<?php

namespace BookStack\Entities\Repos;

use BookStack\Activity\TagRepo;
use BookStack\Entities\Models\Book;
use BookStack\Entities\Models\Chapter;
use BookStack\Entities\Models\Entity;
use BookStack\Entities\Models\HasCoverImage;
use BookStack\Entities\Models\HasHtmlDescription;
use BookStack\Entities\Queries\PageQueries;
use BookStack\Exceptions\ImageUploadException;
use BookStack\References\ReferenceStore;
use BookStack\References\ReferenceUpdater;
use BookStack\Uploads\ImageRepo;
use BookStack\Util\HtmlDescriptionFilter;
use Illuminate\Http\UploadedFile;

class BaseRepo
{
    public function __construct(
        protected TagRepo $tagRepo,
        protected ImageRepo $imageRepo,
        protected ReferenceUpdater $referenceUpdater,
        protected ReferenceStore $referenceStore,
        protected PageQueries $pageQueries,
    ) {
    }

    /**
     * Create a new entity in the system.
     */
    public function create(Entity $entity, array $input)
    {
        $entity->fill($input);
        $this->updateDescription($entity, $input);
        $entity->forceFill([
            'created_by' => user()->id,
            'updated_by' => user()->id,
            'owned_by'   => user()->id,
        ]);
        $entity->refreshSlug();
        $entity->save();

        if (isset($input['tags'])) {
            $this->tagRepo->saveTagsToEntity($entity, $input['tags']);
        }

        $entity->refresh();
        $entity->rebuildPermissions();
        $entity->indexForSearch();
        $this->referenceStore->updateForEntity($entity);
    }

    /**
     * Update the given entity.
     */
    public function update(Entity $entity, array $input)
    {
        $oldUrl = $entity->getUrl();

        $entity->fill($input);
        $this->updateDescription($entity, $input);
        $entity->updated_by = user()->id;

        if ($entity->isDirty('name') || empty($entity->slug)) {
            $entity->refreshSlug();
        }

        $entity->save();

        if (isset($input['tags'])) {
            $this->tagRepo->saveTagsToEntity($entity, $input['tags']);
            $entity->touch();
        }

        $entity->rebuildPermissions();
        $entity->indexForSearch();
        $this->referenceStore->updateForEntity($entity);

        if ($oldUrl !== $entity->getUrl()) {
            $this->referenceUpdater->updateEntityReferences($entity, $oldUrl);
        }
    }

    /**
     * Update the given items' cover image, or clear it.
     *
     * @param Entity&HasCoverImage $entity
     *
     * @throws ImageUploadException
     * @throws \Exception
     */
    public function updateCoverImage($entity, ?UploadedFile $coverImage, bool $removeImage = false)
    {
        if ($coverImage) {
            $imageType = $entity->coverImageTypeKey();
            $this->imageRepo->destroyImage($entity->cover()->first());
            $image = $this->imageRepo->saveNew($coverImage, $imageType, $entity->id, 512, 512, true);
            $entity->cover()->associate($image);
            $entity->save();
        }

        if ($removeImage) {
            $this->imageRepo->destroyImage($entity->cover()->first());
            $entity->image_id = 0;
            $entity->save();
        }
    }

    /**
     * Update the default page template used for this item.
     * Checks that, if changing, the provided value is a valid template and the user
     * has visibility of the provided page template id.
     */
    public function updateDefaultTemplate(Book|Chapter $entity, int $templateId): void
    {
        $changing = $templateId !== intval($entity->default_template_id);
        if (!$changing) {
            return;
        }

        if ($templateId === 0) {
            $entity->default_template_id = null;
            $entity->save();
            return;
        }

        $templateExists = $this->pageQueries->visibleTemplates()
            ->where('id', '=', $templateId)
            ->exists();

        $entity->default_template_id = $templateExists ? $templateId : null;
        $entity->save();
    }

    protected function updateDescription(Entity $entity, array $input): void
    {
        if (!in_array(HasHtmlDescription::class, class_uses($entity))) {
            return;
        }

        /** @var HasHtmlDescription $entity */
        if (isset($input['description_html'])) {
            $entity->description_html = HtmlDescriptionFilter::filterFromString($input['description_html']);
            $entity->description = html_entity_decode(strip_tags($input['description_html']));
        } else if (isset($input['description'])) {
            $entity->description = $input['description'];
            $entity->description_html = '';
            $entity->description_html = $entity->descriptionHtml();
        }
    }
}