<?php

namespace Drupal\Tests\book\Functional;

use Drupal\Tests\BrowserTestBase;

/**
 * Create a book, add pages, and test book interface.
 *
 * @group book
 */
class BookBreadcrumbTest extends BrowserTestBase {

  /**
   * Modules to install.
   *
   * @var array
   */
  protected static $modules = ['book', 'block', 'book_breadcrumb_test'];

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

  /**
   * A book node.
   *
   * @var \Drupal\node\NodeInterface
   */
  protected $book;

  /**
   * A user with permission to create and edit books.
   *
   * @var \Drupal\user\Entity\User
   */
  protected $bookAuthor;

  /**
   * A user without the 'node test view' permission.
   *
   * @var \Drupal\user\UserInterface
   */
  protected $webUserWithoutNodeAccess;

  /**
   * {@inheritdoc}
   */
  protected function setUp(): void {
    parent::setUp();
    $this->drupalPlaceBlock('system_breadcrumb_block');
    $this->drupalPlaceBlock('page_title_block');

    // Create users.
    $this->bookAuthor = $this->drupalCreateUser([
      'create new books',
      'create book content',
      'edit own book content',
      'add content to books',
    ]);
  }

  /**
   * Creates a new book with a page hierarchy.
   *
   * @return \Drupal\node\NodeInterface[]
   *   The created book nodes.
   */
  protected function createBreadcrumbBook() {
    // Create new book.
    $this->drupalLogin($this->bookAuthor);

    $this->book = $this->createBookNode('new');
    $book = $this->book;

    /*
     * Add page hierarchy to book.
     * Book
     *  |- Node 0
     *   |- Node 1
     *   |- Node 2
     *    |- Node 3
     *     |- Node 4
     *      |- Node 5
     *  |- Node 6
     */
    $nodes = [];
    $nodes[0] = $this->createBookNode($book->id());
    $nodes[1] = $this->createBookNode($book->id(), $nodes[0]->id());
    $nodes[2] = $this->createBookNode($book->id(), $nodes[0]->id());
    $nodes[3] = $this->createBookNode($book->id(), $nodes[2]->id());
    $nodes[4] = $this->createBookNode($book->id(), $nodes[3]->id());
    $nodes[5] = $this->createBookNode($book->id(), $nodes[4]->id());
    $nodes[6] = $this->createBookNode($book->id());

    $this->drupalLogout();

    return $nodes;
  }

  /**
   * Creates a book node.
   *
   * @param int|string $book_nid
   *   A book node ID or set to 'new' to create a new book.
   * @param int|null $parent
   *   (optional) Parent book reference ID. Defaults to NULL.
   *
   * @return \Drupal\node\NodeInterface
   *   The created node.
   */
  protected function createBookNode($book_nid, $parent = NULL) {
    // $number does not use drupal_static as it should not be reset since it
    // uniquely identifies each call to createBookNode(). It is used to ensure
    // that when sorted nodes stay in same order.
    static $number = 0;

    $edit = [];
    $edit['title[0][value]'] = str_pad((string) $number, 2, '0', STR_PAD_LEFT) . ' - test node ' . $this->randomMachineName(10);
    $edit['body[0][value]'] = 'test body ' . $this->randomMachineName(32) . ' ' . $this->randomMachineName(32);
    $edit['book[bid]'] = $book_nid;

    if ($parent !== NULL) {
      $this->drupalGet('node/add/book');
      $this->submitForm($edit, 'Change book (update list of parents)');

      $edit['book[pid]'] = $parent;
      $this->submitForm($edit, 'Save');
      // Make sure the parent was flagged as having children.
      $parent_node = \Drupal::entityTypeManager()->getStorage('node')->loadUnchanged($parent);
      $this->assertNotEmpty($parent_node->book['has_children'], 'Parent node is marked as having children');
    }
    else {
      $this->drupalGet('node/add/book');
      $this->submitForm($edit, 'Save');
    }

    // Check to make sure the book node was created.
    $node = $this->drupalGetNodeByTitle($edit['title[0][value]']);
    $this->assertNotNull(($node === FALSE ? NULL : $node), 'Book node found in database.');
    $number++;

    return $node;
  }

  /**
   * Tests that the breadcrumb is updated when book content changes.
   */
  public function testBreadcrumbTitleUpdates() {
    // Create a new book.
    $nodes = $this->createBreadcrumbBook();
    $book = $this->book;

    $this->drupalLogin($this->bookAuthor);

    $this->drupalGet($nodes[4]->toUrl());
    // Fetch each node title in the current breadcrumb.
    $links = $this->xpath('//nav[@aria-labelledby="system-breadcrumb"]/ol/li/a');
    $got_breadcrumb = [];
    foreach ($links as $link) {
      $got_breadcrumb[] = $link->getText();
    }
    // Home link and four parent book nodes should be in the breadcrumb.
    $this->assertCount(5, $got_breadcrumb);
    $this->assertEquals($nodes[3]->getTitle(), end($got_breadcrumb));
    $edit = [
      'title[0][value]' => 'Updated node5 title',
    ];
    $this->drupalGet($nodes[3]->toUrl('edit-form'));
    $this->submitForm($edit, 'Save');
    $this->drupalGet($nodes[4]->toUrl());
    // Fetch each node title in the current breadcrumb.
    $links = $this->xpath('//nav[@aria-labelledby="system-breadcrumb"]/ol/li/a');
    $got_breadcrumb = [];
    foreach ($links as $link) {
      $got_breadcrumb[] = $link->getText();
    }
    $this->assertCount(5, $got_breadcrumb);
    $this->assertEquals($edit['title[0][value]'], end($got_breadcrumb));
  }

  /**
   * Tests that the breadcrumb is updated when book access changes.
   */
  public function testBreadcrumbAccessUpdates() {
    // Create a new book.
    $nodes = $this->createBreadcrumbBook();
    $this->drupalLogin($this->bookAuthor);
    $edit = [
      'title[0][value]' => "you can't see me",
    ];
    $this->drupalGet($nodes[3]->toUrl('edit-form'));
    $this->submitForm($edit, 'Save');
    $this->drupalGet($nodes[4]->toUrl());
    $links = $this->xpath('//nav[@aria-labelledby="system-breadcrumb"]/ol/li/a');
    $got_breadcrumb = [];
    foreach ($links as $link) {
      $got_breadcrumb[] = $link->getText();
    }
    $this->assertCount(5, $got_breadcrumb);
    $this->assertEquals($edit['title[0][value]'], end($got_breadcrumb));
    $config = $this->container->get('config.factory')->getEditable('book_breadcrumb_test.settings');
    $config->set('hide', TRUE)->save();
    $this->drupalGet($nodes[4]->toUrl());
    $links = $this->xpath('//nav[@aria-labelledby="system-breadcrumb"]/ol/li/a');
    $got_breadcrumb = [];
    foreach ($links as $link) {
      $got_breadcrumb[] = $link->getText();
    }
    $this->assertCount(4, $got_breadcrumb);
    $this->assertEquals($nodes[2]->getTitle(), end($got_breadcrumb));
    $this->drupalGet($nodes[3]->toUrl());
    $this->assertSession()->statusCodeEquals(403);
  }

}
