<?php
/************************************************************************
 * This file is part of EspoCRM.
 *
 * EspoCRM – Open Source CRM application.
 * Copyright (C) 2014-2024 Yurii Kuznietsov, Taras Machyshyn, Oleksii Avramenko
 * Website: https://www.espocrm.com
 *
 * 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 <https://www.gnu.org/licenses/>.
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License version 3.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License version 3,
 * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
 ************************************************************************/

namespace Espo\Tools\Notification;

use Espo\Core\Acl;
use Espo\Core\Exceptions\BadRequest;
use Espo\Core\Exceptions\Error;
use Espo\Core\Exceptions\Forbidden;
use Espo\Core\Name\Field;
use Espo\Core\Record\Collection as RecordCollection;
use Espo\Core\Select\SearchParams;
use Espo\Core\Select\SelectBuilderFactory;
use Espo\Core\Utils\Metadata;
use Espo\Entities\Note;
use Espo\Entities\Notification;
use Espo\Entities\User;
use Espo\ORM\EntityCollection;
use Espo\ORM\EntityManager;
use Espo\ORM\Name\Attribute;
use Espo\Tools\Stream\NoteAccessControl;

class RecordService
{
    public function __construct(
        private EntityManager $entityManager,
        private Acl $acl,
        private Metadata $metadata,
        private NoteAccessControl $noteAccessControl,
        private SelectBuilderFactory $selectBuilderFactory
    ) {}

    /**
     * Get notifications for a user.
     *
     * @return RecordCollection<Notification>
     * @throws Error
     * @throws BadRequest
     * @throws Forbidden
     */
    public function get(string $userId, SearchParams $searchParams): RecordCollection
    {
        $queryBuilder = $this->selectBuilderFactory
            ->create()
            ->from(Notification::ENTITY_TYPE)
            ->withSearchParams($searchParams)
            ->buildQueryBuilder()
            ->where(['userId' => $userId])
            ->order('number', SearchParams::ORDER_DESC);

        $offset = $searchParams->getOffset();
        $limit = $searchParams->getMaxSize();

        if ($limit) {
            $queryBuilder->limit($offset, $limit + 1);
        }

        $user = $this->entityManager
            ->getRDBRepositoryByClass(User::class)
            ->getById($userId);

        if (!$user) {
            throw new Error("User not found.");
        }

        $ignoreScopeList = $this->getIgnoreScopeList();

        if ($ignoreScopeList !== []) {
            $queryBuilder->where([
                'OR' => [
                    'relatedParentType' => null,
                    'relatedParentType!=' => $ignoreScopeList,
                ],
            ]);
        }

        $query = $queryBuilder->build();

        $collection = $this->entityManager
            ->getRDBRepositoryByClass(Notification::class)
            ->clone($query)
            ->find();

        if (!$collection instanceof EntityCollection) {
            throw new Error("Collection is not instance of EntityCollection.");
        }

        $ids = [];

        foreach ($collection as $k => $entity) {
            if ($k === $limit) {
                break;
            }

            $ids[] = $entity->getId();

            $this->prepareListItem($entity, $k, $collection, $limit, $user);
        }

        $collection = new EntityCollection([...$collection], Notification::ENTITY_TYPE);

        $this->markAsRead($ids);

        return RecordCollection::createNoCount($collection, $limit);
    }

    /**
     * @param string[] $ids
     */
    private function markAsRead(array $ids): void
    {
        if ($ids === []) {
            return;
        }

        $query = $this->entityManager
            ->getQueryBuilder()
            ->update()
            ->in(Notification::ENTITY_TYPE)
            ->set(['read' => true])
            ->where([Attribute::ID => $ids])
            ->build();

        $this->entityManager->getQueryExecutor()->execute($query);
    }

    /**
     * @param EntityCollection<Notification> $collection
     */
    private function prepareListItem(
        Notification $entity,
        int $index,
        EntityCollection $collection,
        int &$count,
        User $user
    ): void {

        $noteId = $this->getNoteId($entity);

        if (!$noteId) {
            return;
        }

        if (
            !in_array($entity->getType(), [
                Notification::TYPE_NOTE,
                Notification::TYPE_MENTION_IN_POST,
                Notification::TYPE_USER_REACTION,
            ])
        ) {
            return;
        }

        $note = $this->entityManager->getRDBRepositoryByClass(Note::class)->getById($noteId);

        if (!$note) {
            unset($collection[$index]);
            $count--;

            $this->entityManager->removeEntity($entity);

            return;
        }

        $this->noteAccessControl->apply($note, $user);
        $this->loadNoteFields($note, $entity);

        $entity->set('noteData', $note->getValueMap());
    }

    public function getNotReadCount(string $userId): int
    {
        $whereClause = [
            'userId' => $userId,
            'read' => false,
        ];

        $ignoreScopeList = $this->getIgnoreScopeList();

        if (count($ignoreScopeList)) {
            $whereClause[] = [
                'OR' => [
                    'relatedParentType' => null,
                    'relatedParentType!=' => $ignoreScopeList,
                ]
            ];
        }

        return $this->entityManager
            ->getRDBRepositoryByClass(Notification::class)
            ->where($whereClause)
            ->count();
    }

    public function markAllRead(string $userId): bool
    {
        $update = $this->entityManager
            ->getQueryBuilder()
            ->update()
            ->in(Notification::ENTITY_TYPE)
            ->set(['read' => true])
            ->where([
                'userId' => $userId,
                'read' => false,
            ])
            ->build();

        $this->entityManager->getQueryExecutor()->execute($update);

        return true;
    }

    /**
     * @return string[]
     */
    private function getIgnoreScopeList(): array
    {
        $ignoreScopeList = [];

        $scopes = $this->metadata->get('scopes', []);

        foreach ($scopes as $scope => $item) {
            if (empty($item['entity'])) {
                continue;
            }

            if (empty($item['object'])) {
                continue;
            }

            if (!$this->acl->checkScope($scope)) {
                $ignoreScopeList[] = $scope;
            }
        }

        return $ignoreScopeList;
    }

    private function getNoteId(Notification $entity): ?string
    {
        $noteId = null;

        $data = $entity->getData();

        if ($data) {
            $noteId = $data->noteId ?? null;
        }

        if ($entity->getRelated()?->getEntityType() === Note::ENTITY_TYPE) {
            $noteId = $entity->getRelated()->getId();
        }

        return $noteId;
    }

    private function loadNoteFields(Note $note, Notification $notification): void
    {
        $parentId = $note->getParentId();
        $parentType = $note->getParentType();

        if ($parentId && $parentType) {
            if ($notification->getType() !== Notification::TYPE_USER_REACTION) {
                $parent = $this->entityManager->getEntityById($parentType, $parentId);

                if ($parent) {
                    $note->set('parentName', $parent->get(Field::NAME));
                }
            }
        } else if (!$note->isGlobal()) {
            $targetType = $note->getTargetType();

            if (!$targetType || $targetType === Note::TARGET_USERS) {
                $note->loadLinkMultipleField('users');
            }

            if ($targetType !== Note::TARGET_USERS) {
                if (!$targetType || $targetType === Note::TARGET_TEAMS) {
                    $note->loadLinkMultipleField(Field::TEAMS);
                } else if ($targetType === Note::TARGET_PORTALS) {
                    $note->loadLinkMultipleField('portals');
                }
            }
        }

        $relatedId = $note->getRelatedId();
        $relatedType = $note->getRelatedType();

        if ($relatedId && $relatedType && $notification->getType() !== Notification::TYPE_USER_REACTION) {
            $related = $this->entityManager->getEntityById($relatedType, $relatedId);

            if ($related) {
                $note->set('relatedName', $related->get(Field::NAME));
            }
        }

        if ($notification->getType() !== Notification::TYPE_USER_REACTION) {
            $note->loadLinkMultipleField('attachments');
        }
    }
}
