<?php

declare (strict_types=1);
namespace PoPCMSSchema\Users\FieldResolvers\InterfaceType;

use PoP\ComponentModel\TypeResolvers\InterfaceType\InterfaceTypeResolverInterface;
use PoP\ComponentModel\FieldResolvers\InterfaceType\AbstractInterfaceTypeFieldResolver;
use PoP\ComponentModel\TypeResolvers\ConcreteTypeResolverInterface;
use PoPCMSSchema\Users\TypeResolvers\InterfaceType\WithAuthorInterfaceTypeResolver;
use PoPCMSSchema\Users\TypeResolvers\ObjectType\UserObjectTypeResolver;
/** @internal */
class WithAuthorInterfaceTypeFieldResolver extends AbstractInterfaceTypeFieldResolver
{
    private ?UserObjectTypeResolver $userObjectTypeResolver = null;
    protected final function getUserObjectTypeResolver() : UserObjectTypeResolver
    {
        if ($this->userObjectTypeResolver === null) {
            /** @var UserObjectTypeResolver */
            $userObjectTypeResolver = $this->instanceManager->getInstance(UserObjectTypeResolver::class);
            $this->userObjectTypeResolver = $userObjectTypeResolver;
        }
        return $this->userObjectTypeResolver;
    }
    /**
     * @return array<class-string<InterfaceTypeResolverInterface>>
     */
    public function getInterfaceTypeResolverClassesToAttachTo() : array
    {
        return [WithAuthorInterfaceTypeResolver::class];
    }
    /**
     * @return string[]
     */
    public function getFieldNamesToImplement() : array
    {
        return ['author'];
    }
    /**
     * Allow the custom post author to be null!
     * Eg: when using AI to create posts, it may not assign an author,
     * and it'll keep ID 0 in the DB
     */
    // public function getFieldTypeModifiers(string $fieldName): int
    // {
    //     switch ($fieldName) {
    //         case 'author':
    //             return SchemaTypeModifiers::NON_NULLABLE;
    //     }
    //     return parent::getFieldTypeModifiers($fieldName);
    // }
    public function getFieldDescription(string $fieldName) : ?string
    {
        return match ($fieldName) {
            'author' => $this->__('The entity\'s author', 'queriedobject'),
            default => parent::getFieldDescription($fieldName),
        };
    }
    public function getFieldTypeResolver(string $fieldName) : ConcreteTypeResolverInterface
    {
        switch ($fieldName) {
            case 'author':
                return $this->getUserObjectTypeResolver();
        }
        return parent::getFieldTypeResolver($fieldName);
    }
}
