<?php
/**
 * @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

namespace Test\Remote;


use OC\Memcache\ArrayCache;
use OC\Remote\Instance;
use OCP\Http\Client\IClient;
use OCP\Http\Client\IClientService;
use OCP\Http\Client\IResponse;
use OCP\ICache;
use Test\TestCase;

class InstanceTest extends TestCase {
	/** @var IClientService|\PHPUnit_Framework_MockObject_MockObject */
	private $clientService;
	/** @var IClient|\PHPUnit_Framework_MockObject_MockObject */
	private $client;
	/** @var ICache */
	private $cache;
	private $expectedRequests = [];

	protected function setUp() {
		parent::setUp();

		$this->cache = new ArrayCache();

		$this->clientService = $this->createMock(IClientService::class);
		$this->client = $this->createMock(IClient::class);
		$this->clientService->expects($this->any())
			->method('newClient')
			->willReturn($this->client);
		$this->client->expects($this->any())
			->method('get')
			->willReturnCallback(function ($url) {
				if (!isset($this->expectedRequests[$url])) {
					throw new \Exception('unexpected request');
				}
				$result = $this->expectedRequests[$url];

				if ($result instanceof \Exception) {
					throw $result;
				} else {
					$response = $this->createMock(IResponse::class);
					$response->expects($this->any())
						->method('getBody')
						->willReturn($result);
					return $response;
				}
			});
	}

	/**
	 * @param string $url
	 * @param string|\Exception $result
	 */
	protected function expectRequest($url, $result) {
		$this->expectedRequests[$url] = $result;
	}

	public function testBasicStatus() {
		$instance = new Instance('example.com', $this->cache, $this->clientService);
		$this->expectRequest('https://example.com/status.php', '{"installed":true,"maintenance":false,"needsDbUpgrade":false,"version":"13.0.0.5","versionstring":"13.0.0 alpha","edition":"","productname":"Nextcloud"}');

		$this->assertEquals(true, $instance->isActive());
		$this->assertEquals('13.0.0.5', $instance->getVersion());
		$this->assertEquals('https', $instance->getProtocol());
		$this->assertEquals('https://example.com', $instance->getFullUrl());
	}

	public function testHttpFallback() {
		$instance = new Instance('example.com', $this->cache, $this->clientService);
		$this->expectRequest('https://example.com/status.php', new \Exception());
		$this->expectRequest('http://example.com/status.php', '{"installed":true,"maintenance":false,"needsDbUpgrade":false,"version":"13.0.0.5","versionstring":"13.0.0 alpha","edition":"","productname":"Nextcloud"}');

		$this->assertEquals('http', $instance->getProtocol());
		$this->assertEquals('http://example.com', $instance->getFullUrl());
	}

	public function testRerequestHttps() {
		$instance = new Instance('example.com', $this->cache, $this->clientService);
		$this->expectRequest('https://example.com/status.php', '{"installed":true,"maintenance":false,"needsDbUpgrade":false,"version":"13.0.0.5","versionstring":"13.0.0 alpha","edition":"","productname":"Nextcloud"}');

		$this->assertEquals('https', $instance->getProtocol());
		$this->assertEquals(true, $instance->isActive());

		$this->cache->remove('remote/example.com/status');
		$this->expectRequest('https://example.com/status.php', '{"installed":true,"maintenance":true,"needsDbUpgrade":false,"version":"13.0.0.5","versionstring":"13.0.0 alpha","edition":"","productname":"Nextcloud"}');
		$instance2 = new Instance('example.com', $this->cache, $this->clientService);
		$this->assertEquals('https', $instance2->getProtocol());
		$this->assertEquals(false, $instance2->isActive());
	}

	/**
	 * @expectedException \Exception
	 * @expectedExceptionMessage refusing to connect to remote instance(example.com) over http that was previously accessible over https
	 */
	public function testPreventDowngradeAttach() {
		$instance = new Instance('example.com', $this->cache, $this->clientService);
		$this->expectRequest('https://example.com/status.php', '{"installed":true,"maintenance":false,"needsDbUpgrade":false,"version":"13.0.0.5","versionstring":"13.0.0 alpha","edition":"","productname":"Nextcloud"}');

		$this->assertEquals('https', $instance->getProtocol());

		$this->expectRequest('https://example.com/status.php', new \Exception());
		$this->cache->remove('remote/example.com/status');
		$instance2 = new Instance('example.com', $this->cache, $this->clientService);
		$instance2->getProtocol();
	}
}