<?php
/**
 * @link https://craftcms.com/
 * @copyright Copyright (c) Pixel & Tonic, Inc.
 * @license https://craftcms.github.io/license/
 */

namespace craft\fields;

use Craft;
use craft\elements\db\EntryQuery;
use craft\elements\Entry;
use craft\gql\arguments\elements\Entry as EntryArguments;
use craft\gql\interfaces\elements\Entry as EntryInterface;
use craft\gql\resolvers\elements\Entry as EntryResolver;
use craft\helpers\Gql;
use craft\helpers\Gql as GqlHelper;
use craft\models\GqlSchema;
use craft\services\Gql as GqlService;
use GraphQL\Type\Definition\Type;

/**
 * Entries represents an Entries field.
 *
 * @author Pixel & Tonic, Inc. <support@pixelandtonic.com>
 * @since 3.0.0
 */
class Entries extends BaseRelationField
{
    /**
     * @inheritdoc
     */
    public static function displayName(): string
    {
        return Craft::t('app', 'Entries');
    }

    /**
     * @inheritdoc
     */
    protected static function elementType(): string
    {
        return Entry::class;
    }

    /**
     * @inheritdoc
     */
    public static function defaultSelectionLabel(): string
    {
        return Craft::t('app', 'Add an entry');
    }

    /**
     * @inheritdoc
     */
    public static function valueType(): string
    {
        return EntryQuery::class;
    }

    /**
     * @inheritdoc
     */
    public function includeInGqlSchema(GqlSchema $schema): bool
    {
        return Gql::canQueryEntries($schema);
    }

    /**
     * @inheritdoc
     * @since 3.3.0
     */
    public function getContentGqlType()
    {
        return [
            'name' => $this->handle,
            'type' => Type::listOf(EntryInterface::getType()),
            'args' => EntryArguments::getArguments(),
            'resolve' => EntryResolver::class . '::resolve',
            'complexity' => GqlHelper::relatedArgumentComplexity(GqlService::GRAPHQL_COMPLEXITY_EAGER_LOAD),
        ];
    }

    /**
     * @inheritdoc
     * @since 3.3.0
     */
    public function getEagerLoadingGqlConditions()
    {
        $allowedEntities = Gql::extractAllowedEntitiesFromSchema();
        $sectionUids = $allowedEntities['sections'] ?? [];
        $entryTypeUids = $allowedEntities['entrytypes'] ?? [];

        if (empty($sectionUids) || empty($entryTypeUids)) {
            return false;
        }

        $sectionsService = Craft::$app->getSections();
        $sectionIds = array_filter(array_map(function(string $uid) use ($sectionsService) {
            $section = $sectionsService->getSectionByUid($uid);
            return $section->id ?? null;
        }, $sectionUids));
        $entryTypeIds = array_filter(array_map(function(string $uid) use ($sectionsService) {
            $entryType = $sectionsService->getEntryTypeByUid($uid);
            return $entryType->id ?? null;
        }, $entryTypeUids));

        return [
            'sectionId' => $sectionIds,
            'typeId' => $entryTypeIds,
        ];
    }
}
