<?php

/**
 * Implements hook_ds_layout_settings_info().
 */
function _ds_layout_settings_info($bundle_name, $instances) {
  $region_right = array();
  $region_left = array();
  $prop_fields = array();
  $summary_fields = array();
  $data_sequence_fields = array();
  $all_other_fields = array();
  $fields_with_regions = array();
  $i = 0;

  try {
    // Get the bundle and term objects.
    $bundle = tripal_load_bundle_entity(array('name' => $bundle_name));
    $term = tripal_load_term_entity(array('term_id' => $bundle->term_id));

    // Iterate through the fields of this bundle.
    foreach ($instances as $key => $instance){
      $instance_name = $instance['field_name'];
      if($instance_name=="rdfs__type"){
        array_push($summary_fields, $instance_name);
        $fields_with_regions[$instance_name]= 'right';

      }
      else {
        //TODO: How do we handle non-chado dbs, placement of fields within
        // tripal panes might need to be done in a hook.
        $instance_base_table = array_key_exists('base_table', $instance['settings']) ? $instance['settings']['base_table'] : '';
        $instance_base_chado = array_key_exists('chado_table', $instance['settings']) ? $instance['settings']['chado_table'] : '';
        $prop_table = strpos($instance_base_chado, 'prop');
        $data_sequence = strpos($instance_name, 'data__sequence');

        if ($instance_base_chado && $instance_base_table){

          if ($instance_base_chado == $instance_base_table){
            if ($prop_table !== FALSE){
              // Properties section instances.
              array_push($prop_fields, $instance_name);
              $fields_with_regions[$instance_name]= 'right';

            }
            elseif ($data_sequence !== FALSE) {
              // Data sequence section instances.
              array_push($data_sequence_fields, $instance_name);
              $fields_with_regions[$instance_name] = 'right';

            }
            else {
              // Overview section instances.
              array_push($summary_fields, $instance_name);
              $fields_with_regions[$instance_name] = 'right';
            }

          }
          elseif ($instance_base_chado != $instance_base_table){
            if ($prop_table !== FALSE){
              // Properties section instances.
              array_push($prop_fields, $instance_name);
              $fields_with_regions[$instance_name]= 'right';

            }
            elseif ($data_sequence !== FALSE){
              // Data sequence section instances.
              array_push($data_sequence_fields, $instance_name);
              $fields_with_regions[$instance_name]= 'right';

            }
            else {
              // Linker section instances.
              array_push($all_other_fields, $instance);
              $fields_with_regions[$instance_name]= 'right';

              // Update the display settings so that the title is hidden.
              $instance['display']['default']['label'] = 'hidden';
              field_update_instance($instance);
            }
          }
        }
        else {
          // The tripal_chado module adds an image to the organism content
          // type so we want to make sure that image goes in the summary.
          // It is not a TripalField so it won't have a chado table.
          if ($instance_name == 'data__image' and $term->name == 'organism') {
            array_push($summary_fields, $instance_name);
            $fields_with_regions[$instance_name] = 'right';
          }
        }
      }
      $i++;
    }

    // Consolidate the field sets.
    if(!empty($summary_fields)){
      _summary_field_group_info($bundle_name, $summary_fields);

      // Add the fields to the regions.
      array_unshift($summary_fields, 'group_summary_tripalpane', 'group_summary', 'group_summary_table');
      $fields_with_regions += [ 'group_summary_tripalpane' =>'right', 'group_summary' => 'right', 'group_summary_table' => 'right' ];
      $region_right = array_merge($summary_fields, $region_right);

    }
    if (!empty($prop_fields)){
      _prop_field_group_info($bundle_name, $prop_fields);
      array_unshift($prop_fields, 'group_prop_tripalpane', 'group_prop', 'group_prop_table');

      // Add the fields to the regions.
      $region_right = array_merge($region_right, $prop_fields);
      $fields_with_regions += [ 'group_prop_tripalpane' => 'right', 'group_prop' => 'right', 'group_prop_table' => 'right' ];
    }
    if (!empty($data_sequence_fields)){
      _data_sequence_field_group_info($bundle_name, $data_sequence_fields);
      array_unshift($data_sequence_fields, 'group_sequence_tripalpane', 'group_sequence', 'group_sequence_table');

      // Add the fields to the regions.
      $region_right = array_merge($region_right, $data_sequence_fields);
      $fields_with_regions += [ 'group_sequence_tripalpane' => 'right', 'group_sequence' => 'right', 'group_sequence_table' => 'right' ];
    }
    if (!empty($all_other_fields)){
      foreach ($all_other_fields as $key => $other_field) {
        // Temporary field names.
        $temporary_field = array();
        $group_field_name = 'gp_'.$other_field['field_name'];
        $fieldset_field_name = 'ft_'.$other_field['field_name'];

        // Need to truncate the names because of database field size restrictions,
        // updating fields here to ensure name consistency.
        $group_field_name = substr($group_field_name, 0, 27);
        $fieldset_field_name = substr($fieldset_field_name, 0, 27);

        // Add randomm numbers to ensure the field name is unique within the 32
        // character limit of the field.
        $group_field_name = $group_field_name.rand(0, 99999);
        $fieldset_field_name = $fieldset_field_name.rand(0, 99999);

        // Build the field group.
        _additional_fields_field_group_info($bundle_name, $other_field['label'], $group_field_name, $fieldset_field_name, $other_field['field_name']);

        // Update arrays.
        array_push($temporary_field, $group_field_name, $fieldset_field_name, $other_field['field_name']);
        $region_right = array_merge($region_right, $temporary_field);
        $fields_with_regions += [ $group_field_name => 'right', $fieldset_field_name => 'right' ];
      }
    }

    // Add blocks to $region_left and build the toc field that is placed within.
    _ds_fields_info_write($bundle_name);
    $region_left += [ 'toc' ];
    $fields_with_regions += [ 'toc' => 'left' ];
    // Build the ds layout.
    $record = new stdClass;
    $record->id ='TripalEntity|' . $bundle_name . '|default';
    $record->entity_type = 'TripalEntity';
    $record->bundle = $bundle_name;
    $record->view_mode = 'default';
    $record->layout = 'tripal_ds_feature';
    $settings = array(
      'regions' => array(
        'left' =>
          $region_left,
        'right' =>
          $region_right,
      ),
      'fields' =>
        $fields_with_regions,
      'classes' => array(),
      'wrappers' => array(
        'left' => 'div',
        'right' => 'div',
      ),
      'layout_wrapper' => 'div',
      'layout_attributes' => '',
      'layout_attributes_merge' => 1,
      'layout_link_attribute' => '',
      'layout_link_custom' => '',
      'layout_disable_css' => 0,
    );
    $record->settings = $settings;
    drupal_write_record('ds_layout_settings', $record);
  }
  catch (Exception $e) {
    watchdog_exception('tripal_ds', $e);
    return FALSE;
  }
  return TRUE;
}


/**
 * Implements hook_ds_fields_info().
 */
function tripal_ds_ds_fields_info($entity_type) {
  $fields = array();

  $fields['toc'] = array(
  'title' => t('Table of Contents'),
  'field_type' => DS_FIELD_TYPE_FUNCTION,
  'function' => 'tripal_ds_toc_block',
  );
  return array('TripalEntity' => $fields);
}

/**
 *
 * @param $entity_type
 * @return
 */
function tripal_ds_toc_block($entity_type) {
  $bundle_name = $entity_type['bundle'];
  $toc = views_embed_view('tripal_content_type_toc', 'block', $bundle_name);
  return $toc;
}

function _ds_fields_info_write($bundle_name) {
  $fields = new stdClass;
  $fields->id ='TripalEntity|' . $bundle_name . '|default';
  $fields->entity_type = 'TripalEntity';
  $fields->bundle = $bundle_name;
  $fields->view_mode = 'default';
  $fields->settings = array(
    'toc' => array(
      'weight' => 0,
      'label' => 'hidden',
      'format' => 'default',
    ),
  );
  drupal_write_record('ds_field_settings', $fields);
}