<?php

declare(strict_types=1);
/**
 * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
 * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
 * SPDX-License-Identifier: AGPL-3.0-only
 */
namespace OC\Http\Client;

use GuzzleHttp\Client as GuzzleClient;
use GuzzleHttp\Handler\CurlHandler;
use GuzzleHttp\HandlerStack;
use GuzzleHttp\Middleware;
use OCP\Diagnostics\IEventLogger;
use OCP\Http\Client\IClient;
use OCP\Http\Client\IClientService;
use OCP\ICertificateManager;
use OCP\IConfig;
use OCP\Security\IRemoteHostValidator;
use Psr\Http\Message\RequestInterface;
use Psr\Log\LoggerInterface;

/**
 * Class ClientService
 *
 * @package OC\Http
 */
class ClientService implements IClientService {
	/** @var IConfig */
	private $config;
	/** @var ICertificateManager */
	private $certificateManager;
	/** @var DnsPinMiddleware */
	private $dnsPinMiddleware;
	private IRemoteHostValidator $remoteHostValidator;
	private IEventLogger $eventLogger;

	public function __construct(
		IConfig $config,
		ICertificateManager $certificateManager,
		DnsPinMiddleware $dnsPinMiddleware,
		IRemoteHostValidator $remoteHostValidator,
		IEventLogger $eventLogger,
		protected LoggerInterface $logger,
	) {
		$this->config = $config;
		$this->certificateManager = $certificateManager;
		$this->dnsPinMiddleware = $dnsPinMiddleware;
		$this->remoteHostValidator = $remoteHostValidator;
		$this->eventLogger = $eventLogger;
	}

	/**
	 * @return Client
	 */
	public function newClient(): IClient {
		$handler = new CurlHandler();
		$stack = HandlerStack::create($handler);
		if ($this->config->getSystemValueBool('dns_pinning', true)) {
			$stack->push($this->dnsPinMiddleware->addDnsPinning());
		}
		$stack->push(Middleware::tap(function (RequestInterface $request) {
			$this->eventLogger->start('http:request', $request->getMethod() . ' request to ' . $request->getRequestTarget());
		}, function () {
			$this->eventLogger->end('http:request');
		}), 'event logger');

		$client = new GuzzleClient(['handler' => $stack]);

		return new Client(
			$this->config,
			$this->certificateManager,
			$client,
			$this->remoteHostValidator,
			$this->logger,
		);
	}
}