{% import '@lib/di.twig' as di %}
<?php declare(strict_types = 1);

namespace Drupal\{{ machine_name }}\Plugin\Validation\Constraint;

{% sort %}
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
  {% if input_type == 'item' %}
use Drupal\Core\Field\FieldItemInterface;
  {% elseif input_type == 'item_list' %}
use Drupal\Core\Field\FieldItemListInterface;
  {% elseif input_type == 'entity' %}
use Drupal\Core\Entity\EntityInterface;
  {% endif %}
  {% if services %}
{{ di.use(services) }}
use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
  {% endif %}
{% endsort %}

/**
 * Validates the {{ plugin_label }} constraint.
 */
final class {{ class }}Validator extends ConstraintValidator {% if services %}implements ContainerInjectionInterface {% endif %}{

{% if services %}
  /**
   * Constructs the object.
   */
  public function __construct(
{{ di.signature(services) }}
  ) {}

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container): self {
    return new self(
{{ di.container(services) }}
    );
  }

{% endif %}
  /**
   * {@inheritdoc}
   */
{% if input_type == 'raw_value' %}
  public function validate(mixed $value, Constraint $constraint): void {
    // @todo Validate the value here.
    if ($value === 'wrong') {
      $this->context->addViolation($constraint->message);
    }
  }
{% elseif input_type == 'item' %}
  public function validate(mixed $item, Constraint $constraint): void {
    if (!$item instanceof FieldItemInterface) {
      throw new \InvalidArgumentException(
        sprintf('The validated value must be instance of \Drupal\Core\Field\FieldItemInterface, %s was given.', get_debug_type($item))
      );
    }
    // @todo Validate the item value here.
    if ($item->value === 'wrong') {
      $this->context->addViolation($constraint->message);
    }
  }
{% elseif input_type == 'item_list' %}
  public function validate(mixed $items, Constraint $constraint): void {
    if (!$items instanceof FieldItemListInterface) {
      throw new \InvalidArgumentException(
        sprintf('The validated value must be instance of \Drupal\Core\Field\FieldItemListInterface, %s was given.', get_debug_type($items))
      );
    }
    foreach ($items as $delta => $item) {
      // @todo Validate the item list here.
      if ($item->value === 'wrong') {
        $this->context->buildViolation($constraint->message)
          ->atPath($delta)
          ->addViolation();
      }
    }
  }
{% elseif input_type == 'entity' %}
  public function validate(mixed $entity, Constraint $constraint): void {
    if (!$entity instanceof EntityInterface) {
      throw new \InvalidArgumentException(
        sprintf('The validated value must be instance of \Drupal\Core\Entity\EntityInterface, %s was given.', get_debug_type($entity))
      );
    }
    // @todo Validate the entity here.
    if ($entity->label() === 'wrong') {
      // @DCG Use the following code to bind the violation to a specific field.
      // @code
      // $this->context->buildViolation($constraint->message)
      //   ->atPath('field_example')
      //   ->addViolation();
      // @endcode
      $this->context->addViolation($constraint->message);
    }
  }
{% endif %}

}
