<?php

/**
 * @file
 *   The implementation of Nivo Formatter module.
 */

/**
 * Implements hook_field_formatter_info().
 * 
 * Add nivo_formatter formatter.
 */
function nivo_formatter_field_formatter_info() {
  $formatters = array(
    'nivo_formatter' => array(
      'label' => t('Nivo formatter'),
      'field types' => array('image', 'linkimagefield'),
      'settings' => array(
        'nivo_formatter_theme' => 'default',
        'nivo_formatter_image_style' => 'large',
        'nivo_slider_thumbnail' => array(
          'controlNavThumbs' => FALSE,
          'controlNavThumbsFromRel' => FALSE,
          'thumbnail_style' => 'thumbnail',
        ),
        'nivo_formatter_nivo_slider' => array(
          'effect' => array('random' => 'random'),
          'slices' => 15,
          'boxCols' => 8,
          'boxRows' => 4,
          'animSpeed' => 500,
          'pauseTime' => 3000,
          'startSlide' => 0,
          'directionNav' => TRUE,
          'directionNavHide' => TRUE,
          'controlNav' => TRUE,
          'keyboardNav' => TRUE,
          'pauseOnHover' => TRUE,
          'manualAdvance' => FALSE,
          'captionOpacity' => 0.8,
          'prevText' => 'Prev',
          'nextText' => 'Next',
//          'beforeChange' => 'function(){}',
//          'afterChange' => 'function(){}',
//          'slideshowEnd' => 'function(){}',
//          'lastSlide' => 'function(){}',
//          'afterLoad' => 'function(){}',
        ),
      ), //@todo
      'description' => t('The world\'s most awesome jQuery Image Slider'),
    )
  );
  return $formatters;
}

/**
 * Implements hook_field_formatter_view().
 */
function nivo_formatter_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {
  // if there are no images, dont do anything else
  if (empty($items)) {
    return;
  }
  $field_name = $instance['field_name'];
  $entity_type_info = entity_get_info($entity_type);
  $entity_id = $entity->{$entity_type_info['entity keys']['id']};
  // Get field instance setting
  $settings = $display['settings'];
  // Setting image style, theme for Nivo Slider
  $theme = $settings['nivo_formatter_theme'];
  $style = $settings['nivo_formatter_image_style'];
  $thumb_style = $settings['nivo_slider_thumbnail']['thumbnail_style'];
  $isThumb = FALSE;
  // Include Nivo Slider assets
  $path = libraries_get_path('nivo-slider') . '/';
  $module_path = drupal_get_path('module', 'nivo_formatter');

  drupal_add_css($path . "themes/$theme/$theme.css");
  drupal_add_css($path . "nivo-slider.css");
  drupal_add_js($path . "jquery.nivo.slider.pack.js");
  drupal_add_js($module_path . '/nivo_formatter.js');
  drupal_add_js(array('nivo_formatter' => nivo_formatter_settings($field_name.'-'.$entity_id, $settings)), 'setting');

  // Prepare images
  $renderitems = array();

  foreach ($items as $id => $item) {
    $image = '';
    $attributes = array();

    // Generate thumbnail if needed.
    if ($settings['nivo_slider_thumbnail']['controlNavThumbs']) {
      $isThumb = TRUE;
      drupal_add_css($module_path . '/nivo_formatter.css', array('group' => CSS_THEME));
      // Check thumb style
      if (!empty($thumb_style)) {
        $attributes['data-thumb'] = image_style_url($thumb_style, $item['uri']);
      }
      else {
        $attributes['data-thumb'] = file_create_url($item['uri']);
      }
    $attributes['rel']=$attributes['data-thumb'];
    }
    
    // Generate image
    if (!empty($style)) {
      $image = theme_image_style(array(
        'style_name' => $style,
        'path' => $item['uri'],
        'alt' => isset($item['alt']) ? $item['alt'] : FALSE,
        'title' => isset($item['title']) ? $item['title'] : FALSE,
        'attributes' => $attributes,
        'width' => '',
        'height' => '',
      ));
    }
    else {
      $image = theme_image(array(
        'path' => $item['uri'],
        'alt' => isset($item['alt']) ? $item['alt'] : FALSE,
        'title' => isset($item['title']) ? $item['title'] : FALSE,
        'attributes' => $attributes,
      ));
    }

    $renderitems['images'][] = $image;
  }

  // Format
  $element = array();
  $element['#theme'] = 'nivo_formatter';
  $element['#images'] = $renderitems['images'];
  $element['#nivo_slider_theme'] = $theme;
  $element['#field_name'] = $field_name .'-'. $entity_id;
  $element['#isThumb'] = $isThumb;
  $element['#raws'] = $items;
  return $element;
}

/**
 * Implements hook_field_formatter_settings_form().
 * @see http://nivo.dev7studios.com/support/jquery-plugin-usage/
 */
function nivo_formatter_field_formatter_settings_form($field, $instance, $view_mode, $form, &$form_state) {
  $form = array();
  $nivo_slider_effect = array(
    'sliceDown',
    'sliceDownLeft',
    'sliceUp',
    'sliceUpLeft',
    'sliceUpDown',
    'sliceUpDownLeft',
    'fold',
    'fade',
    'random',
    'slideInRight',
    'slideInLeft',
    'boxRandom',
    'boxRain',
    'boxRainReverse',
    'boxRainGrow',
    'boxRainGrowReverse'
  );
  $options = array(t('None'));
  foreach (image_styles() as $id => $style) {
    $options[$id] = $id;
  }
  $settings = $instance['display'][$view_mode]['settings'];
  $themes = nivo_formatter_nivo_slider_themes();

  // -- Basic settings --
  $form['nivo_formatter_theme'] = array(
    '#type' => 'select',
    '#title' => t('Nivo slider theme'),
    '#options' => $themes,
    '#default_value' => $settings['nivo_formatter_theme'],
    '#description' => t('Select your nivo slider theme.'),
  );
  $form['nivo_formatter_image_style'] = array(
    '#type' => 'select',
    '#title' => t('Select image style'),
    '#options' => $options,
    '#default_value' => $settings['nivo_formatter_image_style'],
    '#description' => t('Select the image style you would like to show.'),
  );
  // -- End of Basic settings --
  // -- Thumbnail settings --
  $form['nivo_slider_thumbnail'] = array(
    '#type' => 'fieldset',
    '#title' => t('Nivo Slider thumbnail settings'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
    '#tree' => TRUE,
  );
  $form['nivo_slider_thumbnail']['controlNavThumbs'] = array(
    '#type' => 'checkbox',
    '#return_value' => TRUE,
    '#title' => t('Enable navigation thumbnail'),
    '#default_value' => $settings['nivo_slider_thumbnail']['controlNavThumbs'],
    '#description' => t('Using Thumbnails with the Nivo Slider'),
  );
  $form['nivo_slider_thumbnail']['thumbnail_style'] = array(
    '#type' => 'select',
    '#title' => t('Select thumbnail image style'),
    '#options' => $options,
    '#default_value' => $settings['nivo_slider_thumbnail']['thumbnail_style'],
    '#description' => t('Select the image style you would like thumbnail to show.'),
  );
  // -- End thumbnail settings --
  // -- Advanced settings --
  $form['nivo_formatter_nivo_slider'] = array(
    '#type' => 'fieldset',
    '#title' => t('Nivo Slider advanced settings'),
    '#collapsible' => TRUE,
    '#collapsed' => TRUE,
    '#tree' => TRUE,
  );
  $form['nivo_formatter_nivo_slider']['effect'] = array(
    '#type' => 'select',
    '#title' => t('effect'),
    '#options' => array_combine($nivo_slider_effect, $nivo_slider_effect),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['effect'],
    '#description' => t('Specify sets like: \'fold,fade,sliceDown\''),
    '#multiple' => TRUE,
  );
  $form['nivo_formatter_nivo_slider']['slices'] = array(
    '#type' => 'textfield',
    '#title' => t('slices'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['slices'],
    '#description' => t('For slice animations.'),
  );
  $form['nivo_formatter_nivo_slider']['boxCols'] = array(
    '#type' => 'textfield',
    '#title' => t('boxCols'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['boxCols'],
    '#description' => t('For box animations.'),
  );
  $form['nivo_formatter_nivo_slider']['boxRows'] = array(
    '#type' => 'textfield',
    '#title' => t('boxRows'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['boxRows'],
    '#description' => t('For box animations.'),
  );
  $form['nivo_formatter_nivo_slider']['animSpeed'] = array(
    '#type' => 'textfield',
    '#title' => t('animSpeed'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['animSpeed'],
    '#description' => t('Slide transition speed.'),
  );
  $form['nivo_formatter_nivo_slider']['pauseTime'] = array(
    '#type' => 'textfield',
    '#title' => t('pauseTime'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['pauseTime'],
    '#description' => t('How long each slide will show.'),
  );
  $form['nivo_formatter_nivo_slider']['startSlide'] = array(
    '#type' => 'textfield',
    '#title' => t('startSlide'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['startSlide'],
    '#description' => t('Set starting Slide (0 index).'),
  );
  $form['nivo_formatter_nivo_slider']['directionNav'] = array(
    '#type' => 'textfield',
    '#title' => t('directionNav'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['directionNav'],
    '#description' => t('Next & Prev navigation.'),
  );
  $form['nivo_formatter_nivo_slider']['directionNavHide'] = array(
    '#type' => 'checkbox',
    '#return_value' => TRUE,
    '#title' => t('directionNavHide'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['directionNavHide'],
    '#description' => t('Only show on hover.'),
  );
  $form['nivo_formatter_nivo_slider']['controlNav'] = array(
    '#type' => 'checkbox',
    '#return_value' => TRUE,
    '#title' => t('controlNav'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['controlNav'],
    '#description' => t('1,2,3... navigation.'),
  );
  $form['nivo_formatter_nivo_slider']['keyboardNav'] = array(
    '#type' => 'checkbox',
    '#return_value' => TRUE,
    '#title' => t('keyboardNav'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['keyboardNav'],
    '#description' => t('Use left & right arrows.'),
  );
  $form['nivo_formatter_nivo_slider']['pauseOnHover'] = array(
    '#type' => 'checkbox',
    '#return_value' => TRUE,
    '#title' => t('pauseOnHover'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['pauseOnHover'],
    '#description' => t('Stop animation while hovering.'),
  );
  $form['nivo_formatter_nivo_slider']['manualAdvance'] = array(
    '#type' => 'checkbox',
    '#return_value' => TRUE,
    '#title' => t('manualAdvance'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['manualAdvance'],
    '#description' => t('Stop animation while hovering.'),
  );
  $form['nivo_formatter_nivo_slider']['captionOpacity'] = array(
    '#type' => 'textfield',
    '#title' => t('captionOpacity'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['captionOpacity'],
    '#description' => t('Universal caption opacity.'),
  );
  $form['nivo_formatter_nivo_slider']['prevText'] = array(
    '#type' => 'textfield',
    '#title' => t('prevText'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['prevText'],
    '#description' => t('Prev directionNav text.'),
  );
  $form['nivo_formatter_nivo_slider']['nextText'] = array(
    '#type' => 'textfield',
    '#title' => t('Next'),
    '#default_value' => $settings['nivo_formatter_nivo_slider']['nextText'],
    '#description' => t('Next directionNav text.'),
  );
//  $form['nivo_formatter']['nivo_slider']['beforeChange'] = array(
//    '#type' => 'textarea',
//    '#title' => t('beforeChange'),
//    '#default_value' => $settings['nivo_formatter_nivo_slider']['beforeChange'],
//    '#description' => t('Triggers before a slide transition.'),
//  );
//  $form['nivo_formatter']['nivo_slider']['afterChange'] = array(
//    '#type' => 'textarea',
//    '#title' => t('afterChange'),
//    '#default_value' => $settings['nivo_formatter_nivo_slider']['afterChange'],
//    '#description' => t('Triggers after a slide transition.'),
//  );
//  $form['nivo_formatter']['nivo_slider']['slideshowEnd'] = array(
//    '#type' => 'textarea',
//    '#title' => t('slideshowEnd'),
//    '#default_value' => $settings['nivo_formatter_nivo_slider']['slideshowEnd'],
//    '#description' => t('Triggers after all slides have been shown.'),
//  );
//  $form['nivo_formatter']['nivo_slider']['lastSlide'] = array(
//    '#type' => 'textarea',
//    '#title' => t('lastSlide'),
//    '#default_value' => $settings['nivo_formatter_nivo_slider']['lastSlide'],
//    '#description' => t('Triggers when last slide is shown.'),
//  );
//  $form['nivo_formatter']['nivo_slider']['afterLoad'] = array(
//    '#type' => 'textarea',
//    '#title' => t('afterLoad'),
//    '#default_value' => $settings['nivo_formatter_nivo_slider']['afterLoad'],
//    '#description' => t('Triggers when slider has loaded.'),
//  );
  // -- End of Advanced settings --

  return $form;
}

/**
 * Implements hook_field_formatter_settings_summary().
 */
function nivo_formatter_field_formatter_settings_summary($field, $instance, $view_mode) {
  $display = $instance['display'][$view_mode];
  $settings = $display['settings'];

  $summary = '';

  if ($display['type'] == 'nivo_formatter') {
    $message = 'You are using Nivo slider with theme: <strong>@theme</strong> and image style: <strong>@style</strong><br>';
    if ($settings['nivo_slider_thumbnail']['controlNavThumbs']) {
      $message .= 'You have enabled thumbnail with image style <strong>@thumb_style</strong><br>';
    }

    $summary = t($message, array(
      '@theme' => $settings['nivo_formatter_theme'],
      '@style' => !empty($settings['nivo_formatter_image_style']) ? $settings['nivo_formatter_image_style'] : t('None (original image)'),
      '@thumb_style' => !empty($settings['nivo_slider_thumbnail']['thumbnail_style']) ? $settings['nivo_slider_thumbnail']['thumbnail_style'] : t('None (original image)'),
            ));
  }

  return $summary;
}

/**
 * Implements hook_theme().
 */
function nivo_formatter_theme() {
  return array(
    'nivo_formatter' => array(
      'variables' => array('images' => NULL, 'nivo_slider_theme' => 'default', 'field_name' => NULL, 'isThumb' => FALSE, 'raws' => NULL),
      'template' => 'nivo_formatter',
    )
  );
}

/**
 * Scan Nivo Slider theme folder an return theme list.
 */
function nivo_formatter_nivo_slider_themes() {
  // Path to nivo slider theme
  $theme_path = libraries_get_path('nivo-slider') . '/themes';
  // List themes
  $files = file_scan_directory($theme_path, '/.*/', array('recurse' => FALSE));

  $themes = array();
  if (is_array($files)) {
    foreach ($files as $path => $file) {
      if (is_dir($path) && file_exists($path . '/' . $file->filename . '.css')) {
        $themes[] = $file->filename;
      }
    }
  }

  return array_combine($themes, $themes);
}

/**
 * Settings prepare
 * @param array $settings
 *   Field instance formatter settings
 */
function nivo_formatter_settings($field_name, $settings) {
  $nivo_slide = $settings['nivo_formatter_nivo_slider'];
  $nivo_thumb = $settings['nivo_slider_thumbnail'];

  // Flatten effect array to string.
  if (is_array($settings['nivo_formatter_nivo_slider']['effect'])) {
    $nivo_slide['effect'] = implode(',', $nivo_slide['effect']);
  }

  // Return settings array
  $setting =  array(
    $field_name => array(
      'effect' => $nivo_slide['effect'],
      'slices' => $nivo_slide['slices'],
      'boxCols' => $nivo_slide['boxCols'],
      'boxRows' => $nivo_slide['boxRows'],
      'animSpeed' => $nivo_slide['animSpeed'],
      'pauseTime' => $nivo_slide['pauseTime'],
      'startSlide' => $nivo_slide['startSlide'],
      // returns 1
      'directionNav' => $nivo_slide['directionNav'],
      //'directionNavHide' => $nivo_slide['directionNavHide'],
      'controlNav' => $nivo_slide['controlNav'],
      'controlNavThumbs' => $nivo_thumb['controlNavThumbs'],
      //'controlNavThumbsFromRel' => $nivo_thumb['controlNavThumbs'],
      //'keyboardNav' => $nivo_slide['keyboardNav'],
      'pauseOnHover' => $nivo_slide['pauseOnHover'],
      //'manualAdvance' => $nivo_slide['manualAdvance'],
      //'captionOpacity' => $nivo_slide['captionOpacity'],
      'prevText' => $nivo_slide['prevText'],
      'nextText' => $nivo_slide['nextText'],
    ),
  );
  return $setting;
}