<?php

declare(strict_types=1);

/**
 * @copyright Copyright (c) 2021 Thomas Citharel <nextcloud@tcit.fr>
 *
 * @author Thomas Citharel <nextcloud@tcit.fr>
 *
 * @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 OCA\DAV\Tests\unit\DAV\Migration;

use OCA\DAV\Migration\RemoveDeletedUsersCalendarSubscriptions;
use OCP\DB\IResult;
use OCP\DB\QueryBuilder\IExpressionBuilder;
use OCP\DB\QueryBuilder\IFunctionBuilder;
use OCP\DB\QueryBuilder\IParameter;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\DB\QueryBuilder\IQueryFunction;
use OCP\IDBConnection;
use OCP\IUserManager;
use OCP\Migration\IOutput;
use PHPUnit\Framework\MockObject\MockObject;
use Test\TestCase;

class RemoveDeletedUsersCalendarSubscriptionsTest extends TestCase {
	/**
	 * @var IDBConnection|MockObject
	 */
	private $dbConnection;
	/**
	 * @var IUserManager|MockObject
	 */
	private $userManager;

	/**
	 * @var IOutput|MockObject
	 */
	private $output;
	/**
	 * @var RemoveDeletedUsersCalendarSubscriptions
	 */
	private $migration;


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

		$this->dbConnection = $this->createMock(IDBConnection::class);
		$this->userManager = $this->createMock(IUserManager::class);
		$this->output = $this->createMock(IOutput::class);

		$this->migration = new RemoveDeletedUsersCalendarSubscriptions($this->dbConnection, $this->userManager);
	}

	public function testGetName(): void {
		$this->assertEquals(
			'Clean up old calendar subscriptions from deleted users that were not cleaned-up',
			$this->migration->getName()
		);
	}

	/**
	 * @dataProvider dataTestRun
	 * @param array $subscriptions
	 * @param array $userExists
	 * @param int $deletions
	 * @throws \Exception
	 */
	public function testRun(array $subscriptions, array $userExists, int $deletions): void {
		$qb = $this->createMock(IQueryBuilder::class);

		$qb->method('select')->willReturn($qb);

		$functionBuilder = $this->createMock(IFunctionBuilder::class);

		$qb->method('func')->willReturn($functionBuilder);
		$functionBuilder->method('count')->willReturn($this->createMock(IQueryFunction::class));

		$qb->method('selectDistinct')
			->with(['id', 'principaluri'])
			->willReturn($qb);

		$qb->method('from')
			->with('calendarsubscriptions')
			->willReturn($qb);

		$qb->method('setMaxResults')
			->willReturn($qb);

		$qb->method('setFirstResult')
			->willReturn($qb);

		$result = $this->createMock(IResult::class);

		$qb->method('execute')
			->willReturn($result);

		$result->expects($this->once())
			->method('fetchOne')
			->willReturn(count($subscriptions));

		$result
			->method('fetch')
			->willReturnOnConsecutiveCalls(...$subscriptions);

		$qb->method('delete')
			->with('calendarsubscriptions')
			->willReturn($qb);

		$expr = $this->createMock(IExpressionBuilder::class);

		$qb->method('expr')->willReturn($expr);
		$qb->method('createNamedParameter')->willReturn($this->createMock(IParameter::class));
		$qb->method('where')->willReturn($qb);
		// Only when user exists
		$qb->expects($this->exactly($deletions))->method('executeStatement');

		$this->dbConnection->method('getQueryBuilder')->willReturn($qb);


		$this->output->expects($this->once())->method('startProgress');

		$this->output->expects($subscriptions === [] ? $this->never(): $this->once())->method('advance');
		if (count($subscriptions)) {
			$this->userManager->method('userExists')
				->willReturnCallback(function (string $username) use ($userExists) {
					return $userExists[$username];
				});
		}
		$this->output->expects($this->once())->method('finishProgress');
		$this->output->expects($this->once())->method('info')->with(sprintf('%d calendar subscriptions without an user have been cleaned up', $deletions));

		$this->migration->run($this->output);
	}

	public function dataTestRun(): array {
		return [
			[[], [], 0],
			[[[
				'id' => 1,
				'principaluri' => 'users/principals/foo1',
			],
				[
					'id' => 2,
					'principaluri' => 'users/principals/bar1',
				],
				[
					'id' => 3,
					'principaluri' => 'users/principals/bar1',
				]], ['foo1' => true, 'bar1' => false], 2]
		];
	}
}