<?php
/**
 * Copyright (c) 2012 Sam Tuke <samtuke@owncloud.com>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */

require_once realpath( dirname(__FILE__).'/../../../lib/base.php' );
require_once realpath( dirname(__FILE__).'/../lib/crypt.php' );
require_once realpath( dirname(__FILE__).'/../lib/keymanager.php' );
require_once realpath( dirname(__FILE__).'/../lib/proxy.php' );
require_once realpath( dirname(__FILE__).'/../lib/stream.php' );
require_once realpath( dirname(__FILE__).'/../lib/util.php' );
require_once realpath( dirname(__FILE__).'/../appinfo/app.php' );

use OCA\Encryption;

/**
 * Class Test_Encryption_Util
 */
class Test_Encryption_Util extends \PHPUnit_Framework_TestCase {

	public $userId;
	public $encryptionDir;
	public $publicKeyDir;
	public $pass;
	/**
	 * @var OC_FilesystemView
	 */
	public $view;
	public $keyfilesPath;
	public $publicKeyPath;
	public $privateKeyPath;
	/**
	 * @var \OCA\Encryption\Util
	 */
	public $util;
	public $dataShort;

	function setUp() {
        // reset backend
        \OC_User::useBackend('database');

        \OC_User::setUserId( 'admin' );
        $this->userId = 'admin';
        $this->pass = 'admin';

        // set content for encrypting / decrypting in tests
		$this->dataUrl = realpath( dirname(__FILE__).'/../lib/crypt.php' );
		$this->dataShort = 'hats';
		$this->dataLong = file_get_contents( realpath( dirname(__FILE__).'/../lib/crypt.php' ) );
		$this->legacyData = realpath( dirname(__FILE__).'/legacy-text.txt' );
		$this->legacyEncryptedData = realpath( dirname(__FILE__).'/legacy-encrypted-text.txt' );

		$keypair = Encryption\Crypt::createKeypair();
		
		$this->genPublicKey =  $keypair['publicKey'];
		$this->genPrivateKey = $keypair['privateKey'];
		
		$this->publicKeyDir =  '/' . 'public-keys';
		$this->encryptionDir =  '/' . $this->userId . '/' . 'files_encryption';
		$this->keyfilesPath = $this->encryptionDir . '/' . 'keyfiles';
		$this->publicKeyPath = $this->publicKeyDir . '/' . $this->userId . '.public.key'; // e.g. data/public-keys/admin.public.key
		$this->privateKeyPath = $this->encryptionDir . '/' . $this->userId . '.private.key'; // e.g. data/admin/admin.private.key

        $this->view = new \OC_FilesystemView( '/' );

        $userHome = \OC_User::getHome($this->userId);
        $this->dataDir = str_replace('/'.$this->userId, '', $userHome);

        // Filesystem related hooks
        \OCA\Encryption\Helper::registerFilesystemHooks();

        \OC_FileProxy::register(new OCA\Encryption\Proxy());

        \OC_Util::tearDownFS();
        \OC_User::setUserId('');
        \OC\Files\Filesystem::tearDown();
        \OC_Util::setupFS($this->userId);
        \OC_User::setUserId($this->userId);

        $params['uid'] = $this->userId;
        $params['password'] = $this->pass;
        OCA\Encryption\Hooks::login($params);

		$this->util = new Encryption\Util( $this->view, $this->userId );
	}
	
	function tearDown(){
	
		\OC_FileProxy::clearProxies();
	}
	
	/**
	 * @brief test that paths set during User construction are correct
	 */
	function testKeyPaths() {
	
		$util = new Encryption\Util( $this->view, $this->userId );
		
		$this->assertEquals( $this->publicKeyDir, $util->getPath( 'publicKeyDir' ) );
		$this->assertEquals( $this->encryptionDir, $util->getPath( 'encryptionDir' ) );
		$this->assertEquals( $this->keyfilesPath, $util->getPath( 'keyfilesPath' ) );
		$this->assertEquals( $this->publicKeyPath, $util->getPath( 'publicKeyPath' ) );
		$this->assertEquals( $this->privateKeyPath, $util->getPath( 'privateKeyPath' ) );
	
	}
	
	/**
	 * @brief test setup of encryption directories
	 */
	function testSetupServerSide() {
	
		$this->assertEquals( true, $this->util->setupServerSide( $this->pass ) );
	}
	
	/**
	 * @brief test checking whether account is ready for encryption,
	 */
	function testUserIsReady() {
	
		$this->assertEquals( true, $this->util->ready() );
	}
	
	function testRecoveryEnabledForUser() {
		
		$util = new Encryption\Util( $this->view, $this->userId );
		
		// Record the value so we can return it to it's original state later
		$enabled = $util->recoveryEnabledForUser();
		
		$this->assertTrue( $util->setRecoveryForUser( 1 ) );
		
		$this->assertEquals( 1, $util->recoveryEnabledForUser() );
		
		$this->assertTrue( $util->setRecoveryForUser( 0 ) );
		
		$this->assertEquals( 0, $util->recoveryEnabledForUser() );
		
		// Return the setting to it's previous state
		$this->assertTrue( $util->setRecoveryForUser( $enabled ) );
		
	}
	
	function testGetUidAndFilename() {
	
		\OC_User::setUserId( 'admin' );

        $filename = 'tmp-'.time().'.test';

        // Disable encryption proxy to prevent recursive calls
        $proxyStatus = \OC_FileProxy::$enabled;
        \OC_FileProxy::$enabled = false;

        $this->view->file_put_contents($this->userId . '/files/' . $filename, $this->dataShort);

        // Re-enable proxy - our work is done
        \OC_FileProxy::$enabled = $proxyStatus;

        $util = new Encryption\Util( $this->view, $this->userId );

        list($fileOwnerUid, $file) = $util->getUidAndFilename( $filename );

        $this->assertEquals('admin', $fileOwnerUid);

        $this->assertEquals($file, $filename);
	}
}