<?php

/**
 * @file
 * Contains opencase.module.
 */

use Drupal\Core\Routing\RouteMatchInterface;


/**
 * Implements hook_block_access
 *
 * Forbids the opencase_contextual_menu block on pages where it has no content.
 * (Without this, it was displaying an empty sidebar)
 */
function opencase_block_access(\Drupal\block\Entity\Block $block, $operation, \Drupal\Core\Session\AccountInterface $account) {
  if ($operation == 'view' && $block->getPluginId() == 'opencase_contextual_menu') {
    $route_name = \Drupal::routeMatch()->getRouteName();
    $routes_where_it_should_be_shown = [
      'entity.oc_actor.canonical',
      'entity.oc_actor.edit_form',
      'view.cases.page_1',
      'entity.oc_case.canonical',
      'entity.oc_case.edit_form',
      'entity.oc_case.add_form',
      'view.activities.page_1',
      'entity.oc_activity.canonical',
      'entity.oc_activity.edit_form',
      'entity.oc_activity.add_form'
    ];
    return \Drupal\Core\Access\AccessResult::forbiddenIf(!in_array($route_name, $routes_where_it_should_be_shown))
      ->addCacheableDependency($block);
  }

  // No opinion.
  return \Drupal\Core\Access\AccessResult::neutral();
}


/**
 * Implements hook_page_attachments
 *
 * Add the opencase library to every page
 */
function opencase_page_attachments(array &$page) {
  $page['#attached']['library'][] = 'opencase/opencase-lib';
}


/**
 * Implements hook_link_alter
 *
 * Makes menu items that are external links open in new tab.
 */
function opencase_link_alter(&$variables) {
  if ($variables['url']->isExternal()) {
    $variables['options']['attributes'] = ['target' => '_blank'];
  }
}

/**
 * Implements hook_preprocess_page_title
 *  
 * Modify the page title to include more information 
 */
function opencase_preprocess_page_title(&$variables) {
  
   $route_name = \Drupal::routeMatch()->getRouteName();
    switch ($route_name) {
      case 'entity.oc_case.canonical':
        $case = \Drupal::routeMatch()->getParameter('oc_case');
        $variables['title'] = $case->getName() . ": Case Details and Files";
        break;
      case 'view.cases.page_1':
        $actor_id = \Drupal::routeMatch()->getParameter('actor_id');
        $actor = \Drupal::entityTypeManager()->getStorage('oc_actor')->load($actor_id); 
        $variables['title'] = $actor->getName() . ": Cases";
        break;
      case 'view.activities.page_1':
        $case_id = \Drupal::routeMatch()->getParameter('case_id');
        $case = \Drupal::entityTypeManager()->getStorage('oc_case')->load($case_id); 
        $variables['title'] = $case->getName() . ": Activities";
        break;
    }
}

/**
 * Implements hook_help().
 */
function opencase_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    // Main module help for the opencase module.
    case 'help.page.opencase':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('Simple Case Management') . '</p>';
      return $output;

    default:
  }
}

/**
 * Implements hook_theme().
 */
function opencase_theme() {
  return [
    'opencase' => [
      'render element' => 'children',
    ],
  ];
}

function opencase_form_oc_case_type_add_form_alter(&$form, $form_state) {
  opencase_configure_actor_types($form);
}

function opencase_form_oc_case_type_edit_form_alter(&$form, $form_state) {
  opencase_configure_actor_types($form);
  $form['actor_types']['#default_value'] = array();
  $case_type_machine_name = $form['id']['#default_value'];
  $base_field_override = \Drupal\Core\Field\Entity\BaseFieldOverride::load("oc_case.$case_type_machine_name.actors_involved");
  if ($base_field_override) opencase_load_default_actor_types($form, $base_field_override);
}

// Take the base field override configuration, 
// extract list of actor types that are allowed for the case type
// and put these into the default values for the checkboxes
function opencase_load_default_actor_types(&$form, $base_field_override) {
  $actor_types =  $base_field_override->getSettings()['handler_settings']['target_bundles'];
  // example of the $actor_types array: ['client' => 'client', 'volunteer' => 0]
  foreach($actor_types as $machine_name => $value) {
    if ($value) {
      $form['actor_types']['#default_value'][] = $machine_name;        
    }
  }
}

function opencase_configure_actor_types(&$form) {
  $actor_types = \Drupal::service('entity_type.bundle.info')->getBundleInfo('oc_actor');
  $options = array();
  foreach($actor_types as $machine_name => $info) {
    $options[$machine_name] = $info['label'];
  }
  $form['actor_types'] = array(
    '#title' => t('Actor types'),
    '#description' => t('Types of people that can be involved in this kind of case.'),
    '#type' => 'checkboxes',
    '#options' => $options
  );
  $form['actions']['submit']['#submit'][] = 'opencase_configure_actor_types_submit';
}

function opencase_configure_actor_types_submit($form, $form_state) {
  $case_type_machine_name = $form['id']['#default_value'] ? $form['id']['#default_value'] : $form_state->getValue('id');
  $base_field_override = \Drupal\Core\Field\Entity\BaseFieldOverride::load("oc_case.$case_type_machine_name.actors_involved");
  if (!$base_field_override) {
    $entity_fields = \Drupal::service('entity_field.manager')->getBaseFieldDefinitions('oc_case');
    $field_definition = $entity_fields['actors_involved'];
    $base_field_override = \Drupal\Core\field\Entity\BaseFieldOverride::createFromBaseFieldDefinition($field_definition, $case_type_machine_name);
  }
  $base_field_override->setSetting('handler_settings', ['target_bundles' => $form_state->getValue('actor_types')]);
  $base_field_override->save();
}