<?php

declare(strict_types=1);

namespace Drupal\Tests\language\Functional;

use Drupal\Core\Url;
use Drupal\Core\Language\Language;
use Drupal\Core\Language\LanguageInterface;
use Drupal\Tests\BrowserTestBase;

/**
 * Adds and configures custom languages.
 *
 * @group language
 */
class LanguageCustomLanguageConfigurationTest extends BrowserTestBase {

  /**
   * {@inheritdoc}
   */
  protected static $modules = ['language'];

  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';

  /**
   * Functional tests for adding, editing and deleting languages.
   */
  public function testLanguageConfiguration(): void {

    // Create user with permissions to add and remove languages.
    $admin_user = $this->drupalCreateUser([
      'administer languages',
      'access administration pages',
    ]);
    $this->drupalLogin($admin_user);

    // Add custom language.
    $edit = [
      'predefined_langcode' => 'custom',
    ];
    $this->drupalGet('admin/config/regional/language/add');
    $this->submitForm($edit, 'Add custom language');
    // Test validation on missing values.
    $this->assertSession()->statusMessageContains('Language code field is required.', 'error');
    $this->assertSession()->statusMessageContains('Language name field is required.', 'error');
    $empty_language = new Language();
    $this->assertSession()->checkboxChecked('edit-direction-' . $empty_language->getDirection());
    $this->assertSession()->addressEquals(Url::fromRoute('language.add'));

    // Test validation of invalid values.
    $edit = [
      'predefined_langcode' => 'custom',
      'langcode' => 'white space',
      'label' => '<strong>evil markup</strong>',
      'direction' => LanguageInterface::DIRECTION_LTR,
    ];
    $this->drupalGet('admin/config/regional/language/add');
    $this->submitForm($edit, 'Add custom language');

    $this->assertSession()->statusMessageContains('Language code must be a valid language tag as defined by the W3C.', 'error');
    $this->assertSession()->linkExists("defined by the W3C");
    $this->assertSession()->linkByHrefExists("https://www.w3.org/International/articles/language-tags/");
    $this->assertSession()->statusMessageContains('Language name cannot contain any markup.', 'error');
    $this->assertSession()->addressEquals(Url::fromRoute('language.add'));

    // Test adding a custom language with a numeric region code.
    $edit = [
      'predefined_langcode' => 'custom',
      'langcode' => 'es-419',
      'label' => 'Latin American Spanish',
      'direction' => LanguageInterface::DIRECTION_LTR,
    ];

    $this->drupalGet('admin/config/regional/language/add');
    $this->submitForm($edit, 'Add custom language');
    $this->assertSession()->statusMessageContains("The language {$edit['label']} has been created and can now be used.", 'status');
    $this->assertSession()->addressEquals(Url::fromRoute('entity.configurable_language.collection'));

    // Test validation of existing language values.
    $edit = [
      'predefined_langcode' => 'custom',
      'langcode' => 'de',
      'label' => 'German',
      'direction' => LanguageInterface::DIRECTION_LTR,
    ];

    // Add the language the first time.
    $this->drupalGet('admin/config/regional/language/add');
    $this->submitForm($edit, 'Add custom language');
    $this->assertSession()->statusMessageContains("The language {$edit['label']} has been created and can now be used.", 'status');
    $this->assertSession()->addressEquals(Url::fromRoute('entity.configurable_language.collection'));

    // Add the language a second time and confirm that this is not allowed.
    $this->drupalGet('admin/config/regional/language/add');
    $this->submitForm($edit, 'Add custom language');
    $this->assertSession()->statusMessageContains("The language {$edit['label']} ({$edit['langcode']}) already exists.", 'error');
    $this->assertSession()->addressEquals(Url::fromRoute('language.add'));
  }

}
