<?php

namespace Drupal\ds\Plugin\views\row;

use Drupal\Component\Utility\Html;
use Drupal\Component\Utility\Unicode;
use Drupal\Core\Form\FormStateInterface;
use Drupal\views\Plugin\views\PluginBase;
use Drupal\views\Plugin\views\row\EntityRow as ViewsEntityRow;

/**
 * Generic entity row plugin to provide a common base for all entity types.
 *
 * @ViewsRow(
 *   id = "ds_entity",
 *   deriver = "Drupal\ds\Plugin\Derivative\DsEntityRow"
 * )
 */
class EntityRow extends ViewsEntityRow {

  /**
   * {@inheritdoc}
   */
  public function query() {
    parent::query();

    $delta_fields = $this->options['delta_fieldset']['delta_fields'];
    if (!empty($delta_fields)) {
      foreach ($delta_fields as $field) {
        $table_name = $this->entityTypeId . '__' . $field;
        $field_name_delta = $field . '_delta';
        $this->view->query->addField($table_name, 'delta', $field_name_delta);
      }
    }
  }

  /**
   * Contains an array of render arrays, one for each rendered entity.
   *
   * @var array
   */
  protected $build = [];

  /**
   * {@inheritdoc}
   */
  protected function defineOptions() {
    $options = parent::defineOptions();

    $options['alternating_fieldset'] = [
      'contains' => [
        'alternating' => ['default' => FALSE, 'bool' => TRUE],
        'allpages' => ['default' => FALSE, 'bool' => TRUE],
        'item' => [
          'default' => [],
        ],
      ],
    ];
    $options['grouping_fieldset'] = [
      'contains' => [
        'group' => ['default' => FALSE, 'bool' => TRUE],
        'group_field' => ['default' => ''],
        'group_field_function' => ['default' => ''],
      ],
    ];
    $options['advanced_fieldset'] = [
      'contains' => [
        'advanced' => ['default' => FALSE, 'bool' => TRUE],
      ],
    ];
    $options['switch_fieldset'] = [
      'contains' => [
        'switch' => ['default' => FALSE, 'bool' => TRUE],
      ],
    ];
    $options['delta_fieldset'] = [
      'contains' => [
        'delta_fields' => ['default' => []],
      ],
    ];
    return $options;
  }

  /**
   * {@inheritdoc}
   */
  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    parent::buildOptionsForm($form, $form_state);

    // Use view mode of display settings.
    if ($this->entityType == 'node' && \Drupal::moduleHandler()->moduleExists('ds_switch_view_mode')) {
      $form['switch_fieldset'] = [
        '#type' => 'details',
        '#title' => $this->t('Use view mode of display settings'),
        '#open' => $this->options['switch_fieldset']['switch'],
      ];
      $form['switch_fieldset']['switch'] = [
        '#type' => 'checkbox',
        '#title' => $this->t('Use view mode of display settings'),
        '#default_value' => $this->options['switch_fieldset']['switch'],
        '#description' => $this->t('Use the alternative view mode selected in the display settings tab.'),
      ];
    }

    // Alternating view modes.
    $form['alternating_fieldset'] = [
      '#type' => 'details',
      '#title' => $this->t('Alternating view mode'),
      '#open' => $this->options['alternating_fieldset']['alternating'],
    ];
    $form['alternating_fieldset']['alternating'] = [
      '#type' => 'checkbox',
      '#title' => $this->t('Use the changing view mode selector'),
      '#default_value' => $this->options['alternating_fieldset']['alternating'],
    ];
    $form['alternating_fieldset']['allpages'] = [
      '#type' => 'checkbox',
      '#title' => $this->t('Use this configuration on every page. Otherwise the default view mode is used as soon as you browse away from the first page of this view.'),
      '#default_value' => (isset($this->options['alternating_fieldset']['allpages'])) ? $this->options['alternating_fieldset']['allpages'] : FALSE,
    ];

    $pager = $this->view->display_handler->getPlugin('pager');
    $limit = $pager->getItemsPerPage();
    if ($limit == 0 || $limit > 20) {
      $form['alternating_fieldset']['disabled'] = [
        '#markup' => $this->t('This option is disabled because you have unlimited items or listing more than 20 items.'),
      ];
      $form['alternating_fieldset']['alternating']['#disabled'] = TRUE;
      $form['alternating_fieldset']['allpages']['#disabled'] = TRUE;
    }
    else {
      $i = 1;
      $a = 0;
      while ($limit != 0) {
        $form['alternating_fieldset']['item_' . $a] = [
          '#title' => $this->t('Item @nr', ['@nr' => $i]),
          '#type' => 'select',
          '#default_value' => (isset($this->options['alternating_fieldset']['item_' . $a])) ? $this->options['alternating_fieldset']['item_' . $a] : 'teaser',
          '#options' => \Drupal::service('entity_display.repository')->getViewModeOptions($this->entityTypeId),
          '#states' => [
            'visible' => [
              ':input[name="row_options[alternating_fieldset][alternating]"]' => ['checked' => TRUE],
            ],
          ],
        ];
        $limit--;
        $a++;
        $i++;
      }
    }

    // Grouping rows.
    $sorts = $this->view->display_handler->getOption('sorts');
    $groupable = !empty($sorts) && $this->options['grouping_fieldset']['group'];

    $form['grouping_fieldset'] = [
      '#type' => 'details',
      '#title' => $this->t('Group data'),
      '#open' => $groupable,
    ];
    $form['grouping_fieldset']['group'] = [
      '#type' => 'checkbox',
      '#title' => $this->t('Group data on a field. The value of this field will be displayed too.'),
      '#default_value' => $groupable,
    ];

    if (!empty($sorts)) {
      $sort_options = [];
      foreach ($sorts as $sort) {
        $sort_name = Unicode::ucfirst($sort['field']);
        $sort_options[$sort['table'] . '|' . $sort['field']] = $sort_name;
      }

      $form['grouping_fieldset']['group_field'] = [
        '#type' => 'select',
        '#options' => $sort_options,
        '#default_value' => isset($this->options['grouping_fieldset']['group_field']) ? $this->options['grouping_fieldset']['group_field'] : '',
      ];
      $form['grouping_fieldset']['group_field_function'] = [
        '#type' => 'textfield',
        '#title' => 'Heading function',
        '#description' => Html::escape(t('The value of the field can be in a very raw format (eg, date created). Enter a custom function which you can use to format that value. The value and the object will be passed into that function eg. custom_function($raw_value, $object);')),
        '#default_value' => isset($this->options['grouping_fieldset']['group_field_function']) ? $this->options['grouping_fieldset']['group_field_function'] : '',
      ];
    }
    else {
      $form['grouping_fieldset']['group']['#disabled'] = TRUE;
      $form['grouping_fieldset']['group']['#description'] = $this->t('Grouping is disabled because you do not have any sort fields.');
    }

    // Delta fields.
    $delta_fields = [];
    $fields = \Drupal::service('entity_field.manager')->getFieldStorageDefinitions($this->entityTypeId);
    /** @var \Drupal\Core\Field\FieldStorageDefinitionInterface $field */
    foreach ($fields as $key => $field) {
      if ($field->getCardinality() != 1) {
        $delta_fields[$key] = $key;
      }
    }
    $form['delta_fieldset'] = array(
      '#type' => 'fieldset',
      '#title' => t('Delta fields'),
      '#collapsible' => TRUE,
      '#collapsed' => empty($this->options['delta_fields']),
    );
    $form['delta_fieldset']['delta_fields'] = array(
      '#type' => 'select',
      '#title' => t('Select fields'),
      '#description' => t('Select fields which "delta" value should be added to the result row. On the manage display of an entity you can decide to look for this delta value to only print that row.'),
      '#options' => $delta_fields,
      '#multiple' => TRUE,
      '#default_value' => !empty($this->options['delta_fieldset']['delta_fields']) ? $this->options['delta_fieldset']['delta_fields'] : '',
    );

    // Advanced function.
    $form['advanced_fieldset'] = [
      '#type' => 'details',
      '#title' => $this->t('Advanced view mode'),
      '#open' => $this->options['advanced_fieldset']['advanced'],
    ];
    $form['advanced_fieldset']['advanced'] = [
      '#type' => 'checkbox',
      '#title' => $this->t('Use the advanced view mode selector'),
      '#description' => $this->t('This gives you the opportunity to have full control of a list for really advanced features.<br /> There is no UI for this, you need to create a hook named like this: hook_ds_views_row_render_entity($entity, $view_mode).', ['@VIEWSNAME' => $this->view->storage->id()]),
      '#default_value' => $this->options['advanced_fieldset']['advanced'],
    ];
  }

  /**
   * {@inheritdoc}
   */
  protected function getEntityTranslationRenderer() {
    if (!isset($this->entityLanguageRenderer)) {
      $view = $this->getView();
      $rendering_language = $view->display_handler->getOption('rendering_language');
      $langcode = NULL;
      $dynamic_renderers = [
        '***LANGUAGE_entity_translation***' => 'TranslationLanguageRenderer',
        '***LANGUAGE_entity_default***' => 'DefaultLanguageRenderer',
      ];
      if (isset($dynamic_renderers[$rendering_language])) {
        // Dynamic language set based on result rows or instance defaults.
        $renderer = $dynamic_renderers[$rendering_language];
      }
      else {
        if (strpos($rendering_language, '***LANGUAGE_') !== FALSE) {
          $langcode = PluginBase::queryLanguageSubstitutions()[$rendering_language];
        }
        else {
          // Specific langcode set.
          $langcode = $rendering_language;
        }
        $renderer = 'ConfigurableLanguageRenderer';
      }
      $class = '\Drupal\ds\Plugin\views\Entity\Render\\' . $renderer;
      $entity_type = \Drupal::service('entity_type.manager')->getDefinition($this->getEntityTypeId());
      $this->entityLanguageRenderer = new $class($view, $this->getLanguageManager(), $entity_type, $langcode);
    }
    return $this->entityLanguageRenderer;
  }

}
