$h[0]]), array(trim($h[1]))); // [+]
                }

                $key = $h[0]; // [+]
            }
            else // [+]
            { // [+]
                if (substr($h[0], 0, 1) == "\t") // [+]
                    $headers[$key] .= "\r\n\t".trim($h[0]); // [+]
                elseif (!$key) // [+]
                    $headers[0] = trim($h[0]);trim($h[0]); // [+]
            } // [+]
        }

        return $headers;
    }
}
