<?php

declare(strict_types=1);

namespace Drupal\Tests\field_ui\Kernel;

use Drupal\Core\Entity\Entity\EntityFormDisplay;
use Drupal\Core\Entity\Entity\EntityFormMode;
use Drupal\field\Entity\FieldConfig;
use Drupal\field\Entity\FieldStorageConfig;
use Drupal\KernelTests\KernelTestBase;

/**
 * Tests the entity display configuration entities.
 *
 * @group field_ui
 */
class EntityFormDisplayTest extends KernelTestBase {

  /**
   * Modules to install.
   *
   * @var string[]
   */
  protected static $modules = [
    'field_ui',
    'field',
    'entity_test',
    'field_test',
    'system',
    'text',
    'user',
  ];

  /**
   * {@inheritdoc}
   */
  protected function setUp(): void {
    parent::setUp();
    $this->installEntitySchema('action');
    $this->installConfig('user');
    $this->installEntitySchema('entity_test');
  }

  /**
   * @covers \Drupal\Core\Entity\EntityDisplayRepository::getFormDisplay
   */
  public function testEntityGetFromDisplay(): void {
    /** @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository */
    $display_repository = \Drupal::service('entity_display.repository');

    // Check that EntityDisplayRepositoryInterface::getFormDisplay() returns a
    // fresh object when no configuration entry exists.
    $form_display = $display_repository->getFormDisplay('entity_test', 'entity_test');
    $this->assertTrue($form_display->isNew());

    // Add some components and save the display.
    $form_display->setComponent('component_1', ['weight' => 10])
      ->save();

    // Check that EntityDisplayRepositoryInterface::getFormDisplay() returns the
    // correct object.
    $form_display = $display_repository->getFormDisplay('entity_test', 'entity_test');
    $this->assertFalse($form_display->isNew());
    $this->assertEquals('entity_test.entity_test.default', $form_display->id());
    $this->assertEquals(['weight' => 10, 'settings' => [], 'third_party_settings' => [], 'region' => 'content'], $form_display->getComponent('component_1'));
  }

  /**
   * Tests the behavior of a field component within an EntityFormDisplay object.
   */
  public function testFieldComponent(): void {
    // Create a field storage and a field.
    $field_name = 'test_field';
    $field_storage = FieldStorageConfig::create([
      'field_name' => $field_name,
      'entity_type' => 'entity_test',
      'type' => 'test_field',
    ]);
    $field_storage->save();
    $field = FieldConfig::create([
      'field_storage' => $field_storage,
      'bundle' => 'entity_test',
    ]);
    $field->save();

    $form_display = EntityFormDisplay::create([
      'targetEntityType' => 'entity_test',
      'bundle' => 'entity_test',
      'mode' => 'default',
    ]);

    // Check that providing no options results in default values being used.
    $form_display->setComponent($field_name);
    $field_type_info = \Drupal::service('plugin.manager.field.field_type')->getDefinition($field_storage->getType());
    $default_widget = $field_type_info['default_widget'];
    $widget_settings = \Drupal::service('plugin.manager.field.widget')->getDefaultSettings($default_widget);
    $expected = [
      'weight' => 3,
      'type' => $default_widget,
      'settings' => $widget_settings,
      'third_party_settings' => [],
    ];
    $this->assertEquals($expected, $form_display->getComponent($field_name));

    // Check that the getWidget() method returns the correct widget plugin.
    $widget = $form_display->getRenderer($field_name);
    $this->assertEquals($default_widget, $widget->getPluginId());
    $this->assertEquals($widget_settings, $widget->getSettings());

    // Check that the widget is statically persisted.
    $this->assertSame($widget, $form_display->getRenderer($field_name));

    // Check that changing the definition creates a new widget.
    $form_display->setComponent($field_name, [
      'type' => 'field_test_multiple',
    ]);
    $renderer = $form_display->getRenderer($field_name);
    $this->assertEquals('test_field_widget', $renderer->getPluginId());
    $this->assertNotSame($widget, $renderer);

    // Check that specifying an unknown widget (e.g. case of a disabled module)
    // gets stored as is in the display, but results in the default widget being
    // used.
    $form_display->setComponent($field_name, [
      'type' => 'unknown_widget',
    ]);
    $options = $form_display->getComponent($field_name);
    $this->assertEquals('unknown_widget', $options['type']);
    $widget = $form_display->getRenderer($field_name);
    $this->assertEquals($default_widget, $widget->getPluginId());
  }

  /**
   * Tests the behavior of a field component for a base field.
   */
  public function testBaseFieldComponent(): void {
    $display = EntityFormDisplay::create([
      'targetEntityType' => 'entity_test_base_field_display',
      'bundle' => 'entity_test_base_field_display',
      'mode' => 'default',
    ]);

    // Check that default options are correctly filled in.
    $formatter_settings = \Drupal::service('plugin.manager.field.widget')->getDefaultSettings('text_textfield');
    $expected = [
      'test_no_display' => NULL,
      'test_display_configurable' => [
        'type' => 'text_textfield',
        'settings' => $formatter_settings,
        'third_party_settings' => [],
        'weight' => 10,
        'region' => 'content',
      ],
      'test_display_non_configurable' => [
        'type' => 'text_textfield',
        'settings' => $formatter_settings,
        'third_party_settings' => [],
        'weight' => 11,
        'region' => 'content',
      ],
    ];
    foreach ($expected as $field_name => $options) {
      $this->assertEquals($options, $display->getComponent($field_name));
    }

    // Check that saving the display only writes data for fields whose display
    // is configurable.
    $display->save();
    $config = $this->config('core.entity_form_display.' . $display->id());
    $data = $config->get();
    $this->assertFalse(isset($data['content']['test_no_display']));
    $this->assertFalse(isset($data['hidden']['test_no_display']));
    $this->assertEquals($expected['test_display_configurable'], $data['content']['test_display_configurable']);
    $this->assertFalse(isset($data['content']['test_display_non_configurable']));
    $this->assertFalse(isset($data['hidden']['test_display_non_configurable']));

    // Check that defaults are correctly filled when loading the display.
    $display = EntityFormDisplay::load($display->id());
    foreach ($expected as $field_name => $options) {
      $this->assertEquals($options, $display->getComponent($field_name));
    }

    // Check that data manually written for fields whose display is not
    // configurable is discarded when loading the display.
    $data['content']['test_display_non_configurable'] = $expected['test_display_non_configurable'];
    $data['content']['test_display_non_configurable']['weight']++;
    $config->setData($data)->save();
    $display = EntityFormDisplay::load($display->id());
    foreach ($expected as $field_name => $options) {
      $this->assertEquals($options, $display->getComponent($field_name));
    }
  }

  /**
   * Tests deleting field.
   */
  public function testDeleteField(): void {
    $field_name = 'test_field';
    // Create a field storage and a field.
    $field_storage = FieldStorageConfig::create([
      'field_name' => $field_name,
      'entity_type' => 'entity_test',
      'type' => 'test_field',
    ]);
    $field_storage->save();
    $field = FieldConfig::create([
      'field_storage' => $field_storage,
      'bundle' => 'entity_test',
    ]);
    $field->save();

    // Create default and compact entity display.
    EntityFormMode::create([
      'id' => 'entity_test.compact',
      'label' => 'Compact',
      'targetEntityType' => 'entity_test',
    ])->save();
    EntityFormDisplay::create([
      'targetEntityType' => 'entity_test',
      'bundle' => 'entity_test',
      'mode' => 'default',
    ])->setComponent($field_name)->save();
    EntityFormDisplay::create([
      'targetEntityType' => 'entity_test',
      'bundle' => 'entity_test',
      'mode' => 'compact',
    ])->setComponent($field_name)->save();

    /** @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository */
    $display_repository = \Drupal::service('entity_display.repository');

    // Check the component exists.
    $display = $display_repository->getFormDisplay('entity_test', 'entity_test');
    $this->assertNotEmpty($display->getComponent($field_name));
    $display = $display_repository->getFormDisplay('entity_test', 'entity_test', 'compact');
    $this->assertNotEmpty($display->getComponent($field_name));

    // Delete the field.
    $field->delete();

    // Check that the component has been removed from the entity displays.
    $display = $display_repository->getFormDisplay('entity_test', 'entity_test');
    $this->assertNull($display->getComponent($field_name));
    $display = $display_repository->getFormDisplay('entity_test', 'entity_test', 'compact');
    $this->assertNull($display->getComponent($field_name));
  }

  /**
   * Tests \Drupal\Core\Entity\EntityDisplayBase::onDependencyRemoval().
   */
  public function testOnDependencyRemoval(): void {
    $this->enableModules(['field_plugins_test']);

    $field_name = 'test_field';
    // Create a field.
    $field_storage = FieldStorageConfig::create([
      'field_name' => $field_name,
      'entity_type' => 'entity_test',
      'type' => 'text',
    ]);
    $field_storage->save();
    $field = FieldConfig::create([
      'field_storage' => $field_storage,
      'bundle' => 'entity_test',
    ]);
    $field->save();

    EntityFormDisplay::create([
      'targetEntityType' => 'entity_test',
      'bundle' => 'entity_test',
      'mode' => 'default',
    ])->setComponent($field_name, ['type' => 'field_plugins_test_text_widget'])->save();

    /** @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository */
    $display_repository = \Drupal::service('entity_display.repository');

    // Check the component exists and is of the correct type.
    $display = $display_repository->getFormDisplay('entity_test', 'entity_test');
    $this->assertEquals('field_plugins_test_text_widget', $display->getComponent($field_name)['type']);

    // Removing the field_plugins_test module should change the component to use
    // the default widget for test fields.
    \Drupal::service('config.manager')->uninstall('module', 'field_plugins_test');
    $display = $display_repository->getFormDisplay('entity_test', 'entity_test');
    $this->assertEquals('text_textfield', $display->getComponent($field_name)['type']);

    // Removing the text module should remove the field from the form display.
    \Drupal::service('config.manager')->uninstall('module', 'text');
    $display = $display_repository->getFormDisplay('entity_test', 'entity_test');
    $this->assertNull($display->getComponent($field_name));
  }

  /**
   * Tests the serialization and unserialization of the class.
   */
  public function testSerialization(): void {
    /** @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository */
    $display_repository = \Drupal::service('entity_display.repository');

    $form_display = $display_repository->getFormDisplay('entity_test', 'entity_test');
    // Make sure the langcode base field is visible in the original form
    // display.
    $this->assertNotEmpty($form_display->getComponent('langcode'));
    // Remove the langcode.
    $form_display->removeComponent('langcode');

    $unserialized = unserialize(serialize($form_display));
    // Verify that components are retained upon unserialization.
    $this->assertEquals($form_display->getComponents(), $unserialized->getComponents());
  }

}
