<?php

/**
 * @file
 * Install, update and uninstall functions for the Structural Pages module.
 */

declare(strict_types=1);

use Drupal\taxonomy\Entity\Term;

/**
 * Implements hook_install().
 */
function structural_pages_install(): void {
  // Create default terms for the configured vocabulary.
  _structural_pages_create_default_terms();

  // Display success message.
  \Drupal::messenger()->addStatus(t('Structural Pages module installed successfully. Configure Pathauto patterns at /admin/config/search/path/patterns'));
}

/**
 * Creates default terms for the configured site section vocabulary.
 */
function _structural_pages_create_default_terms(): void {
  $vocabulary = _structural_pages_get_vocabulary();

  // Check if terms already exist (avoid duplication on reinstall).
  $existing = \Drupal::entityQuery('taxonomy_term')
    ->accessCheck(FALSE)
    ->condition('vid', $vocabulary)
    ->count()
    ->execute();

  if ($existing > 0) {
    return;
  }

  // Structure: name => children.
  $terms_structure = [
    'Notícias' => [],
    'Eventos' => [],
    'Pessoas' => [],
    'Institucional' => [
      'Sobre',
      'Comunicação',
      'Informações e Serviços',
      'Equipe',
      'Gestão',
      'Inclusão e Pertencimento',
    ],
    'Graduação' => [
      'Estatística',
      'Matemática',
      'Matemática Aplicada',
      'Licenciatura em Matemática',
    ],
    'Pós-Graduação' => [
      'Programa de Estatística',
      'Programa de Matemática',
      'Programa de Matemática Aplicada',
    ],
    'Pesquisa' => [],
    'Extensão' => [],
    'Administração' => [],
    'Departamentos' => [
      'Departamento de Estatística',
      'Departamento de Matemática',
      'Departamento de Matemática Aplicada',
    ],
    'Biblioteca' => [],
    'Informática' => [],
  ];

  $created_terms = [];

  $weight = 0;
  foreach ($terms_structure as $parent_name => $children) {
    // Create parent term.
    $parent_term = Term::create([
      'vid' => $vocabulary,
      'name' => $parent_name,
      'weight' => $weight++,
    ]);
    $parent_term->save();
    $created_terms[] = $parent_term;

    // Create child terms.
    $child_weight = 0;
    foreach ($children as $child_name) {
      $child_term = Term::create([
        'vid' => $vocabulary,
        'name' => $child_name,
        'parent' => $parent_term->id(),
        'weight' => $child_weight++,
      ]);
      $child_term->save();
      $created_terms[] = $child_term;
    }
  }

  // Add content translations if available.
  _structural_pages_add_term_translations($created_terms);
}

/**
 * Adds content translations to taxonomy terms.
 *
 * @param \Drupal\taxonomy\Entity\Term[] $terms
 *   The terms to translate.
 */
function _structural_pages_add_term_translations(array $terms): void {
  if (!\Drupal::moduleHandler()->moduleExists('content_translation')) {
    return;
  }

  $translations = _structural_pages_term_translations();
  $language_manager = \Drupal::languageManager();

  foreach ($translations as $langcode => $name_map) {
    if (!$language_manager->getLanguage($langcode)) {
      continue;
    }

    foreach ($terms as $term) {
      $name = $term->getName();
      if (!isset($name_map[$name])) {
        continue;
      }

      $translated_name = $name_map[$name];

      if ($term->hasTranslation($langcode)) {
        // Update existing translation if name doesn't match.
        $translation = $term->getTranslation($langcode);
        if ($translation->getName() !== $translated_name) {
          $translation->setName($translated_name);
          $translation->save();
        }
      }
      else {
        $term->addTranslation($langcode, ['name' => $translated_name]);
        $term->save();
      }
    }
  }
}

/**
 * Returns term name translations keyed by langcode.
 *
 * @return array
 *   Nested array: langcode => [english_name => translated_name].
 */
function _structural_pages_term_translations(): array {
  return [
    'pt-br' => [
      'News' => 'Notícias',
      'Events' => 'Eventos',
      'People' => 'Pessoas',
      'Institutional' => 'Institucional',
      'About' => 'Sobre',
      'Communication' => 'Comunicação',
      'Information and Services' => 'Informações e Serviços',
      'Team' => 'Equipe',
      'Management' => 'Gestão',
      'Inclusion and Belonging' => 'Inclusão e Pertencimento',
      'Undergraduate' => 'Graduação',
      'Statistics' => 'Estatística',
      'Mathematics' => 'Matemática',
      'Applied Mathematics' => 'Matemática Aplicada',
      'Mathematics Teaching' => 'Licenciatura em Matemática',
      'Graduate' => 'Pós-Graduação',
      'Statistics Program' => 'Programa de Estatística',
      'Mathematics Program' => 'Programa de Matemática',
      'Applied Mathematics Program' => 'Programa de Matemática Aplicada',
      'Research' => 'Pesquisa',
      'Extension' => 'Extensão',
      'Administration' => 'Administração',
      'Departments' => 'Departamentos',
      'Statistics Department' => 'Departamento de Estatística',
      'Mathematics Department' => 'Departamento de Matemática',
      'Applied Mathematics Department' => 'Departamento de Matemática Aplicada',
      'Library' => 'Biblioteca',
      'IT Services' => 'Informática',
    ],
  ];
}

/**
 * Implements hook_uninstall().
 */
function structural_pages_uninstall(): void {
  $entity_type_manager = \Drupal::entityTypeManager();

  // Remove nodes from module's content types.
  foreach (['section_page', 'content_page'] as $bundle) {
    $nids = \Drupal::entityQuery('node')
      ->accessCheck(FALSE)
      ->condition('type', $bundle)
      ->execute();
    if ($nids) {
      $nodes = $entity_type_manager->getStorage('node')->loadMultiple($nids);
      $entity_type_manager->getStorage('node')->delete($nodes);
      \Drupal::messenger()->addWarning(t('Deleted @count @bundle nodes.', [
        '@count' => count($nids),
        '@bundle' => $bundle,
      ]));
    }
  }

  // Remove terms from the configured vocabulary.
  $vocabulary = _structural_pages_get_vocabulary();
  $tids = \Drupal::entityQuery('taxonomy_term')
    ->accessCheck(FALSE)
    ->condition('vid', $vocabulary)
    ->execute();
  if ($tids) {
    $terms = $entity_type_manager->getStorage('taxonomy_term')->loadMultiple($tids);
    $entity_type_manager->getStorage('taxonomy_term')->delete($terms);
  }

  // Remove configurations in correct order (dependencies first).
  $configs_to_delete = [
    // Views.
    'views.view.child_pages',
    // Pathauto patterns.
    'pathauto.pattern.section_page',
    'pathauto.pattern.content_page',
    'pathauto.pattern.' . $vocabulary . '_term',
    // Entity displays.
    'core.entity_form_display.node.section_page.default',
    'core.entity_view_display.node.section_page.default',
    'core.entity_form_display.node.content_page.default',
    'core.entity_view_display.node.content_page.default',
    // Field instances.
    'field.field.node.section_page.field_site_section',
    'field.field.node.section_page.body',
    'field.field.node.content_page.field_parent_page',
    'field.field.node.content_page.field_site_section',
    'field.field.node.content_page.body',
    // Field storages (only if not used by other bundles).
    'field.storage.node.field_site_section',
    'field.storage.node.field_parent_page',
    // Node types.
    'node.type.section_page',
    'node.type.content_page',
    // Vocabulary.
    'taxonomy.vocabulary.' . $vocabulary,
  ];

  $config_factory = \Drupal::configFactory();
  foreach ($configs_to_delete as $config_name) {
    $config = $config_factory->getEditable($config_name);
    if (!$config->isNew()) {
      $config->delete();
    }
  }

  \Drupal::messenger()->addStatus(t('Structural Pages module uninstalled successfully.'));
}

/**
 * Update content_page content type name from "Guide Page" to "Content Page".
 */
function structural_pages_update_10001(): void {
  $config = \Drupal::configFactory()->getEditable('node.type.content_page');
  if (!$config->isNew()) {
    $current_name = $config->get('name');
    // Update if still using old name.
    if ($current_name === 'Guide Page') {
      $config->set('name', 'Content Page');
      $config->set('description', 'Pages with hierarchical parent-child structure for content organization.');
      $config->save();
      \Drupal::messenger()->addStatus(t('Updated content_page content type name to "Content Page".'));
    }
  }
}

/**
 * Add content translations to site_sections taxonomy terms (no-op, see 10003).
 */
function structural_pages_update_10002(): void {
}

/**
 * Add content translations to site_sections taxonomy terms (no-op, see 10004).
 */
function structural_pages_update_10003(): void {
}

/**
 * Fix content translation config and update term translations.
 */
function structural_pages_update_10004(): void {
  // Ensure content translation is properly configured for the vocabulary.
  _structural_pages_ensure_content_translation();

  $vocabulary = _structural_pages_get_vocabulary();
  $terms = \Drupal::entityTypeManager()
    ->getStorage('taxonomy_term')
    ->loadByProperties(['vid' => $vocabulary]);

  if ($terms) {
    _structural_pages_add_term_translations($terms);
  }
}

/**
 * Ensures content translation settings exist for the configured vocabulary.
 */
function _structural_pages_ensure_content_translation(): void {
  if (!\Drupal::moduleHandler()->moduleExists('content_translation')) {
    return;
  }

  $vocabulary = _structural_pages_get_vocabulary();
  $config = \Drupal\language\Entity\ContentLanguageSettings::loadByEntityTypeBundle('taxonomy_term', $vocabulary);
  $config->setDefaultLangcode('site_default');
  $config->setLanguageAlterable(TRUE);
  $config->setThirdPartySetting('content_translation', 'enabled', TRUE);
  $config->save();
}

/**
 * Implements hook_requirements().
 */
function structural_pages_requirements(string $phase): array {
  $requirements = [];

  if ($phase === 'runtime') {
    // Check if the configured vocabulary has terms.
    $vocabulary = _structural_pages_get_vocabulary();
    $term_count = \Drupal::entityQuery('taxonomy_term')
      ->accessCheck(FALSE)
      ->condition('vid', $vocabulary)
      ->count()
      ->execute();

    if ($term_count === 0) {
      $requirements['structural_pages_terms'] = [
        'title' => t('Structural Pages'),
        'value' => t('No terms in @vocabulary vocabulary', ['@vocabulary' => $vocabulary]),
        'description' => t('The Structural Pages module requires terms in the site section vocabulary. <a href=":url">Add terms</a>.', [
          ':url' => '/admin/structure/taxonomy/manage/' . $vocabulary . '/add',
        ]),
        'severity' => REQUIREMENT_WARNING,
      ];
    }
    else {
      $requirements['structural_pages_terms'] = [
        'title' => t('Structural Pages'),
        'value' => t('@count terms configured', ['@count' => $term_count]),
        'severity' => REQUIREMENT_OK,
      ];
    }
  }

  return $requirements;
}