<?php

namespace Drupal\Tests\image\Functional;

use Drupal\Core\Field\FieldStorageDefinitionInterface;
use Drupal\Tests\TestFileCreationTrait;

/**
 * Tests validation functions such as min/max resolution.
 *
 * @group image
 */
class ImageFieldValidateTest extends ImageFieldTestBase {

  use TestFileCreationTrait {
    getTestFiles as drupalGetTestFiles;
    compareFiles as drupalCompareFiles;
  }

  /**
   * Test image validity.
   */
  public function testValid() {
    $file_system = $this->container->get('file_system');
    $image_files = $this->drupalGetTestFiles('image');

    $field_name = strtolower($this->randomMachineName());
    $this->createImageField($field_name, 'article', [], ['file_directory' => 'test-upload']);
    $expected_path = 'public://test-upload';

    // Create alt text for the image.
    $alt = $this->randomMachineName();

    // Create a node with a valid image.
    $node = $this->uploadNodeImage($image_files[0], $field_name, 'article', $alt);
    $this->assertTrue(file_exists($expected_path . '/' . $image_files[0]->filename));

    // Remove the image.
    $this->drupalPostForm('node/' . $node . '/edit', [], t('Remove'));
    $this->drupalPostForm(NULL, [], t('Save'));

    // Get invalid image test files from simpletest.
    $files = file_scan_directory(drupal_get_path('module', 'simpletest') . '/files', '/invalid-img-.*/');
    $invalid_image_files = [];
    foreach ($files as $file) {
      $invalid_image_files[$file->filename] = $file;
    }

    // Try uploading a zero-byte image.
    $zero_size_image = $invalid_image_files['invalid-img-zero-size.png'];
    $edit = [
      'files[' . $field_name . '_0]' => $file_system->realpath($zero_size_image->uri),
    ];
    $this->drupalPostForm('node/' . $node . '/edit', $edit, t('Upload'));
    $this->assertFalse(file_exists($expected_path . '/' . $zero_size_image->filename));

    // Try uploading an invalid image.
    $invalid_image = $invalid_image_files['invalid-img-test.png'];
    $edit = [
      'files[' . $field_name . '_0]' => $file_system->realpath($invalid_image->uri),
    ];
    $this->drupalPostForm('node/' . $node . '/edit', $edit, t('Upload'));
    $this->assertFalse(file_exists($expected_path . '/' . $invalid_image->filename));

    // Upload a valid image again.
    $valid_image = $image_files[0];
    $edit = [
      'files[' . $field_name . '_0]' => $file_system->realpath($valid_image->uri),
    ];
    $this->drupalPostForm('node/' . $node . '/edit', $edit, t('Upload'));
    $this->assertTrue(file_exists($expected_path . '/' . $valid_image->filename));
  }

  /**
   * Test min/max resolution settings.
   */
  public function testResolution() {
    $field_names = [
      0 => strtolower($this->randomMachineName()),
      1 => strtolower($this->randomMachineName()),
      2 => strtolower($this->randomMachineName()),
    ];
    $min_resolution = [
      'width' => 50,
      'height' => 50,
    ];
    $max_resolution = [
      'width' => 100,
      'height' => 100,
    ];
    $no_height_min_resolution = [
      'width' => 50,
      'height' => NULL,
    ];
    $no_height_max_resolution = [
      'width' => 100,
      'height' => NULL,
    ];
    $no_width_min_resolution = [
      'width' => NULL,
      'height' => 50,
    ];
    $no_width_max_resolution = [
      'width' => NULL,
      'height' => 100,
    ];
    $field_settings = [
      0 => $this->getFieldSettings($min_resolution, $max_resolution),
      1 => $this->getFieldSettings($no_height_min_resolution, $no_height_max_resolution),
      2 => $this->getFieldSettings($no_width_min_resolution, $no_width_max_resolution),
    ];
    $this->createImageField($field_names[0], 'article', [], $field_settings[0]);
    $this->createImageField($field_names[1], 'article', [], $field_settings[1]);
    $this->createImageField($field_names[2], 'article', [], $field_settings[2]);

    // We want a test image that is too small, and a test image that is too
    // big, so cycle through test image files until we have what we need.
    $image_that_is_too_big = FALSE;
    $image_that_is_too_small = FALSE;
    $image_factory = $this->container->get('image.factory');
    foreach ($this->drupalGetTestFiles('image') as $image) {
      $image_file = $image_factory->get($image->uri);
      if ($image_file->getWidth() > $max_resolution['width']) {
        $image_that_is_too_big = $image;
      }
      if ($image_file->getWidth() < $min_resolution['width']) {
        $image_that_is_too_small = $image;
        $image_that_is_too_small_file = $image_file;
      }
      if ($image_that_is_too_small && $image_that_is_too_big) {
        break;
      }
    }
    $this->uploadNodeImage($image_that_is_too_small, $field_names[0], 'article');
    $this->assertRaw(t('The specified file %name could not be uploaded.', ['%name' => $image_that_is_too_small->filename]));
    $this->assertRaw(t('The image is too small. The minimum dimensions are %dimensions pixels and the image size is %widthx%height pixels.', [
      '%dimensions' => '50x50',
      '%width' => $image_that_is_too_small_file->getWidth(),
      '%height' => $image_that_is_too_small_file->getHeight(),
      ]));
    $this->uploadNodeImage($image_that_is_too_big, $field_names[0], 'article');
    $this->assertText(t('The image was resized to fit within the maximum allowed dimensions of 100x100 pixels.'));
    $this->uploadNodeImage($image_that_is_too_small, $field_names[1], 'article');
    $this->assertRaw(t('The specified file %name could not be uploaded.', ['%name' => $image_that_is_too_small->filename]));
    $this->uploadNodeImage($image_that_is_too_big, $field_names[1], 'article');
    $this->assertText(t('The image was resized to fit within the maximum allowed width of 100 pixels.'));
    $this->uploadNodeImage($image_that_is_too_small, $field_names[2], 'article');
    $this->assertRaw(t('The specified file %name could not be uploaded.', ['%name' => $image_that_is_too_small->filename]));
    $this->uploadNodeImage($image_that_is_too_big, $field_names[2], 'article');
    $this->assertText(t('The image was resized to fit within the maximum allowed height of 100 pixels.'));
  }

  /**
   * Test that required alt/title fields gets validated right.
   */
  public function testRequiredAttributes() {
    $field_name = strtolower($this->randomMachineName());
    $field_settings = [
      'alt_field' => 1,
      'alt_field_required' => 1,
      'title_field' => 1,
      'title_field_required' => 1,
      'required' => 1,
    ];
    $instance = $this->createImageField($field_name, 'article', [], $field_settings);
    $images = $this->drupalGetTestFiles('image');
    // Let's just use the first image.
    $image = $images[0];
    $this->uploadNodeImage($image, $field_name, 'article');

    // Look for form-required for the alt text.
    $elements = $this->xpath('//label[@for="edit-' . $field_name . '-0-alt" and @class="js-form-required form-required"]/following-sibling::input[@id="edit-' . $field_name . '-0-alt"]');

    $this->assertTrue(isset($elements[0]), 'Required marker is shown for the required alt text.');

    $elements = $this->xpath('//label[@for="edit-' . $field_name . '-0-title" and @class="js-form-required form-required"]/following-sibling::input[@id="edit-' . $field_name . '-0-title"]');

    $this->assertTrue(isset($elements[0]), 'Required marker is shown for the required title text.');

    $this->assertText(t('Alternative text field is required.'));
    $this->assertText(t('Title field is required.'));

    $instance->setSetting('alt_field_required', 0);
    $instance->setSetting('title_field_required', 0);
    $instance->save();

    $edit = [
      'title[0][value]' => $this->randomMachineName(),
    ];
    $this->drupalPostForm('node/add/article', $edit, t('Save'));

    $this->assertNoText(t('Alternative text field is required.'));
    $this->assertNoText(t('Title field is required.'));

    $instance->setSetting('required', 0);
    $instance->setSetting('alt_field_required', 1);
    $instance->setSetting('title_field_required', 1);
    $instance->save();

    $edit = [
      'title[0][value]' => $this->randomMachineName(),
    ];
    $this->drupalPostForm('node/add/article', $edit, t('Save'));

    $this->assertNoText(t('Alternative text field is required.'));
    $this->assertNoText(t('Title field is required.'));
  }

  /**
   * Tests creating an entity while leaving the image field empty.
   *
   * This is tested first with edit access to the image field allowed, and then
   * with it forbidden.
   *
   * @dataProvider providerTestEmpty
   */
  public function testEmpty($field_name, $required, $cardinality, $form_element_name, $expected_page_text_when_edit_access_allowed, $expected_page_text_when_edit_access_forbidden) {
    $this->createImageField($field_name, 'article', ['cardinality' => $cardinality], ['required' => $required]);

    // Test with field edit access allowed.
    $this->drupalGet('node/add/article');
    $this->assertSession()->fieldExists($form_element_name);
    $edit = [
      'title[0][value]' => 'Article with edit-access-allowed image field',
    ];
    $this->drupalPostForm(NULL, $edit, t('Save'));
    $this->assertSession()->pageTextContains($expected_page_text_when_edit_access_allowed);

    // Test with field edit access forbidden.
    \Drupal::service('module_installer')->install(['image_access_test_hidden']);
    $this->drupalGet('node/add/article');
    $this->assertSession()->fieldNotExists($form_element_name);
    $edit = [
      'title[0][value]' => 'Article with edit-access-forbidden image field',
    ];
    $this->drupalPostForm(NULL, $edit, t('Save'));
    $this->assertSession()->pageTextContains($expected_page_text_when_edit_access_forbidden);
  }

  /**
   * Data provider for ::testEmpty()
   *
   * @return array
   *   Test cases.
   */
  public function providerTestEmpty() {
    return [
      'optional-single' => ['field_image', FALSE, 1, 'files[field_image_0]', 'Article Article with edit-access-allowed image field has been created.', 'Article Article with edit-access-forbidden image field has been created.'],
      'optional-unlimited' => ['field_image', FALSE, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED, 'files[field_image_0][]', 'Article Article with edit-access-allowed image field has been created.', 'Article Article with edit-access-forbidden image field has been created.'],
      'optional-multiple-limited' => ['field_image', FALSE, 2, 'files[field_image_0][]', 'Article Article with edit-access-allowed image field has been created.', 'Article Article with edit-access-forbidden image field has been created.'],
      'required-single' => ['field_image', TRUE, 1, 'files[field_image_0]', 'field_image field is required.', 'field_image field is required.'],
      'required-unlimited' => ['field_image', TRUE, FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED, 'files[field_image_0][]', 'field_image field is required.', 'field_image field is required.'],

      // @todo Fix this discrepancy in https://www.drupal.org/project/drupal/issues/3011744.
      'required-multiple-limited' => ['field_image', TRUE, 2, 'files[field_image_0][]', 'This value should not be null.', 'Article Article with edit-access-forbidden image field has been created.'],
    ];
  }

  /**
   * Returns field settings.
   *
   * @param int[] $min_resolution
   *   The minimum width and height resolution setting.
   * @param int[] $max_resolution
   *   The maximum width and height resolution setting.
   *
   * @return array
   */
  protected function getFieldSettings($min_resolution, $max_resolution) {
    return [
      'max_resolution' => $max_resolution['width'] . 'x' . $max_resolution['height'],
      'min_resolution' => $min_resolution['width'] . 'x' . $min_resolution['height'],
      'alt_field' => 0,
    ];
  }

}
