<?php

namespace Drupal\imagick\Plugin\ImageEffect;

use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Image\ImageInterface;
use Drupal\image\ConfigurableImageEffectBase;
use imagick;

/**
 * Adds noise to an image resource.
 *
 * @ImageEffect(
 *   id = "image_noise",
 *   label = @Translation("Noise"),
 *   description = @Translation("Adds noise to the image.")
 * )
 */
class NoiseImageEffect extends ConfigurableImageEffectBase {

  /**
   * {@inheritdoc}
   */
  public function applyEffect(ImageInterface $image) {
    if (!$image->apply('noise', $this->configuration)) {
      $this->logger->error('Image noise failed using the %toolkit toolkit on %path (%mimetype)', [
        '%toolkit' => $image->getToolkitId(),
        '%path' => $image->getSource(),
        '%mimetype' => $image->getMimeType()
      ]);
      return FALSE;
    }
    return TRUE;
  }

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration() {
    return [
      'type' => imagick::NOISE_UNIFORM,
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
    $form['type'] = [
      '#type' => 'select',
      '#title' => $this->t('Noise type'),
      '#options' => [
        imagick::NOISE_UNIFORM => $this->t('Uniform'),
        imagick::NOISE_GAUSSIAN => $this->t('Gaussian'),
        imagick::NOISE_MULTIPLICATIVEGAUSSIAN => $this->t('Multiplicative gaussian'),
        imagick::NOISE_IMPULSE => $this->t('Impulse'),
        imagick::NOISE_LAPLACIAN => $this->t('Laplacian'),
        imagick::NOISE_POISSON => $this->t('Poisson'),
        imagick::NOISE_RANDOM => $this->t('Random'),
      ],
      '#default_value' => $this->configuration['type'],
    ];

    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
    parent::submitConfigurationForm($form, $form_state);

    $this->configuration['type'] = $form_state->getValue('type');
  }

}
