<?php

namespace Google\Site_Kit_Dependencies\GuzzleHttp\Ring\Client;

use Google\Site_Kit_Dependencies\GuzzleHttp\Ring\Future\CompletedFutureArray;
use Google\Site_Kit_Dependencies\GuzzleHttp\Ring\Core;
/**
 * HTTP handler that uses cURL easy handles as a transport layer.
 *
 * Requires PHP 5.5+
 *
 * When using the CurlHandler, custom curl options can be specified as an
 * associative array of curl option constants mapping to values in the
 * **curl** key of the "client" key of the request.
 */
class CurlHandler
{
    /** @var callable */
    private $factory;
    /** @var array Array of curl easy handles */
    private $handles = [];
    /** @var array Array of owned curl easy handles */
    private $ownedHandles = [];
    /** @var int Total number of idle handles to keep in cache */
    private $maxHandles;
    /**
     * Accepts an associative array of options:
     *
     * - factory: Optional callable factory used to create cURL handles.
     *   The callable is passed a request hash when invoked, and returns an
     *   array of the curl handle, headers resource, and body resource.
     * - max_handles: Maximum number of idle handles (defaults to 5).
     *
     * @param array $options Array of options to use with the handler
     */
    public function __construct(array $options = [])
    {
        $this->handles = $this->ownedHandles = [];
        $this->factory = isset($options['handle_factory']) ? $options['handle_factory'] : new \Google\Site_Kit_Dependencies\GuzzleHttp\Ring\Client\CurlFactory();
        $this->maxHandles = isset($options['max_handles']) ? $options['max_handles'] : 5;
    }
    public function __destruct()
    {
        foreach ($this->handles as $handle) {
            if (\is_resource($handle)) {
                \curl_close($handle);
            }
        }
    }
    /**
     * @param array $request
     *
     * @return CompletedFutureArray
     */
    public function __invoke(array $request)
    {
        return new \Google\Site_Kit_Dependencies\GuzzleHttp\Ring\Future\CompletedFutureArray($this->_invokeAsArray($request));
    }
    /**
     * @internal
     *
     * @param array $request
     *
     * @return array
     */
    public function _invokeAsArray(array $request)
    {
        $factory = $this->factory;
        // Ensure headers are by reference. They're updated elsewhere.
        $result = $factory($request, $this->checkoutEasyHandle());
        $h = $result[0];
        $hd =& $result[1];
        $bd = $result[2];
        \Google\Site_Kit_Dependencies\GuzzleHttp\Ring\Core::doSleep($request);
        \curl_exec($h);
        $response = ['transfer_stats' => \curl_getinfo($h)];
        $response['curl']['error'] = \curl_error($h);
        $response['curl']['errno'] = \curl_errno($h);
        $response['transfer_stats'] = \array_merge($response['transfer_stats'], $response['curl']);
        $this->releaseEasyHandle($h);
        return \Google\Site_Kit_Dependencies\GuzzleHttp\Ring\Client\CurlFactory::createResponse([$this, '_invokeAsArray'], $request, $response, $hd, $bd);
    }
    private function checkoutEasyHandle()
    {
        // Find an unused handle in the cache
        if (\false !== ($key = \array_search(\false, $this->ownedHandles, \true))) {
            $this->ownedHandles[$key] = \true;
            return $this->handles[$key];
        }
        // Add a new handle
        $handle = \curl_init();
        $id = (int) $handle;
        $this->handles[$id] = $handle;
        $this->ownedHandles[$id] = \true;
        return $handle;
    }
    private function releaseEasyHandle($handle)
    {
        $id = (int) $handle;
        if (\count($this->ownedHandles) > $this->maxHandles) {
            \curl_close($this->handles[$id]);
            unset($this->handles[$id], $this->ownedHandles[$id]);
        } else {
            // curl_reset doesn't clear these out for some reason
            static $unsetValues = [\CURLOPT_HEADERFUNCTION => null, \CURLOPT_WRITEFUNCTION => null, \CURLOPT_READFUNCTION => null, \CURLOPT_PROGRESSFUNCTION => null];
            \curl_setopt_array($handle, $unsetValues);
            \curl_reset($handle);
            $this->ownedHandles[$id] = \false;
        }
    }
}
