<?php

namespace Friendica\Directory\Pollers;

use Friendica\Directory\Utils\Network;

/**
 * @author Hypolite Petovan <hypolite@mrpetovan.com>
 */
class Directory
{
	/**
	 * @var \GuzzleHttp\ClientInterface
	 */
	private $http;
	/**
	 * @var \Friendica\Directory\Models\ProfilePollQueue
	 */
	private $profilePollQueueModel;
	/**
	 * @var \Psr\Log\LoggerInterface
	 */
	private $logger;

	/**
	 * @var array
	 */
	private $settings = [
		'probe_timeout' => 5
	];

	public function __construct(
		\GuzzleHttp\ClientInterface $http,
		\Friendica\Directory\Models\ProfilePollQueue $profilePollQueueModel,
		\Psr\Log\LoggerInterface $logger,
		array $settings)
	{
		$this->http = $http;
		$this->profilePollQueueModel = $profilePollQueueModel;
		$this->logger = $logger;
		$this->settings = array_merge($this->settings, $settings);
	}

	/**
	 * @param string   $directory_url
	 * @param int|null $last_polled
	 * @return bool
	 */
	public function __invoke(string $directory_url, int $last_polled = null): bool
	{
		$this->logger->info('Pull from directory with URL: ' . $directory_url);

		try {
			$host = parse_url($directory_url, PHP_URL_HOST);
			if (!$host) {
				throw new \Exception('Missing hostname in polled directory URL: ' . $directory_url);
			}

			if (!\Friendica\Directory\Utils\Network::isPublicHost($host)) {
				throw new \Exception('Private/reserved IP in polled directory URL: ' . $directory_url);
			}

			$profiles = $this->getPullResult($directory_url, $last_polled);
			foreach ($profiles as $profile_url) {
				$result = $this->profilePollQueueModel->add($profile_url);
				$this->logger->debug('Profile queue add URL: ' . $profile_url . ' - ' . $result);
			}

			$this->logger->info('Successfully pulled ' . count($profiles) . ' profiles');

			return true;
		} catch (\Exception $e) {
			$this->logger->warning($e->getMessage());
			return false;
		}
	}

	private function getPullResult(string $directory_url, ?int $last_polled = null): array
	{
		$path = '/sync/pull/all';
		if ($last_polled) {
			$path = '/sync/pull/since/' . $last_polled;
		}

		$pull_data = $this->http->get($directory_url . $path, ['timeout' => max($this->settings['probe_timeout'], 1)])->getBody()->getContents();

		$data = json_decode($pull_data, true);

		if (!isset($data['results']) || !is_array($data['results'])) {
			throw new \Exception('Invalid directory pull data for directory with URL: ' . $directory_url . $path);
		}

		return $data['results'];
	}
}