<?php

/**
 * Implements hook_permission().
 */
function fusion_labels_permission() {
  return array(
    'administer fusion labels' =>  array(
      'title' => t('Toggle grid overlay and labels'),
    ),
  );
}

/**
 * Implements hook_block_info().
 */
function fusion_labels_block_info() {
  $blocks['fusion_region_label'] = array(
    'info' => t('Fusion Region Labels'),
    'cache' => DRUPAL_NO_CACHE,
    'weight' => -400,
    );
  return $blocks;
}

/**
 * Implements hook_block_view().
 */
function fusion_labels_block_view($delta = '') {
  $block = array();
  switch ($delta) {
    case 'fusion_region_label':
      // this will be added later using hook_page_build(), to label the region where it exists
      $block = array(
        'subject' => '',
        'content' => t('This block is for debugging.'),
        );
      break;
  }
  return $block;
}

/**
 * Implements hook_page_build().
 */
function fusion_labels_page_build(&$page) {

  // only add region labels if the fusion "theme_grid" setting is set to true.
  if (!theme_get_setting('theme_grid')) return;
  
  // check for permission.
  if (!user_access('administer fusion labels')) return false;
  
  $current_theme = $GLOBALS['theme_key'];
  $regions = system_region_list($current_theme);
  foreach ($regions as $region => $region_label) {
    
    if ($region == "help") continue;
    
    // combine block's data from db with what is provided with hook_block_view().
    $debug_block_view = module_invoke('fusion_labels', 'block_view', 'fusion_region_label');
    $debug_block_data = block_load('fusion_labels', 'fusion_region_label');
    $debug_block = (object) array_merge((array) $debug_block_data, (array) $debug_block_view);    
    $debug_block->subject = $region_label;
    
    $render_array = array( 
      '#block' => $debug_block,
      '#theme_wrappers' => array('block'),
      '#weight' => -400,
      );

    if (isset($page[$region])) {
      // add block to all regions currently in use.
      // weight doesn't seem to be respected.  append to front of the array for now.
      array_unshift($page[$region], $render_array);
    } else {
      $page[$region]['fusion_region_label'] = $render_array;
    }
  }
  
  // add a toggle.  requires page bottom region.
  if (isset($page['page_bottom'])) {
    $page['page_bottom']['fusion_label_toggle'] = array(
      '#type' => "markup",
      '#markup' => "<div id='fusion-label-toggle'>Labels</div>",
      '#attached' => array(
        'css' => array(drupal_get_path('module', 'fusion_labels') . '/fusion-labels.css'),
      ),
    );
    
    // Prints currently selected grid in upper right hand corner, below grid and label buttons.
    $responsive_displays = theme_get_setting('responsive_displays');
    if (is_array($responsive_displays)) {
      $markup = '';
      foreach ($responsive_displays as $responsive_display) {
        $width = theme_get_setting($responsive_display . '_grid_width');
        $markup .= "<div id='label_{$responsive_display}' class='debug-responsive'>{$width}</div>" . "\n";
      }
      $page['page_bottom']['fusion_grid_label'] = array(
        '#type' => "markup",
        '#markup' => $markup,
      );
    }
    drupal_add_js(drupal_get_path('module', 'fusion_labels') . '/fusion_labels.js');
  }
}

/**
 * Implements hook_form_system_theme_settings_alter().
 */
function fusion_labels_form_system_theme_settings_alter(&$form, &$form_state) {
  
  //skip these changes on the global settings page
  if(empty($form_state['build_info']['args'])){
    return;
  } 
  // only add option to fusion themes.
  $theme_name = $form_state['build_info']['args'][0];
  $theme_list = list_themes();
  // Only add these options to Fusion themes.
  if (!_fusion_accelerator_fusion_based($theme_list, $theme_name)) {
    return;
  }

  $form['tnt_container']['general_settings']['theme_grid_config']['grid_mask'] = array(
    '#type' => 'checkbox',
    '#title' => t('Enable grid overlay mask for administrators.'),
    '#default_value' => theme_get_setting('grid_mask', $theme_name),
    '#description' => t('Adds "GRID" button in the upper right corner to toggle a grid overlay and block outlines, which can help with visualizing page layout and block positioning.'),
    '#weight' => 20,
  );

}