<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

namespace OCA\Social\Interfaces\Object;

use Exception;
use OCA\Social\AP;
use OCA\Social\Db\ActionsRequest;
use OCA\Social\Db\StreamRequest;
use OCA\Social\Exceptions\ActionDoesNotExistException;
use OCA\Social\Exceptions\InvalidOriginException;
use OCA\Social\Exceptions\InvalidResourceException;
use OCA\Social\Exceptions\ItemNotFoundException;
use OCA\Social\Exceptions\ItemUnknownException;
use OCA\Social\Exceptions\RedundancyLimitException;
use OCA\Social\Exceptions\SocialAppConfigException;
use OCA\Social\Exceptions\StreamNotFoundException;
use OCA\Social\Exceptions\UnauthorizedFediverseException;
use OCA\Social\Interfaces\Activity\AbstractActivityPubInterface;
use OCA\Social\Interfaces\IActivityPubInterface;
use OCA\Social\Interfaces\Internal\SocialAppNotificationInterface;
use OCA\Social\Model\ActivityPub\ACore;
use OCA\Social\Model\ActivityPub\Activity\Undo;
use OCA\Social\Model\ActivityPub\Actor\Person;
use OCA\Social\Model\ActivityPub\Internal\SocialAppNotification;
use OCA\Social\Model\ActivityPub\Object\Announce;
use OCA\Social\Model\ActivityPub\Stream;
use OCA\Social\Model\StreamQueue;
use OCA\Social\Service\CacheActorService;
use OCA\Social\Service\MiscService;
use OCA\Social\Service\StreamQueueService;
use OCA\Social\Tools\Exceptions\CacheItemNotFoundException;
use OCA\Social\Tools\Exceptions\MalformedArrayException;
use OCA\Social\Tools\Exceptions\RequestContentException;
use OCA\Social\Tools\Exceptions\RequestNetworkException;
use OCA\Social\Tools\Exceptions\RequestResultNotJsonException;
use OCA\Social\Tools\Exceptions\RequestResultSizeException;
use OCA\Social\Tools\Exceptions\RequestServerException;
use OCA\Social\Tools\Traits\TArrayTools;

/**
 * Class AnnounceInterface
 *
 * @package OCA\Social\Interfaces\Object
 */
class AnnounceInterface extends AbstractActivityPubInterface implements IActivityPubInterface {
	use TArrayTools;

	private StreamRequest $streamRequest;
	private ActionsRequest $actionsRequest;
	private StreamQueueService $streamQueueService;
	private CacheActorService $cacheActorService;
	private MiscService $miscService;

	public function __construct(
		StreamRequest $streamRequest, ActionsRequest $actionsRequest,
		StreamQueueService $streamQueueService, CacheActorService $cacheActorService,
		MiscService $miscService,
	) {
		$this->streamRequest = $streamRequest;
		$this->actionsRequest = $actionsRequest;
		$this->streamQueueService = $streamQueueService;
		$this->cacheActorService = $cacheActorService;
		$this->miscService = $miscService;
	}

	/**
	 * @throws InvalidOriginException
	 * @throws Exception
	 */
	public function processIncomingRequest(ACore $item): void {
		/** @var ACore $item */
		$item->checkOrigin($item->getId());
		$item->checkOrigin($item->getActorId());

		$this->save($item);
	}


	/**
	 * @throws InvalidOriginException
	 * @throws InvalidResourceException
	 * @throws MalformedArrayException
	 * @throws RedundancyLimitException
	 * @throws RequestContentException
	 * @throws RequestNetworkException
	 * @throws RequestResultNotJsonException
	 * @throws RequestResultSizeException
	 * @throws RequestServerException
	 * @throws UnauthorizedFediverseException
	 */
	public function activity(Acore $activity, ACore $item): void {
		/** @var Announce $announce */
		$announce = $item;
		if ($activity->getType() === Undo::TYPE) {
			$activity->checkOrigin($announce->getId());
			$activity->checkOrigin($announce->getActorId());

			$this->delete($announce);
		}
	}

	/**
	 * @throws ItemNotFoundException
	 */
	public function getItem(ACore $item): ACore {
		throw new ItemNotFoundException();
	}

	/**
	 * @throws ItemNotFoundException
	 */
	public function getItemById(string $id): ACore {
		throw new ItemNotFoundException();
	}


	/**
	 * @throws Exception
	 */
	public function save(ACore $item): void {
		/** @var Announce $item */
		if ($item->hasActor()) {
			$actor = $item->getActor();
		} else {
			$actor = $this->cacheActorService->getFromId($item->getActorId());
		}

		try {
			$knownItem = $this->streamRequest->getStreamByObjectId($item->getObjectId(), Announce::TYPE);

			$knownItem->setAttributedTo($actor->getId());
			if (!$knownItem->hasCc($actor->getFollowers())) {
				$knownItem->addCc($actor->getFollowers());
				$this->streamRequest->update($knownItem, true);
			}
		} catch (StreamNotFoundException $e) {
			$objectId = $item->getObjectId();
			$item->addCacheItem($objectId);
			$item->setAttributedTo($item->getActorId());
			$this->streamRequest->save($item);

			$this->streamQueueService->generateStreamQueue(
				$item->getRequestToken(), StreamQueue::TYPE_CACHE, $item->getId()
			);
		}

		try {
			$post = $this->streamRequest->getStreamById($item->getObjectId(), false, ACore::FORMAT_LOCAL);
		} catch (StreamNotFoundException $e) {
			return; // should not happen.
		}

		try {
			$this->actionsRequest->getActionFromItem($item);
		} catch (ActionDoesNotExistException $e) {
			$this->actionsRequest->save($item);
		}

		$this->updateDetails($post);
		$this->generateNotification($post, $actor);
	}


	/**
	 * @throws InvalidOriginException
	 * @throws InvalidResourceException
	 * @throws RedundancyLimitException
	 * @throws RequestContentException
	 * @throws RequestNetworkException
	 * @throws RequestResultNotJsonException
	 * @throws RequestResultSizeException
	 * @throws RequestServerException
	 * @throws UnauthorizedFediverseException
	 * @throws MalformedArrayException
	 */
	public function delete(ACore $item): void {
		try {
			$knownItem =
				$this->streamRequest->getStreamByObjectId($item->getObjectId(), Announce::TYPE);

			if ($item->hasActor()) {
				$actor = $item->getActor();
			} else {
				$actor = $this->cacheActorService->getFromId($item->getActorId());
			}

			$knownItem->removeCc($actor->getFollowers());

			if (empty($knownItem->getCcArray())) {
				$this->streamRequest->deleteById($knownItem->getId(), Announce::TYPE);
			} else {
				$this->streamRequest->update($knownItem, true);
			}
		} catch (StreamNotFoundException|ItemUnknownException|SocialAppConfigException $e) {
		}

		$this->undoAnnounceAction($item);
	}

	public function event(ACore $item, string $source): void {
		return;
		/** @var Stream $item */
		switch ($source) {
			// do we still need this ?
			case 'updateCache':
				$objectId = $item->getObjectId();
				try {
					$cachedItem = $item->getCache()
						->getItem($objectId);
				} catch (CacheItemNotFoundException $e) {
					return;
				}

				try {
					if ($item->hasActor()) {
						$actor = $item->getActor();
					} else {
						$actor = $this->cacheActorService->getFromId($item->getActorId());
					}

					$post = $this->streamRequest->getStreamById(
						$item->getObjectId(),
						false,
						ACore::FORMAT_LOCAL
					);
					$this->updateDetails($post);
					$this->generateNotification($post, $actor);
				} catch (Exception $e) {
				}

				break;
		}
	}

	private function undoAnnounceAction(ACore $announce): void {
		try {
			$this->actionsRequest->getActionFromItem($announce);
			$this->actionsRequest->delete($announce);
		} catch (ActionDoesNotExistException $e) {
		}

		try {
			if ($announce->hasActor()) {
				$actor = $announce->getActor();
			} else {
				$actor = $this->cacheActorService->getFromId($announce->getActorId());
			}

			$post = $this->streamRequest->getStreamById($announce->getObjectId());
			$this->updateDetails($post);
			$this->cancelNotification($post, $actor);
		} catch (Exception $e) {
		}
	}

	private function updateDetails(Stream $post): void {
		$post->setDetailInt(
			'boosts', $this->actionsRequest->countActions($post->getId(), Announce::TYPE)
		);

		$this->streamRequest->updateDetails($post);
	}

	/**
	 * @throws ItemUnknownException
	 * @throws SocialAppConfigException
	 */
	private function generateNotification(Stream $post, Person $author): void {
		if (!$post->isLocal()) {
			return;
		}

		/** @var SocialAppNotificationInterface $notificationInterface */
		$notificationInterface =
			AP::$activityPub->getInterfaceFromType(SocialAppNotification::TYPE);

		try {
			$notification = $this->streamRequest->getStreamByObjectId(
				$post->getId(), SocialAppNotification::TYPE, Announce::TYPE
			);

			$notification->addDetail('accounts', $author->getAccount());
			$notificationInterface->update($notification);
		} catch (StreamNotFoundException $e) {
			/** @var SocialAppNotification $notification */
			$notification = AP::$activityPub->getItemFromType(SocialAppNotification::TYPE);
			//			$notification->setDetail('url', '');

			$notification->setDetailItem('post', $post);
			$notification->addDetail('accounts', $author->getAccount());
			$notification->setAttributedTo($author->getId())
				->setSubType(Announce::TYPE)
				->setId($post->getId() . '/notification+boost')
				->setSummary('{accounts} boosted your post')
				->setObjectId($post->getId())
				->setTo($post->getAttributedTo())
				->setLocal(true);

			$notificationInterface->save($notification);
		}
	}


	/**
	 * @throws ItemUnknownException
	 * @throws SocialAppConfigException
	 */
	private function cancelNotification(Stream $post, Person $author): void {
		if (!$post->isLocal()) {
			return;
		}

		/** @var SocialAppNotificationInterface $notificationInterface */
		$notificationInterface =
			AP::$activityPub->getInterfaceFromType(SocialAppNotification::TYPE);

		try {
			$notification = $this->streamRequest->getStreamByObjectId(
				$post->getId(), SocialAppNotification::TYPE, Announce::TYPE
			);

			$notification->removeDetail('accounts', $author->getAccount());
			if (empty($notification->getDetails('accounts'))) {
				$notificationInterface->delete($notification);
			} else {
				$notificationInterface->update($notification);
			}
		} catch (StreamNotFoundException $e) {
		}
	}
}