<?php

declare(strict_types=1);


/**
 * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */


namespace OCA\Circles\Listeners\Files;

use Exception;
use OCA\Circles\AppInfo\Application;
use OCA\Circles\Events\AddingCircleMemberEvent;
use OCA\Circles\Exceptions\RequestBuilderException;
use OCA\Circles\Model\Member;
use OCA\Circles\Service\ConfigService;
use OCA\Circles\Service\ContactService;
use OCA\Circles\Service\ShareTokenService;
use OCA\Circles\Service\ShareWrapperService;
use OCA\Circles\Tools\Traits\TNCLogger;
use OCA\Circles\Tools\Traits\TStringTools;
use OCP\EventDispatcher\Event;
use OCP\EventDispatcher\IEventListener;

/** @template-implements IEventListener<AddingCircleMemberEvent|Event> */
class AddingMemberSendMail implements IEventListener {
	use TStringTools;
	use TNCLogger;


	/** @var ShareWrapperService */
	private $shareWrapperService;

	/** @var ShareTokenService */
	private $shareTokenService;

	/** @var ConfigService */
	private $configService;

	/** @var ContactService */
	private $contactService;

	public function __construct(
		ShareWrapperService $shareWrapperService,
		ShareTokenService $shareTokenService,
		ContactService $contactService,
		ConfigService $configService,
	) {
		$this->shareWrapperService = $shareWrapperService;
		$this->shareTokenService = $shareTokenService;
		$this->contactService = $contactService;
		$this->configService = $configService;

		$this->setup('app', Application::APP_ID);
	}


	/**
	 * @throws RequestBuilderException
	 */
	public function handle(Event $event): void {
		if (!$event instanceof AddingCircleMemberEvent) {
			return;
		}

		$member = $event->getMember();
		if ($member->getUserType() === Member::TYPE_CIRCLE) {
			$members = $member->getBasedOn()->getInheritedMembers();
		} else {
			$members = [$member];
		}

		$circle = $event->getCircle();
		$federatedEvent = $event->getFederatedEvent();
		$shares = $this->shareWrapperService->getSharesToCircle($circle->getSingleId());
		$hashedPasswords = $federatedEvent->getParams()->gArray('hashedPasswords');

		$result = [];
		foreach ($members as $member) {
			if ($member->getUserType() !== Member::TYPE_MAIL
				&& $member->getUserType() !== Member::TYPE_CONTACT
			) {
				continue;
			}

			$files = [];
			foreach ($shares as $share) {
				try {
					$shareToken = $this->shareTokenService->generateShareToken(
						$share,
						$member,
						$this->get($member->getSingleId(), $hashedPasswords)
					);
				} catch (Exception $e) {
					continue;
				}

				$share->setShareToken($shareToken);
				$files[] = clone $share;
			}

			$result[$member->getId()] = [
				'shares' => $files,
				'mails' => $this->contactService->getMailAddressesFromMember($member)
			];
		}

		$federatedEvent->addResultEntry('files', $result);
	}
}