<?php

/**
 * Chill is a software for social workers.
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

declare(strict_types=1);

/*
 * Chill is a software for social workers
 *
 * For the full copyright and license information, please view
 * the LICENSE file that was distributed with this source code.
 */

namespace Chill\CalendarBundle\Command;

use Chill\CalendarBundle\RemoteCalendar\Connector\MSGraph\EventsOnUserSubscriptionCreator;
use Chill\CalendarBundle\RemoteCalendar\Connector\MSGraph\MapCalendarToUser;
use Chill\CalendarBundle\RemoteCalendar\Connector\MSGraph\MSGraphUserRepository;
use DateInterval;
use DateTimeImmutable;
use Doctrine\ORM\EntityManagerInterface;
use Psr\Log\LoggerInterface;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputOption;
use Symfony\Component\Console\Output\OutputInterface;

class MapAndSubscribeUserCalendarCommand extends Command
{
    private EntityManagerInterface $em;

    private EventsOnUserSubscriptionCreator $eventsOnUserSubscriptionCreator;

    private LoggerInterface $logger;

    private MapCalendarToUser $mapCalendarToUser;

    private MSGraphUserRepository $userRepository;

    public function __construct(
        EntityManagerInterface $em,
        EventsOnUserSubscriptionCreator $eventsOnUserSubscriptionCreator,
        LoggerInterface $logger,
        MapCalendarToUser $mapCalendarToUser,
        MSGraphUserRepository $userRepository
    ) {
        parent::__construct('chill:calendar:msgraph-user-map-subscribe');

        $this->em = $em;
        $this->eventsOnUserSubscriptionCreator = $eventsOnUserSubscriptionCreator;
        $this->logger = $logger;
        $this->mapCalendarToUser = $mapCalendarToUser;
        $this->userRepository = $userRepository;
    }

    public function execute(InputInterface $input, OutputInterface $output): int
    {
        $this->logger->info(__CLASS__ . ' execute command');

        $limit = 50;
        $offset = 0;
        /** @var DateInterval $interval the interval before the end of the expiration */
        $interval = new DateInterval('P1D');
        $expiration = (new DateTimeImmutable('now'))->add(new DateInterval($input->getOption('subscription-duration')));
        $total = $this->userRepository->countByMostOldSubscriptionOrWithoutSubscriptionOrData($interval);
        $created = 0;
        $renewed = 0;

        $this->logger->info(__CLASS__ . ' the number of user to get - renew', [
            'total' => $total,
            'expiration' => $expiration->format(DateTimeImmutable::ATOM),
        ]);

        while ($offset < $total) {
            $users = $this->userRepository->findByMostOldSubscriptionOrWithoutSubscriptionOrData(
                $interval,
                $limit,
                $offset
            );

            foreach ($users as $user) {
                if (!$this->mapCalendarToUser->hasUserId($user)) {
                    $this->mapCalendarToUser->writeMetadata($user);
                }

                if ($this->mapCalendarToUser->hasUserId($user)) {
                    // we first try to renew an existing subscription, if any.
                    // if not, or if it fails, we try to create a new one
                    if ($this->mapCalendarToUser->hasActiveSubscription($user)) {
                        $this->logger->debug(__CLASS__ . ' renew a subscription for', [
                            'userId' => $user->getId(),
                            'username' => $user->getUsernameCanonical(),
                        ]);

                        ['secret' => $secret, 'id' => $id, 'expiration' => $expirationTs]
                            = $this->eventsOnUserSubscriptionCreator->renewSubscriptionForUser($user, $expiration);
                        $this->mapCalendarToUser->writeSubscriptionMetadata($user, $expirationTs, $id, $secret);

                        if (0 !== $expirationTs) {
                            ++$renewed;
                        } else {
                            $this->logger->warning(__CLASS__ . ' could not renew subscription for a user', [
                                'userId' => $user->getId(),
                                'username' => $user->getUsernameCanonical(),
                            ]);
                        }
                    }

                    if (!$this->mapCalendarToUser->hasActiveSubscription($user)) {
                        $this->logger->debug(__CLASS__ . ' create a subscription for', [
                            'userId' => $user->getId(),
                            'username' => $user->getUsernameCanonical(),
                        ]);

                        ['secret' => $secret, 'id' => $id, 'expiration' => $expirationTs]
                            = $this->eventsOnUserSubscriptionCreator->createSubscriptionForUser($user, $expiration);
                        $this->mapCalendarToUser->writeSubscriptionMetadata($user, $expirationTs, $id, $secret);

                        if (0 !== $expirationTs) {
                            ++$created;
                        } else {
                            $this->logger->warning(__CLASS__ . ' could not create subscription for a user', [
                                'userId' => $user->getId(),
                                'username' => $user->getUsernameCanonical(),
                            ]);
                        }
                    }
                }

                ++$offset;
            }

            $this->em->flush();
            $this->em->clear();
        }

        $this->logger->warning(__CLASS__ . ' process executed', [
            'created' => $created,
            'renewed' => $renewed,
        ]);

        return 0;
    }

    protected function configure()
    {
        parent::configure();

        $this
            ->setDescription('MSGraph: collect user metadata and create subscription on events for users')
            ->addOption(
                'renew-before-end-interval',
                'r',
                InputOption::VALUE_OPTIONAL,
                'delay before renewing subscription',
                'P1D'
            )
            ->addOption(
                'subscription-duration',
                's',
                InputOption::VALUE_OPTIONAL,
                'duration for the subscription',
                'PT4230M'
            );
    }
}