<?php

namespace Bmatovu\OAuthNegotiator\GrantTypes;

use GuzzleHttp\ClientInterface;

/**
 * Class ClientCredentials.
 */
class ClientCredentials implements GrantTypeInterface
{
	/**
	 * The token endpoint client.
	 *
	 * @var \GuzzleHttp\ClientInterface
	 */
	private $client;

	/**
	 * Configuration settings.
	 *
	 * @var array
	 */
	private $config;


	/**
	 * Constructor.
	 *
	 * @param \GuzzleHttp\ClientInterface $client
	 * @param array                       $config
	 *
	 * @throws \InvalidArgumentException
	 */
	public function __construct(ClientInterface $client, array $config)
	{
		$this->client = $client;

		$required = ['token_uri', 'client_id', 'client_secret'];

		if ($missing = missing_keys($required, $config)) {
		    $message = 'Parameters: '.implode(', ', $missing).' are required.';

		    throw new \InvalidArgumentException($message, 0);
		}

		$this->config = array_merge([
		    'scope' => '',
		], $config);
	}


	/**
	 * {@inheritdoc}
	 *
	 * @throws \GuzzleHttp\Exception\GuzzleException
	 */
	public function getToken($refreshToken = null)
	{
		$response = $this->client->request('POST', $this->config['token_uri'], [
		    'headers' => [
		        'Accept'        => 'application/json',
		        'Content-Type'  => 'application/json',
		        'Authorization' => 'Basic '.base64_encode($this->config['client_id'].':'.$this->config['client_secret']),
		    ],
		    'json' => [
		        'grant_type' => 'client_credentials',
		        'scope'      => $this->config['scope'],
		    ],
		]);

		return json_decode($response->getBody(), true);
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----OTUxNTY3MzMwNjU5MTAyNyA1NTQ4OTIyMDU1ODk4MTg5IDIwMzMyMjQyNzY4ODk5MTE=