<?php
/**
 * Copyright 2015 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace Google\Auth\HttpHandler;

use GuzzleHttp\ClientInterface;
use GuzzleHttp\Psr7\Response;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;

class Guzzle5HttpHandler
{
  /**
   * @var ClientInterface
   */
  private $client;

  /**
   * @param ClientInterface $client
   */
  public function __construct(ClientInterface $client)
  {
    $this->client = $client;
  }

  /**
   * Accepts a PSR-7 Request and an array of options and returns a PSR-7 response.
   *
   * @param RequestInterface $request
   * @param array $options
   * @return ResponseInterface
   */
  public function __invoke(RequestInterface $request, array $options = [])
  {
    $request = $this->client->createRequest(
      $request->getMethod(),
      $request->getUri(),
      array_merge([
        'headers' => $request->getHeaders(),
        'body' => $request->getBody()
      ], $options)
    );

    $response = $this->client->send($request);

    return new Response(
      $response->getStatusCode(),
      $response->getHeaders() ?: [],
      $response->getBody(),
      $response->getProtocolVersion(),
      $response->getReasonPhrase()
    );
  }
}
