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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2019 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\Console;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Access\Access;
use Joomla\CMS\Factory;
use Joomla\CMS\User\User;
use Joomla\CMS\User\UserHelper;
use Joomla\Console\Command\AbstractCommand;
use Joomla\Database\ParameterType;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;


/**
 * Console command for deleting a user
 *
 * @since  4.0.0
 */
class DeleteUserCommand extends AbstractCommand
{
	/**
	 * The default command name
	 *
	 * @var    string
	 * @since  4.0.0
	 */
	protected static $defaultName = 'user:delete';

	/**
	 * SymfonyStyle Object
	 * @var   object
	 * @since 4.0.0
	 */
	private $ioStyle;

	/**
	 * Stores the Input Object
	 * @var   object
	 * @since 4.0.0
	 */
	private $cliInput;

	/**
	 * The username
	 *
	 * @var    string
	 *
	 * @since  4.0.0
	 */
	private $username;

	/**
	 * Internal function to execute the command.
	 *
	 * @param   InputInterface   $input   The input to inject into the command.
	 * @param   OutputInterface  $output  The output to inject into the command.
	 *
	 * @return  integer  The command exit code
	 *
	 * @since   4.0.0
	 */
	protected function doExecute(InputInterface $input, OutputInterface $output): int
	{
		$this->configureIO($input, $output);

		$this->ioStyle->title('Delete users');

		$this->username = $this->getStringFromOption('username', 'Please enter a username');

		$userId = UserHelper::getUserId($this->username);
		$db = Factory::getDbo();

		if (empty($userId))
		{
			$this->ioStyle->error($this->username . ' does not exist!');

			return Command::FAILURE;
		}

		if ($input->isInteractive() && !$this->ioStyle->confirm('Are you sure you want to delete this user?', false))
		{
			$this->ioStyle->note('User not deleted');

			return Command::SUCCESS;
		}

		$groups = UserHelper::getUserGroups($userId);
		$user = User::getInstance($userId);

		if ($user->block == 0)
		{
			foreach ($groups as $groupId)
			{
				if (Access::checkGroup($groupId, 'core.admin'))
				{
					$queryUser = $db->getQuery(true);
					$queryUser->select('COUNT(*)')
						->from($db->quoteName('#__users', 'u'))
						->leftJoin(
							$db->quoteName('#__user_usergroup_map', 'g'),
							'(' . $db->quoteName('u.id') . ' = ' . $db->quoteName('g.user_id') . ')'
						)
						->where($db->quoteName('g.group_id') . " = :groupId")
						->where($db->quoteName('u.block') . " = 0")
						->bind(':groupId', $groupId, ParameterType::INTEGER);

					$db->setQuery($queryUser);
					$activeSuperUser = $db->loadResult();

					if ($activeSuperUser < 2)
					{
						$this->ioStyle->error("You can't delete the last active Super User");

						return Command::FAILURE;
					}
				}
			}
		}

		// Trigger delete of user
		$result = $user->delete();

		if (!$result)
		{
			$this->ioStyle->error("Can't remove " . $this->username . ' from usertable');

			return Command::FAILURE;
		}

		$this->ioStyle->success('User ' . $this->username . ' deleted!');

		return Command::SUCCESS;
	}

	/**
	 * Method to get a value from option
	 *
	 * @param   string  $option    set the option name
	 *
	 * @param   string  $question  set the question if user enters no value to option
	 *
	 * @return  string
	 *
	 * @since   4.0.0
	 */
	protected function getStringFromOption($option, $question): string
	{
		$answer = (string) $this->getApplication()->getConsoleInput()->getOption($option);

		while (!$answer)
		{
			$answer = (string) $this->ioStyle->ask($question);
		}

		return $answer;
	}

	/**
	 * Configure the IO.
	 *
	 * @param   InputInterface   $input   The input to inject into the command.
	 * @param   OutputInterface  $output  The output to inject into the command.
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 */
	private function configureIO(InputInterface $input, OutputInterface $output)
	{
		$this->cliInput = $input;
		$this->ioStyle = new SymfonyStyle($input, $output);
	}

	/**
	 * Configure the command.
	 *
	 * @return  void
	 *
	 * @since   4.0.0
	 */
	protected function configure(): void
	{
		$help = "<info>%command.name%</info> deletes a user
		\nUsage: <info>php %command.full_name%</info>";

		$this->setDescription('Delete a user');
		$this->addOption('username', null, InputOption::VALUE_OPTIONAL, 'username');
		$this->setHelp($help);
	}
}