<?php

namespace Test\Encryption;

use OC\Encryption\Manager;
use OC\Encryption\Util;
use OC\Files\View;
use OC\Memcache\ArrayCache;
use OCP\Encryption\IEncryptionModule;
use OCP\IConfig;
use OCP\IL10N;
use Psr\Log\LoggerInterface;
use Test\TestCase;

class ManagerTest extends TestCase {
	/** @var Manager */
	private $manager;

	/** @var IConfig|\PHPUnit\Framework\MockObject\MockObject */
	private $config;

	/** @var LoggerInterface|\PHPUnit\Framework\MockObject\MockObject */
	private $logger;

	/** @var IL10N|\PHPUnit\Framework\MockObject\MockObject */
	private $l10n;

	/** @var View|\PHPUnit\Framework\MockObject\MockObject */
	private $view;

	/** @var Util|\PHPUnit\Framework\MockObject\MockObject */
	private $util;

	/** @var ArrayCache|\PHPUnit\Framework\MockObject\MockObject */
	private $arrayCache;

	protected function setUp(): void {
		parent::setUp();
		$this->config = $this->createMock(IConfig::class);
		$this->logger = $this->createMock(LoggerInterface::class);
		$this->l10n = $this->createMock(IL10N::class);
		$this->view = $this->createMock(View::class);
		$this->util = $this->createMock(Util::class);
		$this->arrayCache = $this->createMock(ArrayCache::class);
		$this->manager = new Manager($this->config, $this->logger, $this->l10n, $this->view, $this->util, $this->arrayCache);
	}

	public function testManagerIsDisabled() {
		$this->assertFalse($this->manager->isEnabled());
	}

	public function testManagerIsDisabledIfEnabledButNoModules() {
		$this->config->expects($this->any())->method('getAppValue')->willReturn(true);
		$this->assertFalse($this->manager->isEnabled());
	}

	public function testManagerIsDisabledIfDisabledButModules() {
		$this->config->expects($this->any())->method('getAppValue')->willReturn(false);
		$em = $this->createMock(IEncryptionModule::class);
		$em->expects($this->any())->method('getId')->willReturn('id');
		$em->expects($this->any())->method('getDisplayName')->willReturn('TestDummyModule0');
		$this->manager->registerEncryptionModule('id', 'TestDummyModule0', function () use ($em) {
			return $em;
		});
		$this->assertFalse($this->manager->isEnabled());
	}

	public function testManagerIsEnabled() {
		$this->config->expects($this->any())->method('getSystemValueBool')->willReturn(true);
		$this->config->expects($this->any())->method('getAppValue')->willReturn('yes');
		$this->assertTrue($this->manager->isEnabled());
	}

	public function testModuleRegistration() {
		$this->config->expects($this->any())->method('getAppValue')->willReturn('yes');

		$this->addNewEncryptionModule($this->manager, 0);
		$this->assertCount(1, $this->manager->getEncryptionModules());

		return $this->manager;
	}

	/**
	 * @depends testModuleRegistration
	 */
	public function testModuleReRegistration($manager) {
		$this->expectException(\OC\Encryption\Exceptions\ModuleAlreadyExistsException::class);
		$this->expectExceptionMessage('Id "ID0" already used by encryption module "TestDummyModule0"');

		$this->addNewEncryptionModule($manager, 0);
	}

	public function testModuleUnRegistration() {
		$this->config->expects($this->any())->method('getAppValue')->willReturn(true);
		$this->addNewEncryptionModule($this->manager, 0);
		$this->assertCount(1, $this->manager->getEncryptionModules());

		$this->manager->unregisterEncryptionModule('ID0');
		$this->assertEmpty($this->manager->getEncryptionModules());
	}


	public function testGetEncryptionModuleUnknown() {
		$this->expectException(\OC\Encryption\Exceptions\ModuleDoesNotExistsException::class);
		$this->expectExceptionMessage('Module with ID: unknown does not exist.');

		$this->config->expects($this->any())->method('getAppValue')->willReturn(true);
		$this->addNewEncryptionModule($this->manager, 0);
		$this->assertCount(1, $this->manager->getEncryptionModules());
		$this->manager->getEncryptionModule('unknown');
	}

	public function testGetEncryptionModuleEmpty() {
		global $defaultId;
		$defaultId = null;

		$this->config->expects($this->any())
			->method('getAppValue')
			->with('core', 'default_encryption_module')
			->willReturnCallback(function () {
				global $defaultId;
				return $defaultId;
			});

		$this->addNewEncryptionModule($this->manager, 0);
		$this->assertCount(1, $this->manager->getEncryptionModules());
		$this->addNewEncryptionModule($this->manager, 1);
		$this->assertCount(2, $this->manager->getEncryptionModules());

		// Should return the default module
		$defaultId = 'ID0';
		$this->assertEquals('ID0', $this->manager->getEncryptionModule()->getId());
		$defaultId = 'ID1';
		$this->assertEquals('ID1', $this->manager->getEncryptionModule()->getId());
	}

	public function testGetEncryptionModule() {
		global $defaultId;
		$defaultId = null;

		$this->config->expects($this->any())
			->method('getAppValue')
			->with('core', 'default_encryption_module')
			->willReturnCallback(function () {
				global $defaultId;
				return $defaultId;
			});

		$this->addNewEncryptionModule($this->manager, 0);
		$defaultId = 'ID0';
		$this->assertCount(1, $this->manager->getEncryptionModules());

		$en0 = $this->manager->getEncryptionModule('ID0');
		$this->assertEquals('ID0', $en0->getId());

		$en0 = self::invokePrivate($this->manager, 'getDefaultEncryptionModule');
		$this->assertEquals('ID0', $en0->getId());

		$this->assertEquals('ID0', $this->manager->getDefaultEncryptionModuleId());
	}

	public function testSetDefaultEncryptionModule() {
		global $defaultId;
		$defaultId = null;

		$this->config->expects($this->any())
			->method('getAppValue')
			->with('core', 'default_encryption_module')
			->willReturnCallback(function () {
				global $defaultId;
				return $defaultId;
			});

		$this->addNewEncryptionModule($this->manager, 0);
		$this->assertCount(1, $this->manager->getEncryptionModules());
		$this->addNewEncryptionModule($this->manager, 1);
		$this->assertCount(2, $this->manager->getEncryptionModules());

		// Default module is the first we set
		$defaultId = 'ID0';
		$this->assertEquals('ID0', $this->manager->getDefaultEncryptionModuleId());

		// Set to an existing module
		$this->config->expects($this->once())
			->method('setAppValue')
			->with('core', 'default_encryption_module', 'ID1');
		$this->assertTrue($this->manager->setDefaultEncryptionModule('ID1'));
		$defaultId = 'ID1';
		$this->assertEquals('ID1', $this->manager->getDefaultEncryptionModuleId());

		// Set to an unexisting module
		$this->assertFalse($this->manager->setDefaultEncryptionModule('ID2'));
		$this->assertEquals('ID1', $this->manager->getDefaultEncryptionModuleId());
	}

	//	/**
	//	 * @expectedException \OC\Encryption\Exceptions\ModuleAlreadyExistsException
	//	 * @expectedExceptionMessage Id "0" already used by encryption module "TestDummyModule0"
	//	 */
	//	public function testModuleRegistration() {
	//		$config = $this->createMock(IConfig::class);
	//		$config->expects($this->any())->method('getSystemValueBool')->willReturn(true);
	//		$em = $this->createMock(IEncryptionModule::class);
	//		$em->expects($this->any())->method('getId')->willReturn(0);
	//		$em->expects($this->any())->method('getDisplayName')->willReturn('TestDummyModule0');
	//		$m = new Manager($config);
	//		$m->registerEncryptionModule($em);
	//		$this->assertTrue($m->isEnabled());
	//		$m->registerEncryptionModule($em);
	//	}
	//
	//	public function testModuleUnRegistration() {
	//		$config = $this->createMock(IConfig::class);
	//		$config->expects($this->any())->method('getSystemValueBool')->willReturn(true);
	//		$em = $this->createMock(IEncryptionModule::class);
	//		$em->expects($this->any())->method('getId')->willReturn(0);
	//		$em->expects($this->any())->method('getDisplayName')->willReturn('TestDummyModule0');
	//		$m = new Manager($config);
	//		$m->registerEncryptionModule($em);
	//		$this->assertTrue($m->isEnabled());
	//		$m->unregisterEncryptionModule($em);
	//		$this->assertFalse($m->isEnabled());
	//	}
	//
	//	/**
	//	 * @expectedException \OC\Encryption\Exceptions\ModuleDoesNotExistsException
	//	 * @expectedExceptionMessage Module with ID: unknown does not exist.
	//	 */
	//	public function testGetEncryptionModuleUnknown() {
	//		$config = $this->createMock(IConfig::class);
	//		$config->expects($this->any())->method('getSystemValueBool')->willReturn(true);
	//		$em = $this->createMock(IEncryptionModule::class);
	//		$em->expects($this->any())->method('getId')->willReturn(0);
	//		$em->expects($this->any())->method('getDisplayName')->willReturn('TestDummyModule0');
	//		$m = new Manager($config);
	//		$m->registerEncryptionModule($em);
	//		$this->assertTrue($m->isEnabled());
	//		$m->getEncryptionModule('unknown');
	//	}
	//
	//	public function testGetEncryptionModule() {
	//		$config = $this->createMock(IConfig::class);
	//		$config->expects($this->any())->method('getSystemValueBool')->willReturn(true);
	//		$em = $this->createMock(IEncryptionModule::class);
	//		$em->expects($this->any())->method('getId')->willReturn(0);
	//		$em->expects($this->any())->method('getDisplayName')->willReturn('TestDummyModule0');
	//		$m = new Manager($config);
	//		$m->registerEncryptionModule($em);
	//		$this->assertTrue($m->isEnabled());
	//		$en0 = $m->getEncryptionModule(0);
	//		$this->assertEquals(0, $en0->getId());
	//	}

	protected function addNewEncryptionModule(Manager $manager, $id) {
		$encryptionModule = $this->createMock(IEncryptionModule::class);
		$encryptionModule->expects($this->any())
			->method('getId')
			->willReturn('ID' . $id);
		$encryptionModule->expects($this->any())
			->method('getDisplayName')
			->willReturn('TestDummyModule' . $id);
		/** @var \OCP\Encryption\IEncryptionModule $encryptionModule */
		$manager->registerEncryptionModule('ID' . $id, 'TestDummyModule' . $id, function () use ($encryptionModule) {
			return $encryptionModule;
		});
	}
}