<?php
/**
 * Copyright (c) 2014 Morris Jobke <hey@morrisjobke.de>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */

namespace Test;
use OCP\IDBConnection;
use PHPUnit\Framework\MockObject\MockObject;
use Symfony\Component\EventDispatcher\EventDispatcher;
use Symfony\Component\EventDispatcher\GenericEvent;
use OC\SystemConfig;

/**
 * Class AllConfigTest
 *
 * @group DB
 *
 * @package Test
 */
class AllConfigTest extends TestCase {
	/** @var  IDBConnection */
	protected $connection;

	/** @var EventDispatcher | MockObject*/
	protected $eventDispatcher;

	protected function getConfig($systemConfig = null, $connection = null) {
		$this->eventDispatcher = $this->createMock(EventDispatcher::class);

		if ($this->connection === null) {
			$this->connection = \OC::$server->getDatabaseConnection();
		}
		if ($systemConfig === null) {
			$systemConfig = $this->getMockBuilder(SystemConfig::class)
				->disableOriginalConstructor()
				->getMock();
		}
		return new \OC\AllConfig($systemConfig, $this->eventDispatcher);
	}

	public function testDeleteUserValue() {
		$config = $this->getConfig();

		// preparation - add something to the database
		$this->connection->executeUpdate(
			'INSERT INTO `*PREFIX*preferences` (`userid`, `appid`, ' .
			'`configkey`, `configvalue`) VALUES (?, ?, ?, ?)',
			['userDelete', 'appDelete', 'keyDelete', 'valueDelete']
		);

		$config->deleteUserValue('userDelete', 'appDelete', 'keyDelete');

		$result = $this->connection->executeQuery(
			'SELECT COUNT(*) AS `count` FROM `*PREFIX*preferences` WHERE `userid` = ?',
			['userDelete']
		)->fetch();
		$actualCount = $result['count'];

		$this->assertEquals(0, $actualCount, 'There was one value in the database and after the tests there should be no entry left.');
	}

	public function testSetUserValue() {
		$selectAllSQL = 'SELECT `userid`, `appid`, `configkey`, `configvalue` FROM `*PREFIX*preferences` WHERE `userid` = ?';
		$config = $this->getConfig();

		$event = new GenericEvent(
			null,
			[
				'uid' => 'userSet', 'key' => 'keySet', 'value' => 'valueSet',
				'app' => 'appSet', 'precondition' => null
			]
		);
		$event2 = new GenericEvent(
			null,
			[
				'uid' => 'userSet', 'key' => 'keySet', 'value' => 'valueSet2',
				'app' => 'appSet', 'precondition' => null
			]
		);
		$event3 = new GenericEvent(null, [
			'uid' => 'userSet', 'key' => 'keySet', 'app' => 'appSet'
		]);

		$this->eventDispatcher->expects($this->exactly(6))
			->method('dispatch')
			->withConsecutive(
				[$this->equalTo($event), $this->equalTo('userpreferences.beforeSetValue')],
				[$this->equalTo($event), $this->equalTo('userpreferences.afterSetValue')],
				[$this->equalTo($event2), $this->equalTo('userpreferences.beforeSetValue')],
				[$this->equalTo($event2), $this->equalTo('userpreferences.afterSetValue')],
				[$this->equalTo($event3), $this->equalTo('userpreferences.beforeDeleteValue')],
				[$this->equalTo($event3), $this->equalTo('userpreferences.afterDeleteValue')]
			);

		$config->setUserValue('userSet', 'appSet', 'keySet', 'valueSet');

		$result = $this->connection->executeQuery($selectAllSQL, ['userSet'])->fetchAll();

		$this->assertCount(1, $result);
		$this->assertEquals([
			'userid'      => 'userSet',
			'appid'       => 'appSet',
			'configkey'   => 'keySet',
			'configvalue' => 'valueSet'
		], $result[0]);

		// test if the method overwrites existing database entries
		$config->setUserValue('userSet', 'appSet', 'keySet', 'valueSet2');

		$result = $this->connection->executeQuery($selectAllSQL, ['userSet'])->fetchAll();

		$this->assertCount(1, $result);
		$this->assertEquals([
			'userid'      => 'userSet',
			'appid'       => 'appSet',
			'configkey'   => 'keySet',
			'configvalue' => 'valueSet2'
		], $result[0]);

		// cleanup - it therefore relies on the successful execution of the previous test
		$config->deleteUserValue('userSet', 'appSet', 'keySet');
	}

	public function testSetUserValueWithPreCondition() {
		$config = $this->getConfig();

		$selectAllSQL = 'SELECT `userid`, `appid`, `configkey`, `configvalue` FROM `*PREFIX*preferences` WHERE `userid` = ?';

		$config->setUserValue('userPreCond', 'appPreCond', 'keyPreCond', 'valuePreCond');

		$result = $this->connection->executeQuery($selectAllSQL, ['userPreCond'])->fetchAll();

		$this->assertCount(1, $result);
		$this->assertEquals([
			'userid'      => 'userPreCond',
			'appid'       => 'appPreCond',
			'configkey'   => 'keyPreCond',
			'configvalue' => 'valuePreCond'
		], $result[0]);

		// test if the method overwrites existing database entries with valid precond
		$config->setUserValue('userPreCond', 'appPreCond', 'keyPreCond', 'valuePreCond2', 'valuePreCond');

		$result = $this->connection->executeQuery($selectAllSQL, ['userPreCond'])->fetchAll();

		$this->assertCount(1, $result);
		$this->assertEquals([
			'userid'      => 'userPreCond',
			'appid'       => 'appPreCond',
			'configkey'   => 'keyPreCond',
			'configvalue' => 'valuePreCond2'
		], $result[0]);

		// cleanup
		$config->deleteUserValue('userPreCond', 'appPreCond', 'keyPreCond');
	}

	public function dataSetUserValueUnexpectedValue() {
		return [
			[true],
			[false],
			[null],
			[new \stdClass()],
		];
	}

	/**
	 * @dataProvider dataSetUserValueUnexpectedValue
	 * @param mixed $value
	 */
	public function testSetUserValueUnexpectedValue($value) {
		$this->expectException(\UnexpectedValueException::class);

		$config = $this->getConfig();
		$config->setUserValue('userSetBool', 'appSetBool', 'keySetBool', $value);
	}

	/**
	 */
	public function testSetUserValueWithPreConditionFailure() {
		$this->expectException(\OCP\PreConditionNotMetException::class);

		$config = $this->getConfig();

		$selectAllSQL = 'SELECT `userid`, `appid`, `configkey`, `configvalue` FROM `*PREFIX*preferences` WHERE `userid` = ?';

		$config->setUserValue('userPreCond1', 'appPreCond', 'keyPreCond', 'valuePreCond');

		$result = $this->connection->executeQuery($selectAllSQL, ['userPreCond1'])->fetchAll();

		$this->assertCount(1, $result);
		$this->assertEquals([
			'userid'      => 'userPreCond1',
			'appid'       => 'appPreCond',
			'configkey'   => 'keyPreCond',
			'configvalue' => 'valuePreCond'
		], $result[0]);

		// test if the method overwrites existing database entries with valid precond
		$config->setUserValue('userPreCond1', 'appPreCond', 'keyPreCond', 'valuePreCond2', 'valuePreCond3');

		$result = $this->connection->executeQuery($selectAllSQL, ['userPreCond1'])->fetchAll();

		$this->assertCount(1, $result);
		$this->assertEquals([
			'userid'      => 'userPreCond1',
			'appid'       => 'appPreCond',
			'configkey'   => 'keyPreCond',
			'configvalue' => 'valuePreCond'
		], $result[0]);

		// cleanup
		$config->deleteUserValue('userPreCond1', 'appPreCond', 'keyPreCond');
	}

	public function testSetUserValueUnchanged() {
		// TODO - FIXME until the dependency injection is handled properly (in AllConfig)
		$this->markTestSkipped('Skipped because this is just testable if database connection can be injected');

		$resultMock = $this->getMockBuilder('\Doctrine\DBAL\Driver\Statement')
			->disableOriginalConstructor()->getMock();
		$resultMock->expects($this->once())
			->method('fetchColumn')
			->will($this->returnValue('valueSetUnchanged'));

		$connectionMock = $this->createMock('\OCP\IDBConnection');
		$connectionMock->expects($this->once())
			->method('executeQuery')
			->with(
				$this->equalTo('SELECT `configvalue` FROM `*PREFIX*preferences` '.
				'WHERE `userid` = ? AND `appid` = ? AND `configkey` = ?'),
				$this->equalTo(['userSetUnchanged', 'appSetUnchanged', 'keySetUnchanged'])
			)
			->will($this->returnValue($resultMock));
		$connectionMock->expects($this->never())
			->method('executeUpdate');

		$config = $this->getConfig(null, $connectionMock);

		$config->setUserValue('userSetUnchanged', 'appSetUnchanged', 'keySetUnchanged', 'valueSetUnchanged');
	}

	public function testGetUserValue() {
		$config = $this->getConfig();

		// setup - it therefore relies on the successful execution of the previous test
		$config->setUserValue('userGet', 'appGet', 'keyGet', 'valueGet');
		$value = $config->getUserValue('userGet', 'appGet', 'keyGet');

		$this->assertEquals('valueGet', $value);

		$result = $this->connection->executeQuery(
			'SELECT `userid`, `appid`, `configkey`, `configvalue` FROM `*PREFIX*preferences` WHERE `userid` = ?',
			['userGet']
		)->fetchAll();

		$this->assertCount(1, $result);
		$this->assertEquals([
			'userid'      => 'userGet',
			'appid'       => 'appGet',
			'configkey'   => 'keyGet',
			'configvalue' => 'valueGet'
		], $result[0]);

		// drop data from database - but the config option should be cached in the config object
		$this->connection->executeUpdate('DELETE FROM `*PREFIX*preferences` WHERE `userid` = ?', ['userGet']);

		// testing the caching mechanism
		$value = $config->getUserValue('userGet', 'appGet', 'keyGet');

		$this->assertEquals('valueGet', $value);

		$result = $this->connection->executeQuery(
			'SELECT `userid`, `appid`, `configkey`, `configvalue` FROM `*PREFIX*preferences` WHERE `userid` = ?',
			['userGet']
		)->fetchAll();

		$this->assertCount(0, $result);
	}

	public function testGetUserKeys() {
		$config = $this->getConfig();

		// preparation - add something to the database
		$data = [
			['userFetch', 'appFetch1', 'keyFetch1', 'value1'],
			['userFetch', 'appFetch1', 'keyFetch2', 'value2'],
			['userFetch', 'appFetch2', 'keyFetch3', 'value3'],
			['userFetch', 'appFetch1', 'keyFetch4', 'value4'],
			['userFetch', 'appFetch4', 'keyFetch1', 'value5'],
			['userFetch', 'appFetch5', 'keyFetch1', 'value6'],
			['userFetch2', 'appFetch', 'keyFetch1', 'value7']
		];
		foreach ($data as $entry) {
			$this->connection->executeUpdate(
				'INSERT INTO `*PREFIX*preferences` (`userid`, `appid`, ' .
				'`configkey`, `configvalue`) VALUES (?, ?, ?, ?)',
				$entry
			);
		}

		$value = $config->getUserKeys('userFetch', 'appFetch1');
		$this->assertEquals(['keyFetch1', 'keyFetch2', 'keyFetch4'], $value);

		$value = $config->getUserKeys('userFetch2', 'appFetch');
		$this->assertEquals(['keyFetch1'], $value);

		// cleanup
		$this->connection->executeUpdate('DELETE FROM `*PREFIX*preferences`');
	}

	public function testGetUserValueDefault() {
		$config = $this->getConfig();

		$this->assertEquals('', $config->getUserValue('userGetUnset', 'appGetUnset', 'keyGetUnset'));
		$this->assertNull($config->getUserValue('userGetUnset', 'appGetUnset', 'keyGetUnset', null));
		$this->assertEquals('foobar', $config->getUserValue('userGetUnset', 'appGetUnset', 'keyGetUnset', 'foobar'));
	}

	public function testGetUserValueForUsers() {
		$config = $this->getConfig();

		// preparation - add something to the database
		$data = [
			['userFetch1', 'appFetch2', 'keyFetch1', 'value1'],
			['userFetch2', 'appFetch2', 'keyFetch1', 'value2'],
			['userFetch3', 'appFetch2', 'keyFetch1', 3],
			['userFetch4', 'appFetch2', 'keyFetch1', 'value4'],
			['userFetch5', 'appFetch2', 'keyFetch1', 'value5'],
			['userFetch6', 'appFetch2', 'keyFetch1', 'value6'],
			['userFetch7', 'appFetch2', 'keyFetch1', 'value7']
		];
		foreach ($data as $entry) {
			$this->connection->executeUpdate(
				'INSERT INTO `*PREFIX*preferences` (`userid`, `appid`, ' .
				'`configkey`, `configvalue`) VALUES (?, ?, ?, ?)',
				$entry
			);
		}

		$value = $config->getUserValueForUsers(
			'appFetch2',
			'keyFetch1',
			['userFetch1', 'userFetch2', 'userFetch3', 'userFetch5']
		);
		$this->assertEquals([
			'userFetch1' => 'value1',
			'userFetch2' => 'value2',
			'userFetch3' => 3,
			'userFetch5' => 'value5'
		], $value);

		$value = $config->getUserValueForUsers(
			'appFetch2',
			'keyFetch1',
			['userFetch1', 'userFetch4', 'userFetch9']
		);
		$this->assertEquals([
			'userFetch1' => 'value1',
			'userFetch4' => 'value4'
		], $value, 'userFetch9 is an nonexistent user and should not be shown.');

		// cleanup
		$this->connection->executeUpdate('DELETE FROM `*PREFIX*preferences`');
	}

	public function testDeleteAllUserValues() {
		$config = $this->getConfig();

		// preparation - add something to the database
		$data = [
			['userFetch3', 'appFetch1', 'keyFetch1', 'value1'],
			['userFetch3', 'appFetch1', 'keyFetch2', 'value2'],
			['userFetch3', 'appFetch2', 'keyFetch3', 'value3'],
			['userFetch3', 'appFetch1', 'keyFetch4', 'value4'],
			['userFetch3', 'appFetch4', 'keyFetch1', 'value5'],
			['userFetch3', 'appFetch5', 'keyFetch1', 'value6'],
			['userFetch4', 'appFetch2', 'keyFetch1', 'value7']
		];
		foreach ($data as $entry) {
			$this->connection->executeUpdate(
				'INSERT INTO `*PREFIX*preferences` (`userid`, `appid`, ' .
				'`configkey`, `configvalue`) VALUES (?, ?, ?, ?)',
				$entry
			);
		}

		$event = new GenericEvent(null, ['uid' => 'userFetch3']);
		$this->eventDispatcher->expects($this->exactly(2))
			->method('dispatch')
			->withConsecutive(
				[$this->equalTo($event), $this->equalTo('userpreferences.beforeDeleteUser')],
				[$this->equalTo($event), $this->equalTo('userpreferences.afterDeleteUser')]
			);

		$config->deleteAllUserValues('userFetch3');

		$result = $this->connection->executeQuery(
			'SELECT COUNT(*) AS `count` FROM `*PREFIX*preferences`'
		)->fetch();
		$actualCount = $result['count'];

		$this->assertEquals(1, $actualCount, 'After removing `userFetch3` there should be exactly 1 entry left.');

		// cleanup
		$this->connection->executeUpdate('DELETE FROM `*PREFIX*preferences`');
	}

	public function testDeleteAppFromAllUsers() {
		$config = $this->getConfig();

		// preparation - add something to the database
		$data = [
			['userFetch5', 'appFetch1', 'keyFetch1', 'value1'],
			['userFetch5', 'appFetch1', 'keyFetch2', 'value2'],
			['userFetch5', 'appFetch2', 'keyFetch3', 'value3'],
			['userFetch5', 'appFetch1', 'keyFetch4', 'value4'],
			['userFetch5', 'appFetch4', 'keyFetch1', 'value5'],
			['userFetch5', 'appFetch5', 'keyFetch1', 'value6'],
			['userFetch6', 'appFetch2', 'keyFetch1', 'value7']
		];
		foreach ($data as $entry) {
			$this->connection->executeUpdate(
				'INSERT INTO `*PREFIX*preferences` (`userid`, `appid`, ' .
				'`configkey`, `configvalue`) VALUES (?, ?, ?, ?)',
				$entry
			);
		}

		$this->eventDispatcher->expects($this->exactly(4))
			->method('dispatch')
			->withConsecutive(
				[$this->equalTo(new GenericEvent(null, ['app' => 'appFetch1'])), $this->equalTo('userpreferences.beforeDeleteApp')],
				[$this->equalTo(new GenericEvent(null, ['app' => 'appFetch1'])), $this->equalTo('userpreferences.afterDeleteApp')],
				[$this->equalTo(new GenericEvent(null, ['app' => 'appFetch2'])), $this->equalTo('userpreferences.beforeDeleteApp')],
				[$this->equalTo(new GenericEvent(null, ['app' => 'appFetch2'])), $this->equalTo('userpreferences.afterDeleteApp')]
			);

		$config->deleteAppFromAllUsers('appFetch1');

		$result = $this->connection->executeQuery(
			'SELECT COUNT(*) AS `count` FROM `*PREFIX*preferences`'
		)->fetch();
		$actualCount = $result['count'];

		$this->assertEquals(4, $actualCount, 'After removing `appFetch1` there should be exactly 4 entries left.');

		$config->deleteAppFromAllUsers('appFetch2');

		$result = $this->connection->executeQuery(
			'SELECT COUNT(*) AS `count` FROM `*PREFIX*preferences`'
		)->fetch();
		$actualCount = $result['count'];

		$this->assertEquals(2, $actualCount, 'After removing `appFetch2` there should be exactly 2 entries left.');

		// cleanup
		$this->connection->executeUpdate('DELETE FROM `*PREFIX*preferences`');
	}

	public function testGetUsersForUserValue() {
		// mock the check for the database to run the correct SQL statements for each database type
		$systemConfig = $this->getMockBuilder('\OC\SystemConfig')
			->disableOriginalConstructor()
			->getMock();
		$config = $this->getConfig($systemConfig);

		// preparation - add something to the database
		$data = [
			['user1', 'appFetch9', 'keyFetch9', 'value9'],
			['user2', 'appFetch9', 'keyFetch9', 'value9'],
			['user3', 'appFetch9', 'keyFetch9', 'value8'],
			['user4', 'appFetch9', 'keyFetch8', 'value9'],
			['user5', 'appFetch8', 'keyFetch9', 'value9'],
			['user6', 'appFetch9', 'keyFetch9', 'value9'],
		];
		foreach ($data as $entry) {
			$this->connection->executeUpdate(
				'INSERT INTO `*PREFIX*preferences` (`userid`, `appid`, ' .
				'`configkey`, `configvalue`) VALUES (?, ?, ?, ?)',
				$entry
			);
		}

		$value = $config->getUsersForUserValue('appFetch9', 'keyFetch9', 'value9');
		$this->assertEquals(['user1', 'user2', 'user6'], $value);

		// cleanup
		$this->connection->executeUpdate('DELETE FROM `*PREFIX*preferences`');
	}

	public function testGetUserKeysAllInts(): void {
		$config = $this->getConfig();

		// preparation - add something to the database
		$data = [
			['userFetch', 'appFetch1', '123', 'value'],
			['userFetch', 'appFetch1', '456', 'value'],
		];
		foreach ($data as $entry) {
			$this->connection->executeUpdate(
				'INSERT INTO `*PREFIX*preferences` (`userid`, `appid`, ' .
				'`configkey`, `configvalue`) VALUES (?, ?, ?, ?)',
				$entry
			);
		}

		$value = $config->getUserKeys('userFetch', 'appFetch1');
		$this->assertEquals(['123', '456'], $value);
		$this->assertIsString($value[0]);
		$this->assertIsString($value[1]);

		// cleanup
		$this->connection->executeUpdate('DELETE FROM `*PREFIX*preferences`');
	}
}
